Abstract
The hierarchical AlN comb-like nanostructures self-assembled through a chemical-vapor transport and condensation (CVTC) process were investigated. Field emission (FE) measurements showed that low-threshold FE can be obtained from the synthesized AlN hierarchical nanostructures. Energy dispersive x-ray (EDX) spectroscopy analysis indicated that the synthesized nanostructures were composed of pure Al and N in a molar ratio of 1:0.99. The results show that the intrinsically small value of electron affinity of AlN and the emission from the sharp nanotips and thin edges of the AlN nanoarchitectures contribute to the high emission current.
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