Tunable excitation-dependent-fluorescence of carbon dots: Fingerprint curves for super anti-counterfeiting. (March 2020)

• Record Type: Journal Article
• Authors: Cheng, Ke; Qi, Rui; Lan, Shuai; Wang, Hongyang; Zheng, Xuefang; Liu, Chun; Jia, Dandan; Cao, Lei; Wang, Dongjun
• Is Part Of: Dyes and pigments. Volume 174(2020)
• Publication Date: 2020-03
• Subjects: Carbon dots -- Excitation-dependent fluorescence -- Concentration-dependent fluorescence -- Anti-Counterfeiting; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2019.108106
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: 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. Graphical abstract: A novel concept of anti-counterfeiting is proposed, based on the unique excitation-dependent-fluorescence (EDF) of carbon dots (CDs). Multi-emission in EDF spectrum as unique and sophisticated as human fingerprints is highly difficult to replicate. Image 1 Highlights: Excitation-dependent-fluorescence (EDF) of carbon dots (CDs) is a novel concept of anti-counterfeiting. Multi-emission in EDF spectra as unique and sophisticated as human fingerprints is highly difficult to replicate. EDF behaviors can be tuned by adjusting the concentration of CDs or changing species of CDs and their corresponding matrix.