Affiliations 

  • 1 Nanotechnology and Catalysis Research Center (NANOCAT), University of Malaya, Kuala Lumpur, Malaysia
  • 2 Department of Physics, Renewable Energy Laboratory, University of Tabuk, Tabuk, KSA
  • 3 Institute of Nano Electronic Engineering, University Malaysia Perlis, Kangar, Perlis, Malaysia
Luminescence, 2018 Mar;33(2):260-266.
PMID: 29024360 DOI: 10.1002/bio.3408

Abstract

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.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.