Non-resonance: SERS effects of silver colloids with different shapes

被引：175

作者：

Tiwari, Vidhu S.

Oleg, Tovmachenko

Darbha, Gopala Krishna

Hardy, William

Singh, J. P.

Ray, Paresh Chandra

机构：

[1] Jackson State Univ, Dept Chem, Jackson, MS 39217 USA

[2] Mississippi State Univ, Inst Clean Energy Technol, Starkville, MS 39759 USA

来源：

CHEMICAL PHYSICS LETTERS | 2007年 / 446卷 / 1-3期

关键词：

D O I：

10.1016/j.cplett.2007.07.106

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：

Shape-controlled synthesis of metal nanostructures has opened many new possibilities to design ideal building blocks for future nanodevices. By solution-based method, three kinds of silver colloids, nanospheres, triangular nanoprisms and nanorods have been synthesized. Non-resonant surface-enhanced Raman scattering (SERS) spectra of Rhodamine 6G on as-prepared silver nanostructures of various shapes were measured and their shape-dependent properties were evaluated. The intensity of the SERS signal was the smallest for the silver nanorod and nanoprism exhibits the strongest SERS signals. The great differences of the SERS spectra for different shape Ag colloids confirmed that like electromagnetic enhancement, chemical enhancement also plays a very important role on SERS signal enhancement. (C) 2007 Elsevier B.V. All rights reserved.

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页码：77 / 82

页数：6

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