Probing the Location of Hot Spots by Surface-Enhanced Raman Spectroscopy: Toward Uniform Substrates

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	Probing the Location of Hot Spots by Surface-Enhanced Raman Spectroscopy: Toward Uniform Substrates
	Wang, Xiang ; Li, Maohua ; Meng, Lingyan ; Lin, Kaiqiang ; Feng, Jiamin ; Huang, Tengxiang ; Yang, Zhilin ; Ren, Bin ; Feng JM(冯加民) ; Yang ZL(杨志林) ; Ren B(任斌)
刊名	http://dx.doi.org/10.1021/nn405073h
	2014
关键词	SCATTERING NANOPARTICLE PLASMONICS MOLECULES AU
英文摘要	MOST [2011YQ03012406, 2013CB933703, 2009CB930703]; NSFC [21021120456, 21321062, 21227004, J1310024, 20825313]; Wide applications of surface plasmon resonance rely on the in-depth understanding of the near-field distribution over a metallic nanostructure. However, precisely locating the strongest electric field in a metallic nanostructure still remains a great challenge in experiments because the field strength decays exponentially from the surface. Here, we demonstrate that the hot spot position for gold nanoparticles over a metal film can be precisely located using surface-enhanced Raman spectroscopy (SERS) by rationally choosing the probe molecules and excitation wavelengths. The finite difference time domain simulation verifies the experimental results and further reveals that the enhancement for the above system is sensitive to the distance between nanoparticles and the metal film but insensitive to the distance of nanoparticles. On the basis of this finding, we propose and demonstrate an approach of using a nanoparticles-on-metal film substrate as a uniform SERS substrate. This work provides a convenient way to probe the location of strong near-field enhancement with SERS and will have important implications in both surface analysis and surface plasmonics.
语种	英语
出版者	AMER CHEMICAL SOC
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/89482]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Wang, Xiang,Li, Maohua,Meng, Lingyan,et al. Probing the Location of Hot Spots by Surface-Enhanced Raman Spectroscopy: Toward Uniform Substrates[J]. http://dx.doi.org/10.1021/nn405073h,2014.
APA	Wang, Xiang.,Li, Maohua.,Meng, Lingyan.,Lin, Kaiqiang.,Feng, Jiamin.,...&任斌.(2014).Probing the Location of Hot Spots by Surface-Enhanced Raman Spectroscopy: Toward Uniform Substrates.http://dx.doi.org/10.1021/nn405073h.
MLA	Wang, Xiang,et al."Probing the Location of Hot Spots by Surface-Enhanced Raman Spectroscopy: Toward Uniform Substrates".http://dx.doi.org/10.1021/nn405073h (2014).