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

Wang, Shujun and Chen, Zhi-Gang and 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). pp. 304-313. ISSN 0008-6223

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.


Statistics for USQ ePrint 31687
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty / Department / School: No Faculty
Date Deposited: 14 Jun 2017 04:19
Last Modified: 27 Jun 2017 06:31
Uncontrolled 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
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Identification Number or DOI: 10.1016/j.carbon.2014.10.075
URI: http://eprints.usq.edu.au/id/eprint/31687

Actions (login required)

View Item Archive Repository Staff Only