17 October 2012 Gold-coated nanoporous substrates for SERS studies
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Abstract
The Raman signal of inelastically scattered photons represents the fingerprint of a chemical molecule. Therefore, surface enhanced Raman spectroscopy (SERS) can be employed as the selective mechanism for an extraordinary optics sensor sensitive enough to detect a single molecule. Such sensitivity makes SERS ideal to detect chemicals at parts per billion to parts per trillion concentrations. SERS studies benefit from a signal enhancing substrate that is both reproducible and cost effective. Commercial substrates produced by electron beam lithography cost approximately $100 a piece to manufacture and can only be used once. The purpose of this study is to design a SERS substrate that offers enhancement equivalent to the commercial standard and is cheaper to produce. Experiments confirm that gold (Au) coated nano-pores can be used as an optimal SERS substrate offering a promising enhancement with durability that rival commercial products.
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P. D. Robinson, P. D. Robinson, A. Kassu, A. Kassu, A. Sharma, A. Sharma, T. Kukhtareva, T. Kukhtareva, P. Ruffin, P. Ruffin, C. Brantley, C. Brantley, E. Edwards, E. Edwards, "Gold-coated nanoporous substrates for SERS studies", Proc. SPIE 8465, Nanostructured Thin Films V, 84650P (17 October 2012); doi: 10.1117/12.928788; https://doi.org/10.1117/12.928788
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