Films of aligned cupric oxide nanobelts have been prepared in an aqueous solution at room temperature. Field-emission characteristics, including emission-current–applied-field plot and emission site distribution, have been studied using the transparent anode technique. In addition, the temperature dependence of the field-emission characteristics has been studied from room temperature to 750 K. The threshold field for obtaining a current density of 10 is ∼11 MV/m. This decreases with increasing temperature, and at 700 K it is ∼6 MV/m. At a fixed field of 10 MV/m, about a three-orders-of-magnitude increase of the emission current level has been observed. The results show that the cupric oxide nanobelt is a promising candidate for cathode material in a thermoelectric conversion device based on field emission.
Temperature dependence of field emission from cupric oxide nanobelt films
Jun Chen, S. Z. Deng, N. S. Xu, Weixin Zhang, Xiaogang Wen, Shihe Yang; Temperature dependence of field emission from cupric oxide nanobelt films. Appl. Phys. Lett. 28 July 2003; 83 (4): 746–748. https://doi.org/10.1063/1.1595156
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