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

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