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Facile preparation of N-doped graphene quantum dots as quickly-dried fluorescent ink for anti-counterfeiting

Abstract

Simple anti-counterfeiting printing using biocompatible, non-toxic and highly efficient luminescence materials play crucial roles in economic and social fields as well as in our daily lives. In this work, new nitrogen doped graphene quantum dots (N-GQDs) are synthesized and applied to prepare quickly-dried fluorescent ink for both writing and printing. The N-GQDs are synthesized based on one-step bottom-up molecular fusion between 1,3,6-trinitropyrene in triethylamine in a solvothermal process with a high yield of 84.6%. Triethylamine simultaneously act as reaction media and nitrogen-doping agent for the formation of fluorescencent N-GQDs. The as-prepared N-GQDs exhibit single-layer graphene structure, high crystallinity, uniform size and excitation-independent fluorescencent emission with narrow half-peak width (66 nm). Successful doping of N atom in GQDs enables bright blue fluorescence with high Simple anti-counterfeiting printing using biocompatible, non-toxic and highly efficient luminescence materials play crucial roles in economic and social fields as well as in our daily lives. In this work, new nitrogen doped graphene quantum dots (N-GQDs) are synthesized and applied to prepare quickly-dried fluorescent ink for both writing and printing. The N-GQDs are synthesized based on one-step bottom-up molecular fusion between 1,3,6-trinitropyrene in triethylamine in a solvothermal process with a high yield of 84.6%. Triethylamine simultaneously act as reaction media and nitrogen-doping agent for the formation of fluorescencent N-GQDs. The as-prepared N-GQDs exhibit single-layer graphene structure, high crystallinity, uniform size and excitation-independent fluorescencent emission with narrow half-peak width (66 nm). Successful doping of N atom in GQDs enables bright blue fluorescence with high absolute photoluminescence quantum yield (17.8%). Owing to excellent photostability and good solubility in ethanol, N-GQDs are applied to easily prepare quickly-dried fluorescent ink for both writing and printing by simple blending GQDs with glycerol in the ethanol medium. Moreover, synthesis of fluorescent power and hydrogel is also achieved.

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Supplementary files

Publication details

The article was received on 12 Jul 2018, accepted on 07 Sep 2018 and first published on 08 Sep 2018


Article type: Paper
DOI: 10.1039/C8NJ03375G
Citation: New J. Chem., 2018, Accepted Manuscript
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    Facile preparation of N-doped graphene quantum dots as quickly-dried fluorescent ink for anti-counterfeiting

    Y. Pang, R. Zhao, Y. Lu, J. Liu, X. Dong and F. Xi, New J. Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8NJ03375G

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