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	Near-field coupling and SERS effects of palladium nanoparticle dimers
	Ruan, FangXiong ; Zhang, ShunPing（Chinese Acad Sci, Inst Phys） ; Li, ZhiPeng（Chinese Acad Sci, Inst Phys） ; Yang, ZhiLin ; Wu, DeYin ; Wu DY(吴德印) ; Ren, Bin ; Ren B(任斌) ; Xu, HongXing（Chinese Acad Sci, Inst Phys）
	2010
关键词	surface-enhanced Raman scattering near-field coupling Mie scattering transition metals palladium
英文摘要	The linear optical properties and the surface-enhanced Raman scattering (SERS) effect of spherical palladium nanoparticle dimers are analyzed theoretically using generalized Mie theory. The calculation results demonstrate that the near-field coupling effect greatly influences the absorption, scattering and extinction spectra of nanoparticle dimers. The surface plasmon resonance wavelength red-shifts dramatically as the separation between nanoparticles decreases. Because of the near-field coupling between nanoparticles and the size effect, the maximum SERS enhancement factor at the' hot spot' between palladium nanoparticle dimers is as high as 10(7)-10(8), while the averaged SERS enhancement factor over the entire nanoparticle surface is in the range of 10(5)-10(6). The deviation between the position of the peak in the extinction spectrum and the wavelength for maximum surface-averaged enhancement for the Pd nanoparticle dimers indicates that localized surface plasmon resonance has different influences on the far and near fields. These theoretical results may help to reveal the relationship between the far and near fields, as well as understand the mechanism of electromagnetic enhancement in the surface-enhanced scattering of transition metals.; National Natural Science Foundation of China [20703032]; National Basic Research Program of China [2009CB930703]; Natural Science Foundation of Fujian Province of China [E0710028]
语种	英语
出版者	SCIENCE CHINA PRESS
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:10.1007/s11434-010-4048-9]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Ruan, FangXiong,Zhang, ShunPing,Li, ZhiPeng,et al. Near-field coupling and SERS effects of palladium nanoparticle dimers[J],2010.
APA	Ruan, FangXiong.,Zhang, ShunPing.,Li, ZhiPeng.,Yang, ZhiLin.,Wu, DeYin.,...&Xu, HongXing.(2010).Near-field coupling and SERS effects of palladium nanoparticle dimers..
MLA	Ruan, FangXiong,et al."Near-field coupling and SERS effects of palladium nanoparticle dimers".(2010).

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