Updated on 2023/04/05

写真a

 
MATSUSHITA, Michio m.
 
Organization
Graduate School of Science Associate professor
Graduate School
Graduate School of Science
Undergraduate School
School of Science
Title
Associate professor
Contact information
メールアドレス

Degree 1

  1. Ph.D ( 1997.3   The University of Tokyo ) 

Research Interests 2

  1. Molecular systems with plasticity

  2. Organic Spintronics

Research Areas 2

  1. Nanotechnology/Materials / Structural organic chemistry and physical organic chemistry  / Molecular magnetism

  2. Nanotechnology/Materials / Organic functional materials  / Molecular electronics

Current Research Project and SDGs 2

  1. Coexisting system of magnetism and conductivity

  2. Organic conductive crystals with plasticity

Research History 7

  1. Nagoya University   Department of Chemistry, Graduate School of Science   Associate professor

    2008.4

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    Country:Japan

  2. The University of Tokyo   Department of Basic Science, Graduate School of Arts & Sciences   Assistant Professor

    2007.4 - 2008.3

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    Country:Japan

  3. The University of Tokyo   Department of Basic Science, Graduate School of Arts & Sciences   Assistant

    2000.11 - 2007.3

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    Country:Japan

  4. 科学技術振興事業団さきがけ研究21「状態と変革」   研究員

    1999.10 - 2002.9

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    Country:Japan

  5. Tokyo Metropolitan University   Department of Applied Chemistry, Graduate School of Engineering   Assistant

    1998.4 - 2000.10

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    Country:Japan

  6. Tokyo Metropolitan University   Department of Industrial Chemistry, Graduate School of Engineering   Assistant

    1997.7 - 1998.3

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    Country:Japan

  7. JSPS Research Fellow

    1997.4 - 1997.6

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    Country:Japan

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Education 3

  1. The University of Tokyo   Graduate School, Division of General Culture   Department of Basic Science

    1994.4 - 1997.3

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    Country: Japan

  2. The University of Tokyo   Graduate School, Division of Science

    1992.4 - 1994.3

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    Country: Japan

  3. Chiba University   Faculty of Science   Department of Chemistry

    1988.4 - 1992.3

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    Country: Japan

Professional Memberships 7

  1. The Chemical Society of Japan

  2. The Society of Polymer Science, Japan

  3. The Japanese Photochemistry Association

  4. Japan Society for Molecular Science

  5. The Physical Society of Japan

  6. 有機結晶部会

  7. 分子アーキテクトニクス研究会

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Awards 1

  1. 平成20年度分子科学会奨励賞

    2008.9   分子科学会  

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    Country:Japan

    受賞研究題目:有機ラジカルのスピンに基づく磁性-導電性共存系の構築

 

Papers 58

  1. Stabilization of Interfacial Polarization and Induction of Polarization Hysteresis in Organic MISIM Devices

    Yokokura Seiya, Tomimatsu Akihiro, Ishiguro Jun, Harada Jun, Takahashi Haruka, Takahashi Yukihiro, Nakamura Yuto, Kishida Hideo, Suizu Rie, Matsushita Michio M., Awaga Kunio

    ACS APPLIED MATERIALS & INTERFACES   Vol. 13 ( 27 ) page: 31928 - 31933   2021.7

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    Language:Japanese  

    DOI: 10.1021/acsami.1c08417

    Web of Science

  2. Electric and Thermosalient Properties of a Charge-Transfer Complex Exhibiting a Minor Valence Instability Transition

    Takahashi Yukihiro, Kondo Tsubasa, Yokokura Seiya, Takehisa Mika, Harada Jun, Inabe Tamotsu, Matsushita Michio M., Awaga Kunio

    CRYSTAL GROWTH & DESIGN   Vol. 20 ( 7 ) page: 4758 - 4763   2020.7

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    Language:Japanese  

    DOI: 10.1021/acs.cgd.0c00516

    Web of Science

  3. Chemical potentials of electric double layers at metal-electrolyte interfaces: dependence on electrolyte concentration and electrode materials, and application to field-effect transistors

