Template Deformation-Tailored ZnO Nanorod/Nanowire Arrays: Full Growth Control and Optimization of Field-Emission
Template Deformation-Tailored ZnO Nanorod/Nanowire Arrays: Full Growth Control and Optimization of Field-Emission
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DOI：
10.1002/adfm.200900714
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发表时间：
2009-10-09
影响因子：
19
通讯作者：
Golberg, Dmitri
中科院分区：
文献类型：
--
作者：
Zeng, Haibo;Xu, Xijin;Golberg, Dmitri
在这里，一个简单有效的路线走向完全控制垂直ZnO纳米棒（NR）/纳米线（NW）阵列在厘米级的面积和相当大的改善场发射（FE）性能的报告。通过在玻璃化转变温度附近加热，实现了胶体晶体单层模板的可控变形。NR/NW的密度、均匀性和锥度都通过选择模板尺寸和变形以及电解质组成来调节。根据调整，阵列的场发射性能显着改善。获得了1.8V μ m（-1）的低开启电场，高达5750的场增强因子和高达2.5mA cm（-2）的发射电流密度。这些改进的参数将有利于它们在冷阴极电子学中的潜在应用。
Here, a facile and effective route toward full control of vertical ZnO nanorod (NR)/nanowire (NW) arrays in centimeter-scale areas and considerable improvement of field-emission (FE) performance is reported. Controlled deformation of colloidal crystal monolayer templates is introduced by heating near glass-transition temperature. The NR/NW density, uniformity, and tapering were all adjusted through selection of template size and deformation, and electrolyte composition. In line with the adjustments, the field-emission performance of the arrays is significantly improved. A low turn-on electric field of 1.8 V mu m(-1), a field-enhancement factor of up to 5 750, and an emitting current density of up to 2.5 mA cm(-2) were obtained. These improved parameters would benefit their potential application in cold-cathode-based electronics.