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Issue 3, 2012
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High-density metallic nanogaps fabricated on solid substrates used for surface enhanced Raman scattering

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Abstract

The Raman signal of adsorbed molecules can be significantly enhanced by utilizing metallic structures with high-density Raman hot spots used as surface enhanced Raman scattering (SERS) substrates. In this work, we develop a simple, convenient and tunable method to fabricate high-density Ag or Au nanogaps on Si wafers. These nanogaps can serve as Raman hot spots, leading to dramatic enhancement of the Raman signal. The high-density nanogaps can be formed by repeating the electroless deposition of Ag NPs (or Au NPs) and coating of p-aminothiophenol (PATP, a Raman probe) on the deposited Ag NPs (or Au NPs) through the self-assembly process. After removal of PATP by O2 plasma, the as-fabricated SERS substrate can be reused for the detection of other molecules.

Graphical abstract: High-density metallic nanogaps fabricated on solid substrates used for surface enhanced Raman scattering

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Supplementary files

Article information


Submitted
02 Aug 2011
Accepted
14 Nov 2011
First published
09 Dec 2011

Nanoscale, 2012,4, 860-863
Article type
Paper

High-density metallic nanogaps fabricated on solid substrates used for surface enhanced Raman scattering

G. Lu, H. Li, S. Wu, P. Chen and H. Zhang, Nanoscale, 2012, 4, 860 DOI: 10.1039/C1NR10997A

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