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Engineering a Water-Dispersible, Conducting, Photoreduced Graphene Oxide

Konkena, Bharathi and Vasudevan, Sukumaran (2015) Engineering a Water-Dispersible, Conducting, Photoreduced Graphene Oxide. In: JOURNAL OF PHYSICAL CHEMISTRY C, 119 (11). pp. 6356-6362.

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Official URL: http://dx.doi.org/10.1021/jp512759w

Abstract

A critical limitation that has hampered widespread application of the electrically conducting reduced graphene oxide (r-GO) is its poor aqueous dispersibility. Here we outline a strategy to obtain water-dispersible conducting r-GO sheets, free of any stabilizing agents, by exploiting the fact that the kinetics of the photoreduction of the insulating GO is heterogeneous. We show that by controlling UV exposure times and pH, we can obtain r-GO sheets with the conducting sp(2)-graphitic domains restored but with the more acidic carboxylic groups, responsible for aqueous dispersibility, intact. The resultant photoreduced r-GO sheets are both conducting and water-dispersible.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Keywords: GRAPHITE OXIDE; REDUCTION; SHEETS; CARBON; NANOCOMPOSITES; NANOSHEETS; CHEMISTRY; LAYER; ACIDS
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: Id for Latest eprints
Date Deposited: 28 Apr 2015 07:55
Last Modified: 28 Apr 2015 07:55
URI: http://eprints.iisc.ac.in/id/eprint/51438

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