Nakajima, Atsushi

写真a

Affiliation

Faculty of Science and Technology, Department of Chemistry 基礎理工学専攻 (Yagami)

Position

Professor

Related Websites

External Links
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Career 【 Display / hide 】

  • 1989.04
    -
    1994.03

    大学助手(理工学部化学科)

  • 1994.04
    -
    1997.03

    大学専任講師(理工学部化学科)

  • 1997.04
    -
    2001.03

    大学助教授(理工学部化学科)

  • 2001.04
    -
    Present

    大学教授(理工学部化学科)

  • 2001.04
    -
    Present

    大学院理工学研究科委員

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Academic Background 【 Display / hide 】

  • 1980.04
    -
    1984.03

    The University of Tokyo, Faculty of Science, Department of Chemistry

    University, Graduated

  • 1984.04
    -
    1986.03

    The University of Tokyo, Graduate School, Division of Natural Science, Department of Chemistry

    Graduate School, Completed, Master's course

  • 1986.04
    -
    1989.03

    The University of Tokyo, Graduate School, Division of Natural Science, Department of Chemistry

    Graduate School, Completed, Doctoral course

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Academic Degrees 【 Display / hide 】

  • 理学士, The University of Tokyo, Coursework, 1984.03

  • 理学修士, The University of Tokyo, Coursework, 1986.03

  • Dr. Sc., The University of Tokyo, Coursework, 1989.03

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Matters concerning Career Achievements 【 Display / hide 】

  • 2001.10
    -
    2007.09

    大学学生総合センター委員(矢上支部)

  • 2006.04
    -
    2008.03

    大学院理工学研究科専修主任(機能デザイン科学)

  • 2008.04
    -
    2009.09

    大学理工学部企画室会議委員

  • 2009.04
    -
    2011.03

    大学理工学部学習指導副主任(化学科)

  • 2010.04
    -
    2013.09

    大学理工学部企画室会議委員

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Research Areas 【 Display / hide 】

  • Nanotechnology/Materials / Fundamental physical chemistry (Physical Chemistry)

  • Nanotechnology/Materials / Nanometer-scale chemistry

  • Nanotechnology/Materials / Functional solid state chemistry

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Research Keywords 【 Display / hide 】

  • ナノクラスター科学

  • ナノ機能表面科学

  • 不均一系精密触媒科学

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Research Themes 【 Display / hide 】

  • Nanocluster Assembled Material Science, 

    2009
    -
    2015

  • 科学技術振興機構　戦略創造プログラム(CREST) 研究課題「次世代光磁気材料を指向したナノデザイン制御」, 

    2002
    -
    2007

    　View Summary

    本研究では、多元的な化学組成の制御を通じて電子構造をデザインした複合ナノクラスターを創成し、このクラスターを機能単位とする二次元系ナノクラスター物質を、ナノメートルオーダーで周期的にデザイン制御した固体表面上への選択的なソフトランディングによって構築します。ナノデザイン制御されたクラスター物質での電

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Proposed Theme of Joint Research 【 Display / hide 】

  • 精密ナノクラスター触媒

    Interested in joint research with industry (including private organizations, etc.),  Desired form： Technical Consultation, Funded Research, Cooperative Research

    　View Summary

    金属や合金などの複合ナノクラスターを機能単位とする精密触媒作用を、実用材料に向けた応用展開を志向しております。

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Books 【 Display / hide 】

  • 最新 実用真空技術総覧

    中嶋 敦, エヌ・ティー・エス: ㈱産業技術サービスセンター, 2019.02,  Page： 1096

    Scope: クラスタービーム生成,  Contact page： 767-770

    　View Summary

    化学結合の違いに基づいたクラスターの種類とその生成法について概説した。

  • 日本化学会編「現代界面コロイド科学の事典」

    Atsushi Nakajima, 丸善, 2010.05,  Page： 292

    Scope: 10.4節「金属ナノクラスター」,  Contact page： 240-241

    　View Summary

    学際科学としてのコロイド界面科学の１つとして金属ナノクラスターの特徴を解説した。

  • Latest Advances in Atomic Cluster Collisions: Structure and Dynamics from the Nuclear to the Biological Scale

