Bramhaiah, K. and Singh, Vidya N. and Kavitha, C. and John, Neena S. (2017) Films of Reduced Graphene Oxide with Metal Oxide Nanoparticles Formed at a Liquid/Liquid Interface as Reusable Surface Enhanced Raman Scattering Substrates for Dyes. Journal of Nanoscience and Nanotechnology, 17 (4). pp. 2711-2719. ISSN 1533-4880

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Abstract

Free standing, thin films of reduced graphene oxide (rGO) with ZnO, CuO and SnO2 nanostructures are prepared at a water/toluene interface utilizing simple interfacial reaction and self-assembly. rGO-ZnO, rGO-CuO and rGO-SnO2 films exhibit unique morphologies such as hexagonal cylinders, elongated splinters, and balls, respectively, wrapped by rGO layers. The hybrid films exhibit surface enhanced Raman scattering (SERS) of rhodamine 6G dye with enhancement factors one order higher than bare metal oxide caused by a synergic effect of charge transfer between the dye, metal oxide and rGO. Doping with Ag+ ions improves SERS enhancement in rGO-Ag-ZnO hybrid films, exploiting the electromagnetic effect of metal surface plasmons. Detection sensitivity up to 10 mu M dye with an enhancement factor of 104 is shown. The enhanced photodegradation rate by the hybrid films is utilized for UV induced regeneration of the used SERS substrate and is demonstrated for successive use of different analytes.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s American Scientific Publishers.
Subjects:	Chemistry Materials Science Applied Physics/Condensed Matter Nanoscience/ Nanotechnology
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	10 Oct 2018 08:05
Last Modified:	10 Oct 2018 08:05
URI:	http://npl.csircentral.net/id/eprint/2725

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