    Nanjo Chihiro, Yokogawa Daisuke, Matsushita Michio M., Awaga Kunio

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   Vol. 22 ( 22 ) page: 12395 - 12402   2020.6

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    Language:Japanese  

    DOI: 10.1039/d0cp00423e

    Web of Science

  4. High Ambipolar Mobility in a Neutral Radical Gold Dithiolene Complex

    Mizuno Asato, Benjamin Helen, Shimizu Yasuhiro, Shuku Yoshiaki, Matsushita Michio M., Robertson Neil, Awaga Kunio

    ADVANCED FUNCTIONAL MATERIALS   Vol. 29 ( 42 )   2019.10

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    Language:Japanese  

    DOI: 10.1002/adfm.201904181

    Web of Science

  5. Ionic liquid thin layer-induced memory effects in organic field-effect transistors

    Eguchi Keitaro, Matsushita Michio M., Awaga Kunio

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   Vol. 21 ( 35 ) page: 18823 - 18829   2019.9

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    Language:Japanese  

    DOI: 10.1039/c9cp01647c

    Web of Science

  6. Rate-determining process in MISIM photocells for optoelectronic conversion using photo-induced pure polarization current without carrier transfer across interfaces

    Tomimatsu Akihiro, Yokokura Seiya, Reissig Louisa, Dalgleish Simon, Matsushita Michio M., Awaga Kunio

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   Vol. 21 ( 25 ) page: 13440 - 13445   2019.7

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    Language:Japanese  

    DOI: 10.1039/c9cp01221d

    Web of Science

  7. Electron Highways into Nanochannels of Covalent Organic Frameworks for High Electrical Conductivity and Energy Storage

    Wu Yang, Yan Dongwan, Zhang Zhongyue, Matsushita Michio M., Awaga Kunio

    ACS APPLIED MATERIALS & INTERFACES   Vol. 11 ( 8 ) page: 7661-7665   2019.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsami.8b21696

    Web of Science

  8. In Situ Real-Time Measurements for Ambipolar Channel Formation Processes in Organic Double-Layer Field-Effect Transistors of CuPc and F16CuPc

    Eguchi Keitaro, Matsushita Michio M., Awaga Kunio

    JOURNAL OF PHYSICAL CHEMISTRY C   Vol. 122 ( 45 ) page: 26054-26060   2018.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcc.8b08744

    Web of Science

  9. Multifunctional Dithiadiazolyl Radicals: Fluorescence, Electroluminescence, and Photoconducting Behavior in Pyren-1 '-yl-dithiadiazolyl

    Beldjoudi Yassine, Nascimento Mitchell A., Cho Yong Joo, Yu Hyeonghwa, Aziz Hany, Tonouchi Daiki, Eguchi Keitaro, Matsushita Michio M., Awaga Kunio, Osorio-Roman Igor, Constantinides Christos P., Rawson Jeremy M.

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   Vol. 140 ( 20 ) page: 6260-6270   2018.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jacs.7b12592

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  10. Influence of Air Exposure on Photocarrier Generation in Amorphous and Phase II Thin Films of Titanyl Phthalocyanine

    Eguchi Keitaro, Imai Yoshiaki, Matsushita Michio M., Awaga Kunio

    JOURNAL OF PHYSICAL CHEMISTRY C   Vol. 122 ( 14 ) page: 7731-7736   2018.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcc.8b00290

    Web of Science

  11. Giant negative magnetoresistance in Ni(quinoline-8-selenoate)(2)

    Black Nicholas, Daiki Tonouchi, Matsushita Michio M., Woollins J. Derek, Awaga Kunio, Robertson Neil

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   Vol. 20 ( 1 ) page: 514-519   2018.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c7cp06273g

    Web of Science

  12. 3D Spin-Liquid State in an Organic Hyperkagome Lattice of Mott Dimers

    Mizuno Asato, Shuku Yoshiaki, Matsushita Michio M., Tsuchiizu Masahisa, Hara Yuuki, Wada Nobuo, Shimizu Yasuhiro, Awaga Kunio

    PHYSICAL REVIEW LETTERS   Vol. 119 ( 5 )   2017.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevLett.119.057201

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  13. Negative differential resistance in the Peierls insulating phases of TTF-TCNQ

    Tonouchi Daiki, Matsushita Michio M., Awaga Kunio

    PHYSICAL REVIEW B   Vol. 96 ( 4 )   2017.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.96.045116

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  14. Fluorination induced electronic effects on a Pt(II) square-planar complex of the o-phenylenediimine ligand

    Pilia L., Matsushita M. M., Awagac K., Robertson N.

