Engineering of SERS Substrates Based on Noble Metal Nanomaterials for Chemical and Biomedical Applications

Surface-enhanced Raman scattering (SERS) has attracted great interest due to its remarkable enhancement, excellent sensitivity, and the "fingerprinting" ability to produce distinct spectra for detecting various molecules. Noble metal nanomaterials have usually been employed as SERS-active...

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Bibliographic Details
Published in:Applied spectroscopy reviews 2015-07, Vol.50 (6), p.499-525
Main Authors: Cao, Yanqin, Zhang, Junwei, Yang, Yong, Huang, Zhengren, Long, Nguyen Viet, Fu, Chaoli
Format: Article
Language:English
Subjects:
biosensing
chemical detection
Metals
Molecules
Nanomaterials
noble metal
Scattering
SERS
Spectrum analysis
Substrates
surface plasmon resonance
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Summary:Surface-enhanced Raman scattering (SERS) has attracted great interest due to its remarkable enhancement, excellent sensitivity, and the "fingerprinting" ability to produce distinct spectra for detecting various molecules. Noble metal nanomaterials have usually been employed as SERS-active substrates because of their strong SERS enhancement originated from their unique surface plasmon resonance (SPR) properties. Because the SPR property depends on metal material's size, shape, morphology, arrangement, and dielectric environment around metal nanostructures, the key to wider applications of SERS technique is to develop plasmon-resonant structures with novel geometries to enhance Raman signals and to control the periodic ordering of these structures over a large area to obtain reproducible Raman enhancement. This review presents a general view on the theory background of SERS effect and several basic concepts and focuses on recent progress in engineering metallic nanostructures with various morphologies using versatile methods for improving SERS properties. Their potential applications in the field of chemical detection and biological sensing are overviewed.
ISSN:0570-4928
1520-569X
DOI:10.1080/05704928.2014.923901