Growth mechanism and charge transport properties of hybrid Au/ZnO nanoprisms

摘要: Abstract Hybrid Au/ZnO nanoprisms with different Zn:Au atomic ratios are synthesized by a facile co–precipitation method followed calcination process in which highly monodispersed Au nanocrystals were grown on the tips of ZnO prismatic nanocrystals. It is found that growth mechanism hindering {01 1 ¯ 0} planes during thermal decomposition leading to crystal growth. X-ray diffraction reveals hybrid nanoprism formation presence Au, decrease ratio results higher amount being incorporated into lattice structure. This increase leads an crystallographic defects such as density dislocations and dislocation cut-off length. Optical absorption measurements show decreasing from 315:1 79:1, bandgap structures reduces 2.77 eV 2.27 eV. Photoluminescence spectroscopy emission surface dominant emission. Besides, increasing ratio, luminescence spectra quenched due increased density. The electron/hole pair recombination time diversion responsible for enhancement photocatalytic activity. Finally, charge transport proposed using photoluminescence photoelectron results.