2015 Fiscal Year Final Research Report
Surface-enhanced Raman and hyper-Raman scattering measurement by optically trapping silver nanoparticles
| Project/Area Number |
25410029
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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 |
Physical chemistry
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| Research Institution | Kwansei Gakuin University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
OZAKI Yukihiro 関西学院大学, 理工学部, 教授 (00147290)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 光ピンセット / 表面増強ハイパーラマン散乱 / 表面増強ラマン散乱 / 赤外吸収分光 |
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| Outline of Final Research Achievements |
Recently, nano-sized materials can be manipulated by focusing a near-infrared (NIR) laser beam, namely, an optical trapping. By focusing an NIR laser beam on an Ag nanoparticle, also surface-enhanced hyper-Raman scattering (SEHRS) has been observed. In this study, SEHRS spectra at a desired position on yeast were measured by using optically-trapped silver nanoparticles (AgNPs).
From conventional cooking yeast in the suspension at pH = 9, the SEHRS peak at 1380 cm-1, which is originates from PMBA in alkaline condition, hardly appeared. From the yeast for biology, on the other hand, the SEHRS peak sometimes was observed at 1380 cm-1. This shows different efficiency in the fermentation. Interestingly, the SEHRS peaks which are not assigned to PMBA were occasionally observed. At different positions on a single yeast, intensities of the SEHRS peak at 1380 cm-1 were varied. This result represents the pH distribution on yeast.
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| Free Research Field |
分子分光
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