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采用电化学沉积法在阴离子表面活性剂十二烷基苯磺酸钠(SDBS)的作用下生长纳米枝状氧化锌(ZnO),通过扫描电子显微镜(SEM)、X射线衍射(XRD)和场发射测试,系统研究了不同沉积时间下纳米枝状ZnO的形貌、结构与场发射性能.研究结果表明:由于表面活性剂中阴离子的位阻效应,导致在ZnO主干上电化学生长了多个ZnO的分枝,并且纳米枝状ZnO的场发射性能随着沉积时间的增加出现先升高后降低的趋势.其场发射性能的提高主要取决于ZnO主干上分枝的形貌和密度,在沉积时间为90 min时,每支ZnO的主干上分别生长了约2~10个分枝,获得最佳的纳米枝状ZnO场发射性能,开启场强低至1.54 V/μm,场增强因子高达59 739.
Electrodeposition was used to grow nanodendritic zinc oxide (ZnO) under the action of anionic surfactant sodium dodecylbenzenesulfonate (SDBS). Scanning electron microscopy (SEM), X-ray diffraction (XRD) Emission test.The morphology, structure and field emission properties of ZnO nanocomposites were investigated systematically.The results show that due to the steric hindrance of the anions in the surfactant, a large number of electrochemically grown ZnO nanorods ZnO, and the field emission properties of nano-dendritic ZnO first increased and then decreased with the increase of deposition time.The improvement of field emission properties mainly depended on the morphology and density of branches on the ZnO host, When the deposition time was 90 min, about 2 ~ 10 branches were grown on the main stem of each ZnO. The best ZnO nanowire ZnO field emission performance was obtained. The field strength was as low as 1.54 V / μm and the field enhancement factor was up to 59 739.