Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 25, Pages 7231-7235Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201602445
Keywords
anti-counterfeiting; carbon dots; room temperature phosphorescence; triple-mode emission; up-conversion photoluminescence
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Funding
- Natural Science Foundation of China [21277149]
- Zhejiang Provincial Natural Science Foundation of China [LR13B050001]
- Ningbo Science and Technology Bureau [2014B82010]
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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.
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