摘要
石墨烯量子点(GQDs)因其潜在的全光谱荧光可调控性和稳定性,在环境化学、物理器件、生物医药等诸多领域被认为是最有前景的纳米材料之一。探索GQDs的荧光发光机理,调控荧光能谱,进一步开发可控性合成与生长途径和工艺,尤其可批量及规模化生产方式,是GQDs器件应用中亟待解决的关键问题。从自上而下(Top-down)法、自下而上(Bottom-up)法和表面修饰等3个方面介绍了荧光GQDs的制备及调控,比较了GQDs与其它量子点材料荧光性质的异同,并重点综述了GQDs的量子限域效应以及边缘态和表面态对其光致荧光性质的影响。
Graphene quantum dots(GQDs)are considered to be one of the most promising nanomaterials in envi-ronmental chemistry,device application and biomedical fields because of the spectral tunable range of their pho-toluminescence and their stabilities.The investigation of photoluminescence mechanism the design of fluores-cence spectrum and the further development of controllable synthesis methods especially large-scale preparation remains to be challenging in the application of GQDs.In this paper,the GQDs preparation methods including Top-down method,Bottom-up method and surface modification are briefly introduced.The photoluminescence properties and characteristics of GQDs and other quantum dot materials were compared.The influence of quan-tum confinement effect and edge or surface states on the photoluminescence properties of GQDs is reviewed.
作者
万吉祥
陈小源
王聪
方小红
WAN Jixiang;CHEN Xiaoyuan;WANG Cong;FANG Xiaohong(Thin Film Optoelectronic Technology Center, Shanghai Advanced Research InstituteChinese Academy of Sciences, Shanghai 201210, China;Shanghai Tech University? Shanghai 201210, China;University of Chinese Academy of Science,Beijing 100049,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2017年第8期24-31,共8页
Journal of Functional Materials
关键词
石墨烯量子点
制备方法
荧光机理
graphene quantum dots
synthetic methods
fluorescence mechanism
