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The effects of growth conditions on the morphology of ZnO nanostructures grown by CVD process with Au catalyst were systemically studied and the key factors controlling growth were identified. Two growth modes of ZnO formation were observed: self-catalyzed growth on Si substrate and gas-phase nucleation and growth. In the former case, the ZnO nanostructures grow by the vapor-solid mechanism and the...
In the previous work, we reported that TiO2 nanorods could be successfully grown on Ta substrates using titanium tetra isopropoxide (TTIP) as a single precursor without any carriers or bubbling gases. In the mean time, columnar-structured C doped TiO2 was grown on glass substrates by MOCVD method. For change of surface properties, grown columnar-structured C-TiO2 was treated by O2 plasma. After O2...
Well aligned Si nanowires (SiNWs) by Vapor-Liquid-Solid growth process are presented. Instead of using H2, the current work uses N2 as carrier gas. The growth conditions of SiNWs are controlled by the ratio of nitrogen versus silane gas. Tapering of nanowires was found at T=620degC and P=333 m torr, and the tapering parameter was reduced by increasing the N2 gas. Tapering of nanowires is attributed...
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