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Carbon-Based Dots Co-doped with Nitrogen and Sulfur for High Quantum Yield and Excitation-Independent Emission

Authors

  • Dr. Yongqiang Dong,

    1. School of Chemical and Biomedical Engineering and Center for Advanced Bionanosystems, Nanyang Technological University, Singapore 637457 (Singapore)
    2. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
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  • Dr. Hongchang Pang,

    1. School of Chemical and Biomedical Engineering and Center for Advanced Bionanosystems, Nanyang Technological University, Singapore 637457 (Singapore)
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  • Dr. Hong Bin Yang,

    1. School of Chemical and Biomedical Engineering and Center for Advanced Bionanosystems, Nanyang Technological University, Singapore 637457 (Singapore)
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  • Dr. Chunxian Guo,

    1. School of Chemical and Biomedical Engineering and Center for Advanced Bionanosystems, Nanyang Technological University, Singapore 637457 (Singapore)
    2. Department of Physics, Faculty of Science, Nanyang Technological University, Singapore 117542 (Singapore)
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  • Prof. Jingwei Shao,

    1. College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108 (China)
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  • Prof. Yuwu Chi,

    1. College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350108 (China)
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  • Prof. Chang Ming Li,

    Corresponding author
    1. School of Chemical and Biomedical Engineering and Center for Advanced Bionanosystems, Nanyang Technological University, Singapore 637457 (Singapore)
    2. Institute for Clean Energy & Advanced Materials, Southwest University, Chongqing 400715 (China)
    3. Chongqing Key Laboratory for Advanced Materials & Technologies of Clean Energies, Chongqing 400715 (China)
    • School of Chemical and Biomedical Engineering and Center for Advanced Bionanosystems, Nanyang Technological University, Singapore 637457 (Singapore)
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  • Prof. Ting Yu

    Corresponding author
    1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
    2. Department of Physics, Faculty of Science, Nanyang Technological University, Singapore 117542 (Singapore)
    • Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
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  • This work is financially supported by the Singapore National Research Foundation Grant under NRF-CRP2-2007-0 and NRF-RF2010-07, MOE Tier 2 MOE2009-T2-1-037, and the Institute for Clean Energy & Advanced Materials, Southwest University, Chongqing, China and Chongqing Key Lab for Advanced Materials and Technologies of Clean Electrical Power Sources, Chongqing 400715, China.

Abstract

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Hilfreiche Elemente: Eine einfache Bottom-up-Methode mit Zitronensäure und L-Cystein als Vorstufen ermöglicht die Synthese von mit Stickstoff und Schwefel codotierten Graphenquantenpunkten (GQDs). Das Ergebnis sind eine neue Art und eine hohe Dichte der GQD-Oberflächenzustände mit hohen Ausbeuten (über 70 %) und einer anregungsunabhängigen Emission. FLQY: Fluoreszenzquantenausbeute.

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