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Sakaguchi Norihito

Faculty of Engineering　Center for Advanced Research of Energy and Materials　Labratory of　Integrated Function MaterialsProfessor
Office of AdmissionsProfessor

Researcher basic information

■ Degree
  • 博士（工学）, 北海道大学
■ URL
researchmap URL■ Various IDs
J-Global ID■ Research Keywords and Fields
Research Keyword
  • Nano-analysis
  • Computer Simulation
  • Electron Microscopy
  • Materials Science
Research Field
  • Nanotechnology/Materials, Inorganic materials and properties
  • Nanotechnology/Materials, Nanostructural physics
  • Nanotechnology/Materials, Nanometer-scale chemistry
  • Energy Engineering, Nuclear engineering
  • Nanotechnology/Materials, Metallic material properties
■ Educational Organization

Career

■ Career
Career
  • Sep. 2025 - Present
    Faculty of Engineering, Hokkaido University, Professor
  • Apr. 2010 - Aug. 2025
    Faculty of Engineering, Hokkaido University, Associate Professor
  • Apr. 2004 - Mar. 2010
    CAREM, Hokkaido University, Associate Professor
  • Nov. 2002 - Mar. 2004
    CARET, Hokkaido University, Research Assistant
  • Apr. 2002 - Oct. 2002
    CARET, Hokkaido University, Teaching Associate
  • Apr. 1999 - Mar. 2002
    CARET, Hokkaido University, Research Fellow
  • Apr. 1996 - Mar. 1999
    Graduate School of Engineering, Hokkaido University, JSPS Research Fellow (DC1)
Educational Background
  • Apr. 1996 - Mar. 1999, Hokkaido University, Graduate School of Engineering, Division of Materials Science and Engineering
  • Apr. 1994 - Mar. 1996, Hokkaido University, Graduate School of Engineering, 物質工学専攻修士課程
  • Apr. 1991 - Mar. 1994, Hokkaido University, School of Engineering, 金属工学科
Committee Memberships
  • Mar. 2019 - Present
    日本金属学会北海道支部, 評議員, Society
  • Apr. 2010 - Present
    日本顕微鏡学会北海道支部, 幹事, Society
  • Apr. 2006 - Present
    日本顕微鏡学会, 分析電子顕微鏡分科会幹事, Society
  • Apr. 2014 - Mar. 2020
    日本金属学会, 会誌・欧文誌編集委員会査読委員, Society
  • Jun. 2017 - May 2019
    日本顕微鏡学会, 評議員, Society
  • Apr. 2011 - Mar. 2013
    日本金属学会, 分科会委員, Society
  • Mar. 2009 - Feb. 2011
    日本金属学会北海道支部, 評議員, Society
  • Mar. 2008 - Feb. 2010
    日本金属学会北海道支部, 幹事, Society
  • Apr. 2005 - Mar. 2009
    日本顕微鏡学会北海道支部, 監査, Society
  • Apr. 2003 - May 2005
    日本顕微鏡学会北海道支部, 会計幹事, Society

Research activity information

■ Papers
■ Other Activities and Achievements
■ Lectures, oral presentations, etc.
