Spontaneous Adsorption of Graphene Oxide on Multiple Polymeric Surfaces
Spontaneous Adsorption of Graphene Oxide on Multiple Polymeric Surfaces
复制标题
氧化石墨烯在多个聚合物表面的自发吸附
DOI：
10.1021/acs.langmuir.1c01214
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发表时间：
2021
期刊：
影响因子：
3.9
通讯作者：
Jiang Yuan
中科院分区：
文献类型：
--
作者：
Huang Qi-Qi;Wen Yue-E;Bai Hua;Zhang Zhisen;Jiang Yuan
低维纳米材料在固体表面上的可控集成对于下一代微型电子和光电器件的制造至关重要。例如，在聚合物表面组织二维（2D）纳米材料为可穿戴设备应用的柔性电子产品的开发铺平了道路。然而，对这些纳米材料与聚合物表面之间分子相互作用的理解仍然有限，这阻碍了基于二维纳米材料的功能涂层的合理设计。在目前的工作中，我们报道氧化石墨烯（GO）纳米片在分散相中可以自发地吸附在多个聚合物表面上。实验结果和模拟结果都表明，主要驱动力是氢键相互作用，尽管极性和色散等其他分子相互作用也有助于吸附。相对较高的氢键相互作用不仅导致GO表面覆盖率增加，而且增强了GO在聚合物表面上的吸附动力学。吸附的 GO 层非常坚固，这可以通过 GO 纳米片的大纵横比和多个分子相互作用点的存在来解释。作为概念证明，与原始对应物相比，GO 覆盖的聚甲基丙烯酸甲酯可有效减少表面静电荷。 GO成分的整合将许多惰性聚合物基材转变为多功能杂化物，并且GO上的官能团可进一步用于与其他功能材料桥接，以开发高性能电子器件。
The controllable integration of low-dimensional nanomaterials on solid surfaces is pivotal for the fabrication of next-generation miniaturized electronic and optoelectronic devices. For instance, organization of two-dimensional (2D) nanomaterials on polymeric surfaces paves the way for the development of flexible electronics for applications in wearable devices. Nevertheless, the understanding of the molecular interactions between these nanomaterials and the polymeric surfaces remains limited, which impedes the rational design of 2D nanomaterial-based functional coatings. In the current work, we report that graphene oxide (GO) nanosheets, in their dispersion phase, can be adsorbed on multiple polymeric surfaces in a spontaneous manner. Both experimental findings and simulational results indicate that the main driving force is hydrogen bonding interactions, although other molecular interactions such as polarity and dispersion ones contribute to the adsorption as well. The relatively high hydrogen bonding interactions cause not only increased GO surface coverage but also enhanced GO adsorption kinetics on polymeric surfaces. The adsorbed GO layers are robust, which can be explained by the large aspect ratios of GO nanosheets and the presence of multiple spots for molecular interactions. As a proof of concept, GO-covered polymethyl methacrylate effectively decreases surface static charges when compared with its pristine counterpart. The integration of the GO constituents turns many inert polymeric substrates into multifunctional hybrids, and the functional groups on GO can be used further to bridge with additional functional materials for the development of high-performance electronic devices.