Stable field emission from hydrothermally grown ZnO nanotubes

作者：Ang Wei, Xiao Wei Sun, C. X. Xu, Zhili Dong, M. B. Yu, Wei Huang · 发表于：Applied Physics Letters · 年份：2006 · DOI：10.1063/1.2206249 · 被引用次数：208 · 研究领域：ZnO doping and properties、Nanowire Synthesis and Applications、Gas Sensing Nanomaterials and Sensors

Zinc oxide nanotube arrays were prepared by hydrothermal reaction in ammonia and zinc chloride solutions, and the field emission properties were tested. The turn-on field of the field emission was extrapolated to be about 7.0V∕μm at a current density of 0.1μA∕cm2. Meanwhile, the emission current densities reached 1mA∕cm2 at a bias field of 17.8V∕μm. The field enhancement factor β was estimated to be 910. The field emission of the zinc oxide nanotubes showed good stability. The variation of emission current density was less than 10% during a 24h test under a field of 15V∕μm.