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検索詳細BIJU VASUDEVAN PILLAI (ビジユ ヴアスデヴアン ピライ)
| 電子科学研究所 物質科学研究部門 | 教授 |
経歴
■ 経歴経歴
- 2023年04月 - 現在
The University of Calicut, Science, Distinguished Professor, インド - 2023年03月 - 現在
インド工科大学, Chemistry, Visiting Professor, インド - 2016年02月 - 現在
北海道大学, Graduate School of Environmental Science, 教授, 日本国 - 2016年02月 - 現在
北海道大学, 電子科学研究所, 教授, 日本国 - 2016年04月 - 2019年03月
名古屋大学, 大学院工学研究科, Visiting Professor, 日本国 - 2010年04月 - 2016年01月
名古屋大学, 大学院工学研究科, Visiting Associate Professor, 日本国 - 2010年04月 - 2016年01月
産業技術総合研究所, Health Research Institute, 主任研究員, 日本国 - 2012年04月 - 2014年03月
大阪大学, 大学院基礎工学研究科, Visiting Scholar, 日本国 - 2011年10月 - 2013年09月
Southern University, USA, Environmental Toxicology, Adjunct Professor, アメリカ合衆国 - 2010年04月 - 2013年03月
関西学院大学, 理学部 化学科, Visiting Lecturer, 日本国 - 2008年04月 - 2012年03月
Kerala University, Center for Arthropod Bioresources and Biotechnology, Visiting Professor, インド - 2004年08月 - 2010年03月
産業技術総合研究所, Health Research Institute, 研究者, 日本国 - 2007年07月 - 2007年08月
University of Texas at Austin, USA, Department of Chemistry and Biochemistry, Visiting Scientist, アメリカ合衆国 - 2003年05月 - 2004年08月
Pacific Northwest National Laboratory, Department of Energy, USA, Fundamental Science Directorate, Postdoctoral Fellow, アメリカ合衆国 - 2002年03月 - 2003年05月
Nanotechnology Research Institute, AIST, Japan, Nanotechnology Research Institute, JSPS Postdoctoral Fellow, 日本国 - 2000年04月 - 2002年03月
Angstrom Technology Partnership, Tsukuba, Japan, Single-molecule Bioanalysis Laboratory, Postdoctoral Fellow, 日本国 - 1998年12月 - 2000年03月
CSIR-RRL (NIIST), Trivandrum, India, Photochemistry Division, Senior Research Fellow (SRF), Senior Research Fellow, インド - 1995年12月 - 1998年12月
CSIR-RRL (NIIST), Trivandrum, India, Photochemistry Division, Junior Research Fellow (JRF), インド - 1995年10月 - 1995年12月
Intelligence Bureau of India, North Block new Delhi, Intelligence Officer, インド
研究活動情報
■ 受賞- 2024年06月, Hokkaido University, The Presidential Award
Vasudevan Biju - 2023年09月, The Japanese Photochemistry Association, The Japanese Photochemistry Association Award
- 2018年09月, SERB, Department of Science and Technology, Government of India, SPARC Fellow
- 2018年08月, Department of Higher Education, Government of Kerala, India, Erudite Scholar
- 2016年03月, Ozaki Foundation, Gen'nai Award (源内賞)
- 2011年09月, Japanese Photochemistry Association, Young Scientist Award
- 2011年03月, The Chemical Society of Japan, Lectureship Prize
- 2010年11月, The Royal Society of Chemistry, England, Fellow of the Royal Society of Chemistry
- 2010年10月, JST さきがけ, JST さきがけ
- 2010年10月, Asian and Oceanian Photochemistry Association (APA), Young Scientist Award
- 2010年03月, The Chemical Society of Japan, Distinguished Lectureship Award
- 2008年03月, Ozaki Foundation, Gen'nai Encouragement Award (源内奨励賞)
- 2002年03月, Japan Society for the Promotion of Science (JSPS), JSPS PD (Foreign)
- 1995年12月, Government of India, UGC-CSIR NET and JRF
- 1988年03月, Children's Friend High School, Kottiyam, Thomas Memorial School Topper Award
- Photoluminescence Enhancement in Zero-Dimensional Hybrid Copper Halide Single Crystals
Rahul Ghosh Dastidar; Takuya Okamoto; Kiyonori Takahashi; Shailesh Rana; Kamlesh Awasthi; Nobuhiro Ohta; Challapalli Subrahmanyam; Vasudevanpillai Biju
CHEMISTRY OF MATERIALS, 2025年12月22日
英語, 研究論文(学術雑誌) - Photoluminescence enhancement by exciton-plasmon coupling in MAPbI3 quantum dots on gold nanorods
Tianci Wang; Tetsuro Katayama; Xu Shi; Akihiro Furube; Takuya Okamoto; Vasudevanpillai Biju
NPG ASIA MATERIALS, 17, 1, 2025年11月28日
英語, 研究論文(学術雑誌) - Amplified emission from halide perovskite quantum dots by exciton-plasmon-coupled energy transfer in the neutral and trion states on gold nanoparticles
Bhagyashree Mahesha Sachith; Yifei Xia; Tianci Wang; Takuya Okamoto; Syoji Ito; Li Wang; Xu Shi; Naoto Tamai; Hiroshi Miyasaka; Hiroaki Misawa; Vasudevanpillai Biju
JOURNAL OF MATERIALS CHEMISTRY A, 2025年11月17日
英語, 研究論文(学術雑誌) - Near infrared light-assisted photoelectrochemical conversion and environmental remediation
Mohit Kumar; Phyu Phyu Cho; Rajesh Kumar Sethi; Vasudevanpillai Biju; Challapalli Subrahmanyam
Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 64, 100710, 100710, Elsevier BV, 2025年08月, [査読有り], [責任著者]
英語, 研究論文(学術雑誌) - Modulating Band Alignment and Passivating Defects with In‐Situ Bi‐Substituted Cu2ZnSnS4 for Superior Photo‐/Electrochemical Water Splitting
Mohit Kumar; Palak Chugh; Takuya Okamoto; Arup Mahata; Vasudevanpillai Biju; Subrahmanyam Challapalli
Small, 21, 36, Wiley, 2025年07月31日, [査読有り], [責任著者]
英語, 研究論文(学術雑誌), Abstract
Tailoring semiconductor properties through cation substitution is a promising strategy to improve the intrinsic properties of a photoabsorber material by improving charge carrier statistics, kinetics, and efficiency of photo‐/electrocatalytic conversions. In the current study, Cu2ZnSnS4 (CZTS) thin film photocathodes are investigated by partially replacing Zn with Bi by fabricating Cu2Zn1−xBixSnS4 (x = 0.02, 0.04, 0.06, and 0.08) (x‐CZBTS; x: 2, 4, 6, and 8) thin films. Incorporating Bi replacing Zn reduce bulk defects, secondary phases, and CuZn antisites and promote ease of crystallization with a decrease in crystallization temperature. Bi‐doping modulates the CZTS film band‐gap with a greater absorption coefficient, red shift, and charge collection. CZBTS coated with CdS/Pt (x‐CZBTS‐cp) films delivered photocurrent density (−4.0, −7.2, −5.2, and −1.3 mA cm−2 at 0 VRHE for x: 2, 4, 6, and 8, respectively). 4‐CZBTS‐cp with the highest J (ηSTH = 1.62% at 0.45 VRHE, 95 µmol cm−2 h−1 H2 evolution, F.E. = 90%, and Eonset = 0.71VRHE) showed 82% photocurrent density retention after 10h in 1 m kPi buffer (pH 7). DFT and experimental studies underscore improved PEC performance owing to significant Bi contribution in conduction band of CZBTS, lowering bandgap, elongating photogenerated charge carrier lifetime, rapid charge separation/transport, and charge accumulation at the Bi−S site on the surface with optimal Gibbs free energy (ΔGH*) for CZBTS on photoexcitation. - Organic Electron Acceptors for FAPbI
3 Perovskites in Solutions and Solar Cells
Kangjian Xu; Palyam Subramanyam; Takuya Okamoto; Ch Subrahmanyam; Vasudevanpillai Biju
Journal of Physical Chemistry C, 129, 3, 1569, 1574, 2025年01月23日
研究論文(学術雑誌) - Adaptable Blueprint for Non-metal Near-Infrared Organic Photocatalysts by Aromatic Sulfones
Kazuya Yoshida; Toshiaki Suzuki; Vasudevanpillai Biju; Yuta Takano
ACS Applied Materials & Interfaces, 17, 3, 4813, 4820, American Chemical Society (ACS), 2025年01月13日
研究論文(学術雑誌) - Exploring photo-excited states of aromatic sulfones for efficient near-infrared-activated photothermal cancer therapy
Kazuya Yoshida; Toshiaki Suzuki; Yasuko Osakada; Mamoru Fujitsuka; Yukiko Miyatake; Vasudevanpillai Biju; Yuta Takano
Bulletin of the Chemical Society of Japan, 98, 1, Oxford University Press (OUP), 2025年01月08日
研究論文(学術雑誌), Abstract
Near-infrared light activation enhances phototherapeutic efficacy due to deep-tissue penetration and minimal invasion. While near-infrared-phototherapeutic agents are widely studied, conventional designs often increase molecular size, affecting pharmacokinetics. This study elucidates the photo-excited states of sulfone-containing aromatic compounds as efficient near-infrared-activated photothermal agents for cancer therapy. We synthesized sulfone-rosamine compounds (3 and 4) exhibiting strong optical absorption around 700 nm, attributed to a unique orbital in the LUMO. Compound 4, 35% smaller than conventional near-infrared-dye molecules, such as Cy5.5 (0.86 nm3/molecule), enhances intracellular mobility. Upon photoexcitation, 4 undergoes rapid non-radiative relaxation, resulting in remarkable photothermal effects and photostability. Transient absorption spectroscopy and density functional theory calculations revealed a mechanism involving rapid non-radiative deactivation after illumination, efficiently converting light to heat. The near-infrared-induced photothermal effect effectively killed various cancer cell lines, including HeLa, MDA-MB-231, and PCI-55. This study provides guidelines for designing novel photodrugs with improved intracellular mobility, near-infrared light responsiveness, and photostability, and introduces the advancement of cancer treatment. - Colloidally synthesized and bandgap-engineered luminescent titanium nitride quantum dots
Aswathi Maladan; Takuya Okamoto; Mohit Kumar; Most Farida Khatun; Yasutaka Matsuo; Challapalli Subrahmanyam; Vasudevanpillai Biju
Nanoscale, 17, 44, 25484, 25489, Royal Society of Chemistry (RSC), 2025年
研究論文(学術雑誌), We demonstrate the colloidal synthesis of luminescent titanium nitride (TiN) quantum dots with multicolor emission and tunable band gaps, providing safer alternatives to metal chalcogenides and halide perovskites for solar cells and LEDs. - From halide perovskite nanocrystals to supercrystals: fundamentals and applications
S. L. Aneesha; Yifei Xia; Takuya Okamoto; Deepika Gaur; Sudipta Seth; Johan Hofkens; Lakshminarayana Polavarapu; Vasudevanpillai Biju
Chemical Society Reviews, 54, 21, 9585, 9611, Royal Society of Chemistry (RSC), 2025年
研究論文(学術雑誌), Halide perovskite supercrystals (or superlattices) are electronically coupled nanomaterials, such as nanocrystals, quantum dots, or nanoplatelets that offer collective optical and electronic properties distinct from those of their constituents. - Engineered 2D Boron Nitride Flexible Electrodes for Supercapacitors
Rosmy Joy; Sumit Chahal; Vasudevanpillai Biju; Prashant Kumar; Suja Haridas
ACS Applied Energy Materials, 7, 21, 9766, 9774, American Chemical Society (ACS), 2024年10月24日, [査読有り]
英語, 研究論文(学術雑誌) - Transfer of 2D Films: From Imperfection to Perfection
Phuong V. Pham; The-Hung Mai; Saroj P. Dash; Vasudevanpillai Biju; Yu-Lun Chueh; Deep Jariwala; Vincent Tung
ACS Nano, 18, 23, 14841, 14876, American Chemical Society (ACS), 2024年05月29日, [査読有り]
英語, 研究論文(学術雑誌) - Bio-catalytic nanoparticle shaping for preparing mesoscopic assemblies of semiconductor quantum dots and organic molecules.
Rumana Akter; Nicholas Kirkwood; Samantha Zaman; Bang Lu; Tinci Wang; Satoru Takakusagi; Paul Mulvaney; Vasudevanpillai Biju; Yuta Takano
Nanoscale horizons, 2024年05月23日, [国際誌]
英語, 研究論文(学術雑誌), We report a unique bio-catalytic nanoparticle shaping (BNS) method for preparing a variety of mesoscopic particles by a facile process. For example, the BNS method affords mesoscopic QD assembly dispersions. Large-size sedimentations (>1 μm) of QDs are first formed using oligo-L-lysine linkers. These then undergo controlled enzymatic cleavage of the linkers using trypsin, which surprisingly leads to mesoscopic particles about 84 nm in size with a narrow size distribution. A detailed mechanism of the BNS method is investigated using tetrakis(4-carboxyphenyl)porphyrin (TCPP), instead of QDs, as a probe molecule. Interestingly, the BNS method can also be applied to other combinations of enzymes and enzymatically degradable linkers, such as hyaluronidase with hyaluronan. As a potential application, the mesoscopic particles of QDs and oligo-lysine exhibit their ability to act as a drug delivery carrier originating from the features of both QDs and oligo-lysine. The BNS method demonstrates the universality and versatility of preparing mesoscopic particles and opens new doors for studying QD assemblies and molecular-based mesoscopic particles. - Distance-Dependent Energy Transfer under Modal Strong Coupling from CdSe/ZnS Quantum Dots to a Plasmonic Fabry–Pérot Cavity
Takuya Okamoto; Azusa Onishi; Xu Shi; Tomoya Oshikiri; Kosei Ueno; Hiroaki Misawa; Vasudevanpillai Biju
The Journal of Physical Chemistry C, 128, 10, 4208, 4214, American Chemical Society (ACS), 2024年02月28日, [査読有り], [筆頭著者, 最終著者, 責任著者]
研究論文(学術雑誌) - Photosensitizer-singlet oxygen sensor conjugated silica nanoparticles for photodynamic therapy and bioimaging.
Jeladhara Sobhanan; Kenji Ono; Takuya Okamoto; Makoto Sawada; Paul S Weiss; Vasudevanpillai Biju
Chemical Science, 15, 6, 2007, 2018, 2024年02月07日, [査読有り], [筆頭著者, 最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), Intracellular singlet oxygen (1O2) generation and detection help optimize the outcome of photodynamic therapy (PDT). Theranostics programmed for on-demand phototriggered 1O2 release and bioimaging have great potential to transform PDT. We demonstrate an ultrasensitive fluorescence turn-on sensor-sensitizer-RGD peptide-silica nanoarchitecture and its 1O2 generation-releasing-storing-sensing properties at the single-particle level or in living cells. The sensor and sensitizer in the nanoarchitecture are an aminomethyl anthracene (AMA)-coumarin dyad and a porphyrin or CdSe/ZnS quantum dots (QDs), respectively. The AMA in the dyad quantitatively quenches the fluorescence of coumarin by intramolecular electron transfer, the porphyrin or QD moiety generates 1O2, and the RGD peptide facilitates intracellular delivery. The small size, below 200 nm, as verified by scanning electron microscopy and differential light scattering measurements, of the architecture within the 1O2 diffusion length enables fast and efficient intracellular fluorescence switching by the tandem ultraviolet (UV)-visible or visible-near-infrared (NIR) photo-triggering. While the red emission and 1O2 generation by the porphyrin are continually turned on, the blue emission of coumarin is uncaged into 230-fold intensity enhancement by on-demand photo-triggering. The 1O2 production and release by the nanoarchitecture enable spectro-temporally controlled cell imaging and apoptotic cell death; the latter is verified from cytotoxic data under dark and phototriggering conditions. Furthermore, the bioimaging potential of the TCPP-based nanoarchitecture is examined in vivo in B6 mice. - Dual-color photoluminescence modulation of zero-dimensional hybrid copper halide microcrystals.
Rahul Ghosh Dastidar; Takuya Okamoto; Kiyonori Takahashi; Yuta Takano; Chakkooth Vijayakumar; Challapalli Subrahmanyam; Vasudevanpillai Biju
Nanoscale, 2024年01月16日, [査読有り], [筆頭著者, 最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), Zero-dimensional hybrid copper(I) halides (HCHs) are attractive due to their interesting photoluminescence (PL) properties and the high abundance and low toxicity of copper. In this study, we report green-red dual emission from rhombic 1-butyl-1-methyl piperidinium copper bromide [(Bmpip)2Cu2Br4] microcrystals (MCs) prepared on borosilicate glass. The structure and elemental composition of the MCs are characterized by single crystal X-ray diffraction analysis, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Interestingly, MCs prepared on an ITO-coated glass plate show an intense green emission compared to the dual emission on a bare glass or plastic substrate. Furthermore, the intensity of the green emission from the MC is enormously increased by powdering using a conductive material, suggesting the deactivation of the red-emitting state by a charge transfer interaction with the conductor. These findings open a new strategy to suppress the self-trapping of excitons by longitudinal optical phonons and control the dual emitting states in HCHs. - Multidisciplinary Science and Academic Collaborations Empowered by Photochemistry Societies and Conferences
Vasudevan Pillai Biju
Photochemistry, 55, 1, 2024年, [招待有り], [筆頭著者]
英語, 研究論文(学術雑誌) - Thermally Induced Reversible Fluorochromism by Self-Trapped Excitonic Emission in a Two-Dimensional Hybrid Copper(I)-Halide Single Crystal
Amarjith V Dev; Manasa G. Basavarajappa; Swapnil S. Deshpande; Poulomi Mukherjee; Avija Ajayakumar; Chinnadurai Muthu; Takuya Okamoto; Sudip Chakraborty; D. D. Sarma; Vasudevanpillai Biju; Chakkooth Vijayakumar
Chemistry of Materials, 2024年
研究論文(学術雑誌) - π-extended porphyrin-based near-infrared photosensitizers for mitochondria-targeted photodynamic therapy
Hanjun Zhao; Rina Naganawa; Yuma Yamada; Yasuko Osakada; Mamoru Fujitsuka; Hideyuki Mitomo; Yukiko Miyatake; Hideyoshi Harashima; Vasudevanpillai Biju; Yuta Takano
Journal of Photochemistry and Photobiology A: Chemistry, 115397, 115397, Elsevier BV, 2023年12月, [査読有り], [責任著者]
研究論文(学術雑誌) - Lead‐Free Halide Perovskite Materials and Optoelectronic Devices: Progress and Prospective
Iago López‐Fernández; Donato Valli; Chun‐Yun Wang; Subarna Samanta; Takuya Okamoto; Yi‐Teng Huang; Kun Sun; Yang Liu; Vladimir S. Chirvony; Avijit Patra; Juliette Zito; Luca De Trizio; Deepika Gaur; Hong‐Tao Sun; Zhiguo Xia; Xiaoming Li; Haibo Zeng; Iván Mora‐Seró; Narayan Pradhan; Juan P. Martínez‐Pastor; Peter Müller‐Buschbaum; Vasudevanpillai Biju; Tushar Debnath; Michael Saliba; Elke Debroye; Robert L. Z. Hoye; Ivan Infante; Liberato Manna; Lakshminarayana Polavarapu
Advanced Functional Materials, 34, 6, Wiley, 2023年10月27日, [査読有り]
研究論文(学術雑誌), Abstract
Halide perovskites, in the form of thin films and colloidal nanocrystals, have recently taken semiconductor optoelectronics research by storm, and have emerged as promising candidates for high‐performance solar cells, light‐emitting diodes (LEDs), lasers, photodetectors, and radiation detectors. The impressive optical and optoelectronic properties, along with the rapid increase in efficiencies of solar cells and LEDs, have greatly attracted researchers across many disciplines. However, most advances made so far in terms of preparation (colloidal nanocrystals and thin films), and the devices with highest efficiencies are based on Pb‐based halide perovskites, which have raised concerns over their commercialization due to the toxicity of Pb. This has triggered the search for lower‐toxicity Pb‐free halide perovskites and has led to significant progress in the last few years. In this roadmap review, researchers of different expertise have joined together to summarize the latest progress, outstanding challenges, and future directions of Pb‐free halide perovskite thin films and nanocrystals, regarding their synthesis, optical spectroscopy, and optoelectronic devices, to guide the researchers currently working in this area as well as those that will join the field in the future. - Self-assembled halide perovskite quantum dots in polymer thin films showing temperature-controlled exciton recombination.
