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Needle-shaped 3C-SiC nanowires were grown from commercially available SiC powders in a thermal evaporation process with iron as catalyst. A strong broad photoluminescence peak located around 450 nm was observed at room temperature, which may be ascribed to quantum size effects of nanomaterials. Needle-shaped 3C-SiC nanowires may have great potential applications such as blue-green light-emitting diodes...
Thin gallium nitride (GaN) films grown on silicon substrates are studied by infrared reflectance (IR) spectroscopy and scanning electron microscopy (SEM). For different samples, a variation of the reststrahlen band is observed. Through a theoretical analysis using a proposed three-component effective medium model, this variation of IR spectra is attributed to the polycrystalline nature of GaN grown...
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