Abstract
Oriented bicrystalline GaN nanowire arrays are synthesized by a catalytic carbon thermal reduction process. The bicrystalline structure is composed of (001) planes and the twin angle is 124°. Field‐emission measurements show that the oriented bicrystalline GaN nanowire arrays produce a current density of 10 μA/cm2 at a lower turn‐on fields of 8 V/μm. It suggests that the oriented bicrystalline GaN nanowire capped with catalyst particle arrays can serve as a promising candidate for field emission emitters.
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