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Author

A Subrahmanyam

Indian Institute of Technology Madras
Bio: A Subrahmanyam is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Analyte & Plastic optical fiber. The author has co-authored 1 publications.
Topics: Analyte, Plastic optical fiber, Sputter deposition
Papers
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Proceedings Article•DOI•
Comparison of SERS activity of sputtered, electroless-plated and nanoparticle-coated plastic fiber optic probes

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A Subrahmanyam1, C Christina Grace Charlet1, V V Raghavendra1•
Indian Institute of Technology Madras1
01 Dec 2015
TL;DR: In this paper, the surface enhanced Raman scattering (SERS) spectroscopy is used for trace molecule analysis and three different approaches, namely sputtering, electroless-plating and Au nanoflower (AuNF) chemisorption, are compared for their SERS activity using thiophenol as a model Raman analyte.
Abstract: Surface Enhanced Raman Scattering (SERS) spectroscopy is a promising tool for trace molecule analysis. Substrate development plays a crucial role in determining the SERS signal enhancement and the analyte detection limits. In this study, Plastic fiber optic (POF, 0.75 mm fiber diameter) U-bent probes coated with plasmonic gold obtained by three different approaches, namely sputtering, electroless-plating and Au nanoflower (AuNF) chemisorption are compared for their SERS activity using thiophenol as a model Raman analyte. The minimally sputtered probes produced detectable analyte peaks at low power but with lower enhancement. Substrates with increased sputter deposition times provided better enhancement. However, the AuNF-coated probes gave maximum SERS enhancement even at low power.