材料期刊网

Single-crystalline mushroom-like AlN nanorod array has been synthesized. The AlN nanorods, with diameters of 50-200 nm and lengths of several micrometers, are distributed uniformly with density of 10(7)-10(8) rods/cm(2). The field emission measurements show that the turn-on field is 8.8 V/mu m at a field emission current density (J) of 10 mu A/cm(2), and the J (10.31 mA/cm(2)) fluctuation is as small as 2% within an hour. The relationship between the nanostructure and field emission properties is discussed. The low tum-on field and high current stability demonstrate that the mushroom-like AlN nanorod array is a promising field emission material. (C) 2005 American Institute of Physics.