Nakajima, Atsushi

写真a

Affiliation

Faculty of Science and Technology, Department of Chemistry (Yagami)

Position

Professor

External Links

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)

  • 1999.04
    -
    2000.03

    東京都立大学大学院 非常勤講師

  • 2001.04
    -
    Present

    大学院理工学研究科委員

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Academic Background 【 Display / hide

  • 1984.03

    The University of Tokyo, Faculty of Science, 化学科

    University, Graduated

  • 1986.03

    The University of Tokyo, Graduate School, Division of Natural Science, 化学専攻

    Graduate School, Completed, Master's course

  • 1989.03

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

    Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide

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

 

Research Areas 【 Display / hide

  • Basic chemistry (Physical Chemistry)

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

 

Books 【 Display / hide

  • 最新 実用真空技術総覧 クラスタービーム生成

    NAKAJIMA ATSUSHI, ㈱産業技術サービスセンター, 2017

  • シリコンフラーレン

    NAKAJIMA ATSUSHI, 慶應義塾機関紙 三田評論, 2014

  • 現代界面コロイド科学の事典 10.4節「金属ナノクラスター」

    NAKAJIMA ATSUSHI, 丸善, 2010

    Scope: 240-241

  • 化学の考え方

    NAKAJIMA ATSUSHI, 岩波書店, 2008

  • ナノクラスター科学-機能ナノクラスターの創成と固定化-

    NAKAJIMA ATSUSHI, 三共出版, 2006

    Scope: 271-288

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Papers 【 Display / hide

  • Occupied and Unoccupied Levels of Half-Fluorinated and Perfluorinated Rubrene Thin Films Probed by One- And Two-Photon Photoemission

    Inoue T., Shibuta M., Suzuki T., Nakajima A.

    Journal of Physical Chemistry C (Journal of Physical Chemistry C)  124 ( 23 ) 12409 - 12416 2020.06

    ISSN  19327447

     View Summary

    © 2020 American Chemical Society. We measured occupied and unoccupied energy levels of half-fluorinated and perfluorinated rubrenes (C42F14H14, F14-RUB, and C42F28, PF-RUB) thin films prepared on a highly oriented pyrolytic graphite substrate by a combination of one- and two-photon photoemission spectroscopies. It is revealed that the energy levels near the Fermi level (EF) decrease when the fluorination degree increases, where the energies of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) are located at EF - 1.83 eV and EF + 0.9 eV for F14-RUB and EF - 2.51 eV and EF + 0.6 eV for PF-RUB, respectively. The HOMO-LUMO gaps corresponding to the energy for the creation of free photocarriers in molecular films - known as "transport gaps"- are evaluated by 2.7 eV for F14-RUB and 3.1 eV for PF-RUB.

  • Visualization of Surface Plasmons Propagating at the Buried Organic/Metal Interface with Silver Nanocluster Sensitizers

    Yamagiwa K., Shibuta M., Nakajima A.

    ACS Nano (ACS Nano)  14 ( 2 ) 2044 - 2052 2020.02

    ISSN  19360851

     View Summary

    © 2020 American Chemical Society. Visualization of surface plasmon polariton (SPP) propagation at dielectric/metal interfaces is indispensable in providing opportunities for the precise designing and controlling of the functionalities of future plasmonic nanodevices. Here, we report the visualization of SPPs propagating along the buried organic/metal interface of fullerene (C60)/Au(111), through dual-colored two-photon photoemission electron microscopy (2P-PEEM) which precisely visualizes the SPP propagation of plasmonic metal nanostructures. Although SPPs excited by near-infrared photons at the few monolayer C60/Au(111) interface are clearly visualized as interference beat patterns between the SPPs and incident light, faithfully reflecting SPP properties modulated by the overlayer, photoemission signals are suppressed for thicker C60 films, due to less valence electrons participating in 2P-photoemission processes. With the use of silver (Agn (n = 21 and 55)) nanoclusters, which exhibit enhancement of overall photoemission intensities due to localized surface plasmons functioning as SPP sensitizers, it is revealed that the 2P-PEEM is applicable to the imaging of SPPs for thick C60/Au(111) interfaces, where SPP properties are hardly modulated by the added small amount (∼0.1 monolayer) of Agn sensitizers.

  • Electronic properties of transition metal-benzene sandwich clusters

    Masubuchi T., Nakajima A.

