Hydrothermal growth of ZnO nanorods on a-plane GaN/sapphire template

• Published in: Journal of crystal growth Vol. 312; no. 20; pp. 2857 - 2860
• Main Authors: Sahoo, Trilochan, Choi, Jung-Hun, Yoo, Ju-Wan, Yu, Yeon-Tae, Jeon, Seong-Ran, Baek, Jong-Hyeob, Yoon, Hyung-Do, Hwang, Sung-Min, Lee, In-Hwan
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-10-2010; Elsevier
• Subjects: A1. X-ray diffraction; A2. Hydrothermal crystal growth; Arrays; B1. Nanomaterials; B2. Semiconductor VI–II materials; Cross-disciplinary physics: materials science; rheology; Diffraction; Exact sciences and technology; Gallium nitrides; Materials science; Methods of crystal growth; physics of crystal growth; Methods of nanofabrication; Nanorods; Nanoscale materials and structures: fabrication and characterization; Other topics in nanoscale materials and structures; Physics; Quantum wires; Sapphire; Theory and models of crystal growth; physics of crystal growth, crystal morphology and orientation; Zinc; Zinc oxide; B1. Nanomaterials; B2. Semiconductor VI–II materials; A1. X-ray diffraction; A2. Hydrothermal crystal growth; Crystal growth; Zinc nitrate; B2. Semiconductor VI-II materials; Epitaxy; Photoluminescence; XRD; Gallium nitride; Precursor; Aqueous solutions; Optical properties; Zinc oxide; Nanorod; Nanomaterial synthesis; Epitaxial layers; Template reaction; Electron microscopy; III-V compound; Temperature measurement; Hydrothermal growth; Monocrystals; Hydrothermal synthesis; Morphology; Growth mechanism; Arrays; Nanostructured materials; III-V semiconductors
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2010.06.038

ZnO nanorod arrays are grown on
a-plane GaN template/
r-plane sapphire substrates by hydrothermal technique. Aqueous solutions of zinc nitrate hexahydrate and hexamethylenetetramine were employed as growth precursors. Electron microscopy and X-ray diffraction measurements were carried out for morphology, phase and growth orientation analysis. Single crystalline nanorods were found to have off-normal growth and showed well-defined in-plane epitaxial relationship with the GaN template. The 〈0
0
0
1〉 axis of the ZnO nanorods were observed to be parallel to the 〈1
0
1¯
0〉 of the
a-plane GaN layer. Optical property of the as-grown ZnO nanorods was analyzed by room temperature photoluminescence measurements.