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High-Quality Single-Layer Graphene via Reparative Reduction of Graphene Oxide

ISSN号：1998-0124
期刊名称：Nano Research
时间：2011.5.5
页码：434-439
分类：TQ113.247[化学工程—无机化工] TB43[一般工业技术]
作者机构：[1]Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China, [2]College of Chemistry, Nankai University, Tianjin, 300071, China
相关基金：This work was supported by the National Natural Science Foundation of China （Grants Nos. 50802003, 20973013, 51072004, 50821061, and 20973006） and Ministry of Science and Technology of the people＇s Republic of China （Grants Nos. 2007CB936203, 2006CBP32602, and 2009CB929403）.
相关项目：石墨烯的偏析生长与能带调控

关键词：石墨氧化物, 单层, 透明导电薄膜, X射线光电子能谱, 品质, 还原, 修复, 含氧官能团, Graphene, graphene oxide, reparative reduction, transparent flexible electrode

中文摘要：

graphene 氧化物的减小(去) 是体积 graphene 的一条有希望的便宜合成途径，它把一条可存取的线路提供给透明进行电影和灵活电子学。不幸地，包含氧的功能的组的版本不可避免地留下空缺和拓扑的缺点在上减少去表，和它的低电的传导性妨碍实际应用程序的开发。这里，我们在场为与碳激进分子一起的新生的空缺的即时修理的策略由一位合适的先锋的热分解生产了。这样获得的单个层的 graphene 的表传导性被提起对 350410 S/cm 非常六倍(虽然保留 >96% 透明性) 。X 光检查光电子光谱学(XPS ) 和拉曼光谱学表明传导性改进能被归因于另外的 sp2-C 结构的形成。这个方法为获得高度传导性的透明 graphene 电影提供一个简单、有效的过程。

英文摘要：

Reduction of graphene oxide （GO） is a promising low-cost synthetic approach to bulk graphene, which offers an accessible route to transparent conducting films and flexible electronics. Unfortunately, the release of oxygen-containing functional groups inevitably leaves behind vacancies and topological defects on the reduced GO sheet, and its low electrical conductivity hinders the development of practical applications. Here, we present a strategy for real-time repair of the newborn vacancies with carbon radicals produced by thermal decomposition of a suitable precursor. The sheet conductivity of thus-obtained single-layer graphene was raised more than six-fold to 350-410 S/cm （whilst retaining 〉96% transparency）. X-ray photoelectron spectroscopy （XPS） and Raman spectroscopy revealed that the conductivity enhancement can be attributed to the formation of additional sp2-C structures. This method provides a simple and efficient process for obtaining highly conductive transparent graphene films.