Effects of CdS quantum dot in polymer nanocomposites: In terms of luminescence, optic, and thermal results

Keskin İ. Ç., Türemiş M., Kati M. İ., Kibar R., Çetin A.

Radiation Physics and Chemistry, vol.156, pp.137-143, 2019 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 156
  • Publication Date: 2019
  • Doi Number: 10.1016/j.radphyschem.2018.11.006
  • Journal Name: Radiation Physics and Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.137-143
  • Keywords: Quantum dots, Radloluminescence (RL), Low-Density Polyethylene (LDPE), Optical absorption, Structural characterization, Thermal analysis
  • Manisa Celal Bayar University Affiliated: Yes

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.