文献类型：期刊文献

英文题名：Charging of unfunctionalized graphene in organic solvents

作者：Liu, Wei Wei[2];Wang, Jian Nong[1];Wang, Xiao Xia[3]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China;[3]Tongji Univ, Sch Mat Sci & Engn, Shanghai 200092, Peoples R China

年份：2012

卷号：4

期号：2

起止页码：425

外文期刊名：NANOSCALE

收录：;EI(收录号：20120214679360);WOS:【SCI-EXPANDED(收录号:WOS:000298854300014)】；

基金：JNW is thankful to the research funds from The National Natural Science Foundation of China (project # 50871067), from The Ministry of Science and Technology of China (the National 863 projects, 2007AA05Z128, 2009AA034400), and from the Shanghai Promotion Centre for Nano Science and Technology (project # 1052nm01900).

语种：英文

外文关键词：Organic solvents

摘要：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.