Near-field coupling and SERS effects of palladium nanoparticle dimers

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	Near-field coupling and SERS effects of palladium nanoparticle dimers
	Ruan, FX ; Zhang, SP ; Li, ZP ; Yang, ZL ; Wu, DY ; Ren, B ; Xu, HX
刊名	CHINESE SCIENCE BULLETIN
	2010
卷号	55 期号:26 页码:2930
关键词	ENHANCED RAMAN-SPECTROSCOPY SINGLE-MOLECULE ELECTROCHEMICAL INTERFACES ARBITRARY SPHERES TRANSITION-METALS LIGHT-SCATTERING GOLD NANORODS ELECTRODES MECHANISM STRATEGY
ISSN号	1001-6538
通讯作者	Yang, ZL (reprint author), Xiamen Univ, Dept Phys, Xiamen 361005, Peoples R China.
中文摘要	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.
收录类别	SCI
资助信息	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
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/49767]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Ruan, FX,Zhang, SP,Li, ZP,et al. Near-field coupling and SERS effects of palladium nanoparticle dimers[J]. CHINESE SCIENCE BULLETIN,2010,55(26):2930.
APA	Ruan, FX.,Zhang, SP.,Li, ZP.,Yang, ZL.,Wu, DY.,...&Xu, HX.(2010).Near-field coupling and SERS effects of palladium nanoparticle dimers.CHINESE SCIENCE BULLETIN,55(26),2930.
MLA	Ruan, FX,et al."Near-field coupling and SERS effects of palladium nanoparticle dimers".CHINESE SCIENCE BULLETIN 55.26(2010):2930.