    Masaaki Mitsui, Shingo Doi, Kaori Ikemoto, Shuhei Nagaoka, Atsushi Nakajima, Imperial College Press, 2008.09,  Page： 442

    Scope: Infrared spectroscopy and thermal desorption study of vanadium–mesitylene 1:2 sandwich clusters soft-landed onto a long-chain N-alkanethiolate self-assembled monolayer

    　View Summary

    Gas-phase synthesized vanadium-mesitylene 1:2 V(mes)2 cluster cations were size-selectively deposited onto a long-chain alkanethiolate selfassembled monolayer-coated gold substrate under ultrahigh vacuum conditions. Examination of the resultant clusters was conducted by infrared reflection absorption spectroscopy (IRAS) and temperature programmed desorption (TPD), showing the clusters molecularly adsorbed and maintaining a sandwich structure on the substrate.

  • 岩波講座 現代化学への入門〈1〉「化学の考え方」

    Koji Kaya, Atsushi Nakajima, 岩波書店, 2008.01,  Page： 179

    Scope: 全範囲,  Contact page： 1-179

    　View Summary

    高校から大学への化学の橋渡しを念頭に、初等量子力学を交えて社会で使われる化学での基本的な考え方を解説した。

  • ライフコンジュゲートケミストリー - 暮らしと未来を支える化学 -

    Atsushi Nakajima, 三共出版, 2006.11,  Page： 320

    Scope: ナノクラスター科学

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Papers 【 Display / hide 】

  • Transition Metals in Silicon Cages: Shrinking to M@Si15 (M = Re, Os, Ir)

    T. Ichikawa, K. Terasaka, A. Sasaki, A. Nakajima

    Journal of Physical Chemistry Letters (American Chemical Society)  15 ( 46 ) 11678 - 11686 2024.11

    Research paper (scientific journal), Joint Work, Last author, Corresponding author, Accepted

    　View Summary

    The design of materials with intriguing electronic properties is crucial for advancing nanoscale technologies, where precise control over atomic structure and electronic behavior is essential. Metal-encapsulating silicon cage superatoms (SAs) provide a new paradigm for molecular-scale material design, allowing fine-tuning of both structure and electronic characteristics. The formation of superatoms mimicking halogens, noble gases, and alkali metals has been well-studied, particularly with M@Si16, where early transition metals from groups 3 to 5 stabilize within a Si16 cage, achieving a 68-electron configuration. For late transition metals with excess electrons, a Si15 cage offers enhanced stability by fulfilling the 68-electron rule with one fewer Si atom. This research synthesizes Si15 cage-SAs with rhenium (Re) from group 7 and iridium (Ir) from group 9 on p-type and n-type organic substrates. The stability of Re@Si15 and Ir@Si15 is evaluated via oxidative reactivity with X-ray photoelectron spectroscopy and theoretical calculations, including osmium (Os) from group 8. Re@Si15-, Os@Si150, and Ir@Si15+ exhibit superatomic behaviors similar to halogens, noble gases, and alkali metals due to the 68-electron shell closure. Among them, Re@Si15- on p-type organic substrates shows superior electronic and geometric properties. These findings advance our understanding of M@Sin systems for transition metals, addressing longstanding questions about their properties at n = 15 and 16.

  • Photoemission spectroscopy and microscopy for Ta@Si16 superatoms and their assembled layers

    M. Shibuta, T. Ohta, T. Kamoshida, K. Yamagiwa, H. Tsunoyama, T. Inoue, T. Masubuchi, A. Nakajima

    Nanoscale (Royal Chemical Society)  16 ( 47 ) 21837 - 21846 2024.10

    Research paper (scientific journal), Joint Work, Last author, Corresponding author, Accepted,  ISSN  20403364

