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Non-filled MgO nanotube bundles have been fabricated via a thermal evaporation method using Mg strips as the source material. The samples were characterized using x-ray diffraction, scanning electron microscopy and transmission electron microscopy. The as-synthesized nanotubes self-assembled into bundles, and the nanotubes in a bundle had the same growth direction. The nanotubes are about 100 nm in diameter and several micrometres in length. The possible growth process for the MgO nanotube bundles has been discussed.
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Yang et al. (2004) studied this question.
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