Study on the Electron Emission Properties of ZnO Nanorod Arrays on Different Substrates

Authors: Liao, Qingliang; Huang, Yunhua; Qin, Zi; Zhang, Zheng; Qi, Junjie; Zhang, Yue; Xia, Liansheng

Source: Journal of Nanoscience and Nanotechnology, Volume 12, Number 1, January 2012 , pp. 775-780(6)

Publisher: American Scientific Publishers

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Abstract:

Large area well-aligned ZnO nanorod arrays on different substrates were synthesized by hydrothermal methods. The electron emission properties of the ZnO nanorod arrays on different substrates were investigated under both direct current (DC) and pulse electric fields. Owing to the excellent conductivity of substrates, the array on stainless steel substrate had better electron emission properties than that on silicon substrate. Under the DC and pulse electric fields, the electron emission of arrays had different production mechanisms which were pure field emission and plasma-induced emission respectively. During the plasma-induced emission, the plasma formed on the array surface, and the maximum emission current density of arrays on stainless steel was 118.87 A/cm2. The plasma-induced emission of ZnO nanorod arrays were always distributed uniformly. In this work, the results show that the ZnO nanorod arrays are expected to be applied to different electronic devices as electron beam sources under different electric fields.

Keywords: CONTACT RESISTANCE; DC AND PULSE ELECTRIC FIELDS; EMISSION MECHANISM; FIELD EMISSION; ZNO NANOROD ARRAYS

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2012.5340

Publication date: January 1, 2012

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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