Search

Abstract: Novel SiO2 hierarchical nanostructure has been grown on SiC nanowires using thermal decomposition of a mixture of ethanol and titanium tetrachloride. Novel nanostructure was realized in one synthesis route. Based on SEM and TEM observations, the hierarchical nanostructure consists of core-shell SiC–SiO2 main stem nanowire and a lot of SiO2 nanorod branches grown on the main stem. A mean diameter of SiC central cores was about 40nm and their lengths reach about 100μm. The lengths and diameters of SiO2 nanorod-like branches were ranged in 400–800nm and 30–120nm, respectively. The growth of core-shell SiC–SiO2 nanowires obeyed vapor–liquid–solid mechanism and the SiO2 nanorod-like branches grew via vapor–solid mechanism. The infrared absorption and photoluminescence properties of the grown nanostructure were investigated. [Copyright &y& Elsevier]