    　View Summary

    Superatoms (SAs) with specific compositions have the potential to significantly advance the field of nanomaterials science, leading to next-generation nanoscale functionalities. In this study, we fabricated assembled layers with tantalum metal-atom encapsulating silicon cage (Ta@Si16) SAs on an organic C60 substrate through deposition, and we characterized their electronic and optical properties by photoelectron spectroscopy and microscopy. The alkaline nature of Ta@Si16 SAs reveals their electronic behaviors, such as charge transfer and electromagnetic near-field sensing, through two-photon photoemission (2PPE) spectroscopy and microscopy with a femtosecond laser. The evolution of the work function for Ta@Si16 SAs on C60, observed by 2PPE spectroscopy, demonstrates charge transfer complexation between the topmost C60 layer and the first Ta@Si16 layer, consistent with the electron-donating alkaline characteristics of Ta@Si16 SAs. Specifically, a small amount of Ta@Si16 SA deposition leads to a dramatic increase in 2PPE intensity, attributable to electromagnetic near-field enhancements, suggesting applications as sensitizers for nonlinear imaging in photoemission microscopy. For the assembled Ta@Si16 SA layers, a plasmonic response of hνp = 17.9 eV is spectroscopically identified, including their valence and conduction band structures, and the plasmonic energetics are discussed in the context of metal doping in bulk silicon.

  • Geometric and Electronic Properties of P Atom-Doped Al Nanoclusters: Alkaline-like Superatom of P@Al12

    M. Akutsu, K. Koyasu, K. Miyajima, M. Mitsui, T. Inoue, A. Nakajima

    Journal of Physical Chemistry A (American Chemical Society (ACS))  128 ( 32 ) 6648 - 6657 2024.08

    Research paper (scientific journal), Joint Work, Last author, Corresponding author, Accepted,  ISSN  10895639

    　View Summary

    The geometric and electronic characteristics of phosphorus-atom doped aluminum nanoclusters, AlnPm (n = 7-17, m = 1 and 2), were investigated through a combination of experiments and theoretical calculations. The size dependences of the ionization energy (Ei) for AlnPm NCs exhibit a local minimum of 5.37 eV at Al12P1, attributed to an endohedral P@Al12 superatom (SA). This SA originates from an excess electron toward the 2P shell closing (40e), coexisting with an exohedral isomer featuring a vertex P atom. The stability of the endohedral P@Al12 is further enhanced in its cationic state compared to the exohedral isomer, when complexed with a fluorine (F) atom, forming an SA salt denoted as P@Al12+F- with an elevated Ei ranging from 6.42 to 7.90 eV. In contrast, for the anionic Al12P1-, the exohedral form is found to be more stable than the endohedral one using anion photoelectron spectroscopy and calculations. The geometric and electronic robustness of neutral P@Al12 SAs against electron donation and acceptance is discussed in comparison to rare-gas-like Si@Al12 SAs.

  • Localized surface plasmon resonances of size-selected large silver nanoclusters (n = 70-100) soft-landed on a C60 organic substrate

    T. Inoue, K. Mizoguchi, M. Tokita, M. Shibuta, M. Nakaya, T. Eguchi, A. Nakajima

    Physical Chemistry Chemical Physics (Royal Society of Chemistry (RSC))  26 ( 23 ) 16597 - 16602 2024.05

    Research paper (scientific journal), Last author, Corresponding author, Accepted,  ISSN  14639076

    　View Summary

    2PPE spectroscopy for plasmonic response reveals the deformation to flattened geometries of Ag<sub>n</sub> nanoclusters on C<sub>60</sub> above n = 55.

  • Imaging of Ultrafast Photoexcited Electron Dynamics in Pentacene Nanocrystals on Graphite Substrat

    Masahiro Shibuta, Atsushi Nakajima

    Nanoscale (Royal Chemical Society)  16 ( 26 ) 12397 - 12405 2024.05

    Research paper (scientific journal), Accepted,  ISSN  20403364

    　View Summary

    Understanding molecular film growth on substrates and the ultrafast electron dynamics at their interface is crucial for advancing next-generation organic electronics. We have focused on studying the ultrafast photoexcited electron dynamics in nanoscale organic crystals of an aromatic molecule, pentacene, on a two-dimensional material of graphite substrate. Through the use of time-resolved two-photon photoelectron emission microscopy (2P-PEEM), we have visualized the ultrafast lateral evolution of photoexcited electrons. By resonantly tuning the incident photon to excite pentacene molecules, polarization-dependent 2P-PEEM has revealed that pentacene nanocrystals (sub- to several μm) on the substrate exhibit a preferential orientation, in which a molecular π-orbital contacts the substrate in a “lying flat” orientation, facilitating electron transfer to the substrate. The time-resolved 2P-PEEM captures the motion of excited electrons in a femto- to pico-second timescale, clearly imaging the ultrafast charge transfer and lateral expansion two-dimensionally on the graphite substrate. Moreover, we found that the lying-flat molecular orientation of pentacene nanocrystals is transformable into a “standing-up” one through gentle heating up to 50 °C. These experimental insights using time-resolved 2P-PEEM will be highly valuable in enhancing the photofunctionalities of organic electronic devices by controlled molecular deposition.

