Abstract
Single crystalline wurzite GaN nanorods are successfully synthesized on the tantalum catalyzed Si substrate by RF magnetron sputtering. The products are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectra (FTIR), transmission electron microscopy (TEM), selected-area electron diffraction (SAED) and photoluminescence (PL). The results show that the nanorods have a hexagonal wurtzite structure with diameters ranging from 80 to 200 nm and lengths typically up to 10 μm. The PL spectrum exhibits a strong UV light emission at 364 nm. The growth mechanism of the crystalline GaN nanorods is discussed briefly.
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