Controlled growth and field emission properties of zinc oxide nanopyramid arrays |
| |
Authors: | Hongsheng Chen Yue Zhang Xiaomei Zhang Yunhua Huang |
| |
Institution: | a Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, PR China b State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, PR China |
| |
Abstract: | Single-crystalline, pyramidal zinc oxide nanorods have been synthesized in a large quantity on p-Si substrate via catalyst-free thermal chemical vapor deposition at low temperature. SEM investigations showed that the nanorods were vertically aligned on the substrate, with diameters ranging from 60 to 80 nm and lengths about 1.5 μm. A self-catalysis VLS growth mechanism was proposed for the formation of the ZnO nanorods. The field emission properties of the ZnO nanopyramid arrays were investigated. A turn-on field about 3.8 V/μm was obtained at a current density of 10 μA/cm2, and the field emission data was analyzed by applying the Fowler-Nordheim theory. The stability of emission current density under a high voltage was also tested, indicating that the ZnO nanostructures are promising for an application such as field emission sources. |
| |
Keywords: | 79 70 +q 81 05 Dz 81 07 Bc 81 15 Gh 85 45 Db |
本文献已被 ScienceDirect 等数据库收录! |
|