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Fabrication of SERS Active Substrates by Nanoimprint Lithography

Published online by Cambridge University Press:  01 February 2011

Kebin Li ,
Bo Cui ,
Liviu Clime  and
Teodor Veres
Kebin Li
Affiliation:
kebin.Li@cnrc-nrc.gc.ca, Industrial Materials Institute, Functional NanoMaterials, 75, de Mortagne, Boucherville, Québec, Canada, J4B 6Y4, Boucherville, J4B 6Y4, Canada
Bo Cui
Affiliation:
Bo.cui@cnrc-nrc.gc.ca, National Research Council, Canada, Industrial Materials Institute, 75, de Mortagne, Boucherville, J4B 6Y4, Canada
Liviu Clime
Affiliation:
liviu.clime@cnrc-nrc.gc.ca, National Research Council, Canada, Industrial Materials Institute, 75, de Mortagne, Boucherville, J4B 6Y4, Canada
Teodor Veres
Affiliation:
Teodor.veres@cnrc-nrc.gc.ca, National Research Council, Canada, Industrial Materials Institute, 75, de Mortagne, Boucherville, J4B 6Y4, Canada
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Abstract

A method for low-cost fabrication of SERS substrates in rapid and reproducible way based on nanoimprint lithography (NIL) method has been developed. The SERS enhancement for detection of Rhodamine 6G molecules is demonstrated on two model nanostructures comprising either Au nano-crescents or Ag nano-wells fabricated by this method. Numerical simulations based on discrete dipole approximation (DDA) method show that the observed enhancement of the SERS signal for the given geometries originates in hot-spots localized at the tips of the nanocrescent. For the nanowell, the hotspots are mainly localized inside the cavity, on the side of the nanodonut, or at the edge of the bottom nanodisc when it is excited by a laser at the wavelength of 785 nm.

Keywords

nanostructureRaman spectroscopyoptical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1054: Symposium FF – Synthesis and Surface Engineering of Three-Dimensional Nanostructures , 2007 , 1054-FF01-03
Copyright
Copyright © Materials Research Society 2008

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References

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