Synthesis and Characterization of Al2O3/SiO2 Coaxial Nanowire Heterostructures with Periodical Twinning Structures
Authors: Su, Yong; Meng, Xia; Chen, Yiqing; Zhou, Qingtao; Li, Sen; Liang, Xuemei; Feng, Yi
Source: Journal of Nanoscience and Nanotechnology, Volume 8, Number 7, July 2008 , pp. 3483-3486(4)
Publisher: American Scientific Publishers
Abstract:Al2O3/SiO2 coaxial nanowire heterostructures were synthesized on a silicon substrate by a simple thermal evaporation method. The structure and morphology of the as-synthesized nanostructure were characterized using scanning electron microscopy and transmission electron microscopy. The growth of Al2O3/SiO2 coaxial nanowire heterostructures follows a vapor-solid (VS) process. Studies indicate that typical nanostructure consists of single twinning-crystalline Al2O3 nanowires (core) with diameter of about 50 nm and amorphous SiO2 shell. Photoluminescence properties were also investigated at room temperature. The photoluminescence spectrum reveals the product has a blue emission band and two UV emission bands.
Document Type: Research Article
Publication date: July 1, 2008
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