On the Gelation of Graphene Oxide
On the Gelation of Graphene Oxide
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氧化石墨烯的凝胶化研究
DOI：
10.1021/jp1120299
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发表时间：
2011-04-07
影响因子：
3.7
通讯作者：
Shi, Gaoquan
中科院分区：
文献类型：
--
作者：
Bai, Hua;Li, Chun;Shi, Gaoquan
氧化石墨烯(GO)被认为是构建各种石墨烯超分子结构的独特的二维结构单元。在本文中，我们系统地研究了GO片层在水介质中的三维自组装形成水凝胶。不同的超分子相互作用可以促进GO的凝胶化，包括氢键、π堆积、静电相互作用和配位作用。此外，GO片材的横向尺寸对GO凝胶化也有很大影响。得到的GO水凝胶具有较低的临界凝胶浓度和良好的化学刺激可逆性。这些发现表明，GO具有丰富的超分子性质，其水凝胶可能具有多种技术应用。
Graphene oxide (GO) has been recognized as a unique two-dimensional building block for various graphene-based supramolecular architectures. In this article, we systematically studied the three-dimensional self-assembly of GO sheets in aqueous media to form hydrogels. The gelation of GO can be promoted by different supramolecular interactions, including hydrogen bonding, π-stacking, electrostatic interaction, and coordination. Furthermore, the lateral dimensions of GO sheets also have strong influences on GO gelation. The resulting GO hydrogels exhibited low critical gelation concentrations and good reversibility upon chemical stimulations. These findings indicate that GO has rich supramolecular properties, and its hydrogels may have a variety of technological applications.