标题：Field emission characteristics of pristine and lithium-doped boron nanotubes: A theoretical study
作者：Xu, Shunfu ;Liu, Weihui ;Zhu, Ziliang ;Meng, Yan ;Wang, Jiesheng ;Li, Chun ;Yuan, Guang
作者机构：[Xu, Shunfu ;Zhu, Ziliang ;Meng, Yan ] Institute of Architecture and Engineering, Weifang University of Science and Technology, Weifang; 262700, China 更多
来源：Journal of Vacuum Science and Technology B: Nanotechnology and Microelectronics
摘要：First-principles calculations are used in order to investigate the electronic and field emission properties of capped (5, 5) and (9, 0) boron nanotubes (BNTs), which indicate that the electric currents of the (5, 5) and (9, 0) BNTs under an applied electric field are very close to those of carbon nanotubes, and pentagons and hexagons on the tips of the BNTs are the most possible spots for emitting tunneling electrons under an external electric field. In addition, the work functions of the (5, 5) and (9, 0) BNTs decrease linearly with applied electric fields. The significant influence of lithium adsorption on field emission characteristics of BNTs is also studied. The work functions of BNTs decrease distinctly after lithium adsorption, while the emission currents increase by a large margin. Moreover, the lithium adsorption can improve the electric conductivity of a mixture of BNTs.
© 2015 American Vacuum Society.