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SEM image of carbon cloth.
SEM micrographs of ZnO nanowires grown on carbon cloth in low (a), medium (b), and high (c) magnifications.
The measured field emission current density of ZnO nanowires grown on carbon cloth as a function of the macroscopic electric field. The electric field required to obtain is . The inset shows the turn-on electric field of for a current density of .
The Fowler–Nordheim plot of the field emission current density of ZnO nanowires grown on carbon cloth.
The electric field required to obtain emission current density of , the field enhancement factor, and the assumed work function for various ZnO nanowires in the literature.
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