Junan Wang

Colour electroluminescence with end light-emitting from ZnO nanowire/polymer film

The ZnO nanowires with polymer film were self-assembly grown on n-type (111) plane of the silicon substrate using polymer assisted complexing soft-template process through a simple polymer complexation and low-temperature oxidizing-sintering, which have smooth top and fine hexagonal columnar structure with average length of about 6 μm and the diameter of about 40 nm. These columnar structured ZnO nanowires had strong near-band ultraviolet emission at ~383 nm and blue electrically driven emission at ~ 400 nm with a relatively low turn-on voltage, as well as a typical diode characteristic property at room temperature. In particular, these structures, being of high aspect ratio and small tip radius of curvature, may possess a good amplified stimulated emission and lasing property. These results suggested a potential application of ZnO nanowire/polymer film as electroluminescence flat panel displays or illuminations in the future.

Polymer-assisted self-assembling orientation growth of ZnO nanorods

The growth of ZnO nanorods based on an ion complex transformation method and a polymer carbonized grid backbone localization nanowire growth mechanism was introduced in this paper. We reported a preparation of the self-assembling [0001] oriented zinc oxide nanorods grown on Si substrates by using polymer as complex medium. A polymer solution containing ligands Zn/sup 2+/ via complexing the homogenous polar radicals in polymers with Zn/sup 2+/ ions in semiconductor metal salts was distributed evenly on Si substrates by coating. Then Zn/sup 2+/ transforms into ZnO quantum nanospots by oxidization. All the polymers were removed after chemical oxidization and only the carbon grid backbones remained that confine the ZnO nanorods diameter. The ZnO nanorods have been characterized by FE-SEM, XRD and EDX. The diameter of ZnO semiconductor nanorods varies from 20 to 90 /spl mu/m and the length up to 5 /spl mu/m. The possible growth mechanism for ZnO nanorods on Si (111) substrates has been discussed as well.