Electromagnetic Modelling of Raman Enhancement from Nanoscale Structures as a Means to Predict the Efficacy of SERS Substrates

Brown, Richard J. C.; Wang, Jian; Milton, Martin J. T.

doi:https://doi.org/10.1155/2007/12086

Journal of Nanomaterials

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Modeling and Characterization of the Interaction of Electromagnetic Wave with Nanocomposites and Nanostructured Materials

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Volume 2007 | Article ID 012086 | https://doi.org/10.1155/2007/12086

Electromagnetic Modelling of Raman Enhancement from Nanoscale Structures as a Means to Predict the Efficacy of SERS Substrates

Richard J. C. Brown,¹Jian Wang,¹and Martin J. T. Milton¹

Academic Editor: Christian Brosseau

Received19 Mar 2007

Accepted31 Jul 2007

Published19 Sept 2007

Abstract

The requirement to optimise the balance between signal enhancement and reproducibility in surface enhanced Raman spectroscopy (SERS) is stimulating the development of novel substrates for enhancing Raman signals. This paper describes the application of finite element electromagnetic modelling to predict the Raman enhancement produced from a variety of SERS substrates with differently sized, spaced and shaped morphologies with nanometre dimensions. For the first time, a theoretical comparison between four major generic types of SERS substrate (including metal nanoparticles, structured surfaces, and sharp tips) has been performed and the results are presented and discussed. The results of the modelling are consistent with published experimental data from similar substrates.

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Copyright

Copyright © 2007 Richard J. C. Brown et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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