    NEW JOURNAL OF CHEMISTRY   Vol. 41 ( 13 ) page: 5487-5492   2017.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c7nj00394c

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  15. Molecular and thin film properties of cobalt half-sandwich compounds for optoelectronic application

    Reinhardt Maxwell, Dalgleish Simon, Shuku Yoshiaki, Reissig Louisa, Matsushita Michio M., Crain Jason, Awaga Kunio, Robertson Neil

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   Vol. 19 ( 9 ) page: 6768-6776   2017.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c6cp08685c

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  16. Cycle of charge carrier states with formation and extinction of a floating gate in an ambipolar tetracyanoquaterthienoquinoid-based field-effect transistor

    Itoh Takuro, Toyota Taro, Higuchi Hiroyuki, Matsushita Michio M., Suzuki Kentaro, Sugawara Tadashi

    CHEMICAL PHYSICS LETTERS   Vol. 671   page: 71-77   2017.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.cplett.2017.01.018

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  17. A perovskite based plug and play AC photovoltaic device with ionic liquid induced transient opto-electronic conversion Reviewed

    S. Karak, C. Nanjo, M. Odaka, K. Yuyama, G. Masuda, M. M. Matsushita, K. Awaga

    Journal of Materials Chemistry A   Vol. 4   page: 9019-9028   2016

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  18. Energy levels of metal porphyrins upon molecular alignment during layer-by-layer electrostatic assembly: scanning tunneling spectroscopy vis-´a-vis optical spectroscopy Reviewed

    B. Kundu, S. Chakrabarti, M. M. Matsushita, A. J. Pal

    RSC Advances   Vol. 6   page: 47410-47417   2016

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  19. Electrochemical deposition of highly-conducting metal dithiolene films Reviewed

    E. Allwright, G. Silber, J. Crain, M. M. Matsushita, K. Awaga, N. Robertson

    Dalton Transactions   Vol. 45h   page: 9363-9368   2016

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  20. Transport characteristics of the organic field-effect transistors based on charge transfer complex as semiconductors Reviewed

    S. Yokokura, Y. Takahashi, H. Hasegawa, J. Harada, T. Inabe, M. M. Matsushita, K. Awaga

    Journal of Nanoscience and Nanotechnology   Vol. 16   page: 3355-3359   2016

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  21. Discovery of the K4 Structure Formed by a Triangular π Radical Anion Reviewed

    A. Mizuno, Y. Shuku, R. Suizu, M. M. Matsushita, M. Tsuchiizu, D. M. Reta, F. Illas, V. Robert, K. Awaga

    J. Am. Chem. Soc.   Vol. 137   page: 7612-7615   2015

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  22. Photocurrent Generation in Organic Photodetectors with Tailor-Made Active Layers Fabricated by Layer-by-Layer Deposition

    B. Vonhoeren, S. Dalgleish,L. Hu, M. M. Matsushita, K. Awaga, B. J. Ravoo

    ACS Appl. Mater. Interfaces   Vol. 7   page: 7049-7053   2015

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  23. Organic optoelectronic interfaces with anomalous transient photocurrent Reviewed

    L. Hu, X. Liu, S. Dalgleish, M. M. Matsushita, H. Yoshikawa, K. Awaga

    J. Mater. Chem. C.   Vol. 3   page: 5122-5135   2015

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  24. Factors Affecting the Stability and Performance of Ionic Liquid-Based Planar Transient Photodetectors

    S. Dalgleish, L. Reissig, L. Hu, M. M. Matsushita, Y, Sudo, K. Awaga

    Langmuir   Vol. 31   page: 5235-5243   2015

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  25. Switching of Transfer Characteristics of an Organic Field-Effect Transistor by Phase Transitions: Sensitive Response to Molecular Dynamics and Charge Fluctuation Reviewed

