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Abstract: Large-scale SiC–SiO2 core–shell nanowires decorated with carbon nanoparticles have been synthesized on Si substrate using thermal decomposition of ethanol. The amorphous carbon nanoparticles on SiO2 shell are of hemispherical configuration hiving a mean diameter of about 20nm. The average size of carbon nanoparticles estimated from Raman measurement is 23.4nm close to that evaluated from transmission electron microscopic observation. Strong enhancement of blue emission band and appearance of a new yellow emission band were observed in SiC–SiO2 core–shell nanowires decorated with carbon nanoparticles and their origins were discussed. A possible synthesis mechanism of SiC–SiO2 core–shell nanowires decorated with carbon nanoparticles was proposed. [Copyright &y& Elsevier]

Abstract: We report on the quantum confinement effect and field-emitting characteristics of ultrathin 3C–SiC nanobelts synthesized by a simple and low-cost microwave method. Morphological analysis indicates that the nanobelts are tens of micrometers in length, tens of nanometers in width and only several nanometers in thickness. Under 325nm excitation, a broad emission peaked at 391nm has been observed in the spectrum of the nanobelts, which reveals an obvious blueshift of bandgap. Field-emission measurements show that the nanobelts are promising field-emitting materials with a low turn-on field of ∼3.2V/μm. [Copyright &y& Elsevier]