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Improved field emission properties of GaAs/MgO-coated single-walled carbon nanotube

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5 Author(s)
Taehee Park ; Dept. of Chem., Hanyang Univ., Seoul, South Korea ; Jongtaek Lee ; Seungjin Lee ; Hyunjune Park
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We measured the field emission (FE) properties and life time stability of single walled carbon nanotubes (SWNTs) after coating with wide-band-gap material (WBGM) and successive negative electron affinity (NEA) material, i.e., magnesium oxide and successive gallium arsenide. Their turn-on field and emission current densities were measured and compared with pristine SWNT film. The FE was increased successively after MgO coating and subsequent GaAs coating for SWNTs. A lifetime test revealed that GaAs/MgO/SWNTs protects SWNT film during FE under exposure to O2 gas. The field-enhancement factor, β, was calculated from the Fowler-Nordheim equation of FE results.

Published in:

Vacuum Nanoelectronics Conference (IVNC), 2012 25th International

Date of Conference:

9-13 July 2012

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