Dresden 2009 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 38: Nanostructured Materials II

MM 38.5: Talk

Thursday, March 26, 2009, 11:15–11:30, IFW B

Clean production of N-doped Singled-walled Carbon Nanotubes by CDV — •Jessica Walkenhorst¹, José M. Romo Herrera², Ana Laura Elias³, Humberto Terrones³, Mauricio Terrones³, and Martin E. Garcia¹ — ¹Theoretische Physik, Fachbereich Naturwissenschaften, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany — ²Colloid Chemistry Group at Phisico-Chemistry Department & CSIC Associated Unit in Universidad de Vigo, Vigo, Spain — ³Advanced Materials Department, IPICYT, San Luis Potosí, México

We synthesized pristine and N-doped Single-Wall-Carbon-Nanotubes (SWCNTs) by the CVD technique, involving the spray pyrolysis of a ferrocene solution in ethanol in an Ar atmosphere. When synthesizing N-doped SWCNTs, the solution also contained benzylamine. The aerosol containing the precursors is guided using a quartz tube into a furnace operating at 950 (965) ^∘C; synthesis times of 30-50 min. After the system cooled down the nanotube material was extracted and characterized. We used modified exprimental setups to increase the quality and quantities of the nanotubes produced. In one case, the gas flow upon cooling continues passing through the aerosol generator. In the other case, it passes directly into the quartz tube, thus bypassing the aerosol generator. The different SWCNT materials were mainly characterized using SEM, TGA and Raman spectroscopy. We observed clear differences in the D/G-band ratios, suggesting an increase in the sample’s quality where the carrier gas (upon cooling) was directed straight into the tube, bypassing the aerosol generator.