    S. Yokokura, Y. Takahashi, H. Nonaka, H. Hasegawa, J. Harada, T. Inabe, R. Kumai, H. Okamoto, M. M. Matsushita, K. Awaga

    Chem. Mater.   Vol. 27   page: 4441-4449   2015

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  26. Ambipolar Transport in Phase-Separated Thin Films of p- and n-Type Vanadylporphyrazines with Two-Dimensional Percolation Reviewed

    Chihiro Nanjo, Takuya Fujimoto, Michio M. Matsushita, and Kunio Awaga

    J. Phys. Chem. C   Vol. 118   page: 14142-14149   2014

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  27. A new metal-organic hybrid material with intrinsic resistance-based bistability: monitoring in situ room temperature switching behavior Reviewed

    Zhongyue Zhang, Hanhua Zhao, Michio M. Matsushita, Kunio Awaga, and Kim R Dunbar

    J. Mater. Chem. C   Vol. 2   page: 399-404   2014

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  28. Giant Magnetoresistance in a Molecular Thin Film as an Intrinsic Property Reviewed

    Luca Pilia, Michele Serri, Michio M. Matsushita, Kunio Awaga, Sandrine Heutz, and Neil Robertson

    Adv. Func. Mater.   Vol. 24   page: 2383-2388   2014

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  29. Storage of an electric field for photocurrent generation in ferroelectric-functionalized organic devices Reviewed

    Laigui Hu, Simon Dalgleish, Michio M. Matsushita, Hirofumi Yoshikawa, and Kunio Awaga

    Nature Commun.   Vol. 5   page: 4279/1-4279/8   2014

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  30. Electron-transfer processes in highly-correlated electron systems of thiazyl radicals Reviewed

    Kunio Awaga, Kenji Nomura, Hideo Kishida, Wataru Fujita, Hirofumi Yoshikawa, Michio M. Matsushita, Laigui Hu, Yoshiaki Shuku, and Rie Suizu

    Bull. Chem. Soc. Jpn.   Vol. 87   page: 234-249   2014

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  31. Thiadiazole dioxide-fused picene: acceptor ability, anion radical formation, and n-type charge transport characteristics Reviewed

    Yongfa Xie, Yoshiaki Shuku, Michio M. Matsushita, and Kunio Awaga

    Chem. Commun.   Vol. 50   page: 4178-4180   2014

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  32. Chemical control of the monovalent-divalent electron-transfer phase transition in biferrocenium-TCNQ salts Reviewed

    Tomoyuki Mochida, Yusuke Funasako, Kousuke Takazawa, Masashi Takahashi, Michio M. Matsushita, and Tadashi Sugawara

    Chem. Commun.   Vol. 50   page: 5473-5475   2014

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  33. Synthesis, optical properties and charge transport characteristics of a series of novel thiophene-fused phenazine derivatives Reviewed

    Y. Xie, T. Fujimoto, S. Dalgleish, Y. Shuku, M. M. Matsushita, and K. Awaga

    J. Mater. Chem. C   Vol. 1   page: 3467-3481   2013

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  34. Ambipolar Carrier Injections Governed by Electrochemical Potentials of Ionic Liquids in Electric-Double-Layer Thin-Film Transistors of Lead- and Titanyl-Phthalocyanine Reviewed

    T. Fujimoto, M. M. Matsushita, and K. Awaga

    J. Phys. Chem. C   Vol. 117   page: 5552-5557   2013

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  35. Electric double layers allow for opaque electrodes in high performance organic optoelectronic devices Reviewed

    B. Li, S. Dalgleish, Y. Miyoshi, H. Yoshikawa, M. M. Matsushita, and K. Awaga

    Appl. Phys. Lett.   Vol. 101   page: 173302/1-173302/5   2012

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  36. Crystal Structure, Spin Polarization, Solid-State Electrochemistry, and High n-Type Carrier Mobility of a Paramagnetic Semiconductor: Vanadyl Tetrakis(thiadiazole)porphyrazine

