2004 Fiscal Year Final Research Report Summary
Polarization study of molecules at surfaces by scanning probe method
| Project/Area Number |
14205009
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
表面界面物性
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| Research Institution | Kyoto University |
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Principal Investigator |
YAMADA Hirofumi Kyoto University, Graduate School of Engineering, Associate Professor, 工学研究科, 助教授 (40283626)
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| Co-Investigator(Kenkyū-buntansha) |
HORIUCHI Toshihisa Kyoto University, Graduate School of Engineering, Assistant Professor, 工学研究科, 助手 (10238785)
ISHIDA Kenji Kyoto University, Graduate School of Engineering, Lecturer, 工学研究科, 講師 (20303860)
KOBAYASHI Kei Kyoto University, International Innovation Center, Assistant Professor, 国際融合創造センター, 助手 (40335211)
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| Project Period (FY) |
2002 – 2004
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| Keywords | dynamic force microscopy / DFM / NC-AFM / Kelvin-probe force microscopy / KFM / molecular-resolution imaging / molecular polarization / frequency modulation detection method |
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| Research Abstract |
There has been a great progress in dynamic force microscopy(DFM) and the related techniques. Atomic force microscopy(AFM) has been proved to be a powerful tool for nondestructive, atomic-resolution imaging of various materials including organic molecules, which are often difficult to be investigated by scanning tunneling microscopy(STM). Some of AFM-based techniques such as Kelvin-probe force microscopy(KFM) are capable of investigating nanometer-scale electrical properties. In addition, AFM probe can basically enables us to directly access an object and to modify the structures and/or the properties. On the other hand, since electrical polarization or local electric field at the interface between molecules and a substrate are strongly related to electrical junction properties or ferroelectric domain formation, it is actually indispensable for understanding the physical origins of the interfacial polarization in the engineering aspect, especially in the application of the polarization control of molecules to the molecular electronics.
In this project we demonstrated that evaluation and control of molecular polarization was performed by newly developed techniques, which were (1)high-resolution atomic force microscopy, (2)molecule deposition with precisely controlled molecular orientation and (3)nanoscale DFM-based measurement techniques for electrical properties of molecules.
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