Evolution mechanism of CdS/L-cystein nanoparticles.

Abstract

The study and optimization of the parameters of the synthesis of nanostructures with given properties, which are stable under the operating conditions of devices based on them, and the creation of a new class of instruments for electronics, medicine, and biology have been topical areas of research for more than a dozen years. The size, structure, and, accordingly, the optical properties of nanoparticles (NPs) can be regulated by the conditions of synthesis, the nature of the connection between the semiconductor core and the stabilizing shell of the NPs, and change over time. The aim of the study.Is to study the mechanism of evolution of CdS/L-Суs nanoparticles in the process of growth and maturation from colloidal solutions of the composition Cd2+- S2-- L-Cys. Materials and methods. High-quality starting reagents were used for the experiments, namely: 0.5 M solution of CdCl2·2.5H2O, 0.05M solution of L-Cysteine, 0.5 M solution of Na2S·9H2O, 0.1 M solution of NaOH. A series of syntheses of CdS/L-Cys NPs was carried out at fixed pH values of 7, 9, and 11.