Journal
DYES AND PIGMENTS
Volume 174, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2019.108106
Keywords
Carbon dots; Excitation-dependent fluorescence; Concentration-dependent fluorescence; Anti-Counterfeiting
Funding
- Center of Analysis and Measurement [2018005]
- Doctoral Scientific Research Foundation of Hebei Normal Univeristy of Science and Technology [2019Y8003]
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A novel concept of anti-counterfeiting is proposed, based on the special properties of excitation-dependent-fluorescence (EDF) and emission-dependent-excitation (EDE) of carbon dots (CDs) in polymer matrix. EDF and EDE behaviors can be controlled by adjusting the concentration of CDs or changing species of CDs and their corresponding polymer matrix. Meanwhile, multi-emission in EDF spectrum is observed, which is helpful to identification. Particularly, the curves in EDF or EDE spectrum as unique and sophisticated as human fingerprints are highly difficult to replicate, which promise practical applications of CDs in the field of anti-counterfeiting.
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