Affiliation:
1. Department of Electronics and Communication Engineering, Koneru Lakshmaiah Education Foundation, Green Fields, Vaddeswaram-522502, India
Abstract
In present work, the surface modified cadmium sulfide quantum dots (CdS QDs) was synthesized
with chitosan for the detection of silver ions. Chitosan was employed as matrix medium to fabricate
CdS QDs, resulting in the formation of novel QDs/chitosan composite. The CdS quantum dots surface
coated with chitosan were analyzed using UV-vis spectrophotometer, X-ray diffraction and transmission
electron microscope. The chitosan + CdS QDs exhibited high aqueous solubility with better steadiness.
By using chitosan + CdS, the silver ions were not only detected but also reduced to nanosize due to the
reducing property of chitosan. The mechanism of fluorescence quenching of chitosan + CdS by Ag+
was investigated using photoluminescence spectroscopy.
Publisher
Asian Journal of Chemistry