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  • Rational Design of Multi-Color-Emissive Carbon Dots in a Single Reaction System by Hydrothermal

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    Author(s)
    Wang, B
    Yu, J
    Sui, L
    Zhu, S
    Tang, Z
    Yang, B
    Lu, S
    Griffith University Author(s)
    Tang, Zhiyong
    Year published
    2021
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    Abstract
    As an emerging building unit, carbon dots (CDs) have been igniting the revolutionaries in the fields of optoelectronics, biomedicine, and bioimaging. However, the difficulty of synthesizing CDs in aqueous solution with full-spectrum emission severely hinders further investigation of their emission mechanism and their extensive applications in white light emitting diodes (LEDs). Here, the full-color-emission CDs with a unique structure consisting of sp3-hybridized carbon cores with small domains of partially sp2-hybridized carbon atoms are reported. First-principle calculations are initially used to predict that the transformation ...
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    As an emerging building unit, carbon dots (CDs) have been igniting the revolutionaries in the fields of optoelectronics, biomedicine, and bioimaging. However, the difficulty of synthesizing CDs in aqueous solution with full-spectrum emission severely hinders further investigation of their emission mechanism and their extensive applications in white light emitting diodes (LEDs). Here, the full-color-emission CDs with a unique structure consisting of sp3-hybridized carbon cores with small domains of partially sp2-hybridized carbon atoms are reported. First-principle calculations are initially used to predict that the transformation from sp3 to sp2 hybridization redshifts the emission of CDs. Guided by the theoretical predictions, a simple, convenient, and controllable route to hydrothermally prepare CDs in a single reaction system is developed. The prepared CDs have full-spectrum emission with an unprecedented two-photon emission across the whole visible color range. These full-color-emission CDs can be further nurtured by slight modifications of the reaction conditions (e.g., temperature, pH) to generate the emission color from blue to red. Finally a flexible LEDs with full-color emission by using epoxy CDs films is developed, indicating that the strategy affords an industry translational potential over traditional fluorophores.
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    Journal Title
    Advanced Science
    Volume
    8
    Issue
    1
    DOI
    https://doi.org/10.1002/advs.202001453
    Copyright Statement
    © 2020 The Authors. Published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
    Note
    This publication has been entered in Griffith Research Online as an advanced online version.
    Subject
    Nanomaterials
    Image processing
    Publication URI
    http://hdl.handle.net/10072/408891
    Collection
    • Journal articles

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