    Y. Miyoshi, K. Takahashi, T. Fujimoto, H. Yoshikawa, M. M. Matsushita, Y. Ouchi, M. Kepenekian, V. Robert, M. P. Donzello, C. Ercolani, and K. Awaga

    Inorg. Chem.   Vol. 51   page: 456-462   2012

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  37. Ionic liquid component dependence of carrier injection and mobility for electric double layer organic thin film transistors for electronic device Reviewed

    T. Fujimoto, M. M. Matsushita, and K. Awaga

    J. Phys. Chem. C   Vol. 116   page: 5240-5245   2012

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  38. Highly efficient organic optoelectronic conversion induced by electric double layers in ionic liquids Reviewed

    B. Li, Y. Noda, L. Hu, H. Yoshikawa, M. M. Matsushita, and K. Awaga

    Appl. Phys. Lett.   Vol. 100   page: 163304/1-163304/4   2012

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  39. Utilizing Photocurrent Transients for Dithiolene-Based Photodetection: Stepwise Improvements at Communications Relevant Wavelengths Reviewed

    S. Dalgleish, M. M. Matsushita, L. Hu, B. Li, H. Yoshikawa, and K. Awaga

    J. Am. Chem. Soc.   Vol. 134   page: 12742-12750   2012

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  40. Planar Ni(II), Cu(II) and Co(II) tetraaza[14]annulenes. Structural, electronic and magnetic properties and application to field effect transistors Reviewed

    A. M. Whyte, Y. Shuku, G. S. Nichol, M. M. Matsushita, K. Awaga, and N. Robertson

    J. Mater. Chem.   Vol. 22   page: 17967-17975   2012

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  41. Photoconductivity and FET performance of an n-type porphyrazine semiconductor, tetrakis(thiadiazole)porphyrazine Reviewed

    Y. Miyoshi, T. Fujimoto, H. Yoshikawa, M. M. Matsushita, K. Awaga, T. Yamada, and H. Ito

    Org. Electronics   Vol. 12   page: 239-243   2011.2

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  42. Electrodeposition as a superior route to a thin film molecular semiconductor Reviewed

    S. Dalgleish, H. Yoshikawa, M. M. Matsushita, K. Awaga, and N. Robertson

    Chem. Sci   Vol. 2   page: 316-320   2011.1

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  43. Superperiodic conductance in a molecularly wired double-dot system self-assembled in a nanogap electrode Reviewed

    Y. Noguchi, T. Terui, Takuya Katayama, M. M. Matsushita, and T. Sugawara

    J. Appl. Phys.   Vol. 108   page: 094313   2010.7

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  44. Dual-gate field-effect transistors of octathio[8]circulene thin-films with ionic liquid and SiO2 gate dielectrics Reviewed

    T. Fujimoto, M. M. Matsushita, and K. Awaga

    Appl. Phys. Lett.   Vol. 97   page: 123303/1-123303/3   2010.6

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  45. Influence of Magnetic Field upon the Conductance of a Unicomponent Crystal of a Tetrathiafulvalene-Based Nitronyl Nitroxide Reviewed

    H. Komatsu, M. M. Matsushita, S. Yamamura, Y. Sugawara, K. Suzuki and T. Sugawara

    J. Am. Chem. Soc.   Vol. 132   page: 4528–4529   2010.3

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  46. Spintronics in organic p-electronic systems Reviewed

    Tadashi Sugawara and Michio M. Matsushita

    Journal of Materials Chemistry   Vol. 19   page: 1738-1753   2009

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  47. Electrochemical field-effect transistors of octathio[8]circulene robust thin films with ionic liquids Reviewed

    Fujimoto, Takuya; Matsushita, Michio M.; Awaga, Kunio

    Chemical Physics Letters   Vol. 483   page: 81-83   2009

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  48. Synthesis and properties of TSF-based spin-polarized donor Reviewed

    Komatsu, Hideji; Mogi, Ryoji; Matsushita, Michio M.; Miyagi, Tadashi; Kawada, Yuzo; Sugawara, Tadashi

    Polyhedron   Vol. 28   page: 1996-2000   2009

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  49. Controlling Co-tunneling Currents in Nanoparticle Networks Using Spin-Polarized Wire Molecules Reviewed