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Papers, etc., Registered in KOARA 【 Display / hide 】

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Reviews, Commentaries, etc. 【 Display / hide 】

  • Electronic properties of transition metal-benzene sandwich clusters

    T. Masubuchi, A. Nakajima

    Theoretical Chemistry for Advanced Nanomaterials - Functional Analysis by Computation and Experiment (Springer Nature)     313 - 349 2020.02

    Article, review, commentary, editorial, etc. (other), Joint Work, Last author, Corresponding author

  • Superatomic nanoclusters comprising silicon or aluminum cages

    A. Nakajima

    Physical Chemistry of Cold Gas Phase Functional Molecules and Clusters (Springer Nature)     195 - 222 2019.08

    Article, review, commentary, editorial, etc. (other), Single Work, Lead author, Corresponding author

  • Experimental method: Generation of cold gas-phase molecules, molecular ions, their clusters, metal clusters, and laser spectroscopy

    T. Ebata, Y. Inokuchi, A. Nakajima

    Physical Chemistry of Cold Gas Phase Functional Molecules and Clusters (Springer Nature)     3 - 32 2019.08

    Article, review, commentary, editorial, etc. (other), Joint Work, Last author

  • Formation of Superatom Monolayer Using Nanocluster Ion Source Based on High-Power Impulse Magnetron Sputtering

    A. Nakajima

    Encyclopedia of Interfacial Chemistry: Surface Science and Electrochemistry (Elsevier)  3   442 - 451 2018.05

    Article, review, commentary, editorial, etc. (other), Single Work, Lead author, Last author

  • 金属原子内包ケイ素ケージ化合物

    中嶋　敦

    ケイ素化学協会誌 (ケイ素化学協会)  35   5 - 10 2018

    Article, review, commentary, editorial, etc. (scientific journal), Single Work, Lead author, Last author, Corresponding author

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Presentations 【 Display / hide 】

  • Superatom Periodicity of Metal-Atom Encapsulated Silicon Cage Nanoclusters on Organic Substrates

    Atsushi Nakajima

    CSI 2024 – Cluster–Surface Interactions for Energy Applications, 

    2024.04
    , 

    Oral presentation (invited, special)

  • Monodispersed Immobilization and Island Formation of M@Si16 Superatom

    NAKAJIMA ATSUSHI

    The Cluster Surface Interactions 2016 Workshop (Argonne National Laboratory) , 

    2016.06
    , 

    Oral presentation (invited, special)

  • Alkali-Like Binary Superatom of a Ta-Encapsulating Si16 Cage

    NAKAJIMA ATSUSHI

    Symposium on Size Selected Clusters (S3C) 2016 (Davos, Switzerland) , 

    2016.03
    , 

    Oral presentation (keynote)

  • Nanocluster superatom formation using ion source based on high-power impulse magnetron sputtering

    NAKAJIMA ATSUSHI

    Pacifichem 2015 (Honolulu, Hawaii, USA) , 

    2015.12
    , 

    Oral presentation (invited, special)

  • Formation of binary superatom nanocluster monolayer

    NAKAJIMA ATSUSHI

    XXIV International Materials Research Congress (IMRC) on Clusters & Nanostructures (Cancun, Mexico) , 

    2015.08
    , 

    Oral presentation (invited, special)

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

  • 次世代光磁気材料を指向したナノデザイン制御

    2002.10
    -
    2007.09

    Keio University, Kobe University, Osaka University, Hiroshima University, University of Chicago, Argonne National Laboratory, -, Research grant, No Setting

  • Development of Sub-nanosized Aggregates Having Novel Optical Properties

    1997.07
    -
    2003.03

    Keio University, Kobe University, Tohoku University, Institute for Molecular Science, “Research for the Future (RFTF)” of the Japan Society for the Promotion of Science, Research grant, No Setting

    　View Summary

    We have successfully established several new methodologies to generate sub-nanosized aggregates having novel optical properties, and revealed fundamental properties of their electronic and geometrical structures as well as molecular aggregates bridging between gas and liquid/solid phases. New areas of “gas-phase organometallic chemistry” have been developed to create and to design new optoelectronic materials with our proposed soft-landing method.

