| Abstract
| - Delicate hollow ZnO urchins have been fabricated by thermal evaporation of metallic zinc powders in a tubefurnace without the use of additive, high temperature, or low pressure. The phase transformation, morphologies,and photoluminescence evolution of the ZnO products were carefully studied and investigated with X-raydiffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy(HRTEM), selected area electron diffraction (SAED), and photoluminescence (PL) spectra. These studiesindicated that the growth of hollow ZnO urchins involves the vaporization of Zn powder, solidification ofliquid droplets, surface oxidation, sublimation, and self-catalytic growth of one-dimensional nanowires.
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