Growth of Nb-catalysed GaN nanowires

GaN nanowires have been successfully synthesized on Si(111) substrate by ammoniating Ga"2O"3 films at 950^oC. The structure and morphology of GaN nanowires are characterized by X-ray diffraction, scanning electron microscopy, field-emission transmission electron microscope and X-ray photoelectron spectroscopy. The results show that the synthesized nanowires are single-crystal hexagonal wurtzite GaN with diameters ranging from 50 to 100nm and lengths up to several microns. Finally, the growth mechanism of GaN nanowires is explored.

[1]  Takashi Sugino,et al.  Fabrication and characterization of metal/GaN contacts , 2000 .

[2]  V. V. Mamutin.  Growth of A3N whiskers and plate-shaped crystals by molecular-beam epitaxy with the participation of the liquid phase , 1999 .

[3]  Xiangfeng Duan,et al.  Laser-Assisted Catalytic Growth of Single Crystal GaN Nanowires , 2000 .

[4]  S. Pal.  Microwave plasma oxidation of gallium nitride , 2003 .

[5]  Haibo Sun,et al.  Fabrication of GaN nanowires by ammoniating Ga2O3/Al2O3 thin films deposited on Si(111) with radio frequency magnetron sputtering , 2004 .

[6]  Lili Sun,et al.  Synthesis of GaN nanowires through Ga2O3 films' reaction with ammonia , 2007 .

[7]  M. Reed,et al.  Current rectification in a single GaN nanowire with a well-defined p–n junction , 2003 .

[8]  Lili Sun,et al.  Fabrication and photoluminescence of GaN nanowires prepared by ammoniating Ga2O3/BN films on Si substrate , 2006 .

[9]  S. Major,et al.  Sputter deposition of gallium nitride films using a GaAs target , 1998 .

[10]  S. Noor Mohammad,et al.  Growth of GaN nanowires by direct reaction of Ga with NH3 , 2001 .

[11]  Perlin,et al.  Raman scattering and x-ray-absorption spectroscopy in gallium nitride under high pressure. , 1992, Physical review. B, Condensed matter.

[12]  Stephane Evoy,et al.  Diameter-dependent electromechanical properties of GaN nanowires. , 2006, Nano letters.

[13]  Charles M. Lieber,et al.  Synthesis of p-Type Gallium Nitride Nanowires for Electronic and Photonic Nanodevices , 2003 .

[14]  Guosheng Cheng,et al.  Large-scale synthesis of single crystalline gallium nitride nanowires , 1999 .

[15]  J. Wu,et al.  Temperature-controlled catalytic growth of one-dimensional gallium nitride nanostructures using a gallium organometallic precursor , 2003 .

[16]  M. Ziolek.  Niobium-containing catalysts—the state of the art , 2003 .

[17]  T. N. Taylor,et al.  Thermal vaporization and deposition of gallium oxide in hydrogen , 1999 .

[18]  Shuyun Wang,et al.  Synthesis of three kinds of GaN nanowires through Ga2O3 films’ reaction with ammonia , 2005 .

[19]  Wendy L. Sarney,et al.  Growth of large-scale GaN nanowires and tubes by direct reaction of Ga with NH3 , 2000 .