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Proceedings Paper

Sensing based on surface-enhanced Raman scattering using self-forming ZnO nanoarrays coated with gold as substrates
Author(s): Feng Tang; Pierre-Michel Adam; David J. Rogers; Vinod E. Sandana; Philippe Bove; Ferechteh H. Teherani
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Paper Abstract

Surface-Enhanced Raman spectroscopy (SERS) is a widely used technique adopted in both academia and industry for the detection of trace quantities of Raman active molecules. This is usually accomplished by functionalizing distributions of plasmonic metal nanoparticles with the analyte molecules. Recently metal-coated nanostructures have been investigated as alternatives to dispersions of metal nanoparticles in order to avoid clustering and homogeneity/reproducibility issues. In this paper, several samples of Au-coated ZnO nanoarrays are adopted as SERS substrates in order to investigate the molecular sensing capacity for methylene blue (MB) molecules. Self-forming ZnO nanoarrays were grown on both c-sapphire and silicon substrates by pulsed laser deposition. The nanoarrays were then coated with 30 nm of gold using thermal evaporation and the SERS signals of MB functionalized samples were obtained with a Raman microspectrometer. The ratio of SERS intensity to that of an MB functionalized glass substrate (ISERS/IRaman) was calculated based on the averaged SERS signals. A relatively good within-wafer homogeneity of the enhancement effect was found with ISERS/IRaman values as high as 64.2 for Au-coated nano ZnO grown on silicon substrates. The experimental results show that the Au-coated ZnO nanoarrays can be excellent SERS substrates for molecular/chemical analyte sensing.

Paper Details

Date Published: 27 March 2018
PDF: 7 pages
Proc. SPIE 10533, Oxide-based Materials and Devices IX, 105331F (27 March 2018); doi: 10.1117/12.2302741
Show Author Affiliations
Feng Tang, Lab. of Nanotechnology, Instrumentation and Optics, CNRS, Univ. of Technology of Troyes (France)
Pierre-Michel Adam, Lab. of Nanotechnology, Instrumentation and Optics, CNRS, Univ. of Technology of Troyes (France)
David J. Rogers, Nanovation (France)
Vinod E. Sandana, Nanovation (France)
Philippe Bove, Nanovation (France)
Ferechteh H. Teherani, Nanovation (France)

Published in SPIE Proceedings Vol. 10533:
Oxide-based Materials and Devices IX
David J. Rogers; David C. Look; Ferechteh H. Teherani, Editor(s)

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