ZnO nanoneedles fabricated by a simple approach and their optical properties

来源期刊：中国有色金属学报(英文版)2004年第5期

论文作者：路庆凤 魏红祥 胡柱东

文章页码：973 - 976

Key words：ZnO nanoneedles; photoluminescence spectrum; optical properties

Abstract: Spoke-like ZnO nanoneedles have been successfully synthesized at the ambient pressure through thermally oxidizing Zn powders containing Au nanoparticles. X-ray diffraction analysis indicates that the ZnO nanoneedles have a hexagonal wurtzite structure of the crystalline ZnO. The morphology of the products was examined by FE-SEM. The photoluminescence(PL) spectrum under 325 nm exhibits both an UV emission and a green emission. It is interesting to note that the heating rate plays a key role in the synthesis of ZnO nanoneedles. Based on this discovery we propose to explain the special growth behavior as novel mechanism that a large temperature gradient and Au nanoparticles simultaneously result in the spoke-like ZnO nanoneedles growth.