Comparison of the surface-enhanced Raman scattering on sharp and truncated silver nanocubes

被引：185
作者：
McLellan, Joseph M. [1 ]
Siekkinen, Andrew [1 ]
Chen, Jingyi [1 ]
Xia, Younan [1 ]
机构：
[1] Univ Washington, Dept Chem, Seattle, WA 98195 USA
来源：
CHEMICAL PHYSICS LETTERS | 2006年 / 427卷 / 1-3期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/j.cplett.2006.05.111
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Sharp and truncated Ag nanocubes ranging from 60 to 100 nn in size were synthesized, and the surface-enhanced Raman scattering (SERS) activities of these nanoparticles were compared with respect to both size and shape (i.e. sharp vs. truncated) using 514 or 785 nm lasers. Two trends were observed: (i) larger particles (90 and 100 nm) were found to have higher SERS efficiencies, and (ii) particles with shaper corners gave more intense SERS signals than their truncated counterparts. The difference in enhancement factor was mainly attributed to the variation in overlap between the laser source and surface plasmon resonance (SPR) bands as a function of size and degree of truncation. (c) 2006 Elsevier B.V. All rights reserved.
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页码：122 / 126
页数：5
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