Abstract
In order to improve the field emission properties of screen-printed carbon nanotube films, ZnO nanostructures were deposited on multiwall carbon nanotubes (MWNTs) using vapor phase transport method. Based on the combined effect of geometrical structure of MWNT/ZnO, a low turn-on field of ∼0.7V∕μm at current density of 0.1μA∕cm2, a low threshold field of ∼2.3V∕μm at current density of 1mA∕cm2, a high field enhancement factor of 8.2×103, and a homogeneous emission image with emission spot density of ∼105cm−2 were obtained from ZnO nanomultipods grown on MNWT film.
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