Development of active molecular device on silicon surface
| Project/Area Number |
17K05055
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Thin film/Surface and interfacial physical properties
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| Research Institution | Shizuoka University |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 走査トンネル顕微鏡 / 表面化学 / 共吸着 / シリコン / 分子吸着 / ナノギャップ / 高濃度ドーピング / 単分子デバイス / 表面吸着 / 表面再構成 / リン / 表面科学 / 単分子制御 |
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| Outline of Final Research Achievements |
In order to study the "device with molecular migration" that does not fix a molecule to the electrode, we used the Si(111)-7×7 structure as a template. We studied effect of high-concentration phosphorus doping to the surface structure and co-adsorption of atoms and molecules. It was found that when the sample was treated with the high-concentration phosphorus doping, and was heated in an ultrahigh vacuum, a clean surface structure in which some phosphorus atoms were embedded and a region covered with continuous phosphorus layer were observed. We tried to fabricate a highly-doped sample with a patterned electrode structure, and found that the oxidation rate was extremely high. Molecular migration process by theoretical calculation and metal-molecule co-adsorption experiments on graphene samples are underway.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究によって得られた、高濃度リンドープ基板をアニールした際に得られるリン終端表面は、グラフェンのように２次元層構造であり、表面から伸びたダングリングボンドは共有電子対で充満されている。つまり反応不活性構造であることが予想され、酸素を含む反応性ガス吸着の制御ができる可能性がある。また、ピロールと共吸着させた場合の方が、電子供与生の原子・分子の吸着エネルギーが下がることが分かり、分子の移動を伴う素子における分子移動のメカニズムの理解が深まった。
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Report
(4 results)
Research Products
(3 results)
