Abstract: High-quality tetrapodlike ZnO nanostructures (T-ZnO) were synthesized by a vapor transport method, in which
ZnO nanocrystals were used as homogeneous catalyst and a vapor filter was placed between the source and the substrate. The microstructure of T-ZnO
and the effects of the filter and ZnO nanocrystals on the constitute and morphology of the products were investigated. Results show that T-ZnO is
uniform and evenly distributing, constituted by four pillarlike nanorods and a spheral core. All components are wurtzite structure. The diameter of
nanorods is 60nm, growing along <0001> direction. The use of filter leads to the effective remove of the particles in the products. ZnO
nanocrystals are beneficial to reduce the size and improve the uniformity of the product.

Key words: tetrapodlike ZnO nanostructure, homogenous catalyst, influence factors