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Graphene Oxide as a Two-dimensional Surfactant

Published online by Cambridge University Press:  06 September 2011

Andrew R. Koltonow ,
Jaemyung Kim ,
Laura J. Cote ,
Jiayan Luo  and
Jiaxing Huang
Andrew R. Koltonow
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, USA
Jaemyung Kim
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, USA
Laura J. Cote
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, USA
Jiayan Luo
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, USA
Jiaxing Huang
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, USA
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Abstract

Graphene oxide (GO) is a nonstoichiometric two-dimensional material obtained from the chemical oxidation and exfoliation of graphite, which has recently attracted intense research interest as a precursor for bulk production of graphene. GO has long been believed to be hydrophilic due to its dispersibility in water. Recent work in our group, however, has found that GO is actually a two-dimensional amphiphile; the edge of the sheet-like material is hydrophilic, while the basal plane of the material contains more hydrophobic graphitic nanodomains. To prove the concept, we demonstrate GO’s surface activity at an air-water interface, as well as its utility in dispersing insoluble aromatic materials such as toluene, graphite, and carbon nanotubes in water. As a colloidal surfactant which can be converted to a conducting material, GO presents unique possibilities for aqueous solution processing of organic electronic materials.

Keywords

Cdispersantcolloid
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1344: Symposium Y – Functional Two-Dimensional Layered Materials—From Graphene to Topological Insulators , 2011 , mrss11-1344-y09-07
Copyright
Copyright © Materials Research Society 2011

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