作者：C. Zhang, L. L. Ren, X. Y. Wang, T. X. Liu*
关键字：Graphene Oxide, Carbon Nanotubes, Dispersion
论文来源：期刊
具体来源：J. Phys. Chem. C, 2010, 114(26), 11435-11440.
发表时间：2010年

Graphene oxide (GO) sheets, considered as “soft” two-dimensional macromolecules containing multiple aromatic regions and hydrophilic oxygen groups, can adsorb the pristine multiwalled carbon nanotubes (MWNTs) through the π-stacking interaction, thus causing pristine MWNTs to stably disperse and fractionate in aqueous media. The water-soluble and insoluble complexes can be obtained by changing the initial proportion of MWNTs to GO sheets, which are important for noncovalent approaches toward solubilizing CNTs and open a new way for GO applications in colloidal chemistry. Solubility results indicate that the GO sheets are prone to stabilize MWNTs with larger diameters. When the diameters of CNTs decrease to a critical value, the π-stacking interactions are weakened by large surface energy among CNTs themselves; the CNTs are inclined to form bundles or twisted structures instead of CNT-GO complexes. This can be probably developed into a practical method to fractionate MWNTs with different outer diameters in water.