High quality double wall carbon nanotubes with a defined diameter distribution by chemical vapor deposition from alcohol |
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| Authors: | A Grüneis MH Rümmeli C Kramberger A Barreiro T Pichler R Pfeiffer H Kuzmany T Gemming B Büchner |
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| Affiliation: | aIFW Dresden, P.O. Box 270116, D-01171 Dresden, Germany;bInstitut Català de Nanotecnologica and Centro Nacional de Microelectrónica, Campus Universitat Autónoma de Barcelona, E-08193 Bellaterra, Spain;cInstitut für Materialphysik, Strudlhofgasse 4, A-1090 Wien, Austria |
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| Abstract: | We have synthesized double wall carbon nanotubes (DWNTs) with few defects and little amorphous carbon by hot wall chemical vapor deposition (CVD) of alcohol. Catalysts for the DWNT growth were made from cobalt and molybdenum acetates. Scanning electron microscopy, transmission electron microscopy, multi frequency resonance Raman spectroscopy and optical absorption spectroscopy were used for characterization of the product with regard to DWNT yield, the nanotube diameter distribution, defect concentration and amorphous carbon content. Base pressures lower than 1 × 10−5 mbar in the CVD reactor considerably suppress defects in the DWNTs. Optimized growth conditions for DWNT formation are presented. |
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| Keywords: | Carbon nanotubes Chemical vapor deposition Raman spectroscopy Transmission electron microscopy Light scattering |
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