Most Farida Khatun; Takuya Okamoto; Vasudevanpillai Biju
Chemical communications (Cambridge, England), 2023年10月20日, [査読有り], [筆頭著者, 最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), Rationally assembled supramolecular structures of organic chromophores or semiconductor nanomaterials show excitonic properties different from individual molecules or nanoparticles. We report polymer-assisted assembly formation and thermal modulation of excitonic recombination in self-assembled formamidinium lead bromide perovskite quantum dots. - Free-standing 2D gallium nitride for electronic, excitonic, spintronic, piezoelectric, thermoplastic, and 6G wireless communication applications
Tumesh Kumar Sahu; Saroj Pratap Sahu; K. P. S. S. Hembram; Jae-Kap Lee; Vasudevanpillai Biju; Prashant Kumar
NPG Asia Materials, 15, 1, Springer Science and Business Media LLC, 2023年09月22日, [査読有り], [責任著者]
研究論文(学術雑誌), Abstract
Two-dimensional gallium nitride (2D GaN) with a large direct bandgap of ~5.3 eV, a high melting temperature of ~2500 °C, and a large Young’s modulus ~20 GPa developed for miniaturized interactive electronic gadgets can function at high thermal and mechanical loading conditions. Having various electronic, optoelectronic, spintronic, energy storage devices and sensors in perspective and the robust nature of 2D GaN, it is highly imperative to explore new pathways for its synthesis. Moreover, free-standing sheets will be desirable for large-area applications. We report our discovery of the synthesis of free-standing 2D GaN atomic sheets employing sonochemical exfoliation and the modified Hummers method. Exfoliated 2D GaN atomic sheets exhibit hexagonal and striped phases with microscale lateral dimensions and excellent chemical phase purity, confirmed by Raman and X-ray photoelectron spectroscopy. 2D GaN is highly stable, as confirmed by TGA measurements. While photodiode, FET, spintronics, and SERS-based molecular sensing, IRS element in 6G wireless communication applications of 2D GaN have been demonstrated, its nanocomposite with PVDF exhibits an excellent thermoplastic and piezoelectric behavior. - Exploring CuBi2O4 as a Promising Photocathode Material for PEC Water Splitting
Bhagatram Meena; Mohit Kumar; Rosalie K. Hocking; Saulius Juodkazis; Vasudevanpillai Biju; Palyam Subramanyam; Challapalli Subrahmanyam
Energy & Fuels, 37, 18, 14280, 14289, American Chemical Society (ACS), 2023年09月05日, [査読有り]
研究論文(学術雑誌) - Highly Luminescent and Stable Halide Perovskite Nanocrystals by Interfacial Defect Passivation and Amphiphilic Ligand Capping.
Sushant Ghimire; Most Farida Khatun; Bhagyashree M Sachith; Takuya Okamoto; Jeladhara Sobhanan; Ch Subrahmanyam; Vasudevanpillai Biju
ACS applied materials & interfaces, 15, 34, 41081, 41091, 2023年08月30日, [査読有り], [筆頭著者, 最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), Halide vacancies cause lattice degradation and nonradiative losses in halide perovskites. In this study, we strategically fill bromide vacancies in CsPbBr3 perovskite nanocrystals with NaBr, KBr, or CsBr at the organic-aqueous interface for hydrophobic ligand-capped nanocrystals or in a polar solvent (2-propanol) for amphiphilic ligand-capped nanocrystals. Energy-dispersive X-ray spectra, powder X-ray diffraction data, and scanning transmission electron microscopy images help us confirm vacancy filling and the structures of samples. The bromide salts increase the photoluminescence quantum yield (98 ± 2%) of CsPbBr3 by decreasing the nonradiative decay rate. Single-particle studies show the quantum yield increase originates from the poorly luminescent nanocrystals becoming highly luminescent after filling vacancies. Furthermore, we tune the optical band gap (ultraviolet-visible-near-infrared) of the hydrophobic ligand-capped nanocrystals by halide exchange at the toluene-water interface using saturated NaCl or NaI solutions, which completes in about 60 min under continuous mixing. In contrast, the amphiphilic ligand accelerates the halide exchange in 2-propanol, suggesting ambipolar functional groups speed up the ion-exchange reaction. The bromide vacancy-filled or halide-exchanged samples in a toluene-water biphasic solvent show higher stability than amphiphilic ligand-capped samples in 2-propanol. This strategy of defect passivation, ion exchange, and ligand chemistry to improve quantum yields and tune band gaps of halide perovskite nanocrystals can be promising for designing stable and water-soluble perovskite samples for solar cells, light-emitting diodes, photodetectors, and photocatalysts. - Thermodynamically and Kinetically Controlled Nucleation and Growth of Halide Perovskite Single Crystals.
Dong Zhang; Takuya Okamoto; Vasudevanpillai Biju
Small (Weinheim an der Bergstrasse, Germany), e2304900, 2023年07月25日, [査読有り], [筆頭著者, 最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), Halide perovskites are ideal for next-generation optical devices and photovoltaics. Although perovskite single-crystals show reproducible optoelectronic properties, significant variations in the crystal size, anisotropy, density, defects, photoluminescence (PL), and carrier lifetime affect the sample properties and device performances. Homogenous size and shape FA/MAPbBr3 single microcrystals (MCs) with controlled edge lengths, crystal densities, PL lifetimes, and PL intensities are prepared by thermodynamically controlling and kinetically separating the crystal nucleation-growth processes using optimum N-cyclohexyl-2-pyrrolidone (CHP) concentration. The crystal growth kinetics at different CHP concentrations and temperatures are estimated spectroscopically by measuring the concentration of Pb (II). High-density cubic MCs with a homogenous size distribution, high PL intensities, and long PL lifetimes are obtained within minutes at high temperatures by the controlled addition of the pyrrolidone derivative. Conversely, the crystal size nonlinearly increases with time at low temperatures. The isotropically grown high-density single crystals at controlled nucleation-growth rates at 190 °C with 20% CHP show the highest PL intensity and the longest PL lifetimes. This method offers thermodynamic and kinetic control of perovskite single-crystal growth with shape control. - Slipping-Free Halide Perovskite Supercrystals from Supramolecularly-Assembled Nanocrystals.
Takuya Okamoto; Vasudevanpillai Biju
Small (Weinheim an der Bergstrasse, Germany), e2303496, 2023年05月12日, [査読有り], [筆頭著者, 最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), Supramolecularly assembled high-order supercrystals (SCs) help control the dielectric, electronic, and excitonic properties of semiconductor nanocrystals (NCs) and quantum dots (QDs). Ligand-engineered perovskite NCs (PNCs) assemble into SCs showing shorter excitonic lifetimes than strongly dielectric PNC films showing long photoluminescence (PL) lifetimes and long-range carrier diffusion. Monodentate to bidentate ligand exchange on ≈ 8 nm halide perovskite (APbX3 ; A:Cs/MA, X:Br/I) PNCs generates mechanically stable SCs with close-packed lattices, overlapping electronic wave functions, and higher dielectric constant, providing distinct excitonic properties from single PNCs or PNC films. From Fast Fourier Transform (FFT) images, time-resolved PL, and small-angle X-ray scattering, structurally and excitonically ordered large SCs are identified. An Sc shows a smaller spectral shift (<35 meV) than a PNC film (>100 meV), a microcrystal (>100 meV), or a bulk crystal (>100 meV). Also, the exciton lifetime (<10 ns) of an SC is excitation power-independent in the single exciton regime 〈N〉<1, comparable to an isolated PNC. Therefore, bidentate-ligand-assisted SCs help overcome delayed exciton or carrier recombination in halide perovskite nanocrystal assemblies or films. - Recent progress in the development of high-efficiency inverted perovskite solar cells
Sanwan Liu; Vasudevan P. Biju; Yabing Qi; Wei Chen; Zonghao Liu
NPG Asia Materials, 15, 1, Springer Science and Business Media LLC, 2023年05月05日, [査読有り], [責任著者]
研究論文(学術雑誌), Abstract
Perovskite solar cells (PSCs) have attracted much attention due to their low-cost fabrication and high power conversion efficiency (PCE). However, the long-term stability issues of PSCs remain a significant bottleneck impeding their commercialization. Inverted PSCs with a p-i-n architecture are being actively researched due to their concurrent good stability and decent efficiency. In particular, the PCE of inverted PSCs has improved significantly in recent years and is now almost approaching that of n-i-p PSCs. This review summarizes recent progress in the development of high-efficiency inverted PSCs, including the development of perovskite compositions, fabrication methods, and counter electrode materials (CEMs). Notably, we highlight the development of charge transport materials (CTMs) and the effects of defect passivation strategies on the performance of inverted PSCs. Finally, we discuss the remaining issues and perspectives of high-efficiency inverted PSCs. - Photoinduced interfacial electron transfer from perovskite quantum dots to molecular acceptors for solar cells.
Bhagyashree Mahesha Sachith; Zhijing Zhang; Palyam Subramanyam; Challapalli Subrahmanyam; Akihiro Furube; Naoto Tamai; Takuya Okamoto; Hiroaki Misawa; Vasudevanpillai Biju
Nanoscale, 15, 17, 7695, 7702, 2023年05月04日, [査読有り], [筆頭著者, 最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), Bandgap-engineered inorganic and hybrid halide perovskite (HP) films, nanocrystals, and quantum dots (PQDs) are promising for solar cells. Fluctuations of photoinduced electron transfer (PET) rates affect the interfacial charge separation efficiencies of such solar cells. Electron donor- or acceptor-doped perovskite samples help analyze PET and harvest photogenerated charge carriers efficiently. Therefore, PET in perovskite-based donor-acceptor (D-A) systems has received considerable attention. We analyzed the fluctuations of interfacial PET from MAPbBr3 or CsPbBr3 PQDs to classical electron acceptors such as 7,7,8,8-tetracyanoquinodimethane (TCNQ) and 1,2,4,5-tetracyanobenzene (TCNB) at single-particle and ensemble levels. The significantly negative Gibbs free energy changes of PET estimated from the donor-acceptor redox potentials, the donor-acceptor sizes, and the solvent dielectric properties help us clarify the PET in the above D-A systems. The dynamic nature of PET is apparent from the decrease in photoluminescence (PL) lifetimes and PL photocounts of PQDs with an increase in the acceptor concentrations. Also, the acceptor radical anion spectrum helps us characterize the charge-separated states. Furthermore, the PL blinking time and PET rate fluctuations (108 to 107 s-1) provide us with single-molecule level information about interfacial PET in perovskites. - Luminescent quantum dots: Synthesis, optical properties, bioimaging and toxicity.
Jeladhara Sobhanan; Jose V Rival; Abdulaziz Anas; Edakkattuparambil Sidharth Shibu; Yuta Takano; Vasudevanpillai Biju
Advanced drug delivery reviews, 197, 114830, 114830, 2023年04月20日, [査読有り], [筆頭著者, 最終著者, 責任著者], [国際誌]
英語, 研究論文(学術雑誌), Luminescent nanomaterials such as semiconductor nanocrystals (NCs) and quantum dots (QDs) attract much attention to optical detectors, LEDs, photovoltaics, displays, biosensing, and bioimaging. These materials include metal chalcogenide QDs and metal halide perovskite NCs. Since the introduction of cadmium chalcogenide QDs to biolabeling and bioimaging, various metal nanoparticles (NPs), atomically precise metal nanoclusters, carbon QDs, graphene QDs, silicon QDs, and other chalcogenide QDs have been infiltrating the nano-bio interface as imaging and therapeutic agents. Nanobioconjugates prepared from luminescent QDs form a new class of imaging probes for cellular and in vivo imaging with single-molecule, super-resolution, and 3D resolutions. Surface modified and bioconjugated core-only and core-shell QDs of metal chalcogenides (MX; M = Cd/Pb/Hg/Ag, and X = S/Se/Te,), binary metal chalcogenides (MInX2; M = Cu/Ag, and X = S/Se/Te), indium compounds (InAs and InP), metal NPs (Ag, Au, and Pt), pure or mixed precision nanoclusters (Ag, Au, Pt), carbon nanomaterials (graphene QDs, graphene nanosheets, carbon NPs, and nanodiamond), silica NPs, silicon QDs, etc. have become prevalent in biosensing, bioimaging, and phototherapy. While heavy metal-based QDs are limited to in vitro bioanalysis or clinical testing due to their potential metal ion-induced toxicity, carbon (nanodiamond and graphene) and silicon QDs, gold and silica nanoparticles, and metal nanoclusters continue their in vivo voyage towards clinical imaging and therapeutic applications. This review summarizes the synthesis, chemical modifications, optical properties, and bioimaging applications of semiconductor QDs with particular references to metal chalcogenide QDs and bimetallic chalcogenide QDs. Also, this review highlights the toxicity and pharmacokinetics of QD bioconjugates. - Nanomaterials for Fluorescence and Multimodal Bioimaging
Jeladhara Sobhanan; Abdulaziz Anas; Vasudevanpillai Biju
The Chemical Record, 23, 3, Wiley, 2023年02月15日, [査読有り], [筆頭著者, 最終著者, 責任著者]
研究論文(学術雑誌), Abstract
Bioconjugated nanomaterials replace molecular probes in bioanalysis and bioimaging in vitro and in vivo. Nanoparticles of silica, metals, semiconductors, polymers, and supramolecular systems, conjugated with contrast agents and drugs for image‐guided (MRI, fluorescence, PET, Raman, SPECT, photodynamic, photothermal, and photoacoustic) therapy infiltrate into preclinical and clinical settings. Small bioactive molecules like peptides, proteins, or DNA conjugated to the surfaces of drugs or probes help us to interface them with cells and tissues. Nevertheless, the toxicity and pharmacokinetics of nanodrugs, nanoprobes, and their components become the clinical barriers, underscoring the significance of developing biocompatible next‐generation drugs and contrast agents. This account provides state‐of‐the‐art advancements in the preparation and biological applications of bioconjugated nanomaterials and their molecular, cell, and in vivo applications. It focuses on the preparation, bioimaging, and bioanalytical applications of monomodal and multimodal nanoprobes composed of quantum dots, quantum clusters, iron oxide nanoparticles, and a few rare earth metal ion complexes. - Halide Perovskite Single Crystals and Nanocrystal Films as Electron Donor-Acceptor Heterojunctions
M. D. Shahjahan; Takuya Okamoto; Lata Chouhan; Bhagyashree Mahesha Sachith; Narayan Pradhan; Hiroaki Misawa; Vasudevanpillai Biju
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2022年12月, [査読有り], [筆頭著者, 最終著者, 責任著者]
英語, 研究論文(学術雑誌) - Caging and photo-triggered uncaging of singlet oxygen by excited state engineering of electron donor–acceptor-linked molecular sensors
Devika Sasikumar; Yuta Takano; Hanjun Zhao; Reiko Kohara; Morihiko Hamada; Yasuhiro Kobori; Vasudevanpillai Biju
Scientific Reports, 12, 1, Springer Science and Business Media LLC, 2022年12月, [査読有り], [筆頭著者, 最終著者, 責任著者]
英語, 研究論文(学術雑誌), Abstract
Singlet oxygen (1O2), one of the most sought-after species in oxidative chemical reactions and photodynamic cancer therapy, is activated and neutralized in the atmosphere and living cells. It is essential to see "when" and "where" 1O2 is produced and delivered to understand and utilize it. There is an increasing demand for molecular sensor tools to capture, store, and supply 1O2, controlled by light and engineered singlet and triplet states, indicating the 1O2-capturing-releasing state. Here, we demonstrate the outstanding potential of an aminocoumarin-methylanthracene-based electron donor–acceptor molecule (1). Spectroscopic measurements confirm the formation of an endoperoxide (1-O2) which is not strongly fluorescent and remarkably different from previously reported 1O2 sensor molecules. Moreover, the photoexcitation on the dye in 1-O2 triggers fluorescence enhancement by the oxidative rearrangement and a competing 1O2 release. The unique ability of 1 will pave the way for the spatially and temporally controlled utilization of 1O2 in various areas such as chemical reactions and phototherapies. - Transition Metal-Doped Boron Nitride Atomic Sheets with an Engineered Bandgap and Magnetization
Sumit Chahal; Tumesh Kumar Sahu; Subhasmita Kar; Soumya J. Ray; Vasudevanpillai Biju; Prashant Kumar
The Journal of Physical Chemistry C, 126, 49, 21084, 21093, American Chemical Society (ACS), 2022年11月18日, [査読有り], [責任著者]
研究論文(学術雑誌) - Photoeradication of aquatic pathogens by curcumin for clean and safe drinking water
Sulfiya K. Moideen; Abdulaziz Anas; Jeladhara Sobhanan; Hanjun Zhao; Vasudevanpillai Biju
Journal of Photochemistry and Photobiology A: Chemistry, 432, 114104, 114104, Elsevier BV, 2022年11月, [査読有り], [筆頭著者, 最終著者, 責任著者]
英語, 研究論文(学術雑誌) - Electroluminescence of Halide Perovskite Single Crystals Showing Stochastically Active Multiple Emitting Centers
Sankaramangalam Balachandran Bhagyalakshmi; Dong Zhang; Vasudevanpillai Biju
The Journal of Physical Chemistry C, 126, 42, 17826, 17835, American Chemical Society (ACS), 2022年10月17日, [査読有り], [筆頭著者, 最終著者, 責任著者]
研究論文(学術雑誌) - Excitation‐Wavelength‐dependent Functionalities of Temporally‐controlled Sensing and Generation of Singlet Oxygen by a Photoexcited State Engineered Rhodamine 6G‐anthracene Conjugate
Hanjun Zhao; Yuta Takano; Devika Sasikumar; Yukiko Miyatake; Vasudevanpillai Biju
Chemistry – A European Journal, 2022年10月12日, [査読有り], [筆頭著者, 最終著者, 責任著者]
英語, 研究論文(学術雑誌) - Inorganic Chain Mediated Excitonic Properties in One-Dimensional Lead Halide Hybrid Perovskites
Chen Xue; Hengming Huang; Sadafumi Nishihara; Vasudevanpillai Biju; Xiao-ming Ren; Takayoshi Nakamura
The Journal of Physical Chemistry Letters, 13, 32, 7405, 7412, American Chemical Society (ACS), 2022年08月18日, [査読有り]
英語, 研究論文(学術雑誌) - Multimodal CTC detection using stem cell antigen-specific immunosilica particles and immunofluorescent quantum dots
Jeladhara Sobhanan; Yuta Takano; Sakiko Sugino; Eri Hirata; Shohei Yamamura; Vasudevanpillai Biju
NPG ASIA MATERIALS, 14, 1, 2022年01月, [査読有り], [筆頭著者, 最終著者, 責任著者]
英語, 研究論文(学術雑誌) - Mechano-optical Modulation of Excitons and Carrier Recombination in Self-Assembled Halide Perovskite Quantum Dots
Zhijing Zhang; Sushant Ghimire; Takuya Okamoto; Bhagyashree Mahesha Sachith; Jeladhara Sobhanan; Challapalli Subrahmanyam; Vasudevanpillai Biju
ACS NANO, 2022年01月, [査読有り], [筆頭著者, 最終著者, 責任著者]
英語, 研究論文(学術雑誌) - Molecular recognition in the infection, replication, and transmission of COVID-19-causing SARS-CoV-2: an emerging interface of infectious disease, biological chemistry, and nanoscience
Prem Kumar; Jeladhara Sobhanan; Yuta Takano; Vasudevanpillai Biju
NPG Asia Materials, 13, 1, 2021年12月, [査読有り], [筆頭著者, 最終著者, 責任著者]
英語, 研究論文(学術雑誌) - Advances in photodynamic antimicrobial chemotherapy
Abdulaziz Anas; Jeladhara Sobhanan; K.M. Sulfiya; C. Jasmin; P.K. Sreelakshmi; Vasudevanpillai Biju
Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 49, 100452, 100452, Elsevier BV, 2021年12月, [査読有り], [筆頭著者, 最終著者, 責任著者]
研究論文(学術雑誌) - Emerging Materials for Plasmon-assisted Photoelectrochemical Water Splitting
Palyam Subramanyam; Bhagatram Meena; Vasudevanpillai Biju; Hiroaki Misawa; Subrahmanyam Challapalli
Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 100472, 100472, Elsevier BV, 2021年11月, [査読有り]
研究論文(学術雑誌) - Long-Range Interfacial Charge Carrier Trapping in Halide Perovskite-C60 and Halide Perovskite-TiO2 Donor–Acceptor Films
Bhagyashree Mahesha Sachith; Takuya Okamoto; Sushant Ghimire; Tomokazu Umeyama; Yuta Takano; Hiroshi Imahori; Vasudevanpillai Biju
The Journal of Physical Chemistry Letters, 12, 35, 8644, 8651, 2021年09月09日, [査読有り], [筆頭著者, 最終著者, 責任著者]
英語, 研究論文(学術雑誌) - Efficient solar water splitting using a CdS quantum dot decorated TiO2/Ag2Se photoanode
Bhagatram Meena; Palyam Subramanyam; Duvvuri Suryakala; Vasudevanpillai Biju; Challapalli Subrahmanyam
International Journal of Hydrogen Energy, Elsevier BV, 2021年08月, [査読有り]
研究論文(学術雑誌) - State of the Art and Prospects for Halide Perovskite Nanocrystals
Amrita Dey; Junzhi Ye; Apurba De; Elke Debroye; Seung Kyun Ha; Eva Bladt; Anuraj S. Kshirsagar; Ziyu Wang; Jun Yin; Yue Wang; Li Na Quan; Fei Yan; Mengyu Gao; Xiaoming Li; Javad Shamsi; Tushar Debnath; Muhan Cao; Manuel A. Scheel; Sudhir Kumar; Julian A. Steele; Marina Gerhard; Lata Chouhan; Ke Xu; Xian-gang Wu; Yanxiu Li; Yangning Zhang; Anirban Dutta; Chuang Han; Ilka Vincon; Andrey L. Rogach; Angshuman Nag; Anunay Samanta; Brian A. Korgel; Chih-Jen Shih; Daniel R. Gamelin; Dong Hee Son; Haibo Zeng; Haizheng Zhong; Handong Sun; Hilmi Volkan Demir; Ivan G. Scheblykin; Iván Mora-Seró; Jacek K. Stolarczyk; Jin Z. Zhang; Jochen Feldmann; Johan Hofkens; Joseph M. Luther; Julia Pérez-Prieto; Liang Li; Liberato Manna; Maryna I. Bodnarchuk; Maksym V. Kovalenko; Maarten B. J. Roeffaers; Narayan Pradhan; Omar F. Mohammed; Osman M. Bakr; Peidong Yang; Peter Müller-Buschbaum; Prashant V. Kamat; Qiaoliang Bao; Qiao Zhang; Roman Krahne; Raquel E. Galian; Samuel D. Stranks; Sara Bals; Vasudevanpillai Biju; William A. Tisdale; Yong Yan; Robert L. Z. Hoye; Lakshminarayana Polavarapu
ACS Nano, 15, 7, 10775, 10981, American Chemical Society (ACS), 2021年07月27日, [査読有り]
研究論文(学術雑誌) - Shape‐Dependent Kinetics of Halide Vacancy Filling in Organolead Halide Perovskites
Takuya Okamoto; Md. Shahjahan; Vasudevanpillai Biju
Advanced Optical Materials, 2100355, 2100355, 2021年06月18日, [査読有り], [筆頭著者, 最終著者, 責任著者]
英語, 研究論文(学術雑誌) - Real-Time Blinking Suppression of Perovskite Quantum Dots by Halide Vacancy Filling
Lata Chouhan; Syoji Ito; Elizabeth Mariam Thomas; Yuta Takano; Sushant Ghimire; Hiroshi Miyasaka; Vasudevanpillai Biju
ACS Nano, 15, 2, 2831, 2838, American Chemical Society (ACS), 2021年02月23日, [査読有り], [責任著者]
英語, 研究論文(学術雑誌) - Heterojunction Perovskite Microrods Prepared by Remote‐Controlled Vacancy Filling and Halide Exchange
Md Shahjahan; Ken‐ichi Yuyama; Takuya Okamoto; Vasudevanpillai Biju
Advanced Materials Technologies, 6, 2, 2000934, 2000934, 2021年02月, [査読有り], [責任著者]
英語, 研究論文(学術雑誌) - Photoluminescence investigations of sulfur quantum dots synthesized by a bubbling-assisted strategy
Shuo Liu; Henggang Wang; Anrui Feng; Jianyu Chang; Chuanchuan Zhang; Yu-e Shi; Yongqing Zhai; Vasudevanpillai Biju; Zhenguang Wang
Nanoscale Advances, 3, 14, 4271, 4275, Royal Society of Chemistry (RSC), 2021年
研究論文(学術雑誌),The photoluminescence mechanisms of S-dots were revealed by the bubbling-assisted synthesis and spectroscopic study. The emission color of the S-dots depends on the size, and the emission efficiency is affected by the surface sulfur species.
