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SHUNFU XU1,2,* , WEIHUI LIU3, GUANG YUAN4
- Institute of Architecture and Engineering, Weifang University of Science and Technology Weifang 262700, Chin a
- Institute of Architecture and Engineering, Shandong Vocational College of Science and Technology Weifang 261053, China
- Department of Physics, Shandong University of Science and Technology, Qingdao 266590, China
- Department of Physics, Institute of Information Science and Engineering, Ocean University of China, Qingdao 266100, China
The field emission characteristics of tilted nanomaterials depend notably on their inclination angles. Therefore, in this paper, the significant influence of orientation angles (OAs for short) on field emission characteristics of a capped (5, 5) boron nanotube (BNT) was investigated using density functional theory calculations. Their work functions with different OAs decreased linearly with applied electric fields, and emission currents increased distinctly with external electric fields. There was a small difference among these work functions under lower electric fields. However, distinctions of work functions and emission currents were enlarged while the external fields ranged from -0.1 V/Å to higher value. The emission currents of the (5, 5) BNT under applied electric fields were comparable to that of carbon nanotubes (CNTs) under the same electric fields, and the apex of the (5, 5) BNT were the highest probable positions for electron emission. The tunneling probability of the pristine (5, 5) BNT with OA=0 reached maximum value, so that the BNTs perpendicular to the substrate would achieve the largest emission current..
Boron nanotube, Orientation angle, Field emission, Work function, Emission current, Tunneling probability..
Submitted at: June 6, 2016
Accepted at: Nov. 28, 2017
SHUNFU XU, WEIHUI LIU, GUANG YUAN, Influence of orientation angles on field emission characteristics of boron nanotubes: a theoretical study, Journal of Optoelectronics and Advanced Materials Vol. 19, Iss. 11-12, pp. 758-765 (2017)
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