Flame synthesis of zinc oxide nanowires
نویسندگان
چکیده
Single-crystalline ZnO nanowires are grown directly on zinc-plated-steel substrates at high rates (microns/minute) using a flame-synthesis method, with no catalysts. The growth of the nanostructures is very sensitive to local gas-phase chemical species concentrations (O2, H2, CO2, H2O) and temperature (800–1500 K) as measured by laser-based spontaneous Raman spectroscopy. Larger-diameter (>100 nm) hexagonal-cross-section nanowires, with [0001] growth direction, are produced at higher temperatures; while smallerdiameter (25–40 nm) nanowires, with 1⁄211 20 growth direction, are produced at lower temperatures, and only on the fuel side of the reaction zone (with no oxygen present). Nanoribbons and other nanowire-based morphologies are also found and discussed. 2007 Elsevier B.V. All rights reserved.
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