• 5906 Citations
  • 43 h-Index
1987 …2019
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Research Output 1987 2019

  • 5906 Citations
  • 43 h-Index
  • 217 Article
  • 5 Conference contribution
  • 1 Chapter
  • 1 Review article
2019

Enhanced oxygen reduction activity of platinum subnanocluster catalysts through charge redistribution

Tsunoyama, H., Ohnuma, A., Takahashi, K., Velloth, A., Ehara, M., Ichikuni, N., Tabuchi, M. & Nakajima, A., 2019 Jan 1, In : Chemical Communications. 55, 84, p. 12603-12606 4 p.

Research output: Contribution to journalArticle

Open Access
X ray absorption fine structure spectroscopy
Platinum
Density functional theory
Oxygen
Catalysts
2018
2 Citations (Scopus)

Characterization of floating-gate memory device with thiolate-protected gold and gold-palladium nanoclusters

Yokoyama, T., Hirata, N., Tsunoyama, H., Negishi, Y. & Nakajima, A., 2018 Jun 1, In : AIP Advances. 8, 6, 065002.

Research output: Contribution to journalArticle

nanoclusters
floating
palladium
gold
hysteresis

Formation of Highly Ordered Semiconducting Anthracene Monolayer Rigidly Connected to Insulating Alkanethiolate Thin Film

Eguchi, T., Hirata, N., Shibuta, M., Tsunoyama, H. & Nakajima, A., 2018 Nov 15, In : Journal of Physical Chemistry C. 122, 45, p. 26080-26087 8 p.

Research output: Contribution to journalArticle

Anthracene
anthracene
Monolayers
Self assembled monolayers
Thin films
1 Citation (Scopus)

Liquid-phase catalysis by single-size palladium nanoclusters supported on strontium titanate: Size-specific catalysts for Suzuki-Miyaura coupling

Tsunoyama, H., Ito, H., Komori, M., Kobayashi, R., Shibuta, M., Eguchi, T. & Nakajima, A., 2018 Jan 1, In : Catalysis Science and Technology. 8, 22, p. 5827-5834 8 p.

Research output: Contribution to journalArticle

Nanoclusters
Palladium
Strontium
Catalysis
Catalysts
1 Citation (Scopus)

Nitric oxide oxidation of a Ta encapsulating Si cage nanocluster superatom (Ta@Si16) deposited on an organic substrate; A Si cage collapse indicator

Shibuta, M., Niikura, T., Kamoshida, T., Tsunoyama, H. & Nakajima, A., 2018 Jan 1, In : Physical Chemistry Chemical Physics. 20, 41, p. 26273-26279 7 p.

Research output: Contribution to journalArticle

encapsulating
Nanoclusters
nitric oxide
nanoclusters
Nitric Oxide
1 Citation (Scopus)

Oxidative reactivity of alkali-like superatoms of group 5 metal-encapsulating Si16 cage nanoclusters

Shibuta, M., Kamoshida, T., Ohta, T., Tsunoyama, H. & Nakajima, A., 2018 Dec 1, In : Communications Chemistry. 1, 1, 50.

Research output: Contribution to journalArticle

Open Access
Nanoclusters
Alkalies
Silicon
silicon
Metals
5 Citations (Scopus)

Size-Effect on Electrochemical Hydrogen Evolution Reaction by Single-Size Platinum Nanocluster Catalysts Immobilized on Strontium Titanate

Tsunoyama, H., Yamano, Y., Zhang, C., Komori, M., Eguchi, T. & Nakajima, A., 2018 Jan 23, (Accepted/In press) In : Topics in Catalysis. p. 1-10 10 p.

Research output: Contribution to journalArticle

Nanoclusters
Strontium
Platinum
Hydrogen
Catalysts
16 Citations (Scopus)

Synthesis and Characterization of Metal-Encapsulating Si16 Cage Superatoms

Tsunoyama, H., Shibuta, M., Nakaya, M., Eguchi, T. & Nakajima, A., 2018 Aug 21, In : Accounts of Chemical Research. 51, 8, p. 1735-1745 11 p.

