Abstract:

Highly ordered CdS nanorods and network nanowires were prapared by reacting cadmium ions with thioacetamide (TAA) using bovine serumalbumin (BSA) as a biomineralization template with a facile and environmentally benign biomineralization method. The morphology, elemental composition, optical property, and microelectronic transmission behavior of the samples synthesized at different reaction temperatures were characterized by means of transmission electron microscope (TEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), photoluminescence (PL) emission spectroscopy, and conductivity-atomic force microscopy (C-AFM). Results showed that when the experimental temperature was 20 ℃, monodispersed CdS nanorods with sizes of about 30 nm in diameter and 250 nm in length were obtained; and at 50 ℃, a network of CdS nanowires of about 2-3 μm in length were fabricated. CdS nanorods and nanowires showed a cubic zinc blended structure. Characterization of their fluorescence property showed that CdS nanorods and nanowires had excellent fluorescence. Moreover, characterization of their current-voltage (I-V) characteristics showed that CdS nanowires had good conductivity.

Key words: Nanorods, Cadmiumsulfide, Network nanowires, Bovine serumalbumin, Fluorescence, Current-voltage characteristics