    P. Nickels, M. M. Matsushita, M. Minamoto, S. Komiyama, and T. Sugawara

    small   Vol. 4   page: 471-475   2008

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  50. Electrochemical and Electrochromic Properties of Octathio[8]circulene Thin Films in Ionic Liquids Reviewed

    Takuya Fujimoto, Michio M. Matsushita, Hirofumi Yoshikawa, and Kunio Awaga

    Journal of The American Chemical Society   Vol. 32   page: 17590-17591   2008

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  51. Association-mediated Chromism of Amphiphilic Triphenyl-6-oxoverdazyl Reviewed

    Kentaro Suzuki, Michio M. Matsushita, Hiroyuki Hayashi, Noboru Koga, and Tadashi Sugawara

    New Journal of Chemistry   Vol. 32   page: 2201-2208   2008

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  52. Generation of a triplet diradical from a donor–acceptor cross conjugate upon acid-induced electron transfer Reviewed

    Mats O. Sandberg, Osami Nagao, Zhikun Wu, Michio M. Matsushita and Tadashi Sugawara

    Chemical Communications     page: 3738-3740   2008

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  53. Cotunneling Current Affected by Spin-Polarized Wire Molecules in Networked Gold Nanoparticles Reviewed

    T. Sugawara, M. Minamoto, M. M. Matsushita, P. Nickels, S. Komiyama

    Physical Review B   Vol. 77   page: 235316   2008

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  54. *Molecule-based system with coexisting conductivity and magnetism and without magnetic inorganic ions Reviewed

    M. M. Matsushita, H. Kawakami, T. Sugawara, M. Ogata

    Physical Review B   Vol. 77   page: 195208   2008

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  55. *Negative Magneto-resistance Observed on an Ion-radical salt of a TTF-based Spin-polarized Donor Reviewed

    Michio M. Matsushita, Hironori Kawakami, Yuzo Kawada, and Tadashi Sugawara

    Chemistry Letters   Vol. 36   page: 110-111   2007

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  56. *Current-Induced Low-Resistance State and Its Crystal Structure of a TTF-Based Dimeric Donor Salt Reviewed

    Michio M. Matsushita and Tadashi Sugawara

    Journal of The American Chemical Society   Vol. 127   page: 12450-12451   2005

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  57. *Formation of self-assembled monolayer of phenylthiol carrying nitronyl nitroxide on gold surface Reviewed

    Michio M. Matsushita, Naoto Ozaki, Tadashi Sugawara, Fumio Nakamura, and Masahiko Hara

    Chemistry Letters     page: 596-597   2002

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  58. *Hydrogen-Bonded Organic Ferromagnet Reviewed

    Michio M. Matsushita, Akira Izuoka, Tadashi Sugawara, Tatsuya Kobayashi, Nobuo Wada, Naoya Takeda, and Masayasu Ishikawa

    Journal of The American Chemical Society   Vol. 119   page: 4369-4379   1997

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Books 1

  1. 化学便覧 基礎編 改訂第6版

    松下未知雄、阿波賀邦夫( Role: Contributor ,  第14章 電気・磁気・光学的性質 14.4 磁性)

    日本化学会 編, 丸善出版  2021.1  ( ISBN:978-4-621-30521-8

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    Total pages:1534   Language:Japanese

Presentations 1

  1. 有機ラジカルをスピン源とするスピントロニクス材料の開発 Invited

    松下未知雄

    新潟大学コアステーション 「ユビキタスグリーンケミカル エネルギー連携教育研究センター」第11 回研究シンポジウム  2021.3.15  新潟大学ユビキタスグリーンケミカルエネルギー連携教育研究センター

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    Event date: 2021.3

    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

    Venue:新潟大学(オンライン)   Country:Japan  

Research Project for Joint Research, Competitive Funding, etc. 1

  1. 分子スピンに基づく有機薄膜磁気抵抗素子の開発

    2009.4

KAKENHI (Grants-in-Aid for Scientific Research) 7

  1. トポロジカル励起スピン制御によるπラジカル材料のエレクトロニクス素子への展開

    Grant number:20H02715  2020.4 - 2023.3

    科学研究費助成事業  基盤研究(B)

