期刊论文

Zhao, Danna

Huang, H (reprint author), Dalian Univ Technol, Dept Elect Sci & Technol, Fac Elect Informat & Elect Engn, Dalian 116024, Peoples R China.

Huang, Hui,Wu, Haibo,Ren, Mingkun,Zhu, Huichao,Liu, Yan,Sun, Baojuan

2013-12-01

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE

SCIE、EI、Scopus

J

210

12

2689-2692

1862-6300

Au; Ni catalyst; GaN; nanowires; NH3; N-2 flow rate

GaN nanowires (NWs) were grown on Ni- and Au/Ni-coated Si (100) substrate by chemical vapor deposition via reaction of metallic Ga and NH3. It was found that the Au/Ni layer tends to form liquid droplets with more uniform size distribution and regular spherical shape under annealing, which facilitates the growth of straight and long NWs. The effects of NH3/N-2 ratio on NW growth are different for Ni and Au/Ni catalysts, due to the competition between the vapor-solid (VS) and vapor-liquid-solid (VLS) growth. The XRD analyses indicate that with decreasing NH3 flow rate, [0001] axial growth becomes dominant with the formation of NiGa4 catalyst.