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Hydrophobic carbon dots with blue dispersed emission and red aggregation-induced emission

Nature communications, 2019-04, Vol.10 (1), p.1789-1789, Article 1789 [Peer Reviewed Journal]

The Author(s) 2019. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;The Author(s) 2019 ;ISSN: 2041-1723 ;EISSN: 2041-1723 ;DOI: 10.1038/s41467-019-09830-6 ;PMID: 30996272

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  • Title:
    Hydrophobic carbon dots with blue dispersed emission and red aggregation-induced emission
  • Author: Yang, Haiyao ; Liu, Yingliang ; Guo, Zhouyi ; Lei, Bingfu ; Zhuang, Jianle ; Zhang, Xuejie ; Liu, Zhiming ; Hu, Chaofan
  • Subjects: Agglomeration ; Carbon ; Carbon dots ; Counterfeiting ; Dispersion ; Disulfide bonds ; Emission analysis ; Encryption ; Filter paper ; Fluorescence ; Hydrophobicity ; Nanomaterials ; Nanotechnology ; Powder
  • Is Part Of: Nature communications, 2019-04, Vol.10 (1), p.1789-1789, Article 1789
  • Description: Carbon dots (CDs) have been studied for years as one of the most promising fluorescent nanomaterials. However, CDs with red or solid-state fluorescence are rarely reported. Herein, through a one-pot solvothermal treatment, hydrophobic CDs (H-CDs) with blue dispersed emission and red aggregation-induced emission are obtained. When water is introduced, the hydrophobic interaction leads to aggregation of the H-CDs. The formation of H-CD clusters induces the turning off of the blue emission, as the carbonized cores suffer from π-π stacking interactions, and the turning on of the red fluorescence, due to restriction of the surfaces' intramolecular rotation around disulfide bonds, which conforms to the aggregation-induced-emission phenomenon. This on-off fluorescence of the H-CDs is reversible when the H-CD powder is completely dissolved. Moreover, the H-CD solution dispersed in filter paper is nearly colorless. Finally, we develop a reversible two switch-mode luminescence ink for advanced anti-counterfeiting and dual-encryption.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2041-1723
    EISSN: 2041-1723
    DOI: 10.1038/s41467-019-09830-6
    PMID: 30996272
  • Source: PubMed Central
    ProQuest Central
    DOAJ Directory of Open Access Journals
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