• 5852 Citations
  • 43 h-Index
1987 …2019
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Research Output 1987 2019

  • 5852 Citations
  • 43 h-Index
  • 217 Article
  • 5 Conference contribution
  • 1 Chapter
  • 1 Review article
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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
4 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
13 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
8 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
13 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
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
10 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
24 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
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
21 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
4 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
21 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
9 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
15 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
10 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
9 Citations (Scopus)
Photoelectrons
Photons
Microscopy
Microscopic examination
Color
25 Citations (Scopus)

Size and structure dependence of electronic states in thiolate-protected gold nanoclusters of Au25(SR)18, Au38(SR) 24, and Au144(SR)60

Ohta, T., Shibuta, M., Tsunoyama, H., Negishi, Y., Eguchi, T. & Nakajima, A., 2013 Feb 21, In : Journal of Physical Chemistry C. 117, 7, p. 3674-3679 6 p.

Research output: Contribution to journalArticle

Nanoclusters
Electronic states
nanoclusters
Gold
gold
14 Citations (Scopus)
Electronic properties
Composite materials
Aromatic polymers
Magnetism
Electronic states