2015 Fiscal Year Final Research Report
Development of transient absorption microspectroscopic system for single nanoparticle
| Project/Area Number |
25410020
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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 | Ehime University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
ASAHI Tsuyoshi 愛媛大学, 大学院理工学研究科, 教授 (20243165)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 顕微過渡吸収分光 / 単一ナノ粒子分光 / 有機ナノ粒子 / 金ナノ粒子 / 複合ナノ粒子 / 励起状態ダイナミクス |
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| Outline of Final Research Achievements |
Single particle microspectroscopy with high time- and space-resolutions is necessary for the evaluation of nanomaterials, especially single organic nanoparticle having a size of a few tens of nm, which reactivity and optical properties depend on the size, shape and local environment. In this study, (1) the ultrafast transient microscpectroscopic system was developed in order to examine the excited-state relaxation of non-fluorescent nanomaterials. (2) We succeeded in the detection of transient signals of single metal or organic semiconductor nanoparticle. Especially, (3) we were able to detect the transient signal of single gold nanoparticle even with the diameter of 20 nm, and the back-scattering detection in our setup had the 20-times higher sensitivity than the transmitted-based detection in the conventional setup. (4) We examined the excited state dynamics of perylene single nanoparticle from nanoparticle to nanoparticle, and clarified its size-dependent excimer formation process.
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| Free Research Field |
レーザー光化学
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