Synthesis of single crystalline CdS nanowires with
polyethylene glycol 400 as inducing template
polyethylene glycol 400 as inducing template
(Nanomaterials Research Institute, College of Materials Science and Technology,
Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
Abstract: Solvothermal technique, an one-step soft solution-processing route was successfully employed to synthesize single crystalline CdS nanowires in ethylenediamine medium at lower temperature (170 ℃) for 1－8 d. In this route, polyethylene glycol 400 (PEG400) was used as surfactant, which played a crucial role in preferentially oriented growth of semiconductor nanowires. Characterizations of as-prepared CdS nanowires by X-ray powder diffraction(XRD), transmission electron microscopy(TEM) indicate that the naonowires, with typical diameters of 20nm and lengths up to several micrometers, have preferential [001] orientation. Also, investigations into the physical properties of the CdS nanowires were conducted with UV-Vis absorption spectroscopy and photoluminescence emission spectroscopy. The excitonic photo-optical phenomena of the nanowires shows the potential in the practical applications.
Key words: Ⅱ-Ⅵsemiconductor; cadmium sulfide; nanowires; single crystal; photoluminescence properties