2013.4〜現在 慶應大学 (科研費若手B) 空間構造を取り込んだ光学応答理論: 振動分光への応用
The interaction between near-field and molecular vibrations.
2010.4〜現在 JST-ERATO, 慶應大学 有機金属複合ナノクラスターの電子物性と表面分光
The electronic properties of organometallic clusters and surface vibrational spectroscopy. 超原子ナノクラスター集積体の電子物性
The electronic properties of superatomic nanoclusters and superatom hetero-assembly.
2004〜2007 北大〜分子研 金チオラートクラスターの電子物性 (修士〜博士)
The geometric, electronic, and optical properties of gold-thiolate cluters.
Publications
T. Tsuji, N. Hosoya, S. Fukazawa, R. Sugiyama, T. Iwasa, H. Tsunoyama, H. Hamaki, N. Tokitoh, and A. Nakajima, Liquid-Phase Synthesis of Multidecker Organoeuropium Sandwich Complexes and Their Physical Properties, J. Phys. Chem. C, 118, 5896-5907 (2014).
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T. Tsuji, S. Fukazawa, R. Sugiyama, K. Kawasaki, T. Iwasa, H. Tsunoyama, N. Tokitoh, and A. Nakajima, Physical properties of mononuclear organoeuropium sandwich complexes ligated by cyclooctatetraene and bis(trimethylsilyl)cyclooctatetraene, Chem. Phys. Lett. 595-596, 144-150 (2014).
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T. Iwasa, K. Nobusada, and A. Nakajima, Electronic and Optical Properties of Vertex-Sharing Homo- and Hetero-Biicosahedral Gold Clusters, J. Phys. Chem. C, 117, 24586-24591 (2013).
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T. Iwasa and A. Nakajima, Geometric, Electronic, and Optical Properties of Monomer and Assembly of Endohedral Aluminum Superatomic Clusters, J. Phys. Chem. C, 117, 21551-21557 (2013).
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M. Nakaya, T. Iwasa, H. Tsunoyama, T. Eguchi, and A. Nakajima, Formation and Control of Ultrasharp Metal/Molecule Interfaces by Controlled Immobilization of Size-Selected Metal Nanoclusters onto Organic Molecular Films,
Adv. Funct. Mater. 24, 1202-1210 (2014).
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T. Iwasa and A. Nakajima, Geometric, electronic, and optical properties of a boron-doped aluminum cluster of B2Al21−: A density functional theory study,
Chem. Phys. Lett. 582, 100-104 (2013).
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T. Masubuchi, K. Ohi, T. Iwasa and A. Nakajima, Experimental and theoretical studies on the electronic properties of vanadium-benzene sandwich cluster anions, VnBzn+1− (n = 1-5),
J. Chem. Phys. 137, 224305 (2012) [9 pages].
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T. Iwasa and A. Nakajima, Geometric, Electronic, and Optical Properties of a Superatomic Heterodimer and Trimer: Sc@Si16-V@Si16 and Sc@Si16-Ti@Si16-V@Si16,
J. Phys. Chem. C, 116, 14071-14077 (2012).
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T. Iwasa, K. Horiuchi, M. Shikishima, Y. Noguchi, S. Nagaoka, and A. Nakajima, Theoretical Investigation of a Titanium-Aniline Complex with and without an Alkyl Chain,
J. Phys. Chem. C 115, 16574-16582 (2011).
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T. Iwasa and K. Nobusada, Near-field-induced optical force on a metal particle and C60: Real-time and real-space electron dynamics simulation,
Phys. Rev. A, 82, 043411 (2010) [6 pages].
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Y. Negishi, W. Kurashige, Y. Niihori, T. Iwasa and K. Nobusada, Isolation, structure, and stability of a dodecanethiolate-protected Pd1Au24 cluster,
Phys. Chem. Chem. Phys., 12, 6219-6225 (2010).
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T. Iwasa and K. Nobusada, Nonuniform light-matter interaction theory for near-field-induced electron dynamics,
Phys. Rev. A, 80, 043409 (2009) [11 pages].
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K. Nobusada and T. Iwasa, Oligomeric Gold Clusters with Vertex-Sharing Bi- and Triicosahedral Structures,
J. Phys. Chem. C (Letter), 111, 14279-14282 (2007).
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T. Iwasa and K. Nobusada, Gold-thiolate core-in-cage cluster Au25(SCH3)18 shows localized spins in charged states,
Chem. Phys. Lett. 441, 268-272 (2007).
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K. Ikeda, Y. Kobayashi, Y. Negishi, M. Seto, T. Iwasa, K. Nobusada, T.Tsukuda, and N. Kojima, Thiolate-Induced Structural Reconstruction of Gold Clusters Probed by 197Au Mossbauer Spectroscopy,
J. Am. Chem. Soc. (communications), 129, 7230-7231 (2007).
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T. Iwasa, and K. Nobusada, Theoretical Investigation of Optimized Structures of Thiolated Gold Cluster [Au25(SCH3)18]+,
J. Phys. Chem. C, 111, 45-49 (2007).
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(Invited) "Applications of multi-element gas-phase clusters: Surface functionalization and hetero-assembly" T. Iwasa and A. Nakajima, SOCNAM, March 4-7 2013, Jaipur, India.
"Theoretical calculations on heterodimer and heterotrimer of M@Si16" T. Iwasa and A. Nakajima,ISSPIC XVI, July 8-13 2012, Leuven, Belgium.
"A computational method for infrared reflection absorption spectroscopy" T. Iwasa、K. Horiuchi, M. Shikishima, Y. Noguchi, S. Nagaoka, and A. Nakajima,ISTCP-VII Waseda2011, Waseda University, Tokyo, Japan, September 2-8, 2011.
"Theoretical Investigation of Infrared Reflection Absorption Spectra of a Titanium-Aniline Complex Soft-Landed in Alkanethiol Self-Assembled Monolayer" T. Iwasa、K. Horiuchi, M. Shikishima, Y. Noguchi, S. Nagaoka, and A. Nakajima,American Conference on Theoretical Chemistry (ACTC) 2011, Telluride, Colorado, USA, July 17-22, 2011.
“Near-Field Excitation of Nanostructures: Nonuniform Light-Matter Interaction Theory”
Katsuyuki Nobusada, Takeshi Iwasa, International Symposium on “ Molecular Theory for Real Systems”, Fukui Institute for Fundamental Chemistry, Kyoto University, Japan, January 7-9, 2010.
“Near-field excitations of nanoparticles on the basis of the multipolar Hamiltonian” T. Iwasa and K. Nobusada, The 4th Winter School of Asian CORE Program, Seoul, Korea, December 13-15, 2009.
”Near-field excitations of nanoparticles on the basis of electronic structure theory” T. Iwasa and K. Nobusada,The 7th Asia-Pacific conference on Near-Field Optics (APNFO-7)、Jeju Island, Korea, November 25-27, 2009.
"Theory of nonuniform light-matter interaction: A time-dependent density functional theory approach" T. Iwasa and K. Nobusada, Hands-on Tutorial on Ab Initio Molecular Simulations: Toward a First-Principles Understanding of Materials Properties and Functions、Berlin、June 22-July 01, 2009.
(依頼講演)"Theoretical Study on Geometric, Electronic, and Vibrational Properties of Titanium-Aniline Complex" T. Iwasa、K. Horiuchi, M. Shikishima, Y. Noguchi, S. Nagaoka, and A. Nakajima、Frontier of Fundamental Surface Science 1st International Workshop for JST-ERATO Nakajima Designer Nanocluster Assembly Project, October 30, 2010.