  • イオンスパッタリング時に導入される格子欠陥層のシミュレーション
    坂口紀史
    日本顕微鏡学会FIB技術先進システム研究会第5回研究会, 2025, Japanese, Invited oral presentation
    2025 - 2025, [Invited]
  • FIB加工中のイオン照射によるカスケード衝突とダメージ層形成
    坂口紀史
    第80回日本顕微鏡学会学術講演会, 2024, Japanese, Invited oral presentation
    2024 - 2024, [Invited]
  • イオン照射によるカスケード損傷と試料ダメージ
    坂口紀史
    日本顕微鏡学会FIB技術先進システム研究部会第一回研究会, 2023, Invited oral presentation
    2023 - 2023, [Invited]
  • 複合量子ビーム超高圧電子顕微鏡のこれまでとこれからの挑戦
    坂口紀史
    第79回日本顕微鏡学会学術講演会, 2023, Japanese, Invited oral presentation
    2023 - 2023, [Invited]
  • 試料作製によるダメージ形成のメカニズム
    坂口紀史
    日本顕微鏡学会第37回分析電子顕微鏡討論会, 2022, Invited oral presentation
    2022 - 2022, [Invited]
  • (S)TEM とEELS による物質の微細構造・局所電子状態評価
    坂口紀史
    2019年度触媒学会北海道支部札幌講演会『ナノ反応場を化学する』, 06 Dec. 2019, Japanese, Invited oral presentation
    [Invited], [Domestic Conference]
  • EELSによる物質の誘電関数測定に向けた検討
    坂口紀史; 國貞雄治
    日本顕微鏡学会第75回学術講演会, 17 Jun. 2019, Japanese, Invited oral presentation
    [Invited], [Domestic Conference]
  • Measurement of dielectric function of metal oxide by TEM-EELS
    N. Sakaguchi
    The Opening International Symposium of Next-Generation Microscopic Science, 04 Nov. 2014, English, Invited oral presentation
    [Invited], [International presentation]
  • 多結晶シリコン粒界における欠陥準位のEELS/第一原理電子状態計算による解析
    坂口紀史
    日本金属学会2014年春期（第154回）講演大会, Mar. 2014, Japanese, Invited oral presentation
    [Invited], [Domestic Conference]
  • 分析TEMによる粒界・界面の解析-有限プローブの影響-
    坂口紀史
    Gatan製品技術セミナー2014, Jan. 2014, Japanese, Public discourse
    [Invited], [Domestic Conference]
  • HRTEM/EELSと第一原理計算による金属／セラミックス界面の構造解析
    坂口紀史
    日本顕微鏡学会第56回シンポジウム, 2012, Japanese, Invited oral presentation
    [Invited], [Domestic Conference]
  • HVHRTEM と第一原理計算に基づくシリコン対応粒界の構造解析
    坂口紀史
    日本顕微鏡学会第54回シンポジウム, 2010, Japanese, Invited oral presentation
    [Invited], [Domestic Conference]
  • Atomic and Electronic Structures of Metal/Oxide Interface: HRTEM, EELS and Ab-Initio Calculation
    N. Sakaguchi
    The 6th Pacific Rim International Conference on Advanced Materials and Processing, 2007, English, Invited oral presentation
    [Invited], [International presentation]
■ Syllabus
  • 材料科学特論, 2024年, 修士課程, 工学院
  • 結晶電子顕微鏡解析学特論, 2024年, 修士課程, 工学院
  • 結晶電子顕微鏡解析学特論, 2024年, 修士課程, 工学院
  • 材料科学特論, 2024年, 博士後期課程, 工学院
  • 結晶電子顕微鏡解析学特論, 2024年, 博士後期課程, 工学院
  • 結晶電子顕微鏡解析学特論, 2024年, 博士後期課程, 工学院
  • 材料科学基礎英語, 2024年, 学士課程, 工学部
  • 応用数学Ⅱ, 2024年, 学士課程, 工学部
■ Affiliated academic society
  • THE JAPANESE SOCIETY OF MICROSCOPY
  • THE JAPAN INSTITUTE OF METALS
■ Research Themes
  • 熱・化学・CO2ルーピングによるエネルギーレス酸素置換/CO2回収システムの開発
    科学研究費助成事業 基盤研究(A)
    01 Apr. 2022 - 31 Mar. 2026
    能村 貴宏; 國貞 雄治; 坂口 紀史
    日本学術振興会, 基盤研究(A), 北海道大学, 22H00306
  • Development of exergy recuperating type oxygen production device with a micro-scale reaction heat circulation mechanism.