Research output: Contribution to journalArticle

Nanoclusters
Metals
Silicon
Molecular beams
Electrons

The stability of binary Al12X nanoclusters (X = Sc and Ti): Superatom or Wade's polyhedron

Tsunoyama, H., Akutsu, M., Koyasu, K. & Nakajima, A., 2018 Nov 19, In : Journal of Physics Condensed Matter. 30, 49, 494004.

Research output: Contribution to journalArticle

Nanoclusters
polyhedrons
nanoclusters
Anions
counting
2017
9 Citations (Scopus)

A designer ligand field for blue-green luminescence of organoeuropium(II) sandwich complexes with cyclononatetraenyl ligands

Kawasaki, K., Sugiyama, R., Tsuji, T., Iwasa, T., Tsunoyama, H., Mizuhata, Y., Tokitoh, N. & Nakajima, A., 2017, In : Chemical Communications. 53, 49, p. 6557-6560 4 p.

Research output: Contribution to journalArticle

Europium
Luminescence
Photoluminescence
Ligands
Electric fields
3 Citations (Scopus)

Anion Photoelectron Spectroscopy of Rubrene: Molecular Insights into Singlet Fission Energetics

Tsunoyama, H. & Nakajima, A., 2017 Sep 28, In : Journal of Physical Chemistry C. 121, 38, p. 20680-20686 7 p.

Research output: Contribution to journalArticle

Quantum chemistry
Electron affinity
Semiconducting organic compounds
Photoexcitation
Electronic states
15 Citations (Scopus)

Development of Integrated Dry-Wet Synthesis Method for Metal Encapsulating Silicon Cage Superatoms of M@Si16 (M = Ti and Ta)

Tsunoyama, H., Akatsuka, H., Shibuta, M., Iwasa, T., Mizuhata, Y., Tokitoh, N. & Nakajima, A., 2017 Sep 21, In : Journal of Physical Chemistry C. 121, 37, p. 20507-20516 10 p.

Research output: Contribution to journalArticle

encapsulating
Nanoclusters
Silicon
nanoclusters
Metals
1 Citation (Scopus)

Energy Level Alignment of Organic Molecules with Chemically Modified Alkanethiolate Self-Assembled Monolayers

Shibuta, M., Ogura, M., Eguchi, T. & Nakajima, A., 2017 Dec 14, In : Journal of Physical Chemistry C. 121, 49, p. 27399-27405 7 p.

Research output: Contribution to journalArticle

Self assembled monolayers
Fluorine
Electron energy levels
fluorine
energy levels
6 Citations (Scopus)

Fabrication and Characterization of Floating Memory Devices Based on Thiolate-Protected Gold Nanoclusters

Hirata, N., Sato, M., Tsunemi, E., Watanabe, Y., Tsunoyama, H., Nakaya, M., Eguchi, T., Negishi, Y. & Nakajima, A., 2017 May 25, In : Journal of Physical Chemistry C. 121, 20, p. 10638-10644 7 p.

Research output: Contribution to journalArticle

Nanoclusters
nanoclusters
Gold
floating
gold

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

Tsunoyama, H., Tona, M., Tsukamoto, K. & Nakajima, A., 2017, In : Journal of the Vacuum Society of Japan. 60, 9, p. 352-361 10 p.

Research output: Contribution to journalReview article

Nanoclusters
nanoclusters
Magnetron sputtering
impulses
magnetron sputtering
9 Citations (Scopus)

Geometric and electronic properties of Si-atom doped Al clusters: Robustness of binary superatoms against charging

Akutsu, M., Koyasu, K., Atobe, J., Miyajima, K., Mitsui, M., Tsunoyama, H. & Nakajima, A., 2017, In : Physical Chemistry Chemical Physics. 19, 31, p. 20401-20411 11 p.

Research output: Contribution to journalArticle

Electronic properties
charging
Atoms
electronics
atoms
3 Citations (Scopus)

Highly Ordered Self-Assembled Monolayers of Carboxy- and Ester-Terminated Alkanethiols on Au(111): Infrared Absorption and Hyperthermal-Deposition Experiments with Cr(benzene)2 Ions

Hirata, N., Suga, S., Noguchi, Y., Shibuta, M., Tsunoyama, H., Eguchi, T. & Nakajima, A., 2017 Mar 30, In : Journal of Physical Chemistry C. 121, 12, p. 6736-6747 12 p.

