Growth and Structure of Mg-Al Spinel Nanodonut-Decorated MgO Nanowires
- Authors
- Kwon, Yong Jung; Na, Han Gil; Kim, Sang Sub; Wu, Ping; Kim, Hyoun Woo
- Issue Date
- Sep-2015
- Publisher
- KOREAN INST METALS MATERIALS
- Keywords
- composites; fibers; chemical synthesis; scanning electron microscopy (SEM); transmission electron microscopy (TEM)
- Citation
- METALS AND MATERIALS INTERNATIONAL, v.21, no.5, pp.956 - 961
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- METALS AND MATERIALS INTERNATIONAL
- Volume
- 21
- Number
- 5
- Start Page
- 956
- End Page
- 961
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/156446
- DOI
- 10.1007/s12540-015-4443-5
- ISSN
- 1598-9623
- Abstract
- We report the growth of MgO nanowires surrounded by a donut-shaped spinel in a periodic way at a particular growth temperature of 1,000 degrees C. We examined the samples by means of scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, and X-ray diffraction. At a lower temperature 950 degrees C, regular MgO nanowires grow. In contrast, at a higher temperature of 1,050 degrees C, spinel of (Mg0.4Al0.6)Al1.8O4 nanowires grow. From the absence of tip nanoparticles, we suggest that the synthesis of nanowires in the present study is dominated by a base-growth process. Based on the thermochemistry calculations, we propose that the absence of spinel in samples equilibrated at 950 degrees C is due to the catalytic-like behaviors of the silicon substrate which promotes the formation of MgO. In terms of choosing appropriate source materials, the technique reported here can be extended and exploited to produce various combinations of nanowire backbone structure with a surrounded nano-scale disk.
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