Size Effect of Graphene Quantum Dots on Photoluminescence

Molecules

Fei Li¹  Tao Tang¹  Yi Luo¹  Jianfeng Wen¹  Guanghui Hu¹  Xinyu Li¹  Ming Li¹  Ziyi Liu¹  Xianjuan Pu²  Weitao Li³ 

[1] College of Science, Guilin University of Technology, Guilin 541004, China;Shanghai Applied Radiation Institute, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;Textile and Garment Industry of Research Institute, Zhongyuan University of Technology, Zhengzhou 450007, China;

关键词: graphene quantum dots;    size effect;    photoluminescence;   

DOI  :  10.3390/molecules26133922

来源: DOAJ

【 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.

【 授权许可】

Unknown