Aligned AlN Nanorods with Multi-tipped Surfaces—Growth, Field-Emission, and Cathodoluminescence Properties


  • The research was supported by NSF, DARPA, NASA, and NSC, Taiwan. The authors thank Dr. Yong Ding for his kind help in the EELS experiments.


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Well-aligned aluminum nitride nanorods with hairy surfaces (see Figure) are a new hierarchical nanostructure with promising field-emission properties. The columnar nanostructures are produced by a vapor–solid process. Their cathodoluminescence spectrum reveals an intense emission peak with a low turn-on field of 3.8 V μm–1, suggesting potential applications in optoelectronic nanodevices.