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

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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.

Keywords: HETEROSTRUCTURES; PHOTOLUMINESCENCE; THERMAL EVAPORATION; TWINNING-CRYSTALLINE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2008.114

Publication date: July 1, 2008

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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