Nano Archive

Surface-enhanced Raman spectroscopy and nanogeometry: The plasmonic origin of SERS

Lee, Seung Joon and Guan, Zhiqiang and Xu, Hongxing and Moskovits, Martin (2007) Surface-enhanced Raman spectroscopy and nanogeometry: The plasmonic origin of SERS. JOURNAL OF PHYSICAL CHEMISTRY C, 111 (49). pp. 17985-17988.

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Official URL: http://dx.doi.org/10.1021/jp077422g

Abstract

Using a series of highly regular nanostructures consisting of periodic Ag nanowires fabricated in porous aluminum oxide, we validate the overwhelmingly plasmonic origin of the most intense SERS signals such as those responsible for single-molecule SERS, demonstrating its sensitive dependence on the system's nanogeometry. By varying the interwire gap distance from 35 to 10 nm, the SERS intensity excited with 785 nm laser light, increased over 200-fold. These observations were shown to agree quantitatively with electromagnetic field calculations carried out using the free space green's tensor method.

Item Type:Article
Subjects:Analytical Science > Nanotechnology for sensing and actuating
Analytical Science > Beam methods
ID Code:2675
Deposited By:Anuj Seth
Deposited On:09 Jan 2009 09:44
Last Modified:09 Jan 2009 17:31

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