Development of sub-molecular spatial resolution spectroscopy using STM combined with light
| Project/Area Number |
22750004
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Physical chemistry
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| Research Institution | Tohoku University |
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Principal Investigator |
HORIMOTO Noriko 東北大学, 大学院・理学研究科, 助教 (40322672)
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2010: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 分子分光 / 走査型トンネル顕微鏡 / 走査プローブ顕微鏡 / プラズモン / 増強ラマン散乱 / 高空間分解能分光 |
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| Research Abstract |
In scanning tunneling spectroscope-tip enhanced Raman spectroscopy (STM-TERS), the shape and intensity of the spectra depends on various experimental parameters. We studied the spectral dependence on the position inside the rough gold substrate, the polarization direction of the incident laser light, STM bias voltage and tunneling current. As a result, in the condition where the number of molecules illuminated by the laser light is constant, large Raman signal was obtained at the concave part of the rough gold substrate when the polarization direction of the laser was perpendicular to the concave. This means that the field enhancement becomes large when the tip is in the vicinity of the concave part of the rough substrate. In addition, it was revealed that small bias voltages are appropriate for TERS measurements since luminescence originating from gold increases and Raman signal decreases at high bias voltages.
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Report
(3 results)
Research Products
(11 results)
