Cd(NH2CSNHNHCSNH2)Cl2:: a new single-source precursor for the preparation of CdS nanoparticles

The complex of cadmium with dithiobiurea, [Cd(NH2CSNHNHCSNH2)Cl-2], has been used as a precursor for the synthesis of US nanoparticles. The precursor was decomposed in tri-n-octylphosphine oxide to give US nanoparticles that show quantum confinement effects with characteristic close to band edge luminescence. The broad diffraction in the XRD pattern and diffused diffraction rings of the SAED pattern are typical of nanometer-sized particles. The particle morphology was found to depend on the temperature of injection of the precursor. Transmission electron microscopy shows irregular non-spherical particles prepared by injection at 150 degreesC, whilst with injection at 240 degreesC the particles are formed as spherical aggregates of relatively uniform size (50 nm). (C) 2003 Published by Elsevier Ltd.