Time and Temperature Dependence of CdS Nanoparticles Grown in a Polystyrene Matrix

Abstract EN

Luminescent CdS nanocrystals embedded in a polystyrene matrix were successfully prepared.

The in situ growth of CdS QDs was realized by thermal treatment of Cd bis(thiolate)/polymer foil at different times and temperatures (240°C and 300°C) of annealing, in order to evaluate their influence on the quantum dots growth process.

As a general trend, the increasing of time and temperature of annealing induces a rise of the CdS nanocrystals size into the polymeric matrix.

The size distribution, morphology, and structure of the CdS nanoparticles were analysed with HRTEM and XRD experiments.

UV-Vis and PL data are strongly size-dependent and were used to investigate the particles' growth process, too.

The CdS nanoparticles behavior in solution indicated a general trend of QDs to aggregation.

This predisposition was clearly displayed by DLS measurements.