Abstract
Two-dimensional carbon nanostructures called carbon nanowalls (CNWs) were fabricated using dc plasma-enhanced chemical vapor deposition with a gas mixture of CH/sub 4/, H/sub 2/ and Ar. CNWs were vertically grown on quartz and Si substrates at temperatures of 500 to 800/spl deg/C. The size of CNWs was controlled by growth conditions such as CH/sub 4//H/sub 2/ ratio and substrate temperature. The structures of CNWs were characterized by Raman spectroscopy. The spectral features of CNWs are distinguished from those of typical graphite-like carbons reported so far. From the comparison of the spectral features, it is shown that CNWs are composed of small crystallites with a high degree of graphitization.
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