- Correction to Blinking Suppression in Highly Excited CdSe/ZnS Quantum Dots by Electron Transfer under Large Positive Gibbs (Free) Energy Change
Elizabeth Mariam Thomas; Sushant Ghimire; Reiko Kohara; Ajith Nair Anil; Ken-ichi Yuyama; Yuta Takano; K. George Thomas; Vasudevanpillai Biju
ACS Nano, 14, 10, 14250, 14250, American Chemical Society (ACS), 2020年09月18日
研究論文(学術雑誌) - Photoluminescent Ozone Sensor with Enhanced Sensitivity by Using CdSe/ZnS Quantum Dots Modified with Gold and Platinum
Masanori ANDO; Kosuke INAGAKI; Hideya KAWASAKI; Vasudevanpillai BIJU; Yasushi SHIGERI
Analytical Sciences, 36, 8, 989, 995, Japan Society for Analytical Chemistry, 2020年08月10日, [国際誌]
英語, 研究論文(学術雑誌), We report photoluminescence-based ozone sensing using composite films composed of gold or platinum and red-emitting CdSe/ZnS core-shell quantum dots. The sensing efficiency of quantum dots is enhanced by the addition of noble metals. The composite films undergo reversible changes in photoluminescence intensity (measured at excitation/emission wavelengths of 365/652 - 659 nm) in the presence of ppm levels of ozone in air at 25°C and at atmospheric pressure. The sensitivity of the composite films does not saturate with ozone in the 0.5 - 200 ppm concentration range. When compared with a quantum dot-only film, the composite films show higher sensitivities to 0.5 ppm ozone of 27% (gold) and 43% (platinum). When compared with a quantum dot-only film, the photoluminescence of the gold- or platinum-palladium alloy-based film recovers faster after the removal of ozone in the surrounding atmosphere. Thus, platinum- or gold-conjugated quantum-dot films form sensor modules for the reversible and highly sensitive detection of ozone under the tested ambient conditions. - Spatio-temporally-controlled synthesis of lead halide perovskite crystals by laser trapping
Ken-ichi Yuyama; Islam Md Jahidul; Vasudevanpillai Biju
Optical Manipulation and Structured Materials Conference 2020, SPIE, 2020年06月15日
研究論文(国際会議プロシーディングス) - 光増感分子rTPAを搭載したミトコンドリア標的型ナノカプセルの構築および担癌モデルマウスを用いた癌光治療戦略の検証
山田 勇磨; Satrialdi; 高野 勇太; Biju Vasudevanpillai; 原島 秀吉
日本薬学会年会要旨集, 140年会, 26X, am11, (公社)日本薬学会, 2020年03月
日本語 - Remote tuning of bandgap and emission of lead perovskites by spatially controlled halide exchange reactions
Md Jahidul Islam; Md Shahjahan; Ken-ichi Yuyama; Vasudevanpillai Biju
ACS Materials Letters, 2, 4, 403, 408, American Chemical Society (ACS), 2020年02月, [査読有り]
英語, 研究論文(学術雑誌) - The Confinement and Migration of Charge-Carriers in Lead Halide Perovskites
Sushant Ghimire; Lata Chouhan; Vasudevanpillai Biju
Photosynergetic Responses in Molecules and Molecular Aggregates, 197, 210, Springer Singapore, 2020年
論文集(書籍)内論文 - SPR induced photoluminescne quenching in Quantum MAPbBr3 -QD/TiO2 inteface
Katta Venkata Seshaiah; Lata Chouhan; Vasudevanpillai Biju; Sai Santhosh Kumar Raavi
OSA Advanced Photonics Congress (AP) 2020 (IPR, NP, NOMA, Networks, PVLED, PSC, SPPCom, SOF), OSA, 2020年
研究論文(国際会議プロシーディングス) - Synthesis, optoelectronic properties and applications of halide perovskites
Lata Chouhan; Sushant Ghimire; Challapalli Subrahmanyam; Tsutomu Miyasaka; Vasudevanpillai Biju
Chemical Society Reviews, 49, 10, 2869, 2885, Royal Society of Chemistry (RSC), 2020年, [査読有り]
英語, 研究論文(学術雑誌),Halide perovskites have emerged as a class of most promising and cost-effective semiconductor materials for next generation photoluminescent, electroluminescent and photovoltaic devices.
- Toxicity of nanomaterials due to photochemical degradation and the release of heavy metal ions
Jeladhara Sobhanan; Philip Jones; Reiko Kohara; Sakiko Sugino; Martin Vacha; Challapally Subrahmanyam; Yuta Takano; Fred Lacy; Vasudevanpillai Biju
Nanoscale, 12, 43, 22049, 22058, Royal Society of Chemistry (RSC), 2020年, [査読有り]
英語, 研究論文(学術雑誌),The cytotoxicity and genotoxicity of PbS quantum dots by photochemical etching and the release of lead ions.
- Near-infrared light control of membrane potential by an electron donor–acceptor linked molecule
Yuta Takano; Kazuaki Miyake; Jeladhara Sobhanan; Vasudevanpillai Biju; Nikolai V. Tkachenko; Hiroshi Imahori
Chemical Communications, 56, 83, 12562, 12565, Royal Society of Chemistry (RSC), 2020年, [査読有り]
英語, 研究論文(学術雑誌),(π-Extended porphyrin)–fullerene linked molecules are synthesized to utilize the molecular excited states induced by near-infrared light. One of the molecules successfully alters the membrane potential.
- A photoanode with plasmonic nanoparticles of earth abundant bismuth for photoelectrochemical reactions
Palyam Subramanyam; Melepurath Deepa; Sai Santosh Kumar Raavi; Hiroaki Misawa; Vasudevanpillai Biju; Challapalli Subrahmanyam
Nanoscale Advances, 2, 12, 5591, 5599, Royal Society of Chemistry (RSC), 2020年, [査読有り], [責任著者]
英語, 研究論文(学術雑誌),A wide range of technologies has been developed for producing hydrogen economically and in greener ways.
- Extinction of Antimicrobial Resistant Pathogens Using Silver Embedded Silica Nanoparticles and an Efflux Pump Blocker
Jiya Jose; Abdulaziz Anas; Bina Jose; Anand B. Puthirath; Sujith Athiyanathil; Chekidhenkuzhiyil Jasmin; M. R. Anantharaman; Shanta Nair; Challapalli Subrahmanyam; Vasudevanpillai Biju
ACS Applied Bio Materials, 2, 11, 4681, 4686, American Chemical Society (ACS), 2019年11月18日
研究論文(学術雑誌) - Mixed-halide perovskite synthesis by chemical reaction and crystal nucleation under an optical potential
Md Jahidul Islam; Ken-ichi Yuyama; Kiyonori Takahashi; Takayoshi Nakamura; Katsuaki Konishi; Vasudevanpillai Biju
NPG Asia Materials, 11, 31, 2019年06月, [査読有り]
英語, 研究論文(学術雑誌) - Blinking Beats Bleaching: The Control of Superoxide Generation by Photo‐ionized Perovskite Nanocrystals
Lata Chouhan; Sushant Ghimire; Vasudevanpillai Biju
Angewandte Chemie International Edition, 58, 15, 4875, 4879, Wiley, 2019年04月
研究論文(学術雑誌) - Photoinduced Photoluminescence Enhancement in Self-assembled Clusters of Formamidinium Lead Bromide Perovskite Nanocrystals
Sushant Ghimire; Vijayakumar C Nair; Chinnadurai Muthu; Ken-ichi Yuyama; Martin Vacha; Vasudevanpillai Biju
Nanoscale, 11, 19, 9335, 9340, Royal Society of Chemistry (RSC), 2019年03月, [査読有り]
英語, 研究論文(学術雑誌),Delayed recombination of photogenerated charge carriers or excitons is accomplished in self-assemblies of perovskite nanocrystals.
- Phase transfer reaction for the preparation of stable polymer-quantum dot conjugates
Geethy P Gopalan; Ajith Nair Anil; Sushant Ghimire; Nidhin Joy; Ken-ichi Yuyama; Vasudevanpillai Biju; Raju Francis
Journal of Photochemistry and Photobiology A: Chemistry, 371, 91, 97, Elsevier BV, 2019年02月, [査読有り]
英語, 研究論文(学術雑誌) - The optimization of cancer photodynamic therapy by utilization of a pi-extended porphyrin-type photosensitizer in combination with MITO-Porter
Satrialdi; Reina Munechika; Vasudevanpillai Biju; Yuta Takano; Hideyoshi Harashima; Yuma Yamada
Chemical Communications, 2019年, [査読有り]
英語, 研究論文(学術雑誌) - Photoinduced Betaine Generation for the Efficient Photothermal Energy Conversion
Devika Sasikumar; Yuta Takano; Vasudevanpillai Biju
Chemistry A European Journal, 2019年, [査読有り]
英語, 研究論文(学術雑誌) - Nonradiative Energy Transfer through Distributed Bands in Piezochemically-synthesized Cesium and Formamidinium Lead Halide Perovskites
Sankaramangalam Balachandran Bhagyalakshmi; Sushant Ghimire; Kiyonari Takahashi; Ken-ichi Yuyama; Yuta Takano; Takayoshi Nakamura; Vasudevan Biju
Chemistry A European Journal, 26, 10, 2133, 2137, Wiley, 2019年, [査読有り]
英語, 研究論文(学術雑誌) - Photon-recycling by Energy Transfer in Piezochemically Synthesized and Close-packed Methyl Ammonium Lead Halide Perovskites
Sushant Ghimire; Kiyonori Takahashi; Yuta Takano; Takayoshi Nakamura; Vasudevanpillai Biju
Journal of Physical Chemistry C, 123, 45, 27752, 27758, 2019年, [査読有り]
英語, 研究論文(学術雑誌) - Kinetics of singlet oxygen sensing using 9-substituted anthracene derivatives #
Devika Sasikumar; Reiko Kohara; Yuta Takano; Ken-ichi Yuyama; Vasudevanpillai Biju
Journal of Chemical Sciences, 131, 1, 5, 5, Springer Science and Business Media LLC, 2019年01月, [査読有り]
英語, 研究論文(学術雑誌) - Stark Effect and Environment Induced Modulation of Emission in Single Halide Perovskite Nanocrystals
Dharmendar Kumar Sharma; Shuzo Hirata; Vasudevanpillai Biju; Martin Vacha
ACS nano, 13, 1, 624, 632, 2019年01月, [査読有り]
英語, 研究論文(学術雑誌) - Amplified and Multicolor Emission from Films and Interfacial Layers of Lead Halide Perovskite Nanocrystals
Sushant Ghimire; Lata Chouhan; Yuta Takano; Kiyonori Takahashi; Takayoshi Nakamura; Vasudevan Pillai Biju; Kenichi Yuyama
ACS Energy Letters, 2018年11月, [査読有り]
英語, 研究論文(学術雑誌) - Excitons and Biexciton Dynamics in Single CsPbBr3 Perovskite Quantum Dots
Bin Li,He Huang; Guofeng Zhang; Changgang Yang; Wenli Guo; Ruiyun Chen; Qin Chengbing; Yan Gao; Vasudevan Pillai Biju; Andrey L Rogach; Liantuan Xiao; Suotang Jia
The journal of physical chemistry letters, 9, 6934, 6940, 2018年11月, [査読有り]
英語, 研究論文(学術雑誌) - Crystallization of Methylammonium Lead Halide Perovskites by Optical Trapping
Vasudevan BIJU; Ken-ichi Yuyama; Md Jahidul Islam; Kiyonori Takahashi; Takayoshi Nakamura
Angewandte Chemie, 2018年08月, [査読有り]
英語, 研究論文(学術雑誌) - Blinking Suppression in Highly-Excited CdSe/ZnS Quantum Dots by Electron Transfer under Large Positive Gibbs (Free) Energy Change
Elizabeth Mariam Thomas; Sushant Ghimire; Reiko Kohara; Ajith Nair Anil; Ken-ichi Yuyama; Yuta Takano; K George Thomas; Vasudevan Pillai Biju
ACS nano, 12, 9, 9060, 9069, American Chemical Society (ACS), 2018年08月, [査読有り]
英語, 研究論文(学術雑誌) - Quantum dot–polymer conjugates for stable luminescent displays
S Ghimire; A Sivadas; K Yuyama; Y Takano; R Francis; V Biju
Nanoscale, 10, 28, 13368, 13374, Royal Society of Chemistry (RSC), 2018年04月, [査読有り]
英語, 研究論文(学術雑誌),The broad absorption of light in the UV-Vis-NIR region and the size-based tunable photoluminescence color of semiconductor quantum dots make these tiny crystals one of the most attractive antennae in solar cells and phosphors in electrooptical devices.
