Synthesis of orderly nanostructure of crystalline GaN nanoparticles on anodic porous alumina membrane

Synthesis of an orderly nanostructure of crystalline GaN nanoparticles on anodic porous alumina membrane through a gas reaction of Ga2O vapor with a constant ammonia atmosphere at 900 degrees C was achieved. The investigation using atomic force microscopy, x-ray diffraction, transmission electron microscopy and high resolution electron microscopy indicated that the orderly nanostructure consisted of polycrystalline GaN nanoparticles with a hexagonal wurtzite structure and about 10-20 nm in diameter. The growth mechanism of the orderly nanostructure of the GaN nanoparticles was discussed. The photoluminescence spectrum of the orderly nanostructure was also reported. (C) 1999 Acta Metallurgica Inc.