Research output: Contribution to journalArticle

infrared reflection
Infrared absorption
Self assembled monolayers
Benzene
infrared absorption
1 Citation (Scopus)

Photoexcited electron-transfer properties of C60 film on graphite and on Au(111) interfaces studied by two-photon photoemission spectroscopy

Shibuta, M., Yamamoto, K., Yamagiwa, K., Eguchi, T. & Nakajima, A., 2017, In : Chemistry Letters. 46, 10, p. 1528-1531 4 p.

Research output: Contribution to journalArticle

Graphite
Photoelectron spectroscopy
Photons
Electrons
Substrates
6 Citations (Scopus)

Photoexcited State Confinement in Two-Dimensional Crystalline Anthracene Monolayer at Room Temperature

Shibuta, M., Hirata, N., Eguchi, T. & Nakajima, A., 2017 Apr 25, In : ACS Nano. 11, 4, p. 4307-4314 8 p.

Research output: Contribution to journalArticle

Anthracene
anthracene
Monolayers
Crystalline materials
Excited states
4 Citations (Scopus)
Self assembled monolayers
Photoelectrons
polaritons
Microscopic examination
photoelectrons
2016
6 Citations (Scopus)
Quantum chemistry
Electron affinity
Electron injection
Semiconducting organic compounds
Photoelectron spectroscopy
11 Citations (Scopus)

Charge Transfer Complexation of Ta-Encapsulating Ta@Si16 Superatom with C60

Ohta, T., Shibuta, M., Tsunoyama, H., Eguchi, T. & Nakajima, A., 2016 Jul 21, In : Journal of Physical Chemistry C. 120, 28, p. 15265-15271 7 p.

Research output: Contribution to journalArticle

encapsulating
nanoclusters
Complexation
Charge transfer
X ray photoelectron spectroscopy
10 Citations (Scopus)

Direct observation of photocarrier electron dynamics in C60 films on graphite by time-resolved two-photon photoemission

Shibuta, M., Yamamoto, K., Ohta, T., Nakaya, M., Eguchi, T. & Nakajima, A., 2016 Oct 24, In : Scientific Reports. 6, 35853.

Research output: Contribution to journalArticle

pyrolytic graphite
photoelectric emission
graphite
photons
molecular orbitals
8 Citations (Scopus)
Nanoclusters
nanoclusters
Silver
Magnetron sputtering
magnetron sputtering
3 Citations (Scopus)

Imaging and spectromicroscopy of photocarrier electron dynamics in C60 fullerene thin films

Shibuta, M., Yamagiwa, K., Eguchi, T. & Nakajima, A., 2016 Nov 14, In : Applied Physics Letters. 109, 20, 203111.

Research output: Contribution to journalArticle

fullerenes
photons
thin films
electrons
pyrolytic graphite
1 Citation (Scopus)

Multiple-decker and ring sandwich formation of manganese-benzene organometallic cluster anions: Mn: nBzn - (n = 1-5 and 18)

Masubuchi, T., Iwasa, T. & Nakajima, A., 2016, In : Physical Chemistry Chemical Physics. 18, 37, p. 26049-26056 8 p.

Research output: Contribution to journalArticle

Organometallics
Manganese
Benzene
Anions
manganese
2015
27 Citations (Scopus)

Chemical Characterization of an Alkali-Like Superatom Consisting of a Ta-Encapsulating Si16 Cage

Shibuta, M., Ohta, T., Nakaya, M., Tsunoyama, H., Eguchi, T. & Nakajima, A., 2015 Nov 11, In : Journal of the American Chemical Society. 137, 44, p. 14015-14018 4 p.

Research output: Contribution to journalArticle

Photoelectron Spectroscopy
Nanoclusters
Alkalies
Oxygen
Graphite
7 Citations (Scopus)

Excitation and Relaxation Dynamics of Two-Dimensional Photoexcited Electrons on Alkanethiolate Self-Assembled Monolayers

Shibuta, M., Hirata, N., Matsui, R., Nakaya, M., Eguchi, T. & Nakajima, A., 2015 Oct 8, In : Journal of Physical Chemistry C. 119, 40, p. 22945-22953 9 p.