    手木 芳男, 藤原 正澄, 松下 未知雄, 鐘本 勝一, 仕幸 英治, 吉田 考平

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    Authorship:Coinvestigator(s) 

    広いπ電子系を有する有機半導体材料は、光に対して脆弱であるという課題が存在する。本研究では、申請代表者らがこれまでに蓄積したπラジカルの励起状態の知見をもとに、分子内のπ電子軌道のつながり方を利用して励起状態のダイナミクスをスピン状態で制御することにより上記の課題を克服し、高い光耐久性と機能性を有する革新的π電子材料を創生する。先端的スピン計測により励起状態ダイナミクスとキャリアダイナミクスの解明も行い、励起状態スピン制御に関する学術的知見をえる。更に、それらのπラジカル材料を有機エレクトロニクス素子へ展開する目的で電界効果トランジスタ素子を作成し、半導体材料としての基本特性を明らかにする。
    ペンタセンは、結晶状態での高いホール伝導度と薄膜化の容易さのため有機半導体素子への応用が期待されているが、可視光による劣化と有機溶剤に対する難溶性が素子作製や実用化の大きな障害となっていた。代表者らは、ペンタセン類にπラジカルをπ共役で付加することによりペンタセン類の光耐久性と溶解度が著しく向上することを報告してきた。本研究課題は上記のこれまでの知見に立脚し、(1)トポロジカル励起スピン制御による高い光耐久性と機能性を有するπラジカルの創生、(2)新規πラジカル材料を用いた有機エレクトロニクス素子への展開の2課題を密接に関連させながら並行して研究を遂行した。
    πトポロジーを利用した励起状態制御に立脚してTIPS(triisopropylsilylethynyl)基と安定ラジカル置換基をそれぞれ1つずつ持つ2種のペンタセン-ラジカル連結系を合成し、電子スペクトル、電子スピン共鳴(ESR)、等により同定し、その光耐久性を調べた。さらに、それらの参照試料となるTIPS-ペンタセンの薄膜試料を独自設計の櫛型電極上に真空蒸着により作成し、その励起状態ダイナミクスと光電流生成機構を、光電流と電気的検出磁気共鳴(EDMR)信号の温度変化測定により明らかにした。また、ペンタセン-ラジカル連結系の電界効果トランジスタ(FET)性能の評価に向けて、特注櫛型電極を試作し、それを用いてTIPS-ペンタセンの薄膜試料のFET性能の評価を行い、文献との比較により当研究室でのFET性能評価の基盤を構築した。また、このFET素子と自作の回路を組み合わせることにより、ゲート電極に電界印加条件下でのTIPS-ペンタセンの薄膜試料の光電流のEDMR測定にも成功した。これらにより(2)の課題の実現に向けた基礎的知見を得た。
    申請計画通りπトポロジーの異なる2種のペンタセン-安定ラジカル連結系を合成し、その光耐久性を評価した。t-Butyl-nitroxide radical系も当初計画していたが、最終生成物のラジカルが化学的に不安定なため単離には成功しなかった。そこで、ラジカルの種類を変更したが、それ以外は計画通りに進行している。また、次年度以降の測定に向けてTIPS-ペンタセンを標準試料に用いて、特集櫛型電極を使用した電界効果トランジスタ性能評価システムも構築でき、さらに、ゲート電極印加条件下での光電流モニターによる電気的検出ESRの検出にも成功した。課題(1)に関しては、ラジカル種の変更等一部計画通りには進まなかった部分もあるが、次年度以降の課題(2)に向けた準備が着実に進んでおり、研究は申請計画に沿って概ね順調に進行している。
    概ね順調に研究は進行しているので、ほぼ申請計画通り研究を推進する。ラジカル系の合成経路はほぼ確立したので、次年度以降はラジカル系の大量合成を行い物性測定の方に重点を移して研究を遂行する。次年度は、特にペンタセン-ラジカル連結系の材料を用いて電界効果トランジスタ(FET)素子を試作し、FET性能の評価を実施する。また、電界印加ESR測定や光電流測定、電気的検出ESRによるキャリアダイナミクスの解明も手掛ける。

