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Issue 2, 2012
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Charging of unfunctionalized graphene in organic solvents

Wei Wei Liu,a  Jian Nong Wang*b  and  Xiao Xia Wangc 
Author affiliations

* Corresponding authors

a School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, P.R. China

b School of Mechanical and Power Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, P.R. China
E-mail: jnwang@ecust.edu.cn

c School of Materials Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, P.R. China

Abstract

Unfunctionalized graphene is positively or negatively charged when it is dispersed in organic solvents. The charging is negative in solvents with high electron donor numbers and positive in those with low donor numbers. We suggest that the charging originates from electron transfer between graphene surfaces and solvent molecules, and the stable dispersion of unfunctionalized graphene in organic solvents is mainly controlled by electrostatic repulsion between the charged graphene surfaces.

Graphical abstract: Charging of unfunctionalized graphene in organic solvents

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Publication details

The article was received on 23 Jul 2011, accepted on 02 Nov 2011 and first published on 22 Nov 2011


Article type: Communication
DOI: 10.1039/C1NR10921A
Citation: Nanoscale, 2012,4, 425-428
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    Charging of unfunctionalized graphene in organic solvents

    W. W. Liu, J. N. Wang and X. X. Wang, Nanoscale, 2012, 4, 425
    DOI: 10.1039/C1NR10921A

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