Ag@SiO2 Core-Shell Nanoparticles for Probing Spatial Distribution of Electromagnetic Field Enhancement via Surface-Enhanced Raman Scattering

CORC > 物理研究所 > 物理所公开发表论文 > 期刊论文

	Ag@SiO2 Core-Shell Nanoparticles for Probing Spatial Distribution of Electromagnetic Field Enhancement via Surface-Enhanced Raman Scattering
	Wang, W ; Li, ZP ; Gu, BH ; Zhang, ZY ; Xu, HX
刊名	ACS NANO
	2009
卷号	3 期号:11 页码:3493
关键词	SINGLE-MOLECULE RHODAMINE 6G SILICA NANOPARTICLES DISTANCE DEPENDENCE SPECTROSCOPY SERS ADSORPTION MONOLAYERS MECHANISM FILMS
ISSN号	1936-0851
通讯作者	Gu, BH: Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
中文摘要	We show that the spatial distribution of the electromagnetic (EM) field enhancement can be probed directly via dynamic evolution of surface-enhanced Raman scattering (SERS) of rhodamine 6G (R6G) molecules as they diffuse into Ag@SiO2 core-shell nanoparticles. The porous silica shell limits the diffusion of R6G molecules toward Inner Ag cores, thereby allowing direct observation and quantification of the spatial distribution of SERS enhancement as molecules migrate from the low to high EM fields inside the dielectric silica shell. Our experimental evidence is validated by the generalized Mie theory, and the approach can potentially offer a novel platform for further investigating the site and spatial distribution of the EM fields and the EM versus chemical enhancement of SERS due to molecular confinement within the Ag@SiO2 nanoshell.
收录类别	SCI
资助信息	National Natural Science Foundation of China [1062S418]; MOST [2006DFB02020, 2007CB936800]; UT-Battelle LLC for US DOE [DE-AC05-000R22725]
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/33514]
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	Wang, W,Li, ZP,Gu, BH,et al. Ag@SiO2 Core-Shell Nanoparticles for Probing Spatial Distribution of Electromagnetic Field Enhancement via Surface-Enhanced Raman Scattering[J]. ACS NANO,2009,3(11):3493.
APA	Wang, W,Li, ZP,Gu, BH,Zhang, ZY,&Xu, HX.(2009).Ag@SiO2 Core-Shell Nanoparticles for Probing Spatial Distribution of Electromagnetic Field Enhancement via Surface-Enhanced Raman Scattering.ACS NANO,3(11),3493.
MLA	Wang, W,et al."Ag@SiO2 Core-Shell Nanoparticles for Probing Spatial Distribution of Electromagnetic Field Enhancement via Surface-Enhanced Raman Scattering".ACS NANO 3.11(2009):3493.