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
    01 Apr. 2019 - 31 Mar. 2022
    Nomura Takahiro
    Converting from air to pure oxygen utilization technology is essential for energy conservation and CO2 emission reduction in industrial sector. However, oxygen production by cryogenic distillation method is an excessively energy-consuming process. Therefore, an advanced O2 production process is required. Therefore, this study focused on the pressure swing adsorption method as an energy-saving oxygen production process, and aimed to develop an oxygen production device with a micro-scale reaction heat circulation mechanism. As a result, we succeeded in synthesizing a new oxygen storage material without hysteresis during oxygen adsorption and desorption. We also developed a reaction heat control device consisting of an oxygen storage material and a latent heat storage material, and confirmed the reaction heat control and circulation functions during oxygen absorption and desorption.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 19H02653
  • EELS analysis of surface plasmon vibrational modes as the origin of short-range Casimir force
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    01 Apr. 2018 - 31 Mar. 2021
    Sakaguchi Norihito
    In order to clarify the surface plasmon interaction between metal plates, which is important for the evaluation of the short-range Casimir force, we fabricated metal/insulator/metal (MIM) structure and analyzed the relationship between the the interaction energy and the gap spacing by EELS measurements. The surface plasmon resonance energies excited at the Ag/silica and Ag/alumina interface are 3.3 eV and 3.0 eV, respectively. In the MIM structure, the resonance energy shifted to the high energy side as the gap spacing became narrower. It was experimentally shown that the surface plasmon interaction has a significant effect on the Casimir effect between metal plates with a gap spacing of less than 100 nm.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, 18K04872
  • Control of Hydrogen Permeability of Ceramic Membranes
    Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
    01 Apr. 2017 - 31 Mar. 2019
    Kunisada Yuji; Sakaguchi Norihito; Watanabe Takumi
    We investigated the hydrogen permeability of various ceramic materials using a first principles-calculation based on a density functional theory. From the calculation results of hydrogen absorption in anion-deficient and -substituted ceramic materials, we show that Al2O3 and TiN show large positive absorption energies of hydrogen isotopes, which indicates that these ceramic materials are promising materials for hydrogen permeation barriers. We also investigated the hydrogen permeation in the boundary region of ceramic materials. We shows that the activation barriers of hydrogen diffusion strongly depend on boundary width of ceramic materials, which indicates that we can design new hydrogen permeable membranes and hydrogen separation membranes by controlling boundary structures of nanocrystalline ceramic materials.
    Japan Society for the Promotion of Science, Grant-in-Aid for Young Scientists (B), Hokkaido University, 17K14114
  • Nano-Structure 3D Atomic Imaging using Electron Diffraction
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
    10 Jul. 2014 - 31 Mar. 2019
    GOHARA Kazutoshi; SAKAGUCHI Norihito; UCHIDA Tsutomu; YAMAZAKI Kenji; MAEHARA Yosuke
    In order to clarify the active site with atomic resolution, we aimed at the development and application of atomic resolved nanostructure imaging method by electron microscope.
    In subject 1, we advanced the development of imaging using electron diffraction and construction of experimental method for application. Furthermore, we developed a new algorithm on the ensemble averaging method in real space and Fourier space. In subject 2, experimental verification of atomic resolved imaging using an aberration corrected electron microscope was carried out. Using X-ray diffraction together, several important results regarding structure and function were obtained for the several objects. In subject 3, we studied three-dimensional atomic resolved imaging of nanostructures on graphene. We succeeded in dispersing single atoms on graphene without agglomeration. Atomic arrangement and local electronic state of Pt atom were revealed. We found the active site of atoms, molecules and clusters.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Hokkaido University, 26105009
  • Development of coating on boiler tubes for higher efficient coal-fired generation plants
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
    01 Apr. 2014 - 31 Mar. 2018
    Kurokawa Kazuya
    The fundamental research on the development of the SiAlON coating technology superior in the abrasion and high-temperature corrosion resistance, that is applicable for boiler tubes for next-generation high efficiency coal-fired power plants, was carried out. New findings on adequate preparation of SiAlON for spray coating, improvement of bonding strength between SiAlON and heat-resistant alloys, and effects of additives on the growth process of deposited layer of the SiAlON in spray coating were obtained. In addition, new technique to clarify dopant distribution in SiAlON in atomic level was developed.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Tomakomai National College of Technology, 26249098
  • Development and evaluation on safety of Hybrid nano biomaterial for reconstruction for oral and maxillofacial region
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
    01 Apr. 2013 - 31 Mar. 2016
    YOKOYAMA ATSURO; AKASAKA Tsukasa; SATO Yoshinori; YAMAMOTO Satoru; TAKITA Hiroko; YUDASAKA Masako; SAKAGUCHI Norihito; SHIBA Kiyotaka
    Effects of CNHs on bone formation, surface modification of CNTs and CNHs on titanium and their characteristics on bone formation, and the distribution of CNHs to internal organs used for biomaterial locally were evaluated in this study. CNHs accelerated differentiation of bone marrow cells to osteoblasts by Oncostatin M. The surface modification with CNHs and CNTs increased osteogenesis on titanium. CNHs have not been distributed in other organs on the local delivery.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 25293389
  • Quatitative evaluation and experimantal verification on the effect of matrix microstructure on effective concentration of radiation point defect
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    28 Apr. 2011 - 31 Mar. 2015
    YAMASHITA SHINICHIRO; SAKAGUCHI Norihito; SEKIO Yoshihiro
    To provide a guidance for a reasonable material design to help developing new nuclear material, Fe-Cr-Ni ternary model alloy, each of which are main components of austenitic stainless steel, and high Ni alloy were investigated by means of in-situ observation during electron irradiation and microstructural observation for neutron-irradiated samples.
