Synthesis, Property Study and Modification of II-VI Sulfide Semiconductor Nanoparticles

Abstract

Surface modification of semiconductor nanopartic1e material would not only improve the stability but also its performance. This study is devoted to new synthetic methods for preparation and modification of hydrophilic semiconductor CdS, CdSe nanoparticles resulting in a novel type of compounds-supramolecules, resembles of metal complexes and nanoparticles. A variety of spectroscopic methods were used to monitor the modification process and to investigate the optical properties of the supramolecules. Based on the consideration of the structure of nanopartic1es, a Lewis acid CuBM was chosen for the modification of S sites on the particle surface. XRD, TEM, UV-Vis, XPS, lH NMR, EPR, photoluminescence and time-resolved fluorescence were used to study the modification, and a structure was proposed based on the spectroscopic results. The modification was found to be light induced and reversible.