Structural evolution of graphene quantum dots during thermal decomposition of citric acid and the corresponding photoluminescence
Article
Article Title | Structural evolution of graphene quantum dots during thermal decomposition of citric acid and the corresponding photoluminescence |
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ERA Journal ID | 1412 |
Article Category | Article |
Authors | Wang, Shujun (Author), Chen, Zhi-Gang (Author), Cole, Ivan (Author) and Li, Qin (Author) |
Journal Title | Carbon |
Journal Citation | 82 (C), pp. 304-313 |
Number of Pages | 10 |
Year | 2015 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 0008-6223 |
1873-3891 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.carbon.2014.10.075 |
Abstract | The thermally decomposed citric acid (TDCA) possesses either excitation-dependent or excitation-independent fluorescence as well as different quantum yields with varying synthesis conditions (i.e. temperature and reaction duration). These photoluminescent (PL) properties were found to be mainly determined by the quantitative competition between the graphene quantum dots (GQDs, average size in the range 0.7-1 nm) and the large-inhomogeneously- sized particles. Thermal induced reduction of oxygen containing functionalities leads to an enhancing effect to the PL of GQDs. The study reveals the structural evolution of the GQDs upon thermal treatment and attempts to establish their relationship to the PL property. The GQDs synthesized in this study are excellent sensing materials for trivalent iron cation with both notable selectivity and sensitivity. |
Keywords | average size; enhancing effect; reduction of oxygen; selectivity and sensitivity; sensing material; structural evolution; synthesis conditions; trivalent iron; semiconductor devices and integrated circuits; nanotechnology; chemical reactions; chemical products |
ANZSRC Field of Research 2020 | 401605. Functional materials |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Griffith University |
University of Queensland | |
Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q415z/structural-evolution-of-graphene-quantum-dots-during-thermal-decomposition-of-citric-acid-and-the-corresponding-photoluminescence
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