- Relations of exciton dynamics in quantum dots to photoluminescence, lasing, and energy harvesting
Sushant Ghimire; Vasudevanpillai Biju
Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 34, 137, 151, Elsevier B.V., 2018年03月01日, [査読有り]
英語, 研究論文(学術雑誌) - Preface for special issue on photosynergetics
Vasudevanpillai Biju; Tadashi Mori; Tsuyoshi Asahi; Hiroshi Miyasaka
Journal of Photochemistry and Photobiology C: Photochemistry Reviews, 34, 1, 2018年03月, [査読有り] - Quantum Dot-Peptide Nanoassembly on Mesoporous Silica Nanoparticle for Biosensing
Sreenadh Sasidharan Pillai; Hiroshi Yukawa; Daisuke Onoshima; Vasudevanpillai Biju; Yoshinobu Baba
Nano Hybrids and Composites, 19, 55, 72, 2018年02月, [査読有り]
英語, 研究論文(学術雑誌) - Development of technologies for sensing ozone in ambient air
Masanori Ando; Vasudevanpillai Biju; Yasushi Shigeri
Analytical Sciences, 34, 3, 263, 271, 2018年, [査読有り]
英語, 研究論文(学術雑誌) - OS1.3 - Optical Ozone Sensing by Composite Films of Noble Metals and CdSe/ZnS Quantum Dots
M. Ando; V. Biju; H. Kawasaki; Y. Shigeri
Proceedings IMCS 2018, AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2018年
研究論文(国際会議プロシーディングス) - Optical control of mitochondrial reductive reactions in living cells using an electron donor-acceptor linked molecule
Yuta Takano; Reina Munechika; Vasudevanpillai Biju; Hideyoshi Harashima; Hiroshi Imahori; Yuma Yamada
NANOSCALE, 9, 47, 18690, 18698, 2017年12月, [査読有り]
英語, 研究論文(学術雑誌) - Optical control of mitochondrial reductive reactions in living cells using an electron donor–acceptor linked molecule
Yuta Takano; Reina Munechika; Vasudevanpillai Biju; Hideyoshi Harashima; Hiroshi Imahori; Yuma Yamada
Nanoscale, 9, 47, 18690, 18698, 2017年12月, [査読有り]
英語, 研究論文(学術雑誌) - Blue-Emitting Electron-Donor/Acceptor Dyads for Naked-Eye Fluorescence Detection of Singlet Oxygen
Kohara Reiko; Yuyama Ken-ichi; Shigeri Yasushi; Biju Vasudevanpillai
CHEMPHOTOCHEM, 1, 7, 298, 298, 2017年07月, [査読有り]
英語 - Reversible photoluminescence sensing of gaseous alkylamines using CdSe-based quantum dots
Masanori Ando; Takuya Kamimura; Koichi Uegaki; Vasudevanpillai Biju; Jennifer T. Damasco Ty; Yasushi Shigeri
SENSORS AND ACTUATORS B-CHEMICAL, 246, 1074, 1079, 2017年07月, [査読有り]
英語, 研究論文(学術雑誌) - Blue‐Emitting Electron‐Donor/Acceptor Dyads for Naked‐Eye Fluorescence Detection of Singlet Oxygen
Reiko Kohara; Ken‐ichi Yuyama; Yasushi Shigeri; Vasudevanpillai Biju
ChemPhotoChem, 1, 7, 299, 303, 2017年07月, [査読有り]
英語, 研究論文(学術雑誌) - Influence of Zn on the photoluminescence of colloidal (AgIn)(x)Zn2(1-x) S-2 nanocrystals
Dharmendar Kumar Sharma; Shuzo Hirata; Lukasz Bujak; Vasudevanpillai Biju; Tatsuya Kameyama; Marino Kishi; Tsukasa Torimoto; Martin Vacha
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 19, 5, 3963, 3969, 2017年02月, [査読有り]
英語, 研究論文(学術雑誌) - Forster Resonance Energy Transfer Mediated Photoluminescence Quenching in Stoichiometrically Assembled CdSe/ZnS Quantum Dot-Peptide Labeled Black Hole Quencher Conjugates for Matrix Metalloproteinase-2 Sensing
Sreenadh Sasidharan Pillavi; Hiroshi Yukawa; Daisuke Onoshima; Vasudevanpillai Biju; Yoshinobu Baba
ANALYTICAL SCIENCES, 33, 2, 137, 142, 2017年02月, [査読有り]
英語, 研究論文(学術雑誌) - Influence of Zn on the photoluminescence of colloidal (AgIn) x Zn 2 (1− x) S 2 nanocrystals
Dharmendar Kumar Sharma; Shuzo Hirata; Lukasz Bujak; Vasudevanpillai Biju; Tatsuya Kameyama; Marino Kishi; Tsukasa Torimoto; Martin Vacha
Physical Chemistry Chemical Physics, 19, 5, 3963, 3969, 2017年02月, [査読有り]
英語, 研究論文(学術雑誌) - In vivo ROS production and use of oxidative stress-derived biomarkers to detect the onset of diseases such as Alzheimer’s disease, Parkinson’s disease, and diabetes
Aya Umeno; Vasudevanpillai Biju; Yasukazu Yoshida
Free radical research, 51, 4, 413, 427, 2017年, [査読有り]
英語, 研究論文(学術雑誌) - Channeling Exciton Migration into Electron Transfer in Formamidinium Lead Bromide Perovskite Nanocrystal/Fullerene Composites
Vijayakumar C. Nair; Chinnadurai Muthu; Andrey L. Rogach; Reiko Kohara; Vasudevanpillai Biju
Angewandte Chemie, 129, 5, 1234, 1238, Wiley, 2016年12月30日, [査読有り], [筆頭著者, 最終著者, 責任著者]
研究論文(学術雑誌), Abstract
Hydrophobically capped nanocrystals of formamidinium lead bromide (FAPbBr3) perovskite (PNC) show bright and stable fluorescence in solution and thin‐film states. When compared with isolated PNCs in a solution, close‐packed PNCs in a thin film show extended fluorescence lifetime (ca. 4.2 μs), which is due to hopping or migration of photogenerated excitons among PNCs. Both fluorescence quantum efficiency and lifetime decrease in a PNC thin film doped with fullerene (C60), which is attributed to channeling of exciton migration into electron transfer to C60. On the other hand, quenching of fluorescence intensity of a PNC solution is not accompanied by any change in fluorescence lifetime, indicating static electron transfer to C60 adsorbed onto the hydrophobic surface of individual PNCs. Exciton migration among close‐packed PNCs and electron transfer to C60 places C60‐doped PNC thin films among cost‐effective antenna systems for solar cells. - Sensing of ozone based on its quenching effect on the photoluminescence of CdSe-based core-shell quantum dots
Masanori Ando; Takuya Kamimura; Koichi Uegaki; Vasudevanpillai Biju; Yasushi Shigeri
MICROCHIMICA ACTA, 183, 11, 3019, 3024, 2016年11月, [査読有り]
英語, 研究論文(学術雑誌) - Latest impact factor
Martin Vacha; Jong-Hyun Ahn; Vasudevan Pillai Biju; Tomoyasu Taniyama; Ikuyoshi Tomita; Shutao Wang; Jihui Yang
NPG ASIA MATERIALS, 8, 2016年07月, [査読有り]
英語 - Intracellular accumulation of indium ions released from nanoparticles induces oxidative stress, proinflammatory response and DNA damage
Yosuke Tabei; Akinari Sonoda; Yoshihiro Nakajima; Vasudevanpillai Biju; Yoji Makita; Yasukazu Yoshida; Masanori Horie
JOURNAL OF BIOCHEMISTRY, 159, 2, 225, 237, 2016年02月, [査読有り]
英語, 研究論文(学術雑誌) - Fluorescence detection of the pathogenic bacteria Vibrio harveyi in solution and animal cells using semiconductor quantum dots
Esha Arshad; Abdulaziz Anas; Aparna Asok; C. Jasmin; Somnath S. Pai; I. S. Bright Singh; A. Mohandas; Vasudevanpillai Biju
RSC ADVANCES, 6, 19, 15686, 15693, 2016年, [査読有り]
英語, 研究論文(学術雑誌) - Single-particle spectroscopy of I-III-VI semiconductor nanocrystals: spectral diffusion and suppression of blinking by two-color excitation
Dharmendar Kumar Sharma; Shuzo Hirata; Lukasz Bujak; Vasudevanpillai Biju; Tatsuya Kameyama; Marino Kishi; Tsukasa Torimoto; Martin Vacha
NANOSCALE, 8, 28, 13687, 13694, 2016年, [査読有り]
英語, 研究論文(学術雑誌) - Fluorescence Quenching of CdSe/ZnS Quantum Dots by Using Black Hole Quencher Molecules Intermediated With Peptide for Biosensing Application.
Sreenadh Sasidharan Pillai; Hiroshi Yukawa; Daisuke Onoshima; Vasudevanpillai Biju; Yoshinobu Baba
Cell medicine, 8, 1-2, 57, 62, 2015年12月17日, [査読有り], [国際誌]
英語, 研究論文(学術雑誌) - Fluctuating single sp(2) carbon clusters at single hotspots of silver nanoparticle dimers investigated by surface-enhanced resonance Raman scattering
Tamitake Itoh; Yuko S. Yamamoto; Vasudevanpillai Biju; Hiroharu Tamaru; Shin-ichi Wakida
AIP ADVANCES, 5, 12, 2015年12月, [査読有り]
英語, 研究論文(学術雑誌) - Auger Ionization Beats Photo-Oxidation of Semiconductor Quantum Dots: Extended Stability of Single-Molecule Photoluminescence
Shin-ichi Yamashita; Morihiko Hamada; Shunsuke Nakanishi; Hironobu Saito; Yoshio Nosaka; Shin-ichi Wakida; Vasudevanpillai Biju
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 54, 13, 3892, 3896, 2015年03月, [査読有り]
英語, 研究論文(学術雑誌) - In vitro evaluation of the cellular effect of indium tin oxide nanoparticles using the human lung adenocarcinoma A549 cells
Yosuke Tabei; Akinari Sonoda; Yoshihiro Nakajima; Vasudevanpillai Biju; Yoji Makita; Yasukazu Yoshida; Masanori Horie
METALLOMICS, 7, 5, 816, 827, 2015年, [査読有り]
英語, 研究論文(学術雑誌) - Nanoparticles speckled by ready-to-conjugate lanthanide complexes for multimodal imaging
Vasudevanpillai Biju; Morihiko Hamada; Kenji Ono; Sakiko Sugino; Takashi Ohnishi; Edakkattuparambil Sidharth Shibu; Shohei Yamamura; Makoto Sawada; Shunsuke Nakanishi; Yasushi Shigeri; Shin-ichi Wakida
NANOSCALE, 7, 36, 14829, 14837, 2015年, [査読有り]
英語, 研究論文(学術雑誌) - Single-molecular surface-enhanced resonance Raman scattering as a quantitative probe of local electromagnetic field: The case of strong coupling between plasmonic and excitonic resonance
Tamitake Itoh; Yuko S. Yamamoto; Hiroharu Tamaru; Vasudevanpillai Biju; Shin-ichi Wakida; Yukihiro Ozaki
PHYSICAL REVIEW B, 89, 19, 2014年05月, [査読有り]
英語, 研究論文(学術雑誌) - Photoluminescence of CdSe and CdSe/ZnS quantum dots: Modifications for making the invisible visible at ensemble and single-molecule levels
Edakkattuparambil S. Shibu; Morihiko Hamada; Shunsuke Nakanishi; Shin-ichi Wakida; Vasudevanpillai Biju
COORDINATION CHEMISTRY REVIEWS, 263, 2, 12, 2014年03月, [査読有り]
英語 - In Situ Photochemical Surface Passivation of CdSe/ZnS Quantum Dots for Quantitative Light Emission and Enhanced Photocurrent Response in Solar Cells
Morihiko Hamada; Norifumi Takenokoshi; Keiji Matozaki; Qi Feng; Norio Murase; Shin-ichi Wakida; Shunsuke Nakanishi; Vasudevanpillai Biju
JOURNAL OF PHYSICAL CHEMISTRY C, 118, 4, 2178, 2186, 2014年01月, [査読有り]
英語, 研究論文(学術雑誌) - SERS microscopic imaging as novel tool for assessing viability and enumerating yeast cells at various stages of cell cycle in lag, log, exponential and stationary phases of growth in culture
Manikantan Syamala Kiran; Tamitake Itoh; Hiroko Abe; Yasuko Fujita; Kazuya Tomimoto; Vasudevanpillai Biju; Sajani Kavitha; Arumugham Ganamani; Mitsuru Ishikawa
JOURNAL OF EXPERIMENTAL NANOSCIENCE, 9, 10, 1003, 1014, 2014年, [査読有り]
英語, 研究論文(学術雑誌) - Chemical modifications and bioconjugate reactions of nanomaterials for sensing, imaging, drug delivery and therapy
Vasudevanpillai Biju
CHEMICAL SOCIETY REVIEWS, 43, 3, 744, 764, 2014年, [査読有り]
英語 - Photouncaging Nanoparticles for MRI and Fluorescence Imaging in Vitro and in Vivo
Edakkattuparambil S. Shibu; Kenji Ono; Sakiko Sugino; Ayami Nishioka; Akikazu Yasuda; Yasushi Shigeri; Shin-ichi Wakida; Makoto Sawada; Vasudevanpillai Biju
ACS NANO, 7, 11, 9851, 9859, 2013年11月, [査読有り]
英語, 研究論文(学術雑誌) - Singlet-Oxygen-Sensitizing Near-Infrared-Fluorescent Multimodal Nanoparticles
Edakkattuparambil Sidharth Shibu; Sakiko Sugino; Kenji Ono; Hironobu Saito; Ayama Nishioka; Shohei Yamamura; Makoto Sawada; Yoshio Nosaka; Vasudevanpillai Biju
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 52, 40, 10559, 10563, 2013年09月, [査読有り]
英語, 研究論文(学術雑誌) - Single Quantum Dot Tracking Reveals that an Individual Multivalent HIV-1 Tat Protein Transduction Domain Can Activate Machinery for Lateral Transport and Endocytosis
Yasuhiro Suzuki; Chandra Nath Roy; Warunya Promjunyakul; Hiroyasu Hatakeyama; Kohsuke Gonda; Junji Imamura; Biju Vasudevanpillai; Noriaki Ohuchi; Makoto Kanzaki; Hideo Higuchi; Mitsuo Kaku
MOLECULAR AND CELLULAR BIOLOGY, 33, 15, 3036, 3049, 2013年08月, [査読有り]
英語, 研究論文(学術雑誌) - Effects of Interactions with Cyclic Solvent Molecules on Optical Dephasing of CdSe/ZnS Colloidal Quantum Dots Detected by Femtosecond Four-Wave Mixing Spectroscopy
Yusuke Hirosawa; Hiroyoshi Kouzai; Naoya Yamazaki; Hayato Miyagawa; Noriaki Tsurumachi; Shun Koshiba; Shunsuke Nakanishi; VasudevanPillai Biju; Mituru Ishikawa
JAPANESE JOURNAL OF APPLIED PHYSICS, 52, 7, 2013年07月, [査読有り]
英語, 研究論文(学術雑誌) - Excitation laser energy dependence of surface-enhanced fluorescence showing plasmon-induced ultrafast electronic dynamics in dye molecules
Tamitake Itoh; Yuko S. Yamamoto; Hiroharu Tamaru; Vasudevanpillai Biju; Norio Murase; Yukihiro Ozaki
PHYSICAL REVIEW B, 87, 23, 2013年06月, [査読有り]
英語, 研究論文(学術雑誌) - Nanomaterials formulations for photothermal and photodynamic therapy of cancer
Edakkattuparambil Sidharth Shibu; Morihiko Hamada; Norio Murase; Vasudevanpillai Biju
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS, 15, 53, 72, 2013年06月, [査読有り]
英語 - Dynamic Interactions of CdSe/Zns Quantum Dots with Cyclic Solvents Probed by Femtosecond Four-Wave Mixing
Y. Hirosawa; H. Kouzai; H. Miyagawa; N. Tsurumachi; S. Koshiba; S. Nakanishi; V. Biju; M. Ishikawa
XVIIITH INTERNATIONAL CONFERENCE ON ULTRAFAST PHENOMENA, 41, 04036, 04036, 2013年, [査読有り]
英語, 研究論文(国際会議プロシーディングス) - Impairments of cells and genomic DNA by environmentally transformed engineered nanomaterials
Philip Jones; Sakiko Sugino; Shohei Yamamura; Fred Lacy; Vasudevanpillai Biju
Nanoscale, 5, 20, 9511, 9511, Royal Society of Chemistry (RSC), 2013年, [査読有り], [筆頭著者, 最終著者, 責任著者]
研究論文(学術雑誌) - Energy materials: supramolecular nanoparticles for solar energy harvesting
E. S. Shibu; A. Sonoda; Z. Tao; Q. Feng; A. Furube; S. Masuo; L. Wang; N. Tamai; M. Ishikawa; V. Biju
Nano Reviews, 4, 1, 21079, 21079, Informa UK Limited, 2013年01月, [査読有り], [筆頭著者, 最終著者, 責任著者]
研究論文(学術雑誌) - Inhibition Assay of Yeast Cell Walls by Plasmon Resonance Rayleigh Scattering and Surface-Enhanced Raman Scattering Imaging
Kiran Manikantan Syamala; Hiroko Abe; Yasuko Fujita; Kazuya Tomimoto; Vasudevanpillai Biju; Mitsuru Ishikawa; Yukihiro Ozaki; Tamitake Itoh
LANGMUIR, 28, 24, 8952, 8958, 2012年06月, [査読有り]
英語, 研究論文(学術雑誌) - FRET from Quantum Dots to Photodecompose Undesired Acceptors and Report the Condensation and Decondensation of Plasmid DNA
Vasudevanpillai Biju; Abdulaziz Anas; Hidetaka Akita; Edakkattuparambil Sidharthan Shibu; Tamitake Itoh; Hideyoshi Harashima; Mitsuru Ishikawa
ACS NANO, 6, 5, 3776, 3788, 2012年05月, [査読有り]
英語, 研究論文(学術雑誌) - Photofabrication of Fullerene-Shelled Quantum Dots Supramolecular Nanoparticles for Solar Energy Harvesting
Edakkattuparambil Sidharth Shibu; Akinari Sonoda; Zhuoqiz Tao; Qi Feng; Akihiro Furube; Sadahiro Masuo; Li Wang; Naoto Tamai; Mitsuru Ishikawa; Vasudevanpillai Biju
ACS NANO, 6, 2, 1601, 1608, 2012年02月, [査読有り]
英語, 研究論文(学術雑誌) - Quantitative evaluation of blinking in surface enhanced resonance Raman scattering and fluorescence by electromagnetic mechanism
Tamitake Itoh; Mitsuhiro Iga; Hiroharu Tamaru; Ken-ichi Yoshida; Vasudevanpillai Biju; Mitsuru Ishikawa
JOURNAL OF CHEMICAL PHYSICS, 136, 2, 2012年01月, [査読有り]
英語, 研究論文(学術雑誌) - Quantitative analysis of condensation/decondensation status of pDNA in the nuclear sub-domains by QD-FRET
Sharif M. Shaheen; Hidetaka Akita; Atsushi Yamashita; Ryo Katoono; Nobuhiko Yui; Vasudevanpillai Biju; Mitsuru Ishikawa; Hideyoshi Harashima
NUCLEIC ACIDS RESEARCH, 39, 7, E48, U108, 2011年04月, [査読有り]
英語, 研究論文(学術雑誌) - Experimental demonstration of the electromagnetic mechanism underlying surface enhanced Raman scattering using single nanoparticle spectroscopy
Tamitake Itoh; Ken-ichi Yoshida; Hiroharu Tamaru; Vasudevanpillai Biju; Mitsuru Ishikawa
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 219, 2-3, 167, 179, 2011年04月, [査読有り]
英語, 研究論文(学術雑誌) - Quantitative analysis of condensation/decondensation status of pDNA in the nuclear sub-domains by QD-FRET.
Sharif M Shaheen; Hidetaka Akita; Atsushi Yamashita; Ryo Katoono; Nobuhiko Yui; Vasudevanpillai Biju; Mitsuru Ishikawa; Hideyoshi Harashima
Nucleic Acids Res., 39, 7, e48, e48, 2011年04月, [査読有り]
英語, 研究論文(学術雑誌), Recent studies indicate that controlling the nuclear decondensation and intra-nuclear localization of plasmid DNA (pDNA) would result in an increased transfection efficiency. In the present study, we established a technology for imaging the nuclear condensation/decondensation status of pDNA in nuclear subdomains using fluorescence resonance energy transfer (FRET) between quantum dot (QD)-labeled pDNA as donor, and rhodamine-labeled polycations as acceptor. The FRET-occurring pDNA/polycation particle was encapsulated in a nuclear delivery system; a tetra-lamellar multifunctional envelope-type nano device (T-MEND), designed to overcome the endosomal membrane and nuclear membrane via step-wise fusion. Nuclear subdomains (i.e. heterochromatin and euchromatin) were distinguished by Hoechst33342 staining. Thereafter, Z-series of confocal images were captured by confocal laser scanning microscopy. pDNA in condensation/decondensation status in heterochromatin or euchromatin were quantified based on the pixel area of the signals derived from the QD and rhodamine. The results obtained indicate that modulation of the supra-molecular structure of polyrotaxane (DMAE-ss-PRX), a condenser that is - Bioconjugated quantum dots for cancer research: Present status, prospects and remaining issues (vol 28, pg 199, 2010)
Vasudevanpillai Biju; Sathish Mundayoor; Ramakrishnapillai V. Omkumar; Abdulaziz Anas; Mitsuru Ishikawa
BIOTECHNOLOGY ADVANCES, 29, 2, 259, 260, 2011年03月, [査読有り]
英語 - Quantitative evaluation of electromagnetic enhancement in surface-enhanced resonance Raman scattering from plasmonic properties and morphologies of individual Ag nanostructures (vol 81, 115406, 2010)
Ken-ichi Yoshida; Tamitake Itoh; Hiroharu Tamaru; Vasudevanpillai Biju; Mitsuru Ishikawa; Yukihiro Ozaki
PHYSICAL REVIEW B, 83, 11, 2011年03月, [査読有り]
英語 - Luminescent Quantum Dots, Making Invisibles Visible in Bioimaging
Mitsuru Ishikawa; Vasudevanpillai Biju
NANOPARTICLES IN TRANSLATIONAL SCIENCE AND MEDICINE, 104, 53, 99, 2011年, [査読有り]
英語, 論文集(書籍)内論文 - Single-molecule photochemical reactions of Auger-ionized quantum dots.
