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  • The Role of Functional Groups in Carbon Dots' Emission and Sensing Applications

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    Li, Xiang_Final Thesis_Redacted.pdf (4.791Mb)
    Author(s)
    Li, Xiang
    Primary Supervisor
    Nguyen, Nam-Trung
    Other Supervisors
    Li, Qin
    Cole, Ivan
    Year published
    2017
    Metadata
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    Abstract
    As a novel fluorescent material, carbon dots (CDs) demonstrate many excellent properties such as low toxicity, high stability and high resistance to photo bleaching. They are very likely to be applied in sensing, bio-imaging, photo catalysis and lighting devices, which require that the CDs can be tuneable in emission colours. Research to date have pointed to that the functional groups of CDs are very important to the emission of CDs, this MPhil work attempts to make some contributions to the understanding of how the functional groups affect the emission colour and the sensing selectivity. By reviewing many research papers, ...
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    As a novel fluorescent material, carbon dots (CDs) demonstrate many excellent properties such as low toxicity, high stability and high resistance to photo bleaching. They are very likely to be applied in sensing, bio-imaging, photo catalysis and lighting devices, which require that the CDs can be tuneable in emission colours. Research to date have pointed to that the functional groups of CDs are very important to the emission of CDs, this MPhil work attempts to make some contributions to the understanding of how the functional groups affect the emission colour and the sensing selectivity. By reviewing many research papers, it is concluded that instead of size effect, the surface status related to the functional groups, specifically the O, N and S contents of the CDs, becomes the major factor of adjusting the emission colour of CDs. When the O, N or S contents are increased, red-shift of the fluorescence was observed in many studies. Apart from the colour tuning, the role of functional groups in the sensing applications of CDs is even more important. They act as the receptors which could recognise and capture the specific type of analyte, before the subsequent fluorescence quenching caused by aggregation or electron transfer (ET) process.
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    Thesis Type
    Thesis (Masters)
    Degree Program
    Master of Philosophy (MPhil)
    School
    Griffith School of Engineering
    DOI
    https://doi.org/10.25904/1912/411
    Copyright Statement
    The author owns the copyright in this thesis, unless stated otherwise.
    Subject
    Carbon dots
    Fluorescent material
    Sensing applications
    Publication URI
    http://hdl.handle.net/10072/367419
    Collection
    • Theses - Higher Degree by Research

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