Research output: Contribution to journalArticle

Self assembled monolayers
Chain length
Electrons
excitation
electrons
9 Citations (Scopus)

Hard x-ray photoelectron spectroscopy using an environmental cell with silicon nitride membrane windows

Tsunemi, E., Watanabe, Y., Oji, H., Cui, Y. T., Son, J. Y. & Nakajima, A., 2015 Jun 21, In : Journal of Applied Physics. 117, 23, 234902.

Research output: Contribution to journalArticle

silicon nitrides
x ray spectroscopy
photoelectron spectroscopy
membranes
cells
15 Citations (Scopus)

Heterodimerization via the covalent bonding of Ta@Si<inf>16</inf> nanoclusters and C<inf>60</inf> molecules

Nakaya, M., Iwasa, T., Tsunoyama, H., Eguchi, T. & Nakajima, A., 2015 May 21, In : Journal of Physical Chemistry C. 119, 20, p. 10962-10968 7 p.

Research output: Contribution to journalArticle

Nanoclusters
nanoclusters
Atoms
Molecules
atoms

Interplay between experiments and calculations for organometallic clusters and caged clusters

Nakajima, A., 2015 Dec 31, International Conference of Computational Methods in Sciences and Engineering 2015, ICCMSE 2015. American Institute of Physics Inc., Vol. 1702. 090031

Research output: Chapter in Book/Report/Conference proceedingConference contribution

composite materials
chemical properties
sandwich structures
vanadium
physical properties
1 Citation (Scopus)

Preface to special issue on current trends in clusters and nanoparticles

Tsukuda, T., Terasaki, A. & Nakajima, A., 2015 May 21, In : Journal of Physical Chemistry C. 119, 20, p. 10795-10796 2 p.

Research output: Contribution to journalArticle

Nanoparticles
trends
nanoparticles
2014
22 Citations (Scopus)
Nanoclusters
nanoclusters
Microfluidics
Functional materials
synthesis
1 Citation (Scopus)
Photoemission
Electronic states
Self assembled monolayers
Excitons
Charge transfer
2 Citations (Scopus)
Vanadium
Benzene
Electronic properties
vanadium
Anions
7 Citations (Scopus)
Nanoclusters
nanoclusters
immobilization
Metals
Molecules
5 Citations (Scopus)

Formation and electronic structures of organoeuropium sandwich nanowires

Hosoya, N., Takegami, R., Suzumura, J. I., Yada, K., Miyajima, K., Mitsui, M., Knickelbein, M. B., Yabushita, S. & Nakajima, A., 2014 Sep 18, In : Journal of Physical Chemistry A. 118, 37, p. 8298-8308 11 p.

Research output: Contribution to journalArticle

Nanowires
Electronic structure
europium
nanowires
Europium
23 Citations (Scopus)

Formation of a superatom monolayer using gas-phase-synthesized Ta@Si16 nanocluster ions

Nakaya, M., Iwasa, T., Tsunoyama, H., Eguchi, T. & Nakajima, A., 2014 Dec 21, In : Nanoscale. 6, 24, p. 14702-14707 6 p.

Research output: Contribution to journalArticle

Nanoclusters
Monolayers
Gases
Ions
Cations
10 Citations (Scopus)
Lanthanoid Series Elements
Photoelectron spectroscopy
Electronic structure
Anions
Metals
13 Citations (Scopus)

Liquid-phase synthesis of multidecker organoeuropium sandwich complexes and their physical properties

Tsuji, T., Hosoya, N., Fukazawa, S., Sugiyama, R., Iwasa, T., Tsunoyama, H., Hamaki, H., Tokitoh, N. & Nakajima, A., 2014 Mar 20, In : Journal of Physical Chemistry C. 118, 11, p. 5896-5907 12 p.