  2. 有機ラジカルのスピンに基づく単一分子スピントロニクス

    2016.4 - 2018.3

    科学研究費補助金  新学術領域研究「分子アーキテクトニクス」

    松下未知雄

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    Authorship:Principal investigator 

    近年代表者らが世界で初めて実現した、スピン源と伝導電子の両方が有機分子の π 共役系に起因する有機磁性-導電性共存系を分子接合系へと拡張し、単分子スピントロニクスの実現を目指す。

  3. 有機ラジカルのスピンに基づく単分子スピントロニクス素子の開発

    Grant number:16H00962  2016.4 - 2018.3

    新学術領域研究(研究領域提案型)

    松下 未知雄

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    Authorship:Principal investigator 

    Grant amount:\5720000 ( Direct Cost: \4400000 、 Indirect Cost:\1320000 )

    分子コンピューターのモデルとして利用可能な分子系について、さらなる検討を行った。
    (1)これまでの研究で、最も有名な分子性導体のひとつであるTTF-TCNQが、パイエルス転移温度以下の絶縁相において負性抵抗を示すことを見出している。この負性抵抗の温度依存性をさらに詳細に検討したところ、TTF-TCNQに見られる3つの相転移が、温度だけでなく、印加する電流密度によっても現れることを見出した。さらに、これら3つの相転移点が、温度・電流密度が異なる場合でも同じ電導度で現れることが明らかとなった。この系における、負性抵抗を含む非線形導電現象と相転移が、電流印加により誘起されたキャリヤー密度に依存する現象であることが明らかとなった。
    (2)高い対称性をもつシクロファン型のドナー分子のイオンラジカル結晶において、低温で正方晶系から単斜晶系へ対称性が低下する構造相転移を示すことを利用して、格子変形の方向を印加電流によって制御することを試み、実際に直交する軸方向で一方に大電流を印加すると電流を印加した軸の抵抗が減少し、もう一方の軸の抵抗が上昇する現象を見出している。この系では格子変形の方向が異なる小さなドメインがモザイク状に分布していると考えられ、大電流の印加により一時的に転移温度を超えることで、徐々に電流印加方向に抵抗が低い構造に変化するものと考えられる。しかしながら、これまでの実験では2つの軸方向に交互に電流を印加して測定を行っていたため、電流印加中の変化の様子は必ずしも明確でなかった。本年度、交流電導度測定法を組み合わせることにより、一方の軸に直流の大電流を印加しながらもう一方の軸の電導度の変化を同時に測定したところ、大電流の印加によって実際に構造相転移が生じていることを示す抵抗変化が観察された。分子集積回路のモデルの一つとして興味深い系である。
    29年度が最終年度であるため、記入しない。
    29年度が最終年度であるため、記入しない。

  4. 有機ラジカルのスピンに基づく単一分子スピントロニクス

    2014.4 - 2016.3

    科学研究費補助金  新学術領域研究「分子アーキテクトニクス」

    松下未知雄

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    Authorship:Principal investigator 

    近年代表者らが世界で初めて実現した、スピン源と伝導電子の両方が有機分子の π 共役系に起因する有機磁性-導電性共存系を分子接合系へと拡張し、単分子スピントロニクスの実現を目指す。

  5. Organic Magnetoresistive Thin Film

    2009.4 - 2012.3

    Grant-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists(A)

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    Authorship:Principal investigator 

  6. 有機局在スピン-伝導電子共存系におけるスピン流の解明

    2008.4 - 2011.3

    科学研究費補助金  特定領域研究

    松下 未知雄

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    Authorship:Principal investigator 

  7. 学習する分子ワイヤーネットワーク

    2007.4 - 2009.3

    科学研究費補助金  萌芽研究,課題番号:19655066

    松下 未知雄

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    Authorship:Principal investigator 

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Teaching Experience (On-campus) 2

  1. First Year Seminar A

    2015

  2. 物性化学II

    2014

Teaching Experience (Off-campus) 1

  1. 有機ラジカルの材料化学

    2021.11 Kyoto University)

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    Level:Postgraduate