A Photoaddressable Liquid Crystalline Phase Transition in Graphene Oxide Nanocomposites
A Photoaddressable Liquid Crystalline Phase Transition in Graphene Oxide Nanocomposites
复制标题
DOI：
10.1002/adfm.201900738
复制
发表时间：
2019-04
影响因子：
19
通讯作者：
M. Crespo;G. Santagiuliana;Olivier T. Picot;G. Portale;E. Bilotti;J. Gautrot
中科院分区：
文献类型：
--
作者：
M. Crespo;G. Santagiuliana;Olivier T. Picot;G. Portale;E. Bilotti;J. Gautrot
石墨烯的多功能性有可能开启纳米复合材料科学的重要发展。然而，在不干扰其独特性质的情况下操纵石墨烯，同时控制其空间组织仍然具有挑战性。在此，描述了通过用光可裂解刷稳定氧化石墨烯（GO）来形成光可寻址液晶（LC）溶液。LC行为导致GO热力学截留到低纵横比域中，所述低纵横比域不能显示通常针对石墨烯纳米复合材料预测的性质。这些纳米复合材料的形态和结构和电子性能通过刷状解理再生，这控制了LC相的相变。这些结果表明，石墨烯组装的动力学控制可以是一个有吸引力的工具，对可加工的溶胶状态和结构化的复合材料制造网络的动态调节。
The multifunctionality of graphene has the potential to unlock important developments in nanocomposite science. However, the manipulation of graphene without interfering with its unique properties and while controlling its spatial organization remains challenging. Here, the formation of a photoaddressable liquid crystalline (LC) solution through the stabilization of graphene oxide (GO) with photocleavable brushes is described. The LC behavior leads to the thermodynamic entrapment of GO into low aspect ratio domains that fail to display the properties typically predicted for graphene nanocomposites. The morphology and structural and electronic performance of these nanocomposites are regenerated through the brush cleavage, which controls the phase transition of the LC phase. These results show that kinetic control of graphene assembly can be an attractive tool toward the dynamic regulation of processable sol states and structured percolated networks for rational composite manufacturing.