  • Study of Magnetic Bottle Electron Spectrometer and Their Application

    1999.04
    -
    2004.03

    Keio University, Special Coordination Funds for the promotion of Science and Technology, Research grant, No Setting

  • ナノ生体触媒の創成を指向したニトロゲナーゼ酵素の鉄－硫黄活性中心のデザイン制御

    2003.04
    -
    2006.03

    慶應義塾大学, Grant-in-Aid for Scientific Research, Research grant, No Setting

  • 気相多元系合金クラスターの基板担持による触媒機能と電子物性の研究

    2001.04
    -
    2003.03

    Grant-in-Aid for Scientific Research, Research grant, No Setting

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Intellectual Property Rights, etc. 【 Display / hide 】

  • ナノクラスター生成装置

    Date applied： 2013－112995  2013.05 

    Patent, Joint

  • 多重レーザー照射による液滴試料の粉砕法

    Date applied： 2012-162131  2012.07 

    Patent, Joint

  • “マイクロミキサー、マイクロミキサーエレメント及びその製造方法”

    Date applied： 2012-0989620  2012.04 

    Patent, Joint

  • ナノクラスター分散液、ナノクラスター膜、ナノクラスター分散体の製造方法およびナノクラスター分散液の製造装置

    Date applied： 2015－160680   

    Patent, Joint

  • マイクロミキサー、マイクロミキサーエレメントおよびその製造方法

    Date applied： 2016-033117   

    Patent, Joint

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Awards 【 Display / hide 】

  • The Chemical Society of Japan Award

    2025.03, The Chemical Society of Japan, Functionalized Surface Chemistry through Precision-Controlled Nanocluster Immobilization

    Type of Award： International academic award (Japan or overseas)

  • 令和5年度　文部科学大臣表彰　科学技術賞　研究部門

    2023.04, 文部科学省, 複合ナノクラスター精密担持法によるナノ機能表面化学の研究

    Type of Award： Other

  • Humboldt Research Award

    2020.05, アレクサンダー・フンボルト財団

    Type of Award： International academic award (Japan or overseas)

  • 分子科学会賞

    2018.08, 分子科学会, 複合ナノクラスター科学の開拓－気相化学からナノ機能表面化学へ

    Type of Award： Award from Japanese society, conference, symposium, etc.

  • 田中貴金属研究財団 シルバー賞

    2017.03

    Type of Award： Award from publisher, newspaper, foundation, etc.

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Courses Taught 【 Display / hide 】

  • CHEMISTRY A

    2025

  • CHEMICAL REACTION KINETICS

    2025

  • BACHELOR'S THESIS

    2025

  • GRADUATE RESEARCH ON FUNDAMENTAL SCIENCE AND TECHNOLOGY 1

    2025

  • STATISTICAL THERMODYNAMICS (BASIC PHYSICAL CHEMISTRY 1)

    2025

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Memberships in Academic Societies 【 Display / hide 】

  • 分子科学会, 

    2004.09
    -
    Present

  • ナノ学会, 

    2004.05
    -
    2020.03

  • 日本物理学会, 

    1984.03
    -
    2024.03

  • 日本化学会, 

    1983.10
    -
    Present
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Committee Experiences 【 Display / hide 】

  • 2020.06
    -
    2022.05

    理事, 日本化学会

  • 2008.09
    -
    2010.08

    会長, 分子科学会

  • 2006.09
    -
    Present

    正会員, 分子科学会

  • 2006.08
    -
    Present

    連携会員, 日本学術会議

  • 2006.04
    -
    2010.03

    ディビジョン副査, 日本化学会

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