Controlled nucleation and growth of CdS nanoparticles in a polymer matrix

TL;DR

This study investigates the controlled formation of CdS nanoparticles within a polymer matrix using in-situ synchrotron X-ray diffraction, revealing how temperature influences nanoparticle size, structure, and optical properties.

Contribution

It introduces a method for controlling CdS nanoparticle nucleation and growth in polymers through temperature regulation during synthesis.

Findings

Nanoparticles form via thermolysis of precursors between 200-300°C.

Complete precursor decomposition occurs above 240°C.

Nanoparticle size and structure depend on annealing temperature.

Abstract

The nucleation and growth of CdS nanoparticles within a polymer matrix was followed by in-situ synchrotron X-ray diffraction. The nanoparticles form by effect of the thermolysis of thiolate precursors at temperatures between 200 and 300 Celsius degrees. Above 240 Celsius degrees the precursor decomposition is complete and CdS nanoparticles grow in the polymer matrix forming a nanocomposite with interesting optical properties. The nanoparticle structural properties (size and crystal structure) depend on the annealing temperature.(abridged version)