Size Effect of Graphene Quantum Dots on Photoluminescence

被引：37
|
作者：
Liu, Ziyi [1 ]
Li, Fei [1 ]
Luo, Yi [1 ]
Li, Ming [1 ]
Hu, Guanghui [1 ]
Pu, Xianjuan [2 ]
Tang, Tao [1 ]
Wen, Jianfeng [1 ]
Li, Xinyu [1 ]
Li, Weitao [3 ]
机构：
[1] Guilin Univ Technol, Coll Sci, Guilin 541004, Peoples R China
[2] Shanghai Univ, Shanghai Appl Radiat Inst, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China
[3] Zhongyuan Univ Technol, Text & Garment Ind Res Inst, Zhengzhou 450007, Peoples R China
来源：
MOLECULES | 2021年 / 26卷 / 13期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
graphene quantum dots; size effect; photoluminescence; CARBON NANODOTS; SCALE SYNTHESIS; SOLAR-CELLS; EFFICIENT; PROBE; LUMINESCENCE; ENHANCEMENT; SULFUR;
D O I：
10.3390/molecules26133922
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
High-photoluminescence (PL) graphene quantum dots (GQDs) were synthesized by a simple one-pot hydrothermal process, then separated by dialysis bags of different molecular weights. Four separated GQDs of varying sizes were obtained and displayed different PL intensities. With the decreasing size of separated GQDs, the intensity of the emission peak becomes much stronger. Finally, the GQDs of the smallest size revealed the most energetic PL intensity in four separated GQDs. The PL energy of all the separated GQDs shifted slightly, supported by density functional theory calculations.
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页数：10
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