期刊
ACS NANO
卷 8, 期 5, 页码 4440-4449出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn406434y
关键词
plasmon-enhanced fluorescence; gold nanorods; single-molecule fluorescence; surface plasmon resonance
类别
资金
- ERC Advanced Grant SiMoSoMa
- Netherlands Organization for Scientific Research (ECHO)
- Netherlands Organization for Scientific Research (Veni Fellowship)
- Fundacao para a Ciencia e a Tecnologia (Ciencia)
- Fundacao para a Ciencia e a Tecnologia [PTDC/CTM-NAN/2700/2012]
- Fundação para a Ciência e a Tecnologia [PTDC/CTM-NAN/2700/2012] Funding Source: FCT
Enhancing the fluorescence of a weak emitter is important to further extend the reach of single-molecule fluorescence imaging to many unexplored systems. Here we study fluorescence enhancement by isolated gold nanorods and explore the role of the surface plasmon resonance (SPR) on the observed enhancements. Gold nanorods can be cheaply synthesized in large volumes, yet we find similar fluorescence enhancements as literature reports on lithographically fabricated nanoparticle assemblies. The fluorescence of a weak emitter, crystal violet, can be enhanced more than 1000-fold by a single nanorod with its SPR at 629 nm excited at 633 nm. This strong enhancement results from both an excitation rate enhancement of similar to 130 and an effective emission enhancement of similar to 9. The fluorescence enhancement, however, decreases sharply when the SPR wavelength moves away from the excitation laser wavelength or when the SPR has only a partial overlap with the emission spectrum of the fluorophore. The reported measurements of fluorescence enhancement by 11 nanorods with varying SPR wavelengths are consistent with numerical simulations.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据