Graphene quantum dots with controllable surface oxidation, tunable fluorescence and up-conversion emission

被引：360
作者：
Zhu, Shoujun [1 ]
Zhang, Junhu [1 ]
Liu, Xue [1 ]
Li, Bo [1 ]
Wang, Xingfeng [1 ]
Tang, Shijia [1 ]
Meng, Qingnan [1 ]
Li, Yunfeng [1 ]
Shi, Ce [1 ]
Hu, Rui [1 ]
Yang, Bai [1 ]
机构：
[1] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China
来源：
RSC ADVANCES | 2012年 / 2卷 / 07期
基金：
美国国家科学基金会;
关键词：
LUMINESCENT CARBON NANODOTS; LOW CYTOTOXICITY; NANOPARTICLES; ROUTE; SHEETS; BRIGHT; OXIDE; SIZE;
D O I：
10.1039/c2ra20182h
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
引用
收藏
页码：2717 / 2720
页数：4
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