    Concentration and flux of point defect were quantitatively evaluated and then effective factors (minor additives and precipitate etc) of material engineering for suppressing radiation-induced segregation and retarding onset of void swelling were successfully extracted.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Japan Atomic Energy Agency, 23561024
  • 粒界制御法適用による高信頼性原子炉材料の開発
    原子力基礎基盤研究委託事業
    2011 - 2014
    渡辺精一; 坂口紀史; 柴山環樹; 粉川博之; 連川貞弘; 山下真一郎; 関尾佳弘; 竹田貴代子
    文部科学省, 原子力基礎基盤戦略研究イニシアティブ, 北海道大学, Coinvestigator
  • Fabrication of periodic array of silicide quantum dot in silicon substrate by metallic ion implantation
    Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research
    2012 - 2012
    SAKAGUCHI Norihito
    Fabrication of periodic array of silicide quantum dots in silicon wafer were carried out by means of ion implantation and direct wafer bonding. It was clarified that nodes of the screw dislocation network act as the preferential nucleation sites for the precipitate in silicon. The periodic array of silicon dioxide quantum dots was successfully fabricated by present method. It was suggested that low-damage ion implantation technique is required to make the silicide quantum dot array, because the surface degradation strongly affect to the feasibility of wafer bonding.
    Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research, Hokkaido University, Principal investigator, Competitive research funding, 23651087
  • Study of nano spatiotemporal dynamics on phase transformation in advanced materials by in situ observation technique
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
    2009 - 2011
    SHIBAYAMA Tamaki; WATANABE Seiichi; YATSU Shigeo; ITOH Yoshihiro; TOMIOKA Satoshi; NISHIYAMA Syusuke; NORIHITO Sakaguchi
    In this study, we carried out the development of in-situ observation experimental apparatus on nano spatiotemporal dynamics to combine the streak camera which had many successful results of the measurements in pico second phenomena on the laser inertial confinement fusion reaction at the target region of the fuel pellets and the various high speed CCD cameras in order to find out a solution of the only remaining issues to improve the temporal resolution and extend the recording time in TEM for three years from FY2009 to FY2011. We installed the newly developed experimental apparatus to our present TEM and investigate the crack initiation point or the multi crack propagation at the interface of the joint under electron irradiation and ion irradiation by recording in nano spatiotemporal resolution where so far it has not been done by us, and revealed the interaction between the multi crack paths which grew in high speed and nano sized defects.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 21241025
  • Formation of Al2O3 scale on low-Al heat resistant alloys by increasing aluminum outward diffusion flux
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
    2009 - 2011
    HAYASHI Shigenari; SAKAGUCHI Norihito
    Several Ni-low Al alloys with various metal coatings (-100nm) were oxidized at 1150℃ in air. Among the coating elements used in the present study, a thin Pt coating with the optimized heating treatment promoted the formation of Al_2O_3 scale on the Ni-14at%Al alloy. Al uphill outward diffusion was confirmed to occur after the heat treatment, and this Al outward diffusion was considered to cause the formation of Al_2O_3 scale on the Ni-low Al alloys.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Coinvestigator not use grants, Competitive research funding, 21360351
  • Synthesis and functional characterization of nanoballs via submerged glow-discharge plasma
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
    2008 - 2010
    WATANABE Seiichi; YASUDA Hidehiro; NIWASE Keisuke; NISIGUCHI Norihiko; OHSASA Kenichi; MIURA Seiji; SAKAGUCHI Norihito; YATSU Shigeo; KUROKAWA Kazuya; AKIYAMA Tomohiro