Hamada M; Shibu ES; Itoh T; Kiran MS; Nakanishi S; Ishikawa M; Biju V
Nano reviews, 2, 2011年, [査読有り], [国際誌]
英語, 研究論文(学術雑誌), Photoinduced electron transfer in donor-acceptor systems composed of quantum dots (QDs) and electron donors or acceptors is a subject of considerable recent research interest due to the potential applications of such systems in both solar energy harvesting and degradation of organic pollutants. Herein, we employed single-molecule imaging and spectroscopy techniques for the detection of photochemical reactions between 1,4-diaminobutane (DAB) and CdSe/ZnS single QDs. We investigated the reactions by analyzing photoluminescence (PL) intensity and lifetime of QDs at ensemble and single-molecule levels. While DAB was applied to single QDs tethered on a cover slip or QDs dispersed in a solution, PL intensity of QD continuously decreased with a concomitant increase in the PL lifetime. Interestingly, these changes in the PL properties of QD were predominant under high-intensity photoactivation. We hypothesize that the above changes in the PL properties surface due to the transfer of an electron from DAB to Auger-ionized QD followed by elimination of a proton from DAB and the formation of a QD-DAB adduct. Thus, a continuous decrease in the PL intensity of QDs under high-intensity photoactivation is attributed to continuous photochemical reactions of DAB with single QDs and the formation of QD-(DAB)(n) adducts. We believe that detection and analysis of such photochemical reactions of single QDs with amines will be of considerable broad interest due to the significant impact of photoinduced electron transfer reactions in energy management and environmental remediation. - Spectral variations in background light emission of surface-enhanced resonance hyper Raman scattering coupled with plasma resonance of individual silver nanoaggregates (vol 133, 124704, 2010)
Tamitake Itoh; Hiroyuki Yoshikawa; Ken-ichi Yoshida; Vasudevanpillai Biju; Mitsuru Ishikawa
JOURNAL OF CHEMICAL PHYSICS, 133, 14, 2010年10月, [査読有り]
英語 - Spectral variations in background light emission of surface-enhanced resonance hyper Raman scattering coupled with plasma resonance of individual silver nanoaggregates
Tamitake Itoh; Hiroyuki Yoshikawa; Ken-ichi Yoshida; Vasudevanpillai Biju; Mitsuru Ishikawa
JOURNAL OF CHEMICAL PHYSICS, 133, 12, 2010年09月, [査読有り]
英語, 研究論文(学術雑誌) - Blinking Suppression in CdSe/ZnS Single Quantum Dots by TiO2 Nanoparticles
Morihiko Hamada; Shunsuke Nakanishi; Tamitake Itoh; Mitsuru Ishikawa; Vasudevanpillai Biju
ACS NANO, 4, 8, 4445, 4454, 2010年08月, [査読有り]
英語, 研究論文(学術雑誌) - Bioconjugated quantum dots for cancer research: Present status, prospects and remaining issues
Vasudevanpillai Biju; Sathish Mundayoor; Ramakrishnapillai V. Omkumar; Abdulaziz Anas; Mitsuru Ishikawa
BIOTECHNOLOGY ADVANCES, 28, 2, 199, 213, 2010年03月, [査読有り]
英語 - Quantitative evaluation of electromagnetic enhancement in surface-enhanced resonance Raman scattering from plasmonic properties and morphologies of individual Ag nanostructures
Ken-ichi Yoshida; Tamitake Itoh; Hiroharu Tamaru; Vasudevanpillai Biju; Mitsuru Ishikawa; Yukihiro Ozaki
PHYSICAL REVIEW B, 81, 11, 2010年03月, [査読有り]
英語, 研究論文(学術雑誌) - Modulatory role of versons glands peptide in insect metamorphosis
Muraleedharan Damodaran; Gayathri E. Uma; R. V. Omkumar; Vasudevanpillai Biju; Govindan Bhaskaran
ENDOCRINE JOURNAL, 57, S612, S612, 2010年03月, [査読有り]
英語 - Selective Detection of HbA1c Using Surface Enhanced Resonance Raman Spectroscopy
Manikantan Syamala Kiran; Tamitake Itoh; Ken-ichi Yoshida; Nagako Kawashima; Vasudevanpillai Biju; Mitsuru Ishikawa
ANALYTICAL CHEMISTRY, 82, 4, 1342, 1348, 2010年02月, [査読有り]
英語, 研究論文(学術雑誌) - Single-Molecule FRET Imaging for Enzymatic Reactions at High Ligand Concentrations
Mitsuhiro Sugawa; So Nishikawa; Atsuko Hikikoshi Iwane; Vasudevanpillai Biju; Toshio Yanagida
SMALL, 6, 3, 346, 350, 2010年02月, [査読有り]
英語, 研究論文(学術雑誌) - Reversible Dimerization of EGFR Revealed by Single-Molecule Fluorescence Imaging Using Quantum Dots
Nagako Kawashima; Kenichi Nakayama; Kohji Itoh; Tamitake Itoh; Mitsuru Ishikawa; Vasudevanpillai Biju
CHEMISTRY-A EUROPEAN JOURNAL, 16, 4, 1186, 1192, 2010年, [査読有り]
英語, 研究論文(学術雑誌) - Delivering quantum dots to cells: bioconjugated quantum dots for targeted and nonspecific extracellular and intracellular imaging
Vasudevanpillai Biju; Tamitake Itoh; Mitsuru Ishikawa
CHEMICAL SOCIETY REVIEWS, 39, 8, 3031, 3056, 2010年, [査読有り]
英語 - In vitro imaging of cells using peptide-conjugated quantum dots
Mitsuru Ishikawa; Vasudevanpillai Biju
COLLOIDAL QUANTUM DOTS FOR BIOMEDICAL APPLICATIONS V, 7575, 2010年, [査読有り]
英語, 研究論文(国際会議プロシーディングス) - In vitro imaging of cells using peptide-conjugated quantum dots
Mitsuru Ishikawa; Vasudevan Biju
Progress in Biomedical Optics and Imaging - Proceedings of SPIE, 7575, 2010年, [査読有り]
英語, 研究論文(国際会議プロシーディングス) - Spectral shapes of surface-enhanced resonance Raman scattering sensitive to the refractive index of media around single Ag nanoaggregates
Ken-ichi Yoshida; Tamitake Itoh; Vasudevanpillai Biju; Mitsuru Ishikawa; Yukihiro Ozaki
APPLIED PHYSICS LETTERS, 95, 26, 2009年12月, [査読有り]
英語, 研究論文(学術雑誌) - Photoluminescence of CdSe Quantum Dots: Shifting, Enhancement and Blinking
Vasudevanpillai Biju; Mitsuru Ishikawa
Molecular Nano Dynamics: Vol. I: Spectroscopic Methods and Nanostructures / Vol. II: Active Surfaces, Single Crystals and Single Biocells, 1, 293, 314, John Wiley and Sons, 2009年11月27日, [査読有り]
英語, 論文集(書籍)内論文 - Imaging the cell wall of living single yeast cells using surface-enhanced Raman spectroscopy
Athiyanathil Sujith; Tamitake Itoh; Hiroko Abe; Ken-ichi Yoshida; Manikantan S. Kiran; Vasudevanpillai Biju; Misturu Ishikawa
ANALYTICAL AND BIOANALYTICAL CHEMISTRY, 394, 7, 1803, 1809, 2009年08月, [査読有り]
英語, 研究論文(学術雑誌) - Spontaneous Adsorption on a Hydrophobic Surface Governed by Hydrogen Bonding
Fuquan Dang; Takeshi Hasegawa; Vasudevanpillai Biju; Mitsuru Ishikawa; Noritada Kaji; Takao Yasui; Yoshinobu Baba
LANGMUIR, 25, 16, 9296, 9301, 2009年08月, [査読有り]
英語, 研究論文(学術雑誌) - Clathrin-Mediated Endocytosis of Quantum Dot-Peptide Conjugates in Living Cells
Abdulaziz Anas; Tetsuya Okuda; Nagako Kawashima; Kenichi Nakayama; Tamitake Itoh; Mitsuru Ishikawa; Vasudevanpillai Biju
ACS NANO, 3, 8, 2419, 2429, 2009年08月, [査読有り]
英語, 研究論文(学術雑誌) - Surface Plasmon Excitation and Surface-Enhanced Raman Scattering Using Two-Dimensionally Close-Packed Gold Nanoparticles
Mohammad Kamal Hossain; Yasutaka Kitahama; Vasudevanpillai Biju; Tamitake Itoh; Tadaaki Kaneko; Yukihiro Ozaki
JOURNAL OF PHYSICAL CHEMISTRY C, 113, 27, 11689, 11694, 2009年07月, [査読有り]
英語, 研究論文(学術雑誌) - Evaluation of electromagnetic enhancement of surface enhanced hyper Raman scattering using plasmonic properties of binary active sites in single Ag nanoaggregates
Tamitake Itoh; Hiroyuki Yoshikawa; Kenichi Yoshida; Vasudevanpillai Biju; Mitsuru Ishikawa
JOURNAL OF CHEMICAL PHYSICS, 130, 21, 2009年06月, [査読有り]
英語, 研究論文(学術雑誌) - A Novel Technique To Investigate the Decondensation of pc-DNA3.1-luc in Nuclear Sub-Domain with QD-FRET
Sharif M. Shaheen; Hidetaka Akita; Atsushi Yamashita; Ryo Katoono; Nobuhiko Yui; Vasudevanpillai Biju; Mitsuru Ishikawa; Hideyoshi Harashima
MOLECULAR THERAPY, 17, S330, S330, 2009年05月, [査読有り]
英語 - Optical force enhanced by plasmon resonance allowing position-sensitive synthesis and immobilization of single Ag nanoparticles on glass surfaces
Tamitake Itoh; Vasudevanpillai Biju; Mitsuru Ishikawa; Syoji Ito; Hiroshi Miyasaka
APPLIED PHYSICS LETTERS, 94, 14, 2009年04月, [査読有り]
英語, 研究論文(学術雑誌) - Experimental evaluation of the twofold electromagnetic enhancement theory of surface-enhanced resonance Raman scattering
Ken-ichi Yoshida; Tamitake Itoh; Vasudevanpillai Biju; Mitsuru Ishikawa; Yukihiro Ozaki
PHYSICAL REVIEW B, 79, 8, 2009年02月, [査読有り]
英語, 研究論文(学術雑誌) - Observing the cell surface using surface enhanced raman scattering (SERS) spectroscopy
Tamitake Itoh; Hiroko Abe; Biju Vasudevan Pillai; Mitsuru Ishikawa
AIST Today (International Edition), 34, 7, 8, 2009年
英語, 研究論文(学術雑誌) - 2TP2-05 Trans-membrane delivery of semiconductor quantum dots in living cells(The 47th Annual Meeting of the Biophysical Society of Japan)
Biju Vasudevanpillai; Anas Abdulaziz; Okuda Tetsuya; Itoh Tamitake; Ishikawa Mitsuru
生物物理, 49, S48, 一般社団法人 日本生物物理学会, 2009年
英語 - 2P-071 Surface enhanced resonance raman scattering of HbA and HbA1c : Implications for diabetic diagnosis(Heme proteins,The 47th Annual Meeting of the Biophysical Society of Japan)
Kiran Manikantan Syamala; Itoh Tamitake; Yoshida Kenichi; Kawashima Nagako; Biju Vasudevanpillai; Ishikawa Mitsuru
生物物理, 49, S117, 一般社団法人 日本生物物理学会, 2009年
英語 - Semiconductor quantum dots and metal nanoparticles: syntheses, optical properties, and biological applications
Vasudevanpillai Biju; Tamitake Itoh; Abdulaziz Anas; Athiyanathil Sujith; Mitsuru Ishikawa
ANALYTICAL AND BIOANALYTICAL CHEMISTRY, 391, 7, 2469, 2495, 2008年08月, [査読有り]
英語 - Photosensitized breakage and damage of DNA by CdSe-ZnS quantum dots
AbdulAziz Anas; Hidetaka Akita; Hideyoshi Harashima; Tamitake Itoh; Mitsuru Ishikawa; Vasudevanpillai Biju
JOURNAL OF PHYSICAL CHEMISTRY B, 112, 32, 10005, 10011, 2008年08月, [査読有り]
英語, 研究論文(学術雑誌) - Relations between dewetting of polymer thin films and phase-separation of encompassed quantum dots
Ryodai Kanemoto; Abdulaziz Anas; Yusuke Matsumoto; Rintaro Ueji; Tamitake Itoh; Yoshinobu Baba; Shunsuke Nakanishi; Mitsuru Shikawa; Vasudevanpillai Biju
JOURNAL OF PHYSICAL CHEMISTRY C, 112, 22, 8184, 8191, 2008年06月, [査読有り]
英語, 研究論文(学術雑誌) - Surface enhanced Raman scattering analyses of individual silver nanoaggregates on living single yeast cell wall
Athiyanathil Sujith; Tamitake Itoh; Hiroko Abe; Abdul Aziz Anas; Kenichi Yoshida; Vasudevanpillai Biju; Mitsuru Ishikawa
APPLIED PHYSICS LETTERS, 92, 10, 2008年03月, [査読有り]
英語, 研究論文(学術雑誌) - Photoluminescence quenching and intensity fluctuations of CdSe-ZnS quantum dots on an Ag nanoparticle film
Yuusuke Matsumoto; Ryodai Kanemoto; Tamitake Itoh; Shunsuke Nakanishi; Mitsuru Ishikawa; Vasudevanpillai Biju
JOURNAL OF PHYSICAL CHEMISTRY C, 112, 5, 1345, 1350, 2008年02月, [査読有り]
英語, 研究論文(学術雑誌) - Optical and dynamic properties of water-soluble highly luminescent CdTe quantum dots
Abhijit Mandal; Junichi Nakayama; Naoto Tamai; Vasudevanpillai Biju; Mitsuru Isikawa
JOURNAL OF PHYSICAL CHEMISTRY B, 111, 44, 12765, 12771, 2007年11月, [査読有り]
英語, 研究論文(学術雑誌) - Second enhancement in surface-enhanced resonance Raman scattering revealed by an analysis of anti-Stokes and Stokes Raman spectra (vol 76, pg 085405, 2007)
Tamitake Itoh; Kenichi Yoshida; Vasudevanpillai Biju; Yasuo Kikkawa; Mitsuru Ishikawa; Yukihiro Ozaki
PHYSICAL REVIEW B, 76, 12, 2007年09月, [査読有り]
英語 - Quantum dot-insect neuropeptide conjugates for fluorescence imaging, transfection, and nucleus targeting of living cells
Vasudevanpillai Biju; Damodaran Muraleedharan; Ken-ichi Nakayama; Yasuo Shinohara; Tamitake Itoh; Yoshinobu Baba; Mitsuru Ishikawa
LANGMUIR, 23, 20, 10254, 10261, 2007年09月, [査読有り]
英語, 研究論文(学術雑誌) - Second enhancement in surface-enhanced resonance Raman scattering revealed by an analysis of anti-Stokes and Stokes Raman spectra
Tamitake Itoh; Kenichi Yoshida; Vasudevanpillai Biju; Yasuo Kikkawa; Mitsuru Ishikawa; Yukihiro Ozaki
Physical Review B - Condensed Matter and Materials Physics, 76, 8, 2007年08月06日, [査読有り]
英語, 研究論文(学術雑誌) - COLL 494-Light and heat induced photoluminescence-variations in quantum dots
Vasudevanpillai Biju; Tamitake Itoh; Mitsuru Ishikawa
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 234, 2007年08月, [査読有り]
英語 - PHYS 525-Photoluminescence-variations of CdSe quantum dots and its relation to interactions of solvents and dissolved molecules on surface states
Vasudevanpillai Biju; Tamitake Itoh; Mitsuru Ishikawa
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 234, 2007年08月, [査読有り]
英語 - Second enhancement in surface-enhanced resonance Raman scattering revealed by an analysis of anti-Stokes and Stokes Raman spectra
Tamitake Itoh; Kenichi Yoshida; Vasudevanpillai Biju; Yasuo Kikkawa; Mitsuru Ishikawa; Yukihiro Ozaki
PHYSICAL REVIEW B, 76, 8, 2007年08月, [査読有り]
英語, 研究論文(学術雑誌) - Photoinduced photoluminescence variations of CdSe quantum dots in polymer solutions
Vasudevanpillai Biju; Ryodai Kanemoto; Yuusuke Matsumoto; Sayaka Ishii; Shunsuke Nakanishi; Tamitake Itoh; Yoshinobu Baba; Mitsuru Ishikawa
JOURNAL OF PHYSICAL CHEMISTRY C, 111, 22, 7924, 7932, 2007年06月, [査読有り]
英語, 研究論文(学術雑誌) - Combined spectroscopic and topographic characterization of nanoscale domains and their distributions of a redox protein on bacterial cell surfaces
Vasudevanpillai Biju; Duohai Pan; Yuri A. Gorby; Jim Fredrickson; Jeff McLean; Daad Saffarini; H. Peter Lu
LANGMUIR, 23, 3, 1333, 1338, 2007年01月, [査読有り]
英語, 研究論文(学術雑誌) - Chapter 10 Interaction between metal-free porphine and surface Ag atoms through temporal fluctuation of surface- enhanced resonance raman scattering and background- light emission
Tamitake Itoh; Kazuhiro Hashimoto; Vasudevanpillai Biju; Mitsuru Ishikawa; Bayden R. Wood; Yukihiro Ozaki
Handai Nanophotonics, 3, 161, 174, 2007年, [査読有り]
英語, 研究論文(学術雑誌) - Quenching of photoluminescence in conjugates of quantum dots and single-walled carbon nanotube
Vasudevanpillai Biju; Tamitake Itoh; Yoshinobu Baba; Mitsuru Ishikawa
JOURNAL OF PHYSICAL CHEMISTRY B, 110, 51, 26068, 26074, 2006年12月, [査読有り]
英語, 研究論文(学術雑誌) - Variations in steady-state and time-resolved background luminescence from surface-enhanced resonance Raman scattering-active single Ag nanoaggregates
Tamitake Itoh; Yasuo Kikkawa; Vasudevanpillai Biju; Mitsuru Ishikawa; Akifumi Ikehata; Yukihiro Ozaki
JOURNAL OF PHYSICAL CHEMISTRY B, 110, 43, 21536, 21544, 2006年11月, [査読有り]
英語, 研究論文(学術雑誌) - Close-conjugation of quantum dots and gold nanoparticles to sidewall functionalized single-walled carbon nanotube templates
Vasudevanpillai Biju; Tamitake Itoh; Yoji Makita; Mitsuru Ishikawa
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 183, 3, 315, 321, 2006年10月, [査読有り]
英語, 研究論文(学術雑誌) - Fabrication of a quantum dot-polymer matrix by layer-by-layer conjugation
Sayaka Ishii; Rintaro Ueji; Shunsuke Nakanishi; Yuichiro Yoshida; Hideya Nagata; Tamitake Itoh; Mitsuru Ishikawa; Vasudevanpillai Biju
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 183, 3, 285, 291, 2006年10月, [査読有り]
英語, 研究論文(学術雑誌) - Correlated measurements of plasmon resonance Rayleigh scattering and surface-enhanced resonance Raman scattering using a dark-field microspectroscopic system
Tamitake Itoh; Yasuo Kikkawa; Kenichi Yoshida; Kazuhiro Hashimoto; Vasudevanpillai Biju; Mitsuru Ishikawa; Yukihiro Ozaki
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 183, 3, 322, 328, 2006年10月, [査読有り]
英語, 研究論文(学術雑誌) - COLL 358-Close-packing of colloidal quantum dots: Photoluminescence properties of linear and spheroid assemblies of quantum dots
Vasudevanpillai Biju; Tamitake Itoh; Mitsuru Ishikawa
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 232, 2006年09月, [査読有り]
英語 - Elucidation of interaction between metal-free tetraphenylporphine and surface Ag atoms through temporal fluctuation of surface-enhanced resonance Raman scattering and background-light emission
T Itoh; K Hashimoto; Biju, V; M Ishikawa; BR Wood; Y Ozaki
JOURNAL OF PHYSICAL CHEMISTRY B, 110, 19, 9579, 9585, 2006年05月, [査読有り]
英語, 研究論文(学術雑誌) - Surface-enhanced resonance Raman scattering and background light emission coupled with plasmon of single Ag nanoaggregates
T Itoh; Biju, V; M Ishikawa; Y Kikkawa; K Hashimoto; A Ikehata; Y Ozaki
JOURNAL OF CHEMICAL PHYSICS, 124, 13, 1347081, 1347086, 2006年04月, [査読有り]
英語, 研究論文(学術雑誌) - Subsecond luminescence intensity fluctuations of single CdSe quantum dots
Biju, V; Y Makita; T Nagase; Y Yamaoka; H Yokoyama; Y Baba; M Ishikawa
JOURNAL OF PHYSICAL CHEMISTRY B, 109, 30, 14350, 14355, 2005年08月, [査読有り]
英語, 研究論文(学術雑誌) - Temperature-sensitive photoluminescence of CdSe quantum dot clusters
Biju, V; Y Makita; A Sonoda; H Yokoyama; Y Baba; M Ishikawa
JOURNAL OF PHYSICAL CHEMISTRY B, 109, 29, 13899, 13905, 2005年07月, [査読有り]
英語, 研究論文(学術雑誌) - Display and retraction of outer membrane cytochromes by Shewanella oneidensis in response to electron acceptor availability
Y Gorby; Biju, V; D Pan; J McLean; D Saffarini; J Fredrickson; HP Lu
GEOCHIMICA ET COSMOCHIMICA ACTA, 69, 10, A671, A671, 2005年05月, [査読有り]
英語 - Structure and properties of narrow size-dispersed nanoclusters of quantum dots.
