| Autor: |
Chen, Jun, Deng, S. Z., Xu, N. S., Zhang, Weixin, Wen, Xiaogang, Yang, Shihe |
| Předmět: |
|
| Zdroj: |
Applied Physics Letters; 7/28/2003, Vol. 83 Issue 4, p746, 3p, 2 Diagrams, 2 Graphs |
| Abstrakt: |
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 µA/cm⊃2 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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
