Graphene Microtubings: Controlled Fabrication and Site-Specific Functionalization
Graphene Microtubings: Controlled Fabrication and Site-Specific Functionalization
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石墨烯微管：受控制造和特定位点功能化
DOI：
10.1021/nl303243h
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发表时间：
2012-11-01
期刊：
影响因子：
10.8
通讯作者：
Qu, Liangti
中科院分区：
文献类型：
--
作者：
Hu, Chuangang;Zhao, Yang;Qu, Liangti
通过工程来操纵石墨烯用于具有实际重要性的宏观组件是一个巨大的挑战。我们开发了一种双几何约束方法，用于可扩展地制备具有可调直径的米长石墨烯微管（mu GT）。它们具有与石墨烯纤维相当的强度，并且可以以直接的方式成形为分层多通道mu GT系统。特别重要的是，μ GT可以在特定的外壁、内壁、外壁/内壁和壁内方式中选择性地官能化，这赋予μ GT用于期望的应用的独特性质。除了在此开发的磁响应和光电响应μ GT之外，还实现了由Pt内壁改性的μ GT制成的自供电微电机，其在水介质中显示敏捷运动。除了在这项研究中展示的应用之外，定义明确的mu GT系统还可以在其他重要领域发挥重要作用，例如流体学，催化，纯化，分离和传感。
Manipulating graphene through engineering for macroscopic assemblies of practical importance is a big challenge. We develop a dually geometric confinement approach for the scalable preparation of meter-long graphene microtubings (mu GTs) With a tunable diameter. They have strength comparable to graphene fiber and can be shaped to hierarchical multichannel mu GT systems in a straightforward way. Of particular importance, mu GTs Can be selectively functionalized in a site specific outer wall, inner wall, outer/inner-wall, and within wall fashion, which endows the mu GT With unique properties for desirable applications Apart from the magnetically and photoelectronically responsive mu GT developed here, a self powered micromotor made of Pt inner wall modified mu GT showing agile motion in aqueous medium has been also achieved. Beyond the applications demonstrated in this study, the well-defined mu GT systems can also play essential role in other important fields such as fluidics, catalysis,purification, separation, and sensing.