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Carbon nanotubes grown from individual gas phase prepared iron catalyst particles

✍ Scribed by Schäffel, F. ;Kramberger, C. ;Rümmeli, M. H. ;Kaltofen, R. ;Grimm, D. ;Grüneis, A. ;Mohn, E. ;Gemming, T. ;Pichler, T. ;Büchner, B. ;Rellinghaus, B. ;Schultz, L.

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
269 KB
Volume
204
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

We present a technique to grow carbon nanotubes by chemical vapour deposition of cyclohexane from separately generated catalytic iron nanoparticles. The catalyst particles are synthesized via inert‐gas condensation using DC‐sputtering at pressures in the mbar range. The preparation technique employed allows the production of individual and pure catalyst particles with a narrow particle size distribution. If deposited onto appropriate substrates these nanoparticles can act as individual nucleation sites for the growth of carbon nanotubes. Our findings show that the technique is highly viable for the precise engineering of nanoparticles in terms of material, size, purity, and density on substrates. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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## Abstract Organized carbon nanotubes (CNTs) have been grown at a fast rate by a gas‐phase, catalytic CVD technique at 600–750 °C for 15 min with the iron pentacarbonyl/acetylene/hydrogen system. The CNT growth at various temperatures and flow rates of iron pentacarbonyl, acetylene, and hydrogen,