2013 Fiscal Year Final Research Report
Extremely high fluorescence enhancement in quenching-free nanostructures
| Project/Area Number |
23310064
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nanostructural science
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| Research Institution | Kobe University |
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Principal Investigator |
HAYASHI Shinji 神戸大学, 工学(系)研究科(研究院), 名誉教授 (50107348)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | ナノ構造 / 微粒子 / 蛍光増強 / 有機分子 / 近接場 / 光散乱 |
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| Research Abstract |
We could achieve the quenching-free fluorescence based on nonmetallic particles. Calculations based on the Mie theory suggested high enhancement factors for GaP and Si particles. Experiments performed with GaP particles and dye molecules indeed demonstrated the fluorescence enhancement with an enhancement factor as high as 140. A high enhancement was observed even when the molecules are located within 10 nm away from the particle surfaces, demonstrating that the fluorescence is quenching free. We also theoretically examined the high electric field enhancement in planar dielectric multilayer systems. The dielectric waveguide is expected to be very much suited to the quenching free fluorescence enhancement.
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