2013 Fiscal Year Final Research Report
Photochromism of diarylethene single molecules on metals and insulating films
| Project/Area Number |
23760041
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Thin film/Surface and interfacial physical properties
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| Research Institution | National Institute for Materials Science (2013)
The Institute of Physical and Chemical Research (2011-2012) |
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Principal Investigator |
SHIMIZU Tomoko 独立行政法人物質・材料研究機構, 極限計測ユニット, 主任研究員 (00462672)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 走査プローブ顕微鏡 / フォトクロミック分子 / 表面吸着 / 自己組織化 / ジアリールエテン |
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| Research Abstract |
Using scanning tunneling and non-contact atomic force microscopies, we have investigated adsorption structure, electronic states, thermal stability and photo-reactivity of diarylethene at the single molecular level. On Cu and Au substrates, thermal stability is lost and closed-form isomer becomes more stable than the open-form, which is opposite to solution and single crystalline phases. This is because of the charge transfer between the molecule and metal, resulting in the ionization of the molecule. We also found that the molecule reacted with NaCl insulating film, and formed self-organized superstructure by the interaction between Na ion and molecular dipole. Photo-reaction did not occur, which suggests the necessity of, for example, tip-enhanced effect. Finally we succeeded in high-resolution AFM to image internal structure of the molecule.
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[Journal Article]2012
Author(s)
T. K. Shimizu, J. Jung, T. Otani, Y.-K. Han, M. Kawai, and Y. Kim
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Journal Title
ACS Nano
Volume: Vol. 6
Pages: 2679-2685
DOI
Peer Reviewed
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