Open AccessStructural stability and field emission propertiesof cone-capped carbon nanotubes
Author(s) -
Yijun Wang,
Liuding Wang,
Min Yang,
Yan Cheng,
Xiaodong Wang,
Caiping Xi,
Li Zhao-Ning
Publication year - 2011
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.60.077303
Subject(s) - field electron emission , carbon nanotube , materials science , cone (formal languages) , ridge , field (mathematics) , carbon fibers , molecular physics , nanotechnology , condensed matter physics , composite material , physics , quantum mechanics , electron , paleontology , mathematics , algorithm , composite number , computer science , pure mathematics , biology
The structural stability and the electronic field emission properties of cone-capped carbon nanotubes have been deeply analyzed by the density functional theory. The results show that their structurs are much more stable than those of carbon nanocones and carbon nanotubes sealed with a C30 hemisphere, and their electronic field emission properties are closely related to the configuration of cone apex and the magnitude of cone angle. Meanwhile, the combination property of cone1@(6,6) with a ridge-shaped tip and 38.9° cone angle is optimal. When it is used as a field emission source the field emission current density and the lifetime of device will be remarkably increased.