    Theoretical Chemistry for Advanced Nanomaterials: Functional Analysis by Computation and Experiment (Theoretical Chemistry for Advanced Nanomaterials: Functional Analysis by Computation and Experiment)     313 - 349 2020.01

    ISSN  9789811500053

     View Summary

    © Springer Nature Singapore Pte Ltd. 2020. All rights reserved. Organometallic clusters composed of transition metal atoms and benzene molecules have been topics of great interest from both fundamental and technological points of view. In this chapter, we review the progress in the physical chemistry of transition metal-benzene clusters. The intrinsic properties of transition metal-benzene clusters as a function of cluster size are investigated by gasphase experiments, often in combination with quantum chemical calculations. In particular, vanadium-benzene clusters denoted VnBzm, showing magic numbers at m = n + 1, n, and n – 1, are characterized to possess multiple-decker sandwich structures, where vanadium atoms and benzene molecules are alternately piled up. Moreover, the discovery of such multiple-decker formation is a cornerstone in bottom-up approaches of molecular magnetism. The interplay of mass spectrometry, laser spectroscopies, and density functional calculations reveals that multiple-decker VnBzm clusters exhibit monotonic increase in magnetic moment with the number of layers. Anion photoelectron spectroscopic studies allow direct observations of the geometric and electronic structures of sandwich clusters and their anions. Major progress in this direction includes the recent characterization of tilted multipledecker sandwich cluster anions composed of manganese atoms and benzene molecules. The sandwich clusters with high-spin characteristics will hopefully be exploited as building blocks in advanced electronic and magnetic nanomaterials via controlled assembly.

  • Vibrational Spectra of Thiolate-Protected Gold Nanocluster with Infrared Reflection Absorption Spectroscopy: Size- And Temperature-Dependent Ordering Behavior of Organic Monolayer

    Yokoyama T., Hirata N., Tsunoyama H., Eguchi T., Negishi Y., Nakajima A.

    Journal of Physical Chemistry C (Journal of Physical Chemistry C)   2019

    ISSN  19327447

     View Summary

    © 2019 American Chemical Society. Vibrational spectra of thiolate-protected gold nanoclusters, prepared in a monolayer manner using the Langmuir-Blodgett method, were measured by means of infrared reflection absorption spectroscopy (IRAS). A transferred monolayer of gold nanoclusters ligated by dodecanethiolate or 2-phenylethane-1-thiolate onto a single-crystal gold (Au) surface of Au(111) exhibits worthy IRAS spectra that reveal temperature-dependent behaviors from 100 to 340 K as well as comprehensive peak assignments based on density functional theory calculations: the conformation change in ligands between all trans and gauche defect forms with temperature. In addition to the temperature dependence, the cluster size dependence of alkyl and phenyl moieties is discussed, compared with the IRAS spectra of the corresponding self-assembled monolayers (SAMs) on Au(111). Ligands spreading three-dimensionally from the Au core determine the coordination structure of the ligated Au nanoclusters.

  • Highly Dispersive Nearly Free Electron Bands at a 2D-Assembled C<inf>60</inf> Monolayer

    Shibuta M., Yamamoto K., Guo H., Zhao J., Nakajima A.

    Journal of Physical Chemistry C (Journal of Physical Chemistry C)   2019

    ISSN  19327447

     View Summary

    © 2019 American Chemical Society. Superatomic molecular orbitals (SAMOs), which are atom-like diffuse orbitals formed at a molecule, play an important role in controlling the electronic functionality at one-to three-dimensional (1D-3D) assemblies of organic nanomaterials because they form highly dispersive and nearly free electron (NFE) bands, such as a bulk metal, by mixing their wavefunctions with neighbors. Herein, we identify a series of delocalized SAMOs at a two-dimensional assembled C60 fullerene monolayer utilizing resonant angle-resolved two-photon photoemission spectroscopy and theoretical calculations. SAMOs exhibit distinct NFE band dispersion characteristics to be hybridized between the diffuse orbitals at a 2D-assembly, unlike the well-known frontier unoccupied π∗ orbitals with localized wave functions at the carbon framework of C60. Density functional theory calculations for the NFE bands quantitatively reproduce the experimental observations including their energies and effective electron masses. These NFE bands comprising SAMOs above the Fermi level dominate charge transfer or photofunctional properties at the 1D-3D molecular assemblies, particularly when the band energies are lowered through a doping strategy.

