A chemical solution transport mechanism for one-dimensional growth of CdS nanowires

Abstract CdS nanowires have been synthesized by the thermal treatment of Cd 2+ -dispersed polyacrylamide (PAA) with ethylenediamine solution of thiourea in a sealed system at 170°C for 4 days. A chemical solution transport (CST) growth has been proposed for the formation of CdS nanowires from the solution phase. In the growth process, PAA layers overcoat the nanowires, which serve to terminate the growth in the lateral direction. Consequently, continuous single-crystalline nanowires with great aspect ratios and smooth morphology were obtained.