VP Biju; Y Makita; H Yokoyama; Y Baba; M Ishikawa
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 229, U675, U675, 2005年03月, [査読有り]
英語 - Intermittent single-molecule interfacial electron transfer dynamics.
Biju, V; M Micic; DH Hu; HP Lu
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 229, U790, U790, 2005年03月, [査読有り]
英語 - Novel properties of luminescent quantum dots and their application to nano-sensors
Mitsuru Ishikawa; Vasudevan Pillai Biju
IDW/AD '05: PROCEEDINGS OF THE 12TH INTERNATIONAL DISPLAY WORKSHOPS IN CONJUNCTION WITH ASIA DISPLAY 2005, VOLS 1 AND 2, 929, 932, 2005年, [査読有り]
英語, 研究論文(国際会議プロシーディングス) - Synthesis of CdTe quantum dots using a heterogeneous process at low temperature and their optical and structural properties
R Jose; Biju, V; Y Kamakoa; T Nagase; Y Makita; Y Shinohara; Y Baba; M Ishikawa
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 79, 8, 1833, 1838, 2004年12月, [査読有り]
英語, 研究論文(学術雑誌) - Intermittent single-molecule interfacial electron transfer dynamics
Biju, V; M Micic; DH Hu; HP Lu
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 126, 30, 9374, 9381, 2004年08月, [査読有り]
英語, 研究論文(学術雑誌) - Dynamics of photoinduced electron-transfer processes in fullerene-based dyads: Effects of varying the donor strength
KG Thomas; Biju, V; PV Kamat; MV George; DM Guldi
CHEMPHYSCHEM, 4, 12, 1299, 1307, 2003年12月, [査読有り]
英語 - Spatial heterogeneity in a polymer thin film probed by single molecules
VP Biju; JY Ye; M Ishikawa
JOURNAL OF PHYSICAL CHEMISTRY B, 107, 39, 10729, 10735, 2003年10月, [査読有り]
英語, 研究論文(学術雑誌) - Fluorophore modified microcontact prints: A methodology for readout using fluorescence microscopy (vol 46, pg 155, 2002)
Biju, V; M Gad; W Mizutani; S Murata; M Ishikawa
JOURNAL OF IMAGING SCIENCE AND TECHNOLOGY, 46, 4, III, III, 2002年07月, [査読有り]
英語 - Erratum: Fluorophore modified microcontact prints: A methodology for readout using fluorescence microscopy (Journal of Imaging Science and Technology (2002) 46 (155-158))
V. Biju; M. Gad; W. Mizutani; S. Murata; M. Ishikawa
Journal of Imaging Science and Technology, 46, 4, 2002年07月
英語, 研究論文(学術雑誌) - Fabrication of standard samples for single-molecule fluorescence imaging
Biju, V; M Takeuchi; K Umemura; M Gad; M Ishikawa
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 41, 3A, 1579, 1586, 2002年03月, [査読有り]
英語, 研究論文(学術雑誌) - Fluorophore modified microcontact prints: A methodology for readout using fluorescence microscopy
Biju, V; M Gad; W Mizutani; S Murata; M Ishikawa
JOURNAL OF IMAGING SCIENCE AND TECHNOLOGY, 46, 2, 155, 158, 2002年03月, [査読有り]
英語, 研究論文(学術雑誌) - Clusters of bis- and tris-fullerenes
Biju, V; PK Sudeep; KG Thomas; MV George; S Barazzouk; PV Kamat
LANGMUIR, 18, 5, 1831, 1839, 2002年03月, [査読有り]
英語, 研究論文(学術雑誌) - Distribution of single molecules in polymer thin films
Biju, V; M Yamauchi; M Ishikawa
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 140, 3, 237, 241, 2001年05月, [査読有り]
英語, 研究論文(学術雑誌) - Photoinduced electron transfer between 1,2,5-triphenylpyrrolidinofullerene cluster aggregates and electron donors
Biju, V; S Barazzouk; KG Thomas; MV George; PV Kamat
LANGMUIR, 17, 10, 2930, 2936, 2001年05月, [査読有り]
英語, 研究論文(学術雑誌) - Orientation-dependent electron transfer processes in fullerene-aniline dyads
KG Thomas; Biju, V; DM Guldi; PV Kamat; MV George
JOURNAL OF PHYSICAL CHEMISTRY A, 103, 50, 10755, 10763, 1999年12月, [査読有り]
英語, 研究論文(学術雑誌) - Photoinduced charge separation and stabilization in clusters of a fullerene-aniline dyad
KG Thomas; Biju, V; DM Guldi; PV Kamat; MV George
JOURNAL OF PHYSICAL CHEMISTRY B, 103, 42, 8864, 8869, 1999年10月, [査読有り]
英語, 研究論文(学術雑誌) - Photoinduced electron transfer in clusters of a fullerene-aniline dyad.
KG Thomas; Biju, V; MV George; DM Guldi; PV Kamat
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 218, U317, U317, 1999年08月, [査読有り]
英語 - Photoinduced charge separation in clusters of fullerene-aniline dyads
Biju, V; KG Thomas; MV George; D Guldi; PV Kamat
RECENT ADVANCES IN THE CHEMISTRY AND PHYSICS OF FULLERENES AND RELATED MATERIAL, VOL 7, 99, 12, 296, 303, 1999年, [査読有り]
英語, 研究論文(国際会議プロシーディングス) - Excited-state interactions in pyrrolidinofullerenes
KG Thomas; Biju, V; MV George; DM Guldi; PV Kamat
JOURNAL OF PHYSICAL CHEMISTRY A, 102, 28, 5341, 5348, 1998年07月, [査読有り]
英語, 研究論文(学術雑誌) - Studies on intramolecular photoinduced electron transfer processes in fullerene based donor-bridge-acceptor systems
PV Kamat; D Guldi; Biju, V; KG Thomas; MV George
RECENT ADVANCES IN THE CHEMISTRY AND PHYSICS OF FULLERENES AND RELATED MATERIALS, VOL 6, 98, 8, 273, 280, 1998年, [査読有り]
英語, 研究論文(国際会議プロシーディングス) - Excited state behavior of fullero-phenylpyrrolidines
PV Kamat; D Guldi; D Liu; KG Thomas; Biju, V; S Das; MV George
PROCEEDINGS OF THE SYMPOSIUM ON RECENT ADVANCES IN THE CHEMISTRY AND PHYSICS OF FULLERENES AND RELATED MATERIALS, VOL 4, 97, 14, 122, 128, 1997年, [査読有り]
英語, 研究論文(国際会議プロシーディングス)
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RAHUL Ghosh Dastidar; OKAMOTO Takuya; TAKAHASHI Kiyonori; TAKANO Yuta; BIJU Vasudevanpillai, 日本化学会春季年会講演予稿集(Web), 104th, 2024年 - ミトコンドリア標的型DDSを基盤とした癌光治療の検証
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伊藤民武; 山本裕子; 田丸博晴; BIJU Vasudevanpillai; 脇田慎一, プラズモニクスシンポジウム, 13th, 2016年 - 光化学反応による金ナノクラスターの発光特性制御
濱田守彦; 濱田守彦; 小原怜子; 小原怜子; 中西俊介; 脇田慎一; BIJU Vasudevanpillai, 光化学討論会要旨集(CD-ROM), 2015, 2015年 - 単一SERSホットスポットにおけるスペクトル変化分析
伊藤民武; 山本裕子; 田丸博晴; BIJU Vasudevanpillai; 脇田慎一, 応用物理学会春季学術講演会講演予稿集(CD-ROM), 62nd, 2015年 - 光化学表面改質による半導体量子ドットの明滅現象の抑制および発光強度の増強
濱田守彦; 竹之越規史; 脇田慎一; 中西俊介; BIJU Vasudevanpillai, 日本化学会講演予稿集, 95th, 2, 2015年 - ナノグラファイトクラスターにおける欠陥ダイナミクスのSERS分析
伊藤民武; 山本裕子; 田丸博晴; BIJU Vasudevanpillai; 脇田慎一, 応用物理学会秋季学術講演会講演予稿集(CD-ROM), 76th, 2015年 - 単一銀ナノ粒子2量体間隙に吸着した色素分子のSERSスペクトル変化
伊藤民武; 山本裕子; 山本裕子; BIJU Vasudevanpillai; 脇田慎一; 田丸博晴, 光化学討論会要旨集(CD-ROM), 2015, 2015年 - プラズモン共鳴による単一ラマンモードの選択的増強の観測
伊藤民武; 山本裕子; 田丸博晴; BIJU Vasudevanpillai; 脇田慎一, 応用物理学会春季学術講演会講演予稿集(CD-ROM), 61st, 2014年 - 結合振動子モデルを用いた銀ナノ粒子2量体と色素分子で構成された電磁気学的強結合系の評価
伊藤民武; 山本裕子; 田丸博晴; BIJU Vasudevanpillai; 脇田慎一; 尾崎幸洋, 光化学討論会要旨集(CD-ROM), 2014, 2014年 - CdSe/ZnS量子ドット溶液の四光波混合分光
小野万里; 廣澤佑亮; 香西浩嘉; 山崎尚哉; 宮川勇人; 鶴町徳昭; 小柴俊; 中西俊介; BIJU V., 応用物理・物理系学会中国四国支部合同学術講演会講演予稿集, 2013, 2013年 - 銀ナノ粒子2量体と色素で構成されたプラズモン-分子双極子強結合系の古典的結合振動子モデルを用いた評価
伊藤民武; 山本裕子; 田丸博晴; BIJU Vasudevanpillai; 脇田慎一; 尾崎幸洋, 応用物理学会秋季学術講演会講演予稿集(CD-ROM), 74th, 2013年 - 光化学反応による量子ドットの発光強度の増強
濱田守彦; 濱田守彦; 竹之越規史; 竹之越規史; 脇田慎一; 中西俊介; BIJU Vasudevanpillai; BIJU Vasudevanpillai, 光化学討論会講演要旨集, 2013, 2013年 - 太陽電池特性向上に向けた光化学反応によるCdSe/ZnS量子ドット表面の不活化
濱田守彦; 濱田守彦; 竹之越規史; 竹之越規史; 的崎圭司; FENG Qi; 脇田慎一; 中西俊介; BIJU Vasudevanpillai, 応用物理・物理系学会中国四国支部合同学術講演会講演予稿集, 2013, 2013年 - 18pHB-4 四光波混合法を用いたCdSe/ZnS量子ドットと環状分子溶媒の動的相互作用の検出(18pHB 励起子・ポラリトン,領域5(光物性))
廣澤 佑亮; 香西 浩嘉; 宮川 勇人; 鶴町 徳昭; 小柴 俊; 中西 俊介; Biju V. P, 日本物理学会講演概要集, 67, 2, 673, 673, 2012年08月24日
一般社団法人日本物理学会, 日本語 - Blinking Suppression in Semiconductor Quantum Dots and Single-molecule Imaging
BIJU Vasudevan Pillai, 化学と工業 = Chemistry and chemical industry, 64, 8, 625, 625, 2011年08月01日
英語 - 25pHB-7 コロイド状CdSe/ZnS量子ドットの位相緩和の溶媒効果(25pHB 微粒子・ナノ結晶,領域5(光物性))
香西 浩嘉; 宮川 勇人; 鶴町 徳昭; 小柴 俊; 伊藤 寛; 中西 俊介; Biju V. P.; 石川 満, 日本物理学会講演概要集, 66, 1, 741, 741, 2011年03月03日
一般社団法人日本物理学会, 日本語 - 25pHB-8 CdSe/ZnS単一量子ドットにおける電子移動によるBlinking抑制(25pHB 微粒子・ナノ結晶,領域5(光物性))
濱田 守彦; 鶴町 徳昭; 伊藤 寛; 中西 俊介; 石川 満; Biju V., 日本物理学会講演概要集, 66, 1, 741, 741, 2011年03月03日
一般社団法人日本物理学会, 日本語 - Photochemical Reaction of CdSe/ZnS Single Quantum Dots with Amine
M. Hamada; N. Tsurumachi; S. Nakanishi; E. S. Shibu; M. Ishikawa; V. Biju, Proc. IQEC/CLEO Pacific Rim 2011, 381, 383, 2011年 - Effect of solvents on optical coherence properties of CdSe/ZnS quantum dots in solution detected by femtosecond four-wave mixing
H. Kouzai; Y. Hirosawa; H. Miyagawa; N. Tsurumachi; S. Koshiba; S. Nakanishi; V. Biju; M. Ishikawa, Proc. IQEC/CLEO Pacific Rim 2011, 2163, 2165, 2011年 - 24aWQ-1 コロイド状CdSe/ZnS量子ドットにおける位相緩和の溶媒効果(24aWQ 量子ドット,領域4(半導体メゾスコピック系・局在))
香西 浩嘉; 宮川 勇人; 鶴町 徳昭; 小柴 俊; 伊藤 寛; 中西 俊介; Biju V. P.; 石川 満, 日本物理学会講演概要集, 65, 2, 645, 645, 2010年08月18日
一般社団法人日本物理学会, 日本語 - 21pHW-7 ナノ粒子によるCdSe/ZnS単一量子ドットのBlinkingに対する効果(21pHW 量子ドット・グラフェン,領域4(半導体,メゾスコピック系・局在))
濱田 守彦; 鶴町 徳昭; 中西 俊介; 伊藤 寛; Biju V.; 石川 満, 日本物理学会講演概要集, 65, 1, 720, 720, 2010年03月01日
一般社団法人日本物理学会, 日本語 - コロイド状CdSe/ZnS量子ドット溶液における位相緩和
香西浩嘉; 宮川勇人; 鶴町徳昭; 小柴俊; 伊藤寛; 中西俊介; BIJU V. P.; 石川満, 応用物理学会中国四国支部・日本物理学会中国支部・四国支部・日本物理教育学会中国四国支部支部学術講演会講演予稿集, 2010, 2010年 - CdSe/ZnS単一量子ドットにおける電子移動によるBlinking抑制
濱田守彦; 宮川勇人; 鶴町徳昭; 小柴俊; 伊藤寛; 伊藤民武; 石川満; BIJU V.; 中西俊介, 応用物理学会中国四国支部・日本物理学会中国支部・四国支部・日本物理教育学会中国四国支部支部学術講演会講演予稿集, 2010, 2010年 - 30aVD-3 金属微粒子との相互作用によるCdSe量子ドットの発光特性変化(30aVD 微粒子・ナノ結晶・局在中心,領域5(光物性))
松本 祐介; 山岡 洋也; 鶴町 徳昭; 伊藤 寛; 中西 俊介; Biju V.; 伊藤 民武; 石川 満, 日本物理学会講演概要集, 64, 1, 764, 764, 2009年03月03日
一般社団法人日本物理学会, 日本語 - 単一酵母菌の細胞壁の表面増強ラマン散乱分光分析 : 細胞表面の単一分子分析
伊藤 民武; スジス アチヤナチル; 安部 博子; 吉田 健一; ビジュ バステバンピライ; 石川 満, レーザー学会研究会報告 = Reports on the Topical meeting of the Laser Society of Japan, 382, 37, 41, 2009年01月15日
日本語 - 19aZB-10 量子ドット・ポリマー系の発光特性(微粒子・ナノ結晶,表面・薄膜,領域5,光物性)
金本 嶺泰; 石井 さやか; 松本 祐介; 菅野 恵一郎; 伊藤 寛; 鶴町 徳昭; 中西 俊介; Biju Vasudevanpillai; 伊藤 民武; 石川 満, 日本物理学会講演概要集, 62, 1, 711, 711, 2007年02月28日
一般社団法人日本物理学会, 日本語 - SERSの原理とマイクロバイオイメージング応用
伊藤 民武; BIJU Vasudevanpillai; 石川 満; 吉田 健一; 尾崎 幸洋; 福岡 隆夫, 電気学会研究会資料. BMS, バイオ・マイクロシステム研究会 = The papers of Technical Meeting on Bio Micro Systems, IEE Japan, 2007, 1, 13, 19, 2007年01月30日
日本語 - Temperature-Sensitive Photoluminescence of CdSe Quantum Dot Clusters
Vasudevanpillai Biju; Yoji Makita; Akinori Sonoda; Hiroshi Yokoyama; Yoshinobu Baba; Mitsuru Ishikawa, J. Phys. Chem. B, 109, 29, 13899, 905, 2005年07月28日, [査読有り], [国際誌]
The formation of narrow size dispersed and nanometer size aggregates (clusters) of cadmium selenide (CdSe) quantum dots (QDs) and their temperature-sensitive photoluminescence (PL) spectral properties close to room temperature (298 K) are discussed. CdSe QDs formed stable clusters with an average diameter of approximately 27 nm in the absence of coordinating solvents. Using transmission electron microscopy (TEM) imaging, we identified the association of individual QDs with 2-5 nm diameters into clusters of uniform size. A suspension of these clusters in different solvents exhibited reversible PL intensity changes and PL spectral shifts which were correlated with temperature. Although the PL intensity of CdSe QDs encapsulated in host matrixes and the solid state showed a response to temperature under cryogenic conditions, the current work identified for the first time QD clusters showing temperature-sensitive PL intensity variations and spectral shifts at moderate temperatures above room temperature. Temperature-sensitive reversible PL changes of clusters are discussed with respect to reversible thermal trapping of electrons at inter-QD interfaces and dipole-dipole interactions in clusters. Reversible luminescence intensity variations and spectral shifts of QD clusters show the potential for developing sensors based on QD nanoscale assemblies., 英語 - 量子ドットクラスターの温度に依存する発光特性
石川満; BIJU V. P.; 槙田洋二; 苑田晃成; 横山浩; 馬場嘉信; 馬場嘉信, 光化学討論会講演要旨集, 2005, 2005年 - 蛍光性半導体量子ドットの低温合成法
石川満; BIJU V P; JOSE R; 長瀬智美; 槙田洋二; 篠原康雄; 馬場嘉信, 光化学討論会講演要旨集, 2004, 2004年 - 単一分子運搬のためのマイクロチャネル内における蛍光ナノ粒子拡散係数測定
山岡禎久; DANG F; BIJU V P; 西本尚弘; 中西博昭; 篠原康雄; 石川満; 馬場嘉信, 化学とマイクロ・ナノシステム研究会講演要旨集, 10th, 2004年
- Pi-Stacking-Induced Self-Assembly of CsPbBr3 into Supercrystals
Aneesha SL; Takuya Okamoto; Vasudevanpillai Biju
The 25th RIES - Hokudai International Symposium, 2024年12月10日, 英語, ポスター発表
2024年12月10日 - 2042年12月10日 - Defect-Assisted Emission of Hybrid Indium Bromide Single Crystals
Haichao Zhou, Takuya Okamoto, Kiyonori Takahashi, Biju Vasudevan Pillai
日本化学会第105回春季年会(2025), 2025年03月26日, 英語, ポスター発表
2025年03月26日 - 2025年03月29日 - Synthesis of Titanium Nitride Semiconductor Nanocrystals
Aswathi Maladan, Takuya Okamoto, Biju Vasudevanpillai, Subrahmanyam Challapalli, Most Farida Khatun, Mohit Kumar
日本化学会第105回春季年会(2025), 2025年03月26日, 英語, ポスター発表
2025年03月26日 - 2025年03月29日 - Stabilization of Inter-halogen Interfaces in Heterojunction Halide Perovskites
Yifei Xia, Most Farida Khatun, Takuya Okamoto, Biju Vasudevan Pillai
日本化学会第105回春季年会(2025), 2025年03月26日, 英語, ポスター発表
2025年03月26日 - 2025年03月29日 - Perovskite Nanocrystal Assembly Formation by π–π Stacking Interaction of Ligands
Aneesha SL, Takuya Okamoto, Biju Vasudevan Pillai
日本化学会第105回春季年会(2025), 2025年03月26日, 英語, ポスター発表
2025年03月26日 - 2025年03月29日 - Nanobioconjugates for Molecular, Cellular, and In Vivo Imaging
Biju Vasudevan Pillai
International Conference on Recent Advances in Smart Materials and Molecular Imaging, Mar Ivanios College, Trivandrum, India, 2025年03月21日, 英語, シンポジウム・ワークショップパネル(指名)
2025年03月21日 - 2025年03月21日, [招待講演] - Opportunities and Challeges for Indians in the Emerging Academic World
Biju Vasudevan Pillai
National Science Day Lecture Organized by the Kerala State Science and Technology Council, Trivandrum, India, 2025年02月28日, 英語, 公開講演,セミナー,チュートリアル,講習,講義等
2025年02月28日 - 2025年02月28日, [招待講演] - Dynamic Excitons in Semiconductors
Biju Vasudevan Pillai
International Conference on Emerging Magterials for Sustainable Development 2025, 2025年02月20日, 英語, 口頭発表(招待・特別)
2025年02月20日 - 2025年02月20日, [招待講演] - Controlling Anion Exchange in Lead Halide Perovskite Heterojunction
Yifei Xia, Most. Farida Khatun, Takuya Okamoto, Vasudevanpillai Biju
The 25th RIES - Hokudai International Symposium, 2024年12月10日, 英語, ポスター発表
2024年12月10日 - 2024年12月10日 - Defect-Assisted Emission from (C10H22N2)4In4Br20 Crystals
Haichao Zhou, Takuya Okamoto, Kiyonori Takahashi, Yuta Takano, Vasudevan Pillai Biju
The 25th RIES - Hokudai International Symposium, 2024年12月10日, 英語, ポスター発表
2024年12月10日 - 2024年12月10日 - Rod-shaped Spinel Co3O4 and Carbon Nitride Heterostructure Modified Fluorine-Doped Tin Oxide Electrode as an Electrochemical Transducer for Efficient Sensing of Hydrazine
Aswathi Maladan, Vasudevanpillai Biju, Asha Ramesh, Pravat Kumar Sahu, Suryakala Duvvuri, Ch Subrahmanyam
The 25th RIES - Hokudai International Symposium, 2024年12月10日, ベンガル語, ポスター発表
2024年12月10日 - 2024年12月10日 - Ultrafast Photoluminescence Blinking of MAPbI3 Quantum Dots Coupled with Au Nanorods Plasmon
Tianci Wang, Lei Duan, Takuya Okamoto, Vasudevanpillai Biju
The 25th RIES - Hokudai International Symposium, 2024年12月10日, 英語, ポスター発表
2024年12月10日 - 2024年12月10日 - Exciton Recombination and Defect Control in Halide Perovskite Single Quantum Dots
Biju Vasudevan Pillai
2024 RIES-CEMS Symposium, NYCTU, Taiwan, 2024年11月28日, 英語, シンポジウム・ワークショップパネル(指名)
2024年11月28日 - 2024年11月29日, [招待講演] - Photoluminescence Enhancement in Zero-Dimensional Hybrid Copper Halide Microcrystals
Rahul GHOSH DASTIDAR; Takuya OKAMOTO; Vasudevanpillai BIJU
2024年 光化学討論会, 2024年09月03日, 英語, ポスター発表
2024年09月03日 - 2024年09月05日 - Ultrafast Photoluminescence Blinking in MAPbI3 Perovskite Quantum Dots on Gold Nanoparticles
Tianci WANG; Lei DUAN; Takuya OKAMOTO; Vasudevanpillai BIJU
2024年 光化学討論会, 2024年09月03日, 英語, ポスター発表
2024年09月03日 - 2024年09月05日 - JPA Award 2023 Award Lecture "Blinking Suppression and Photoluminescence Enhancement in Semiconductor Quantum Dots”
