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Evidence of Electrochemical Graphene Functionalization by Raman Spectroscopy

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Abstract:

Electrochemical functionalization of treated epitaxial graphene samples on Si-face 6H-SiC are presented in this work. Three semi-insulating 6H-SiC substrates cut from different boules with varying off cut angle (on axis, 0.5° and 1.0° degrees off axis in the [112‾0] direction) were diced into 10mm x 10mm samples and quality EG grown on top. A home-build electrochemical cell was used with current applied though a 10% H2SO4 solution, with a Pt wire and exposed graphene as the anode and cathode respectively. Functionalization was determined using Raman spectroscopy and measured by an increase in D/G ratio, increase in fluorescence background and introduction of C-H bond peak at ~2930 cm-1. Components of the Raman spectra before and after functionalization of all samples used were analyzed to show a substrate dependent effect on functionalization with values such as D/G ratio and normalized fluorescence slope varying between the substrates.

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Info:

Periodical:

Materials Science Forum (Volumes 717-720)

Pages:

661-664

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.717-720.661

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Online since:

May 2012

Authors:

Kevin M. Daniels, Biplob K. Daas, Nishtha Srivastava, Christopher Williams, Randall M. Feenstra, Tangali S. Sudarshan, M.V.S. Chandrashekhar

Keywords:

Electrochemistry, Functionalization, Graphen, RAMAN

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