Abstract
ZnO-based elements have attracted many attentions as gas sensor because of their chemical sensitivity to volatile and other radical gases. Considering the application of ZnO film in optoelectronic nanodevices, fabrication ZnO nanoarrays on a large substrate surface by low-temperature and low cost process are of prime importance in future applications. In the present study, a catalyst-free, novel technique was addressed to fabricate ZnO nanoarrays film without any high temperature treatment by the electrodeless chemical deposition at below 100 oC. The in situ forced hydrolysis of low-solubility zinc salts to ZnO crystal at the initial stage promoted growth of ZnO nanoarrays by heterogeneous nucleation. The formation mechanism of 1D ZnO nanoarrays and forced hydrolysis of a zinc salts template layer were investigated in a wide range of temperatures and concentrations.
