Anomalous temperature dependence of field emission from W18O49 nanowires caused by surface states and field penetration

作者：Chen W Q; Zhan R Z; Deng S Z; Xu N S; Chen Jun^*

来源：Journal of Applied Physics, 2014, 116(13): 133506.

DOI：10.1063/1.4896901

In this paper, we studied how field emission from thermally evaporated W18O49 nanowires depended on temperature. As the temperature changed from 300K to 723 K, we found anomalous changes in emission current. Below an applied field of similar to 12.5V mu m(-1), the emission current tended to increase with rising temperature, while above 12.5V mu m(-1) the current depended less on temperature in the range of 573-723 K. Furthermore, at high temperatures, we found the Fowler-Nordheim plots of these nanowires to be nonlinear. We believe that the anomalous behavior is associated with surface states at low fields and field penetration at high fields.

• 单位
  中山大学