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

Reviews, Commentaries, etc. 【 Display / hide

  • Fabrication method for nanocluster superatoms with high-power impulse magnetron sputtering

    Tsunoyama Hironori, Tona Masahide, Tsukamoto Keizo, Nakajima Atsushi

    Journal of the Vacuum Society of Japan 60 ( 9 ) 352 - 361 2017

    Introduction and explanation (scientific journal), Joint Work,  ISSN  1882-2398

     View Summary

    <p>Intensive ion source for single-size nanoclusters was developed on the basis of high-power impulse magnetron sputtering (HiPIMS) technique combined with a low-pressure, low-temperature gas flow reactor. The nanocluster source exhibits superior characteristics originating from pulsed, high-power sputtering compared to conventional direct-current sputtering; (1) enhanced ion intensities, (2) fascicle tuning of nanocluster sizes, and (3) enhanced selectivity of stable, magic nanoclusters. The metallic (silver, platinum, and palladium) and binary (transition-metal and silicon) nanocluster ions in the size range of several to one hundred atoms can be generated with ion current of 100 pA to 10 nA (108 to 1011 nanoclusters/sec). The growth mechanism of nanoclusters in the source was also explained by the nucleation theory.</p>

Presentations 【 Display / hide

  • Monodispersed Immobilization and Island Formation of M@Si16 Superatom

    NAKAJIMA ATSUSHI

    The Cluster Surface Interactions 2016 Workshop (Argonne National Laboratory) , 2016.06, Oral Presentation(guest/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(key)

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

    NAKAJIMA ATSUSHI

    Pacifichem 2015 (Honolulu, Hawaii, USA) , 2015.12, Oral Presentation(guest/special)

  • Formation of binary superatom nanocluster monolayer

    NAKAJIMA ATSUSHI

    XXIV International Materials Research Congress (IMRC) on Clusters & Nanostructures (Cancun, Mexico) , 2015.08, Oral Presentation(guest/special)

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

    NAKAJIMA ATSUSHI

    2015 Gordon Research Conference (GRC) “Clusters and Cluster Assembled Materials” (Girona, Spain) , 2015.07, Oral Presentation(guest/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

  • 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

     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

  • 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

  • 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

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Intellectual Property Rights, etc. 【 Display / hide

  • ナノクラスター生成装置

    Application No.: 2013-112995  2013.05 

    Patent, Joint, National application

  • 多重レーザー照射による液滴試料の粉砕法

    Application No.: 2012-162131  2012.07 

    Patent, Joint, National application

  • “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”

    Application No.: 2012-0989620  2012.04 

    Patent, Joint, National application

  • 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

    Application No.: 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

    Application No.: 2016-033117   

    Patent, Joint

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Awards 【 Display / hide

  • 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: Awards of National Conference, Council and Symposium

  • 田中貴金属研究財団 シルバー賞

    2017.03

    Type of Award: Awards of Publisher, Newspaper Company and Foundation

  • The Chemical Society of Japan Award for Creative Work for 2008

    NAKAJIMA ATSUSHI, 2009.03, 社団法人 日本化学会, 複合クラスターを用いたナノスケール物質群の創製とその電子物性の解明

    Type of Award: Awards of National Conference, Council and Symposium

  • Chemical Physics Letters Most Cited Paper 2003-2007 Award

    2008.10, Elsevier

    Type of Award: International Academic Awards

  • 分子科学研究奨励森野基金研究奨励

    1997.08

    Type of Award: Awards of Publisher, Newspaper Company and Foundation

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Courses Taught 【 Display / hide

  • STATISTICAL THERMODYNAMICS (BASIC PHYSICAL CHEMISTRY 1)

    2021

  • STATISTICAL THERMODYNAMICS

    2021

  • STATISTICAL CHEMICAL THERMODYNAMICS EXERCISE

    2021

  • SEMINAR IN CHEMISTRY

    2021

  • QUANTUM STATISTICAL CHEMISTRY (PHYSICAL CHEMISTRY 2)

    2021

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Memberships in Academic Societies 【 Display / hide

  • 分子科学研究会, 

    2004.09
    -
    Present
  • ナノ学会, 

    2004.05
    -
    Present
  • 日本物理学会, 

    1984.03
    -
    Present
  • 日本化学会, 

    1983.10
    -
    Present

Committee Experiences 【 Display / hide

  • 2008.09
    -
    2010.08

    会長, 分子科学会

  • 2006.08
    -
    Present

    連携会員, 日本学術会議

  • 2004.09
    -
    2006.08

    Committee Chair, 分子科学研究会

  • 2004.05
    -
    Present

    Director, ナノ学会

  • 1984.03
    -
    Present

    Member, 日本物理学会

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