Issue 2, 2012
From the journal:

Nanoscale

Charging of unfunctionalized graphene in organic solvents†

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

* 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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Article information

DOI
https://doi.org/10.1039/C1NR10921A
Article type
Communication
Submitted
23 Jul 2011
Accepted
02 Nov 2011
First published
22 Nov 2011

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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