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FE-SEM images of the well-aligned ZnO nanorods on the PLD prepared ZnO film substrate: (a)–(c) tilted view images with different magnification; (d) plane-view image; (e) shows the histograms of ZnO nanorods diameters. The curve is a Gaussian fit of the rod diameter distribution and the mean diameter of about 250 nm.
(a) XRD pattern of the as-prepared well-aligned ZnO nanorods; (b) rocking curve of the as-prepared sample. In contrast, the rocking curve of the ZnO substrate is shown in the inset.
Raman spectra of the as-prepared well-aligned ZnO nanorod array.
(a) Low temperature (13 K) photoluminescence (PL) spectra of the as-prepared well-aligned ZnO nanorod array. Enlarged ultraviolet emission band is shown in the inset. Free exciton emission is located at 3.375 eV and denoted by ; (b) temperature-dependent PL spectra of the sample. intensity becomes stronger relative to the peaks with the increasing of temperature.
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