Research output: Contribution to journalArticle

Europium
europium
liquid phases
Physical properties
physical properties
2 Citations (Scopus)

Physical properties of mononuclear organoeuropium sandwich complexes ligated by cyclooctatetraene and bis(trimethylsilyl)cyclooctatetraene

Tsuji, T., Fukazawa, S., Sugiyama, R., Kawasaki, K., Iwasa, T., Tsunoyama, H., Tokitoh, N. & Nakajima, A., 2014 Mar 18, In : Chemical Physics Letters. 595-596, p. 144-150 7 p.

Research output: Contribution to journalArticle

Lithium
Europium
Physical properties
lithium
physical properties
7 Citations (Scopus)

Probing of an adsorbate-specific excited state on an organic insulating surface by two-photon photoemission spectroscopy

Shibuta, M., Hirata, N., Eguchi, T. & Nakajima, A., 2014 Feb 5, In : Journal of the American Chemical Society. 136, 5, p. 1825-1831 7 p.

Research output: Contribution to journalArticle

Photoelectron Spectroscopy
Adsorbates
Photoelectron spectroscopy
Photons
Excited states

Wavelength dependence of water microdroplet shattering with dual IR lasers and dye sensitization

Sugiyama, A. & Nakajima, A., 2014, In : Zeitschrift fur Physikalische Chemie. 228, 4-5, p. 459-470 12 p.

Research output: Contribution to journalArticle

infrared lasers
fragmentation
Coloring Agents
dyes
Wavelength
2013
28 Citations (Scopus)

Advanced nanocluster ion source based on high-power impulse magnetron sputtering and time-resolved measurements of nanocluster formation

Zhang, C., Tsunoyama, H., Akatsuka, H., Sekiya, H., Nagase, T. & Nakajima, A., 2013 Oct 10, In : Journal of Physical Chemistry A. 117, 40, p. 10211-10217 7 p.

Research output: Contribution to journalArticle

Nanoclusters
Ion sources
nanoclusters
Time measurement
Magnetron sputtering

Development of cluster ion source based on modulated pulse power magnetron sputtering technique

Zhang, C. H., Tsunoyama, H., Akatsuka, H., Sekiya, H., Nagase, T. & Nakajima, A., 2013, 8th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems, IEEE NEMS 2013. p. 428-431 4 p. 6559764

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Silicon
Ion sources
Silver
Magnetron sputtering
Ions
16 Citations (Scopus)

Development of high-flux ion source for size-selected nanocluster ions based on high-power impulse magnetron sputtering

Tsunoyama, H., Zhang, C., Akatsuka, H., Sekiya, H., Nagase, T. & Nakajima, A., 2013, In : Chemistry Letters. 42, 8, p. 857-859 3 p.

Research output: Contribution to journalArticle

Nanoclusters
Ion sources
Magnetron sputtering
Ions
Fluxes
13 Citations (Scopus)

Electronic and optical properties of vertex-sharing homo- and hetero-biicosahedral gold clusters

Iwasa, T., Nobusada, K. & Nakajima, A., 2013 Nov 21, In : Journal of Physical Chemistry C. 117, 46, p. 24586-24591 6 p.

Research output: Contribution to journalArticle

Gold
Electronic properties
apexes
Optical properties
gold
7 Citations (Scopus)

Excited electron dynamics at ferrocene-terminated self-assembled monolayers on Au(1 1 1): Lengthened lifetime of image potential state

Hirata, N., Shibuta, M., Eguchi, T. & Nakajima, A., 2013 Mar 13, In : Chemical Physics Letters. 561-562, p. 131-136 6 p.

Research output: Contribution to journalArticle

Self assembled monolayers
photoelectric emission
life (durability)
Electrons
spectroscopy
10 Citations (Scopus)
Boron
Aluminum
Isomers
Electronic properties
Density functional theory
6 Citations (Scopus)

Geometric, electronic, and optical properties of monomer and assembly of endohedral aluminum superatomic clusters

Iwasa, T. & Nakajima, A., 2013 Oct 17, In : Journal of Physical Chemistry C. 117, 41, p. 21551-21557 7 p.

Research output: Contribution to journalArticle

Aluminum
Electronic properties
Optical properties
monomers
assembly