    Submerged glow-discharge plasma has been researched as a method of nanoparticles (nanoballs) synthesis method. We discovered the formation of metallic nanoballs during plasma electrolysis in 2007. The product that was obtained from the electrolyte plasma electrolysis was found to be uniformly-shaped spherical nanoballs. In this research, we investigate possible applications of the method to functional devise fabrication.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 20246094
  • Comprehensive study on material damage mechanism by experimental and theoretical methods and development of materials for high-energy quantum-beam field
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)
    2007 - 2010
    KAWAI Masayoshi; WATANABE Seiichi; KOKAWA Hiroyuki; KAWASAKI Akira; HASEGAWA Akira; KURISHITA Hiroaki; KIKUCHI Kenji; YOSHIIE Toshimasa; KAMIYAMA Takashi; HARA Nobuyoshi; YAMAMURA Tsutomu; FUTAKAWA Masatoshi; FUKAHORI Tokio; SAITO Shigeru; MAEKAWA Katsuhiro; ITO Takahiro; GOTO Takuya; SATO Koichi; HASHIMOTO Satoshi; TERASAWA Michitaka; WATANABE Yukinobu; XU Chao-Nan; ISHINO Shiori; SHIBAYAMA Tamaki; SAKAGUCHI Norihito; SHIMAKAWA Satoshi; NAO Takashi; IWASE Hiroshi; KANEKO Yoshihisa; KISHIDA Ippei; TAKENAKA Nobuyuki; NAKAI Kiyomichi
    The material in a high energy intense proton beam field receives damage due to an intense thermal shock and radiation. A shock damage process and influence were investigated experimentally and the easing method was drawn. Moreover, the simulation code which evaluates a radiation trauma theoretically was developed. Furthermore, our grain boundary engineering method has succeeded the four times increase in corrosion resistivity of various austenite stainless steels. New tungsten material developed with a ultra-fine grain powder has four times higher toughness than that of commercial tungsten and does ductility even at a room temperature. The quantitative method using the stress luminescence material in a shock experiment was devised to improve a material dynamics study.
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (S), High Energy Accelerator Research Organization, 19106017
  • In-situ TEM observation of nano-dynamics to point defects in crystals by a ultra high-speed CCD camera
    Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
    2004 - 2006
    SHIBAYAMA Tamaki; KINOSHITA Hiroshi; SAKAGUCHI Norihito; ETOH Takeharu
    In 2006, We investigated nano dynamics about irradiation defects and crack propagation of SiC/SiC composite material by a high-speed camera. Furthermore, we summarized results of in-situ TEM observation in the past three years. Accomplishment of our original purpose may be reached up to 70%, but it is thought that I clarified the purpose of this study enough. In addition, development of a pulse electron source of light to be based on a new idea by pulsed laser irradiation to a target in Germany, and to generate the electron which was high strength was done. The new electron microscope which...
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, Coinvestigator not use grants, Competitive research funding, 16360310
  • BWR環境下におけるIASCC挙動予測へ向けた計算科学的アプローチ
    科学研究費助成事業 若手研究(B)
    2004 - 2005
    坂口 紀史
    本年度は、まず照射誘起粒界偏析挙動予測に向けて、分子動力学と機構論的モンテカルロ法による計算解析結果を基に、内部組織発達に及ぼす欠陥クラスター形成の効果をより定量的に評価し、照射誘起粒界偏析コードの改良と、計算結果のデータベース化を行った。また、解析関数を用いて、粒界近傍での溶質濃度分布を照射量の関数として表すことに成功した。続いて、酸化皮膜成長のモデル化については、水-酸化皮膜-金属界面を無境界問題として取り扱う、Phase-field法に類似した手法を採用し、酸化皮膜成長過程を二次元で可視化することを試みた。さらに、酸化皮膜反応・成長に関して、Cr濃度をパラメータとした速度定数を与えることにより、実機環境で見られるような結晶粒界に沿った酸化皮膜の成長を再現することが可能であることが明らかとなった。また、酸化皮膜の擬似的な破壊(臨界皮膜厚を超えた酸化皮膜は応力集中により破壊する)機構を取り入れることにより、亀裂進展までを予測することが可能となった。この場合、酸化皮膜の破壊を律速するのは、酸化皮膜の成長速度と被膜先端部における応力集中の度合いとなるため、粒界におけるCr濃度の大小と粒界面と応力方向との兼ね合いにより、実機材で度々見られるクラックの偏向が生じることが十分予測される結果を得た。一方、三次元的なクラック進展の評価に関しては、計算時間と必要メモリー容量の制限により、大...
    日本学術振興会, 若手研究(B), 北海道大学, Principal investigator, Competitive research funding, 16760685
  • 金属材料における照射効果の定量化に関する研究
    科学研究費助成事業 特別研究員奨励費
    1998 - 1998
    坂口 紀史
    日本学術振興会, 特別研究員奨励費, 北海道大学, 96J01335