Synthesis of large-scale SiC–SiO 2 nanowires decorated with amorphous carbon nanoparticles and Raman and PL properties

Abstract

Large-scale SiC–SiO 2 core–shell nanowires decorated with carbon nanoparticles have been synthesized on Si substrate using thermal decomposition of ethanol. The amorphous carbon nanoparticles on SiO 2 shell are of hemispherical configuration hiving a mean diameter of about 20 nm. The average size of carbon nanoparticles estimated from Raman measurement is 23.4 nm 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–SiO 2 core–shell nanowires decorated with carbon nanoparticles and their origins were discussed. A possible synthesis mechanism of SiC–SiO 2 core–shell nanowires decorated with carbon nanoparticles was proposed.