title: Triple-Mode Emission of Carbon Dots: Applications for Advanced Anti-Counterfeiting.
abstract: Photoluminescence (PL), up-conversion PL (UCPL), and phosphorescence are three kinds of phenomena common to light-emitting materials, but it is very difficult to observe all of them simultaneously when they are derived from a single material at room temperature. For the first time, triple-mode emission (that is, PL, UCPL, and room temperature phosphorescence (RTP)) is reported, which relies on a composite of the luminescent carbon dots (CDs) prepared from m-phenylenediamine and poly(vinyl alcohol) (PVA). Moreover, the CDs-PVA aqueous dispersion is nearly colorless and demonstrates promise as a triple-mode emission ink in the field of advanced anti-counterfeiting.
authors.affiliation: Key Laboratory of Additive Manufacturing Materials of Zhejiang Province, Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy Sciences, Ningbo, 315201, China.|Department of Applied Physics, Chongqing University, Chongqing, 401331, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Jiang
authors.affiliation: Key Laboratory of Additive Manufacturing Materials of Zhejiang Province, Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy Sciences, Ningbo, 315201, China.
authors.forename: Ling
authors.initials: L
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Bioelectronics, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Lu
authors.affiliation: State Key Laboratory of Bioelectronics, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China.
authors.forename: Chunxiang
authors.initials: C
authors.lastname: Xu
authors.affiliation: Department of Applied Physics, Chongqing University, Chongqing, 401331, China.
authors.forename: Congzhong
authors.initials: C
authors.lastname: Cai
authors.affiliation: Key Laboratory of Additive Manufacturing Materials of Zhejiang Province, Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy Sciences, Ningbo, 315201, China. linhengwei@nimte.ac.cn.
authors.forename: Hengwei
authors.initials: H
authors.lastname: Lin
keywords: anti-counterfeiting; carbon dots; room temperature phosphorescence; triple-mode emission; up-conversion photoluminescence