Graphene quantum dots with controllable surface oxidation, tunable fluorescence and up-conversion emission
Graphene quantum dots with controllable surface oxidation, tunable fluorescence and up-conversion emission
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具有可控表面氧化、可调荧光和上转换发射的石墨烯量子点
DOI：
10.1039/c2ra20182h
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发表时间：
2012-01-01
期刊：
影响因子：
3.9
通讯作者：
Yang, Bai
中科院分区：
文献类型：
--
作者：
Zhu, Shoujun;Zhang, Junhu;Yang, Bai
本文采用两步法制备了表面化学可调的石墨烯量子点(GQD)。GQD具有表面氧化程度可调的荧光、良好的溶解性、高的稳定性和适用的上转换发光(PL)。从表面结构和发光行为两个方面探讨了发光机理。更重要的是，GQD具有酸碱响应特性，可作为pH传感器使用。
In this article, graphene quantum dots (GQDs) with tunable surface chemistry (increasing oxidation degree) were prepared by an efficient two-step method. The GQDs have tunable fluorescence induced by the degree of surface oxidation, fine solubility, high stability and applicable up-conversion photoluminescence (PL). The PL mechanism was investigated based on the surface structure and PL behaviors. More importantly, the GQDs have acid-base response property and can be applied as pH sensors.