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- W4385336387 abstract "Cysteine, as a non-aromatic precursor, was used to produce Nitrogen (N) and Sulfur (S) sources for preparing N, S-doped carbon dots (CDs) with tunable luminescence emission. Despite the tremendous investigations, the photoluminescence (PL) mechanism of CDs is still unclear due to its complex core-shell structure, variety of surface functional groups, and structure dependency. This study focuses on controlling aromatization and graphitization processes during the hydrothermal synthesis on CDs by using Citric Acid (CA) and Ammonium persulfate. Detailed characterizations by FTIR spectroscopy, XPS, and HR-TEM are provided to suggest both chemical and bandgap structures. Results reveal that the red-shift of PL occurred due to the graphitization and increasing content of graphitic nitrogen in the core, as well as the Pyridinic and Amine groups creating sub-bands on the surface. These findings resolve the controversy on the PL mechanism of Cysteine-based CDs and provide a general guide for increasing the aromatization and graphitization degree from non-aromatic precursors which clarify the mechanism exploration and structural analysis of other types of CDs." @default.
- W4385336387 created "2023-07-29" @default.
- W4385336387 creator A5003480397 @default.
- W4385336387 creator A5030572853 @default.
- W4385336387 creator A5083724249 @default.
- W4385336387 date "2023-12-01" @default.
- W4385336387 modified "2023-10-14" @default.
- W4385336387 title "Bandgap tailoring and enhancing the aromatization in cysteine-based carbon dots" @default.
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- W4385336387 doi "https://doi.org/10.1016/j.jcis.2023.07.157" @default.
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