An approach to controlling the fluorescence of graphene quantum dots: From surface oxidation to fluorescent mechanism

被引：9

作者：

Hu Yin ^{[1
]}

He Da-Wei ^{[1
]}

Wang Yong-Sheng ^{[1
]}

Duan Jia-Hua ^{[1
]}

Wang Su-Feng ^{[1
]}

Fu Ming ^{[1
]}

Wang Wen-Shuo ^{[1
,2
]}

机构：

[1] Beijing Jiaotong Univ, Inst Optoelect Technol, Minist Educ, Key Lab Luminescence & Opt Informat, Beijing 100044, Peoples R China

[2] Univ Erlangen Nurnberg, Inst Particle Technol, D-91058 Erlangen, Germany

来源：

CHINESE PHYSICS B | 2014年 / 23卷 / 12期

基金：

中国国家自然科学基金; 北京市自然科学基金;

关键词：

graphene quantum dots; tunable luminescence; TUNABLE FLUORESCENCE; CARBON-FIBERS; UP-CONVERSION; PHOTOLUMINESCENCE; SHEETS; BLUE;

D O I：

10.1088/1674-1056/23/12/128103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a facile method of synthesizing graphene quantum dots (GQDs) with tunable emission. The as-prepared GQDs each with a uniform lateral dimension of ca. 6 nm have fine solubility and high stability. The photoluminescence mechanism is further investigated based on the surfacestructure and the photoluminescence behaviors. Based on our discussion, the green fluorescence emission can be attributed to the oxygen functional groups, which could possess broad emission bands within the pi-pi* gap. This work is helpful to explain the vague fluorescent mechanism of GQDs, and the reported synthetic method is useful to prepare GQDs with controllable fluorescent colors.

引用

页数：7

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