摘要
石墨烯因其独特的物理化学性质以及潜在的巨大应用价值引起了越来越多的研究兴趣,但其特殊的零带隙结构却限制了它在光电领域的应用。半导体量子点因其特有的量子尺寸效应而表现出迷人的光学性能,已成功应用于生物标记及电化学等领域,但电子-空穴对易复合湮灭,导致电子迁移率较低,限制了其在光电转换方面的应用。石墨烯独特的结构和电子特性使其成为优秀的导电支架,可从量子点中捕获并输运电子,实现了电子空穴对的有效分离。石墨烯-量子点复合材料不仅具有石墨烯的高电子传输性能,而且具备量子点特殊结构产生的量子尺寸效应和边缘效应,二者复合后在纳米器件和光电器件等领域极具应用潜力。本文详细总结了近年来石墨烯-量子点复合材料的制备方法,包括相转移法、静电复合、水热和溶剂热法以及电化学法和微波辅助法等,并简要介绍了相关应用领域的研究进展,以期为石墨烯基纳米复合材料的发展研究提供相关的参考与依据。
Due to its unique physical and chemical properties and promising widespread application value, graphene has been attracting intensive research interest. However, it has been limited the applications in the field of optoelectronics due to its special structure of zero bandgap. Semiconductor quantum dots （QDs） exhibit the fascinating optical properties associated with its special quantum size effect. They have been successfully applied in biological detection and optoelectronic applications. But the recombination and annihilation between the electrons and the holes greatly restrict the QDs application in optoelectronic conversion because it lowers the electron conductivity and mobility. The special electronic properties and structures of graphene make it an excellent conductive scaffolds, which would capture and transport electrons from the excited QDs and also effectively separate the electron-hole pair. Therefore, graphene-QDs composites would be an good candidate for combining the advantages of two materials. Graphene-QDs composites not only inherit the high speed electron transport property of the intrinsic graphene, but also possess the quantum size effect and edge effect origining from the special structure of QDs, suggesting the potential applications in the fields of nanodevices andoptoelectronics. In this paper, we summerized the synthetic methods of graphene-QDs composites, including the phase-transfer methods, electrostatic compound strategies, hydrothermal and solvothermal methods, electrochemical template method and the microwave-assisted ways. The brief introduction of the applications has also been presented, which would provide the reference for the research and development of graphene-based nanocomposites.
出处
《化学进展》
SCIE
CAS
CSCD
北大核心
2014年第2期270-276,共7页
Progress in Chemistry
基金
中央高校自由探索项目(No.lzujbky-2013-186)
甘肃省自然科学基金项目(No.1208RJYA005)资助~~
关键词
石墨烯-量子点复合材料
制备方法
应用
graphene-quantum dot composites
synthesis methods
applications
