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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)860-863
Journal / PublicationNanoscale
Volume4
Issue number3
Online published9 Dec 2011
Publication statusPublished - 7 Feb 2012
Externally publishedYes

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. © 2012 The Royal Society of Chemistry.

Citation Format(s)

High-density metallic nanogaps fabricated on solid substrates used for surface enhanced Raman scattering. / Lu, Gang; Li, Hai; Wu, Shixin; Chen, Peng; Zhang, Hua.

In: Nanoscale, Vol. 4, No. 3, 07.02.2012, p. 860-863.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review