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Synthesis of carbon‐based quantum dots from starch extracts: Optical investigations
Author(s) -
AlDouri Y.,
Badi N.,
Voon C. H.
Publication year - 2018
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3408
Subject(s) - carbonization , quantum dot , materials science , luminescence , starch , carbon fibers , aqueous solution , refractive index , dielectric , phosphoric acid , nanotechnology , chemical engineering , optoelectronics , chemistry , organic chemistry , scanning electron microscope , composite number , engineering , metallurgy , composite material
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.