钼纳米颗粒修饰的氧化锌纳米棒阵列的场发射特性
Field Emission Properties of Molybdenum Nanoparticles Decorated ZnO Nanorod Arrays.
作者信息
Cao Pei-Jiang, Yang Zhi-Bo, Rao Ch N, Han Shun, Xu Wang-Ying, Fang Ming, Liu Xin-Ke, Jia Fang, Zeng Yu-Xiang, Liu Wen-Jun, Zhu De-Liang, Lu You-Ming
机构信息
Shenzhen Key Laboratory of Special Functional Materials, Shenzhen Engineering Laboratory for Advanced Technology of Ceramics, Guangdong Research Center for Interfacial Engineering of Functional Materials, and College of Materials Science and Engineering, Shenzhen University, Shenzhen 518055, China.
出版信息
J Nanosci Nanotechnol. 2019 Dec 1;19(12):8135-8142. doi: 10.1166/jnn.2019.16871.
Precisely controlled dimensions of heterostructured ZnO nanorod arrays were grown on micropatterned Au films supported by Si substrate using chemical vapor deposition (CVD). The field emission properties were attributed to pointed nanorods, thickness of catalyst, preferential growth, density, morphology of ZnO and Molybdenum (Mo) decorated ZnO nanorod arrays (Mo/ZnO). The selective restrained heterostructure approach resulted in excellent control over periodicity, location and density of ZnO nanorod arrays. Overall, field emission properties of bare ZnO nanorod arrays showed a low turn-on field of ~4.7 V/m and a high field enhancement factor () ~1686 to 7.3 V/m and () ~807 for Mo/ZnO. It was also found that the field emission properties were significantly influenced by densely decorated Mo nanoparticles on as-grown ZnO nanorod arrays.
利用化学气相沉积（CVD）法，在硅基支撑的微图案化金膜上生长出尺寸精确可控的异质结构氧化锌纳米棒阵列。场发射特性归因于尖锐的纳米棒、催化剂厚度、择优生长、氧化锌及钼修饰的氧化锌纳米棒阵列（Mo/ZnO）的密度和形态。选择性受限异质结构方法实现了对氧化锌纳米棒阵列的周期性、位置和密度的出色控制。总体而言，裸氧化锌纳米棒阵列的场发射特性显示，开启场低至约4.7 V/μm，场增强因子（β）约为1686；对于Mo/ZnO，开启场为7.3 V/μm，场增强因子（β）约为807。还发现，生长的氧化锌纳米棒阵列上密集修饰的钼纳米颗粒对场发射特性有显著影响。
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