Biju Vasudevan Pillai
2024年光化学討論会, 2024年09月03日, 英語, 口頭発表(招待・特別)
2024年09月03日 - 2024年09月05日, [招待講演] - Organic Molecular NearInfrared Photocatalyst Based on Sulfone-rosamine
Kazuya YOSHIDA; Yoshiyuki KAWABATA; Tatsuo NAKAGAWA; Toshiaki SUZUKI; Vasudevanpillai BIJU; Yuta TAKANO
2024年 光化学討論会, 2024年09月03日, 英語, 口頭発表(一般)
2024年09月03日 - 2024年09月05日 - Excitons in Semiconductor Quantum Dots
Biju Vasudevan Pillai
APJ Abdul Kalam Technological University Workshop Series, 2024年08月30日, 英語, シンポジウム・ワークショップパネル(指名)
2024年08月30日 - 2024年08月31日, [招待講演] - Dual Emission Modulation of Zero-Dimensional Hybrid Copper Halides
R. G. Dastidar; T. Okamoto; V. P. Biju
日本化学会 第104春季年会, 2024年03月18日, 英語, 口頭発表(一般)
2024年03月18日 - 2024年03月24日 - Plasmon-influenced photoluminescence blinking behavior of lead halide perovskite quantum dots
T. Wang; T. Okamoto; V. P. Biju
日本化学会 第104春季年会, 2024年03月18日, 英語, ポスター発表
2024年03月18日 - 2024年03月24日 - 化学修飾による半導体ナノ結晶のマイクロコンタクトプリンティング
岡本 拓也; Vasudevan; Pillai Biju
日本化学会 第104春季年会, 2024年03月18日, 日本語, ポスター発表
2024年03月18日 - 2024年03月24日 - Controlling anion exchange in lead halide perovskite microcrystals
Y. Xia; V. P. Biju
化学系学協会北海道支部2024年冬季研究発表会, 2024年01月23日, 英語, ポスター発表
2024年01月23日 - 2024年01月24日 - Excitonic and biexcitonic recombination processes in halide perovskites
L. Duan; V. P. Biju
化学系学協会北海道支部2024年冬季研究発表会, 2024年01月23日, 英語, ポスター発表
2024年01月23日 - 2024年01月24日 - Photoinduced electron transfer in halide perovskite-based donor-acceptor systems for solar energy harvesting
K. Xu; V. P. Biju
化学系学協会北海道支部2024年冬季研究発表会, 2024年01月23日, 英語, ポスター発表
2024年01月23日 - 2024年01月24日 - Excitons and free carriers in semiconductor quantum dot systems
Vasudevan Pillai Biju
ICAMS 2023, 2023年12月21日, 英語, 口頭発表(招待・特別)
2023年12月21日 - 2023年12月23日, [招待講演] - Excitons and Free Carriers in Quantum Dots
Vasudevan Pillai Biju
ICMM2023, 2023年12月16日, 英語, 口頭発表(招待・特別)
2023年12月16日 - 2023年12月18日, [招待講演] - Halide perovskite supercrystals and self-assemblies prepared using organic ligands
T. Wang; T. Okamoto; V. P. Biju
The 2023 RIES–CEFMS Joint International Symposium, 2023年12月07日, 英語, ポスター発表
2023年12月07日 - 2023年12月08日 - Low dimensional metal halide fluorecent crystals
Dastidar Ghosh Rahul; 岡本 拓也; Vasudevan; Pillai Biju
The 2023 RIES–CEFMS Joint International Symposium, 2023年12月07日, 英語, ポスター発表
2023年12月07日 - 2023年12月08日 - Excitons in Halide Perovskite Assemblies
T. Okamoto; V. P. Biju
The 2023 RIES–CEFMS Joint International Symposium, 2023年12月07日, 英語, ポスター発表
2023年12月07日 - 2023年12月08日 - Low-Dimensional Fluorescent Hybrid Metal Halide Crystals
R. D. Ghosh; T. Okamoto; C. Subrahmanyam; V. P. Biju
The 24th RIES-HOKUDAI INTERNATIONAL SYMPOSIUM, 2023年12月06日, 英語, ポスター発表
2023年12月06日 - 2023年12月07日 - Methylammonium lead bromide perovskite supercrystals prepared by ligand exchange on nanocrystals
T. WANG; T. Okamoto; V. P. Biju
The 24th RIES-HOKUDAI INTERNATIONAL SYMPOSIUM, 2023年12月06日, 英語, ポスター発表
2023年12月06日 - 2023年12月07日 - Development of Photo-functional Mesoscopic Quantum Dot Assemblies
R. Akter; Y. Takano; N. Kirkwood; P. Malvaney; V. P. Biju
The 24th RIES-HOKUDAI INTERNATIONAL SYMPOSIUM, 2023年12月06日, 英語, ポスター発表
2023年12月06日 - 2023年12月07日 - Defect Passivation and Halide Exchange in Amphiphilic Ligand-Capped CsPbBr3 Perovskite Nanocrystals
F. M. Khatun; T. Okamoto; V. P. Biju
The 24th RIES-HOKUDAI INTERNATIONAL SYMPOSIUM, 2023年12月06日, 英語, ポスター発表
2023年12月06日 - 2023年12月07日 - Excitons in Halide Perovskite Nanocrystals and Assemblies
T. Okamoto; V. P. Biju
APC2023, 2023年11月27日, 英語, 口頭発表(招待・特別)
2023年11月27日 - 2023年12月01日, [招待講演] - Interfacial Defect Passivation of Amphiphilic Ligand Capped Highly Luminescent Halide Perovskite Nanocrystals
F. M. Khatun; S. Ghimire; S. Mahesha. Bhagyashree; T. Okamoto; Jeladhara Sobhanan; C. Subrahmanyam; V. P. Biju
14th ISAJ Annual Symposium, 2023年11月10日, 英語, ポスター発表
2023年11月10日 - 2023年11月10日 - Low-Dimensional Fluorescent Hybrid Metal Halide Crystals
R. G. Dastidar; T. Okamoto; C. Subrahmanyam; V. P. Biju
14th ISAJ Annual Symposium, 2023年11月10日, 英語, ポスター発表
2023年11月10日 - 2023年11月10日 - An Efficient electron transport from Perovskites Nanocrystals to A C60-RCOOH ligand for solar cells Development
R. Akter; T. Wang; S. Palyam; T. Okamoto; Y. Takano; V. P. Biju
14th ISAJ Annual Symposium, 2023年11月10日, 英語, ポスター発表
2023年11月10日 - 2023年11月10日 - Luminescent 0D Hybrid Copper Halide Single Crystals
R. D. Ghosh*, T. Okamoto and V. P. Biju
2023年光化学討論会, 2023年09月05日, 英語, ポスター発表
2023年09月05日 - 2023年09月07日 - Thermodynamically Controlled Crystallization of Perovskite Single Crystals
D. Zhang; T. Okamoto; V. P. Biju
2023年光化学討論会, 2023年09月05日, 英語, ポスター発表
2023年09月05日 - 2023年09月07日 - Slipping-Free Halide Perovskite Supercrystals Formed from Nanocrystals using Bidentate Ligands
T. Okamoto; V. P. Biju
2023年光化学討論会, 2023年09月05日, 日本語, 口頭発表(一般)
2023年09月05日 - 2023年09月07日 - Simulated Solar Light Harvesting Efficiencies of FAPbI3 Perovskite-based Solar Cells
Xu Kangjian; alyam Subramanyam; 岡本 拓也; Vasudevan; Pillai Biju
日本化学会北海道支部2023年夏季研究発表会, 2023年09月03日, 英語, ポスター発表
2023年09月03日 - 2023年09月03日 - Interfacial electron transfer in FAPbI3 perovskite-based electron donor-accepter systems
Wang Qiankun; asudevan Pillai Biju
日本化学会北海道支部2023年夏季研究発表会, 2023年09月03日, 英語, ポスター発表
2023年09月03日 - 2023年09月03日 - Exciton and charge carrier recombination dynamics in halide perovskites crystals: a study of crystal size effects
L. Duan , S. Palyam, T. Okamoto and V. P. Biju
日本化学会北海道支部2023年夏季研究発表会, 2023年09月03日, 英語, ポスター発表
2023年09月03日 - 2023年09月03日 - Heat-Induced Modulating the Excitonic Properties of Halide Perovskite Assemblies using Polymer Microenvironments
F. M. Khatun; T. Okamoto; V. P. Biju
ICP2023, 2023年09月01日, 英語, ポスター発表
2023年09月01日 - 2023年09月01日 - Exciton Recombination Dynamics in Halide Perovskite Nanocrystals, Microcrystals, and Supercrystals
Vasudevan Pillai Biju
Department Special Lecture, 2023年09月01日, 英語, 口頭発表(招待・特別)
2023年09月01日 - 2023年09月01日, [招待講演] - Structures and Optical Properties of Halide Perovskite Assemblies
T. Okamoto; V. P. Biju
ICP2023, 2023年07月23日, 英語, ポスター発表
2023年07月23日 - 2023年07月28日 - The study on the crystallization of MAPbBr3 single crystal by a modified inverse temperature crystallization method
D. Zhang; T. Okamoto; V. P. Biju
ICP2023, 2023年07月23日, 英語, ポスター発表
2023年07月23日 - 2023年07月28日 - Fluorescent probe molecules that “store” singlet oxygen detection
Y. Takano; D. Sasikumar; H. Zhao; Y. Miyatake; V. P. Biju
ICP2023, 2023年07月23日, 英語, 口頭発表(一般)
2023年07月23日 - 2023年07月28日 - Heat-Induced Modulating the Excitonic Properties of Halide Perovskite Assemblies using Polymer Microenvironments
F. M. Khatun; T. Okamoto; V. P. Biju
ICP2023, 2023年07月23日, 英語, ポスター発表
2023年07月23日 - 2023年07月28日 - Exciton and carrier dynamics in halide perovskite crystals
Vasudevan Pillai Biju
Emerging Materials 2023, 2023年07月13日, 英語, 口頭発表(招待・特別)
2023年07月13日 - 2023年07月15日 - 硫黄原子のd*−π*混成軌道を利用した光温熱がん治療向け近赤外光吸収色
吉田 和矢; 小阪田 泰子; 藤塚 守; Vasudevan; Pillai Biju; 髙野 勇太
日本ケミカルバイオロジー学会 第17回年会, 2023年05月29日, 英語, 口頭発表(一般)
2023年05月31日 - 癌の光温熱治療に向けた近赤外光吸収有機分子の開発
吉田 和矢; Vasudevan Pillai Biju; 髙野 勇太
日本化学会103春季年会(2023), 2023年03月22日
2023年03月23日 - 2023年03月25日 - 二座配位子により形成したハロゲン化鉛ペロブスカイト超結晶の構造と光物性
岡本 拓也; Vasudevan Pillai Biju
日本化学会103春季年会(2023), 2023年03月22日, 英語, ポスター発表
2023年03月22日 - 2023年03月25日 - Porphyrin-based Near-Infrared Photosensitizers for Singlet Oxygen Generation
Zhao Hanjun; 髙野 勇太; 宮武 由甲子; Vasudevan; Pillai Biju
日本化学会103春季年会(2023), 2023年03月22日, 英語, ポスター発表
2023年03月22日 - 2023年03月25日 - 三次元培養すい癌細胞における死細胞成分-表面修飾蛍光ビーズの動態観察
髙野 勇太; 宮武 由甲子; 繁富 香織; Vasudevan; Pillai Biju
日本化学会103春季年会(2023), 2023年03月22日, 英語, ポスター発表
2023年03月22日 - 2023年03月25日 - トリアゾールカルボアルデヒド誘導体による N 末端修飾を利用した緑色蛍光タンパク質のガラス基板への固定化と一分子蛍光観察
張 晏; Zhang Dong; 小野田 晃; Vasudevan; Pillai Biju
日本化学会103春季年会(2023), 2023年03月22日, 英語, ポスター発表
2023年03月22日 - 2023年03月25日 - Benzoquinone Systems for Photoinduced Interfacial Electron Transfer
Q. Wang; V. P. Biju
化学系学協会北海道支部2023年冬期研究会, 2023年01月25日, 英語, ポスター発表
2023年01月25日 - 2023年01月25日 - Perovskite Nanocrystal Benzoquinone Systems for solar cells
XU KANGJIAN; asudevan; Pillai Biju
化学系学協会北海道支部2023年冬期研究会, 2023年01月25日, 英語, ポスター発表
2023年01月25日 - 2023年01月25日 - Reabsorption-Emission in Methylammonium Lead Bromide Perovskite Single Crystals
Duan Lei; asudevan Pillai Biju
化学系学協会北海道支部2023年冬期研究会, 2023年01月25日, 英語, ポスター発表
2023年01月25日 - 2023年01月25日 - Assembly-Assisted Carrier Relaxation in Formamidinium Lead Bromide Quantum Dots
F. M. Khatun; V. P. Biju
化学系学協会北海道支部2023年冬期研究会, 2023年01月25日, 英語, 口頭発表(一般)
2023年01月25日 - 2023年01月25日 - π-Extended Porphyrin Photosensitizers for Near-Infrared Light-Mediated Singlet Oxygen Generation
Zhao Hanjun; 髙野 勇太; Vasudevan; Pillai Biju
化学系学協会北海道支部2023年冬期研究会, 2023年01月25日, 英語, 口頭発表(一般)
2023年01月25日 - 2023年01月25日 - Homogeneous MAPbBr3 Microcrystals Prepared by Controlling the Crystal Growth Thermodynamics
D. Zhang; V. P. Biju
化学系学協会北海道支部2023年冬期研究会, 2023年01月25日, 英語, 口頭発表(一般)
2023年01月25日 - 2023年01月25日 - Interfacial Electron Transfer From Methylammonium Lead Bromide Nanocrystals to a Ligand-Engineered C60 Acceptor
Akter Rumana; asudevan Pillai Biju
化学系学協会北海道支部2023年冬期研究会, 2023年01月25日, 英語, 口頭発表(一般)
2023年01月25日 - 2023年01月25日 - ロサミン骨格を利用した近赤外光温熱分子の開発
吉田 和矢; Vasudevan Pillai Biju; 髙野 勇太
化学系学協会北海道支部2023年冬期研究会, 2023年01月25日, 英語, ポスター発表
2023年01月25日 - 2023年01月25日 - Exciton and Free Electron Dynamicsin Hybrid Halide Perovskites
V. P. Biju
MATCON 2023, 2023年01月12日, 英語, 口頭発表(招待・特別)
2023年01月12日 - 2023年01月14日, [招待講演] - Roles of Additives and Solvent in the Formation of Homogeneous MAPbBr3 Microcrystals
D. Zhang; T. Okamoto; V. P. Biju
RIES international symposiumu"拓", 2022年12月05日, 英語, シンポジウム・ワークショップパネル(指名)
2022年12月05日 - 2022年12月06日 - Photoinduced Electron Transfer from Isolated MAPbBr3 Nanocrystals and Their Self-Assembled Films to C60-based Ligands
A. Rumana; S. Mahesha. Bhagyashree; S. Palyam; Y. Takano; V. P. Biju
RIES international symposiumu"拓", 2022年12月05日, 英語, シンポジウム・ワークショップパネル(指名)
2022年12月05日 - 2022年12月06日 - Near-Infrared Light Absorbing Dye Molecules for Photothermal Cancer Therapy
K. Yoshida; Y. Takano; V. P. Biju
RIES international symposiumu"拓", 2022年12月05日, 英語, ポスター発表
2022年12月05日 - 2022年12月06日 - π-Extended Porphyrin-based Photosensitizers for Singlet Oxygen Generation
Zhao Hanjun; 髙野 勇太; 宮武 由甲子; Vasudevan; Pillai Biju
RIES international symposiumu"拓", 2022年12月05日, 英語, ポスター発表
2022年12月05日 - 2022年12月06日 - Photoinduced Electron Transfer from FAPbI3 PNCs to Cyano Benzoquinones
K. Xu; S. Palyam; V. P. Biju
RIES international symposiumu"拓", 2022年12月05日, 英語, ポスター発表
2022年12月05日 - 2022年12月06日 - Photoinduced Electron Transfer from FAPbI3 PNCs to Chloro Benzoquinones
Q. Wang; S. Palyam; V. P. Biju
RIES international symposiumu"拓", 2022年12月05日, 英語, ポスター発表
2022年12月05日 - 2022年12月06日 - Crystal Size-Dependent Photoluminescence of Methylammonium Lead Bromide Perovskite
L. Duan; T. Okamoto; V. P. Biju
RIES international symposiumu"拓", 2022年12月05日, 英語, ポスター発表
2022年12月05日 - 2022年12月06日 - Relations of Oxygen and Electron Transfer to Photoluminescence of Methylammonium Lead Iodide Perovskite Nanocrystals
Chouhan Lata; Ghimire Sushan; Vasudevan Pillai Biju
日本化学会第99春季年会, 2019年03月16日, 英語, 口頭発表(一般) - Steady-state Spectroscopic Studies of the Kinetics of Singlet Oxygen Sensing by 9-Substituted Anthracene Derivatives
D. Sasikumar*, Y. Takano, K. Yuyama and V. P. Biju, 2019年03月16日, 英語, 口頭発表(一般) - Incessant and Intermittent Photoluminescence from Semiconductor Nanocrystals: Challenges and Prospects
V. P. Biju
MATCOM2019, 2019年03月14日, 英語, 口頭発表(招待・特別)
[招待講演] - Photosensitized generation of singlet oxygen by Rose Bengal and its reaction with 9-substituted Anthracene
V. P. Biju
化学系学協会北海道支部2019年冬季研究発表会, 2019年01月22日, 英語, ポスター発表 - Lifetime of Photogenerated Charge Carriers in 0-, 1-, 2- and 3D Perovskite Structures
V. P. Biju
化学系学協会北海道支部2019年冬季研究発表会, 2019年01月22日, 英語, ポスター発表 - Optical Control of Charge-Carrier Diffusion and Confinement in Perovskite Nanocrystal Films
V. P. Biju
化学系学協会北海道支部2019年冬季研究発表会, 2019年01月22日, ベンガル語, 口頭発表(招待・特別)
[招待講演] - Single Particle Microspectroscopic Detection of the Dynamics of Perovskite Nanocrystal Blinking
Vasudevan Pillai Biju
化学系学協会北海道支部2019年冬季研究発表会, 2019年01月20日, 英語, ポスター発表 - Crystallization of Methylammonium Lead Halide Perovskites Controlled by Laser Trapping at Solution Surface
K. Yuyama; J. M. Islam; V. P. Biju
APC2018, 2018年12月16日, 英語, 口頭発表(一般) - The Dynamics of Photogenerated Charge Carriers in Perovskite Nanocrystal Films
Sushant Ghimire; 柚山 健一; 髙野 勇太; Vasudevan; Pillai Biju
APC2018, 2018年12月16日, 英語, 口頭発表(一般) - Blinking Suppression of CdSe/ZnS Quantum Dots by Photoinduced Electron Transfer under Large Positive Free Energy Change
V. P. Biju
APC2018, 2018年12月16日, 英語, 口頭発表(招待・特別)
[招待講演] - Kinetic Studies of Singlet Oxygen sensing using 9-substituted anthracene derivatives; Comparison of coumarin conjugated anthracene with 9-methyl anthracene
D. Sasikumar; Y. Takano; K. Yuyama; V. P. Biju
The 19th RIES-HOKUDAI International Symposium, 2018年12月12日, 英語, ポスター発表 - Control of Perovskite Nanocrystal Oxidation by Charge Carrier Trapping
L. Chouhan; S. Ghimire; K. Yuyama; Y. Takano; V. P. Biju
The 19th RIES-HOKUDAI International Symposium, 2018年12月11日, 英語, ポスター発表 - Blinking Suppression in Quantum Dots by Electron Transfer under Large Positive Gibbs Energy Change
V. P. Biju
14th IUPAC International Conference on Novel Materials and their Synthesis, 2018年09月21日, 英語, 口頭発表(招待・特別)
[招待講演] - 酸性条件下でのニワトリ卵白リゾチームの光捕捉挙動
柚山 健一; Islam Md Jahidul; Biju Vasudevan Pillai
2018年光化学討論会, 2018年09月05日, 英語, ポスター発表
[国内会議] - Crystallization of mixed chloride-bromide methylammonium lead perovskites by optical trapping at solution surface
Md Jahidul Islam; Kenichi Yuyama; Katsuaki Konishi; Biju Vasudevan Pillai
2018年光化学討論会, 2018年09月05日, 英語, ポスター発表
[国内会議] - Electron Transfer under Large Positive Gibbs Energy: Highly-excited Quantum Dots for Energy Harnessing and Photocatalysis
Biju Vasudevan Pillai
水素社会のための第3回国際シンポジウム, 2018年08月22日, 英語, シンポジウム・ワークショップパネル(公募)
[招待講演], [国内会議] - Photoluminescence of Semiconductor Quantum Dots: The Roles of Electron Donors/Acceptors and Incident Photon Flux
Biju Vasudevan Pillai
NANO2018, 2018年06月24日, 英語, 口頭発表(基調)
[招待講演], [国際会議] - Extended Diffusion of Charge Carriers in Perovskite Nanocrystal Assembly
Sushant GHIMIRE; Lata CHOUHAN; Ken-ichi YUYAMA; Yuta TAKANO; Vasudevan Pillai Biju
日本化学会第98春季年会2018, 2018年03月20日, 英語, 口頭発表(一般)
[国内会議] - Semiconductor Quontum Dots in Bioimagion: Progress and Challenges
Biju Vasudevan Pillai
9th Bangalore India NANO, 2017年12月07日, 英語, 口頭発表(招待・特別)
[招待講演], [国際会議] - Semiconductore Quantum Dots for Single-molecule Detections in Living Cells: Challenges and Progress
Biju Vasudevan Pillai
Nanobiotechnology, 2017年12月06日, 英語, 口頭発表(招待・特別)
[招待講演], [国際会議] - Semiconductor Quantum Dots in Single Molecule Detections: Prospects and challenges
Biju Vasudevan Pillai
ICPA, 2017年11月10日, 英語, 口頭発表(招待・特別)
[招待講演], [国際会議] - Quantum Dots for Single Molecule Detections: Recent Progress and Challenges
Biju Vasudevan Pillai
Nanoscale, 2017年10月27日, 英語, 口頭発表(招待・特別)
[招待講演], [国際会議] - Single molecule detections &Bioimaging using Semiconductor Nanocrystals.
