Structural evolution of graphene quantum dots during thermal decomposition of citric acid and the corresponding photoluminescence

Wang, Shujun, Chen, Zhi-Gang, Cole, Ivan and Li, Qin (2015) Structural evolution of graphene quantum dots during thermal decomposition of citric acid and the corresponding photoluminescence. Carbon, 82 C: 304-313. doi:10.1016/j.carbon.2014.10.075


Author Wang, Shujun
Chen, Zhi-Gang
Cole, Ivan
Li, Qin
Title Structural evolution of graphene quantum dots during thermal decomposition of citric acid and the corresponding photoluminescence
Journal name Carbon   Check publisher's open access policy
ISSN 0008-6223
1873-3891
Publication date 2015-02
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.carbon.2014.10.075
Open Access Status
Volume 82
Issue C
Start page 304
End page 313
Total pages 10
Place of publication Kidlington, Oxford United Kingdom
Publisher Pergamon Press
Collection year 2015
Language eng
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.
Keyword Tunable fluorescence
Carbon nanotubes
Blue
Conversion
Avenue
Light
Size
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online ahead of print 29 Oct 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2015 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 15 times in Thomson Reuters Web of Science Article | Citations
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