ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 15    No. 2    April 2005

[PDF]    [Flash]
Synthesis and characterization of single-crystalline alumina nanowires
ZHAO Qing(赵 清), XU Xiang-yu(徐向宇), ZHANG Hong-zhou(张洪洲), 
CHEN Yao-feng(陈耀锋), XU Jun(徐 军), YU Da-peng(俞大鹏)
(School of Physics, State Key Laboratory for Mesoscopic Physics, Peking University, Beijing 100871, China)
Abstract: Alumina nanowires were synthesized on large-area silicon substrate via simple thermal evaporation method of heating a mixture of aluminum and alumina powders without using any catalyst or template. The phase structure and the surface morphology of the as-grown sample were analyzed by X-ray diffractometry(XRD) and scanning electron microscopy(SEM), respectively. The chemical composition and the microstructure of the as-grown alumina nanowires were characterized using transmission electron microscope(TEM). The nanowires are usually straight and the single crystalline has average diameter of 40nm and length of 3-5μm. The growth direction is along the [002] direction. Well aligned alumina nanowire arrays were observed on the surface of many large particles. The catalyst-free growth of the alumina nanowires was explained under the framework of a vapor-solid(VS) growth mechanism. This as-synthesized alumina nanowires could find potential applications in the fabrication of nanodevices. 
Key words: alumina nanowires; vapor-solid growth; nanomaterials
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
Managed by Central South University (CSU) 湘ICP备09001153号-9