Spatial and Temporal Control of the Diazonium Modification of sp2 Carbon Surfaces

Interest in the controlled chemical functionalization of sp2 carbon materials using diazonium compounds has been recently reignited, particularly as a means to generate a band gap in graphene. We demonstrate local diazonium modification of pristine sp2 carbon surfaces, with high control, at the micr...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2014-01, Vol.136 (1), p.36-39
Main Authors: Kirkman, Paul M, Güell, Aleix G, Cuharuc, Anatolii S, Unwin, Patrick R
Format: Article
Language:English
Online Access:Get full text
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Summary:Interest in the controlled chemical functionalization of sp2 carbon materials using diazonium compounds has been recently reignited, particularly as a means to generate a band gap in graphene. We demonstrate local diazonium modification of pristine sp2 carbon surfaces, with high control, at the micrometer scale through the use of scanning electrochemical cell microscopy (SECCM). Electrochemically driven diazonium patterning is investigated at a range of driving forces, coupled with surface analysis using atomic force microscopy (AFM) and Raman spectroscopy. We highlight how the film density, level of sp2/sp3 rehybridization and the extent of multilayer formation can be controlled, paving the way for the use of localized electrochemistry as a route to controlled diazonium modification.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja410467e