Qiang Gao, Shuang-lin Hu, Bin Li. First-principles Study of Field Emissions from Natrium-Encapsulated Boron-Nitride Nanotube in a Perpendicular Geometry[J]. Chinese Journal of Chemical Physics , 2010, 23(5): 553-557. doi: 10.1088/1674-0068/23/05/553-557
Citation: Qiang Gao, Shuang-lin Hu, Bin Li. First-principles Study of Field Emissions from Natrium-Encapsulated Boron-Nitride Nanotube in a Perpendicular Geometry[J]. Chinese Journal of Chemical Physics , 2010, 23(5): 553-557. doi: 10.1088/1674-0068/23/05/553-557

First-principles Study of Field Emissions from Natrium-Encapsulated Boron-Nitride Nanotube in a Perpendicular Geometry

doi: 10.1088/1674-0068/23/05/553-557
Funds:  This work was supported by the National Natu-ral Science Foundation of China (No.90921013 and No.10704069).
  • Received Date: 2010-04-30
  • The field emission from pure boron-nitride nanotube and boron-nitride nanotube encapsu-lated with natrium atoms with the electric field perpendicular to the axis of nanotubes is simulated based on a self-consistent method using the density-functional formalism. It has been found that the nearly-free-electron states in boron-nitride nanotube would perform very well in field emissions after natrium atom encapsulation. The characters of total en-ergy distribution curves are analyzed to seek the function of nearly-free-electron states in the field emission, with special attention to response of the emission current to the external electric field. At last, the perpendicular emission geometry is found to possess a very sensi-tive response degree which is supposed to be related to specific expansion orientation of the nearly-free-electron states in this system.

     

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