Effects of CdS quantum dot in polymer nanocomposites: In terms of luminescence, optic, and thermal results
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Date
2019
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Abstract
CdS quantum dots (QDs) which have unique luminescence efficiency were synthesized by two-phase method using oleic acid (OA) as a surfactant. The nanocomposites have been obtained by blended CdS quantum dots with low-density polyethylene (LDPE) in different ratios. Primarily, radioluminescence (RL) properties were investigated as well as their structural (FT-IR, XRD), morphological (TEM, SEM), thermal (TG-DTA) and absorption (UV–Vis) properties of these nanocomposites. The RL peaks of OA-capped CdS QD were observed at 456 nm and 655 nm. As a consequence of the nanocomposites being doped with powder CdS QD, a significant blue shift was observed in the absorption bands. The optical band gap of CdS was calculated as ̴ 2.3 eV. The nanocomposites blended with CdS QD, this value increased to ̴ 2.7 eV. It has also been observed that nanoparticles cause nanocomposites to have lower melting temperatures. © 2018 Elsevier Ltd
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Keywords
Cadmium sulfide , Energy gap , II-VI semiconductors , Light absorption , Luminescence , Nanocomposites , Nanocrystals , Polyethylenes , Thermoanalysis , nanocomposite , nanocrystal , nanoparticle , oleic acid , polymer , quantum dot , surfactant , CdS quantum dots , Cds quantum dots(QDs) , Low Density Polyethylene (LDPE) , Luminescence efficiencies , Polymer nanocomposite , Radio-luminescence , Structural characterization , Two phase method , absorption , Article , controlled study , Fourier transform infrared spectroscopy , luminescence , melting temperature , optics , scanning electron microscopy , thermal analysis , thermostability , transmission electron microscopy , X ray diffraction , Semiconductor quantum dots