On the Growth of CdS Nanowires by the Evaporation of CdS Nanopowders

This article describes for the first time the direct observation of the nucleation and growth process of CdS nanowires in a typical vapor-solid synthetic route. Thermal evaporating of CdS nanosized powders at 1173 K for various time durations corresponds to different growth stages and leads to varied product morphologies. Initially, CdS appeared as amorphous spherical particles, followed by nucleation of nanorods from cusps on the particle surface. Subsequently, nanorods developed to nanowires with matrix particles being consumed. Strategies could be optimized to grow CdS nanowires of varied diameters and lengths for a variety of applications. 1.