Abstract
We have successfully synthesized single-crystal ZnO nanotubes and tubular whiskers by employing Zn(NO 3) 2·6H 2O, NH 3·H 2O as the starting materials in the presence of polyethylene glycol (PEG, M w=2000) at ambient pressure and low temperature (70 °C). Characterizations are carried out by X-ray powder diffraction (XRD), X-ray energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), transmission electron microscopy (TEM, HRTEM) and photoluminescence (PL) measurement. The results show that the as-prepared ZnO are tubular textures, which have average cross-sectional dimensions of 200–300 nm, lengths of 2–3.5 μm, and wall thickness of 80 nm. These tubular products demonstrate a sharp ultraviolet excitonic emission peak centered at 385 nm at room temperature. A possible growth mechanism and the influence of the reaction temperature on the formation of crystalline ZnO are presented.
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