Open AccessCalculation of the enhancement factor for the individual conductive nanowire in field emission
Author(s) -
Xinqing Wang,
Miao Wang,
Zhenhua Li,
Bing Yang,
Wang Feng-Fei,
He Pi-Mo,
Yanqiao Xu
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.1347
Subject(s) - nanowire , anode , cathode , common emitter , radius , field electron emission , materials science , electric field , field (mathematics) , optoelectronics , electron , electrode , physics , electrical engineering , mathematics , computer security , quantum mechanics , computer science , pure mathematics , engineering
The potential and the electric field at the end of the individual nanowire under an electric field were calculated with the image charge model. With the nanowire as a field emitter, the enhancement factor was given by the expression: βh/ρ+35. Taking into account the influence of the anode_cathode distance, the enhancement factor at the end of the nanowire could be adjusted based on the equation: β=h/ρ+35+A(h/d)3, where h and ρ are the length and the radius of the nanowire respectively; d is the anode_cathode distance and A is a constant. From the above results, it is concluded that the aspect ratio is the most important factor for the nanowire emitter and the anode_cathode distance also slightly influence the enhancement factor of the nanowire in field emission, and the enhancement factor increases with the decrease of the anode_cathode distance.