Growth and Characteristics of ZnO Needles in the Surface of “Platanus Occidentalis” Made of Al2O3, Au and ZnO.

Complex ZnO compound material has great potential applications for optoelectronic devices. In this article, we give report to a simulation growth of a kind of special“fruiting ball”——natural “Platanus Occidentalis” made of Al2O3, Au and ZnO. The surface of “Platanus Occidentalis ” has numerous tiny Au seeds on the surface of Al2O3 ball. ZnO needles synthesized by the electrodeposition technique grow well on the Au seed layer. The obtained mono dispersive needles (or hexagonal columns) have different distribution density. The prepared sample looks like the assembled “Platanus Occidentalis” in photographs of scanning electron microscopy (SEM). Photoluminescence (PL) of samples at 6 K temperature and other characteristics are investigated. The appearance of sharp bound exciton (BE) emission line and the longitudinal optical (LO)-phonon replicas imply that the ZnO nanocolumns are of high optical quality.