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

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.