2014 Fiscal Year Final Research Report
Surface-enhanced Raman spectroscopy using single molecule bridged gold nanoparticle dimers
Project/Area Number |
24510138
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Nanostructural science
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Research Institution | Kobe University (2013-2014) Kyoto University (2012) |
Principal Investigator |
SUGANO Koji 神戸大学, 工学(系)研究科(研究院), 助教 (20372568)
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Keywords | 表面増強ラマン分光 / 化学分析 / ナノ粒子 / プラズモン共鳴 / セルフアセンブル |
Outline of Final Research Achievements |
A gold particle dimer shows huge electromagnetic enhancement when particle connection direction is matched to polarization direction of incident light. In this study the dimers were arrayed by the nanotrench-guided self-assembly for generating huge total Raman enhancement. The fabricated structures were characterized for Surface-Enhanced Raman Spectroscopy (SERS) depending on polarization angle to particle connection direction. The Raman intensity increased with decreasing the angle. Since electromagnetic interaction between dimers has large effect on Raman enhancement, the distance between dimers were optimized. The distance of 100 nm between dimers showed the highest Raman intensity. The optimized structure detected 4,4'-bipyridine molecules at the concentration of 10 pM. The detection for 100 nM solution was possible at the integration time of 0.2 s. This developed SERS substrate is expected to be applied to various trace analysis with high sensitivity and short detection time.
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Free Research Field |
ナノマイクロ加工
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