Biju Vasudevan Pillai
Emerging Frontiers in Chemical Science 2017, 2017年09月23日, 英語, 口頭発表(一般)
[国際会議] - A Few Intracellular Pathways Of Quantum Dot Bioconjugates
Biju Vasudevan Pillai
MAF2017, 2017年09月12日, 英語, 口頭発表(招待・特別)
[招待講演], [国際会議] - A fluorescence sensor for real-time monitoring of singlet oxygen
Reiko Kohara; Biju Vasudevan Pillai
日本化学会第97回春季年会(2017), 2017年03月16日, 英語, 口頭発表(一般)
[国内会議] - Luminescent Semiconductor Nanocrystals: Challenges and Prospects
Biju Vasudevan Pillai
International Symposium on “New Trends in Applied Chemistry" (NTAC2017), 2017年02月09日, 英語, 口頭発表(招待・特別)
[招待講演], [国際会議] - Selective and sensitive detection of singlet oxygen using a novel fluorogenic molecular sensor
Reiko Kohara; Biju Vasudevan Pillai
The 17th RIES-HOKUDAI INTERNATIONAL SYMPOSIUM on JU, 2016年12月13日, 英語, ポスター発表
[国際会議] - Luminescent Quantum Dots in Biomaging
Biju Vasudevan Pillai
The 17th RIES-HOKUDAI INTERNATIONAL SYMPOSIUM on JU, 2016年12月13日, 英語, 口頭発表(招待・特別)
[招待講演], [国際会議] - Blinking and Bleaching Quantum Dots in Single-molecule Detections
Biju Vasudevan Pillai
Asian Photochemistry Conference 2016, 2016年12月04日, 英語, 口頭発表(招待・特別)
[招待講演], [国際会議] - Impeding Oxidation and Blinking in Single Semiconductor Quantum Dots
Biju Vasudevan Pillai
Department of Applied Chemistry Seminar, 2016年11月04日, 英語, 公開講演,セミナー,チュートリアル,講習,講義等
[招待講演], [国内会議] - Fluorescence Sensing of Nanomaterials by Photosensitization Reactions
Biju Vasudevan Pillai
Asia Nano 2016, 2016年10月10日, 英語, ポスター発表
[国際会議] - Incessant and Intermittent Photoluminescence of Quantum Dots in Single Molecule Detections
Biju Vasudevan Pillai
AsiaNANO2016, 2016年10月10日, 英語, 口頭発表(招待・特別)
[招待講演], [国際会議] - Single-molecule Detection using Quantum Dot Labels: Challenges and Prospects
Biju Vasudevan Pillai
HOKUDAI-NCTU Joint Symposium on Nano, Photo and Bio Sciences in 2016, 2016年10月04日, 英語, 口頭発表(招待・特別)
[招待講演], [国際会議]
- 環境解析学総論, 2024年, 修士課程, 環境科学
- 大学院共通授業科目(教育プログラム):One program for Global Goals, 2024年, 修士課程, 大学院共通科目
- 再生可能エネルギー総論, 2024年, 修士課程, 環境科学
- 光電子科学特論Ⅰ, 2024年, 修士課程, 環境科学院
- 環境物質科学特別講義Ⅳ, 2024年, 修士課程, 環境科学院
- ナノ共振器-プラズモン強結合を用いた高効率光反応システムの開拓とその学理解明
科学研究費助成事業 特別推進研究
2018年04月23日 - 2023年03月31日
三澤 弘明; 笹木 敬司; 上野 貢生; Biju V・Pillai; 村越 敬
電磁場シミュレーションにより、本モード強結合とアンサンブル強結合との差異に関する理解を深めた。その中で、金ナノディスクの密度が比較的低い状態においては、結合強度がアンサンブル強結合と同様ディスク数の1/2乗に比例して増強されることを確認したが、数密度が増大して金ナノディスク間距離が近接すると近接場相互作用により、結合強度がアンサンブル強結合に比べて増強することを明らかにし、実験的にもそれを確認した。
また、金ナノディスクの数密度が低い状態において吸収スペクトル、および近接場スペクトルが飽和する現象を解明するため、単一金ナノディスクをナノ共振器に結合させた状態をシミュレーションし、その分裂エネルギーから得られる空間のサイズを求めた。その結果、別途求めた金ナノディスクの消光断面積などと比較して一桁程度大きな値が得られ、この空間に存在する金ナノディスクが共振器と空間的にコヒーレントに結合するコヒーレンスエリアとなっていると推論している。さらに、フェムト秒過渡吸収測定から結合強度を増強させると、非強結合電極では見られない金から酸化チタンへの電子注入が増強されることを実験的に検証した。
また、金-銀合金ナノ粒子を用いてナノ共振器と結合させたところ結合強度が金の場合に比べて2倍程度増強し、「超強結合」となることを明らかにした。さらに、本超強結合電極を用いて水を電子源とする光電流を測定したところ、金と比べて2倍程度増強されること、またフェムト秒過渡吸収より金から酸化チタンへの電子注入が増強していることを明らかにした。
さらに、強結合電極の最適化を図るため、水の酸化反応の助触媒としてコバルト酸化物を金ナノ粒子の近傍に空間選択的に形成させ、反応効率を2倍以上増強することに成功した。また、キノコ型の金ナノ粒子を用いて近接場の空間制御を行い、反応効率を30%増強することにも成功した。
日本学術振興会, 特別推進研究, 北海道大学, 18H05205 - Defect-free, Highly-luminescent and Non-blinking Perovskite Nanocrystals
科学研究費助成事業 基盤研究(B)
2019年04月 - 2023年03月
Biju V・Pillai
The research focused on defect passivation of lead halide perovskite nanocrystals (PNCs), quantum dots (PQDs), and microcrystals (PMCs), to develop defect-free LHPs. In this project, cesium (Cs)-, formamidinium (FA)-, and methylammonium (MA) lead bromide and iodide PNCs, PQDs, and PMCs with the visible-to-near infrared emission were synthesized by solution processing (colloidal synthesis), laser trapping (spatiotemporally controlled synthesis), or inverse temperature crystallization. The as-synthesized PNCs, PQDs, and PMCs showed short photoluminescence (PL) lifetimes, low PL intensities, and intense PL blinking. These poor characteristics are attributed mainly to ionic defects, forming deep traps in the bandgap and promoting nonradiative exciton recombination. Thus, this research focussed on the halide defect filling in PNCs, PQDs, and PMCs. Halide defect filling was carried out in single PNCs, single PQDs, and single PMCs by observing the PL lifetime, PL intensity, and PL blinking in real-time. The defect filling in single PNCs and PQDs provided PL quantum efficiency as high as 96% with near-complete blinking suppression. The defect filling in PMCs increased the PL lifetime and intensity, which further helped engineer the bandgap in perovskites. Thus, this research progressed to the realization of defect filling in halide perovskites and achievement of perovskite NCs, PQDs, and PMCs with longer PL lifetimes and higher PL intensities, or better quantum efficiencies than the as-synthesized halide perovskites.
日本学術振興会, 基盤研究(B), 北海道大学, 19H02550 - One and multiple photon induced generation and stabilization of multi-excitons in quantum dot superlattices
新学術領域研究 研究領域提案型
2017年04月 - 2019年03月
Biju Vasudevan Pillai
This project accomplished two key goals: (1) controlled the photoluminescence blinking of quantum dots (CdSe-ZnS QDs) by the scavenging of deep holes generated in highly-excited QDs, which was by electron transfer beyond the limitations of Marcus Theory, and (2) generated and stablished multiple charge carriers in lead halide perovskite nanocrystals (PNCs), which was by the preparation of superlattices of PNCs. The above two results became possible by controlling the numbers of excitation photons, excitons generated and photoactivated nanocrystals. Blinking suppression in a QD and stabilization of charge carriers in PNC superlattices were accomplished by exceeding the conventional 1 photon: 1 exciton: 1 chromophore relation.
The above results were beyond the proposed goals, demonstrating (i) real-time blinking suppression in CdSe-ZnS QDs exposed to N,N-dimethylaniline (DMA), which was by electron transfer under a large positive Gibbs (free) energy change (ACS Nano 2018, 12, 9060) -beyond the expectations of Marcus theory. Furthermore, the blinking suppression was helpful for understanding and overcoming oxidation of PNCs (Angew. Chem. Int. Ed. 2019, 58, 4875). Also, this project accomplished optically-controlled amplified emission from PNC superlattices. Interestingly, under low-intensity excitation, a PNC superlattice showed unusually delayed emission (Angew. Chem. Int. Ed. 2017, 56, 1214), which became extremely fast and spatially confined at higher excitation intensities (ACS Energy Lett. 2018, 4, 133).
文科省, 新学術領域研究(研究領域提案型), 北海道大学, 競争的資金, 17H05243 - Efficient utilization of the excitation energy of highly-excited quantum dots for photoreactions
新学術領域研究 研究領域提案型
2015年04月 - 2017年03月
Biju Vasudevan Pillai
Aim of this project was to develop methods for efficient utilization of the energy of highly-excited nanoparticles (NPs) such as quantum dots (QDs) and perovskite nanocrystals (PNCs). Highly-excited NPs were generated by high-intensity laser irradiation. However, energy of such NPs is lost by ultrafast radiative and non-radiative recombination of photo-generated charge carriers. Therefore, extraction of absorbed energy towards practical applications is an important challenge. Here we developed photochemical and photophysical methods for extracting the energy of such NPs. At first, a part of the energy absorbed by QDs was extracted by activation of oxygen into singlet oxygen, which was followed by using singlet oxygen as the secondary energy source for chemical reactions. Here, we developed and used two novel singlet oxygen scavengers. Next, we applied highly-excited QDs to DNA molecules, which resulted in electron transfer from DNA to ionized QDs and formation of QD-DNA conjugates. Finally, we investigated stability of photo-generated charge carriers in highly-excited PNCs by preparation of self-assembled PNC structures. When compared with a PNC isolated in a solution, prolonged stability for photo-generated charge carriers was found for self-assembled structures, which is attributed to trapping or hopping of electrons and holes in or among PNCs. Successively, charge carriers in such PNCs were efficiently extracted by employing electron acceptors such as fullerene, which opens a method for efficient utilization of photoactivated PNCs for solar energy harvesting.
文科省, 新学術領域研究(研究領域提案型), 競争的資金, 15H01099 - 二量化、クラスタ構成、および膜受容体細胞内輸送に関する単一分子蛍光の研究
科学研究費助成事業 若手研究(B)
2012年04月01日 - 2015年03月31日
BIJU V・Pillai
本研究は、個々の細胞内での単一分子の時間ゲートおよび輝度ゲート蛍光イメージングに応じたEGFRの二量体化とクラスタリングの動態を調べた。初期段階ではEGF-EGFR-EGFR(ヘテロダイマー)とシグナル伝達二量体(EGF-EGFR)2が細胞内で均一に存在した。時間経過とともにシグナル伝達二量体が支配した、それはヘテロダイマーを犠牲にしてシグナル伝達二量体が形成されたことを示唆する。また、EGFRの小クラスタが約15分で出現し、細胞内取り込み前に数、量ともに増加した。結果、EGFRによる無制御シグナル伝達は、シグナル伝達二量体にヘテロダイマーの不均化抑制をすることにより抑制可能になる。
日本学術振興会, 若手研究(B), 独立行政法人産業技術総合研究所, 24750029 - 光分解性バイモーダルナノパーティクルの開発と、がんの可視化と治療への応用
2010年10月 - 2014年03月
国立研究開発法人 科学技術振興機構 さきがけ, 研究代表者 - 細胞機能を可視化する新奇な超分子ナノ材料の光創製
科学研究費助成事業 特別研究員奨励費
2011年 - 2013年
BIJU VasudevanPillai; SHIBU Edakkattuparambil
Our aim of this proposal is to develop a novel low-toxic, chemically stable, and highly-luminescent nanoparticles for single-molecule bio-sensing and -imaging using light as a resourceful tool. In this project, two types of novel fluorescent nanomaterials are prepared, which are fullerene-shelled CdSe-ZnS quantum dots and gold quantum clusters (Au25). Here, fullerene-shelled quantum dots are prepared by a photochemical method ; whereas, the quantum clusters are prepared by the alkaline reduction of gold ions within the pockets of bovine serum albumin. At first, a fullerene thiol molecule was synthesized by multi-step thermal chemical route. Subsequently, a monolayer of fullerene is prepared on the surface of QD by the tethering of the fullerene thiol to the ZnS surface through the S-S bonding. Finally, the fullerene thiol monolayer-protected QDs were immersed in excess fullerene thiol and photoactivated. We found the formation stable and thick fullerene shells on the surface of QDs, which is due to the 2+2 photocycloaddition reaction. Further, we characterized their photoluminescence properties at ensemble and single-molecule levels. The most interesting property of the fullerene-shelled QD is its ability to show suppressed blinking. While fullerene-shelled quantum dots show blinking suppression that is suitable for single-molecule bioimaging and solar energy harvesting ; bioconjugates of Au25 efficiently entered human cells and enabled us for obtaining NIR fluorescence images of live cells. The two types of fluorescent nanomaterials enabled us for establishing collaborations with four research groups in Japan. A part of this research is published in ACS Nano 6, 1601-1608, 2012.
日本学術振興会, 特別研究員奨励費, 独立行政法人産業技術総合研究所, 11F01504 - 発光性半導体ナノ結晶の点滅現象制御に関する研究
科学研究費助成事業 特定領域研究
2005年 - 2006年
石川 満; BIJU Vasudevan Pillai
孤立した1個の発光性量子ドットは、本質的に備えている断続的な発光の点滅現象を示すことが知られている。これは望ましくない特性なので、非点滅性の量子ドットは、時間に依存する生物的動的過程を連続的に研究する目的では要求が高い特性のひとつである。我々は単一量子ドットの点滅現象の制御に興味があり、量子ドット合成の反応温度や溶媒の種類と組成をパラメータとし、またカーボンナノチューブ、ポリマー、および金属あるいは半導体のナノ粒子を用いて、量子ドット表面を修飾した。本研究の重要な目的のひとつは、点滅を完全に抑制することである。表面の修飾により、量子ドットの発光特性が強く影響されること、そして、しばしば強く消光を起こすことを見出した。現時点で、CdSe量子ドットについて点滅の完全な抑制を達成していないものの、反応条件の制御および表面の装飾によって、下記のような重要な知見を得た。
白色発光を示すCdSe量子ドットが有機金属化合物のコロイド成長反応を用いて室温(23℃)で合成された。これらの量子ドットは粒径分布が均一にもかかわらず、発光スペクトルの半値幅が150nmと広いことが特異的である。再現性の高い発光量子収率として0.4が得られた。さらに、mercaptosuccinic酸を用いて、この量子ドットの表面を修飾して可水溶化することも可能であった。
量子ドットを用いたナノデバイスの開発では、種々の光および電子材料に量子ドットを制御して共役化させることが必要である。このような観点から、量子ドットを規則的に配置するための方法および量子ドットと共役化させた分子アセンブリの特性を評価することは重要である。本研究では、側壁を官能基で修飾した単層カーボンナノチューブにCdSe-ZnS量子ドットを共役化させ、それが量子ドットの発光特性に及ぼす影響を調べた。
日本学術振興会, 特定領域研究, 独立行政法人産業技術総合研究所, 17034068
