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A nanowire−nanocable−nanotube scheme was designed for fabricating tubular ZnO in a microwave plasma system. Depending on optimal reaction conditions, diameters (from submicrometer to nanometer) and wall thicknesses of the tubular ZnOs can be controlled in the process. Data from morphology analyses, X-ray diffraction, photoluminescence spectra and Raman spectroscopy of the as-prepared ZnO nanotubes support the validity of the proposed three-step route for the fabrication of tubular ZnO.
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Zhang et al. (2003) studied this question.
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