Synthesis of carbon-based quantum dots from starch extracts: Optical investigations

Al-Douri, Yarub and Badi, Nacer and Voon, Chun Hong (2017) Synthesis of carbon-based quantum dots from starch extracts: Optical investigations. Luminescence, 33 (2). pp. 260-266. ISSN 1522-7235, DOI

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Carbon-based quantum dots (C-QDs) were synthesized through microwave-assisted carbonization of an aqueous starch suspension mediated by sulphuric and phosphoric acids. The as-prepared C-QDs showed blue, green and yellow luminescence without the addition of any surface-passivating agent. The C-QDs were further analyzed by UV−vis spectroscopy to measure the optical response of the organic compound. The energy gaps revealed narrow sizing of C-QDs in the semiconductor range. The optical refractive index and dielectric constant were investigated. The C-QDs size distribution was characterized. The results suggested an easy route to the large scale production of C-QDs materials.

Item Type: Article
Uncontrolled Keywords: carbon quantum dots; optical properties; starch
Subjects: Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 26 Sep 2019 04:39
Last Modified: 26 Sep 2019 04:39

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