Author(s): Wang, ZH (Wang, Zihao); Liu, ZD (Liu, Zhiduo); Gu, BL (Gu, Bingli); Gao, B (Gao, Bo); Wang, T (Wang, Ting); Zheng, XH (Zheng, Xiaohu); Wang, G (Wang, Gang); Guo, QL (Guo, Qinglei); Chen, D (Chen, Da)
Source: MATERIALS LETTERS Volume: 266 Article Number: 127468 DOI: 10.1016/j.matlet.2020.127468 Published: MAY 1 2020
Abstract: As an important approach for tuning the emission wavelength of graphene quantum dots (GQDs), controllable doping has attracted a great deal of attentions. Here, we reported an ultraviolet light-driven doping approach for GQDs at room temperature. N-doped graphene quantum dots (N-GQDs) are obtained via the reaction in dimethylformamide under the ultraviolet radiation. The emission wavelength can be tuned from 566 to 463 nm by controlling the doping concentration. The quantum yield of N-GQDs is demonstrated to be much higher than that of most reported GQDs and increases with the increase of the doping concentration. Finally, the synthesized N-GQDs are explored for the application in fluorescence bio-imaging. (C) 2020 Elsevier B.V. All rights reserved.
Accession Number: WOS:000520045700037
ISSN: 0167-577X
eISSN: 1873-4979
Full Text: https://linkinghub.elsevier.com/retrieve/pii/S0167577X20301737