Single-crystalline mushroom-like AlN nanorod array has been synthesized. The AlN nanorods, with diameters of 50–200nm and lengths of several micrometers, are distributed uniformly with density of 107–108rods∕cm2. The field emission measurements show that the turn-on field is 8.8V∕μm at a field emission current density (J) of 10μA∕cm2, and the J (10.31mA∕cm2) fluctuation is as small as 2% within an hour. The relationship between the nanostructure and field emission properties is discussed. The low turn-on field and high current stability demonstrate that the mushroom-like AlN nanorod array is a promising field emission material.
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Tang et al. (2005) studied this question.
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