Letter abstract
Nature Nanotechnology 1, 112 - 116 (2006)
Published online: 22 October 2006 | doi:10.1038/nnano.2006.56
Subject Categories: Carbon nanotubes and fullerenes | Electronic properties and devices | Synthesis and processing
Direct growth of aligned carbon nanotubes on bulk metals:
S. Talapatra1,2, S. Kar1, S. K. Pal1, R. Vajtai2, L. Ci1, P. Victor1, M. M. Shaijumon1, S. Kaur1, O. Nalamasu1 & P. M. Ajayan1,2
Abstract
There are several advantages of growing carbon nanotubes (CNTs) directly on bulk metals, for example in the formation of robust CNT–metal contacts during growth. Usually, aligned CNTs1, 2, 3, 4, 5, 6, 7, 8, 9 are grown either by using thin catalyst layers predeposited on substrates1, 2, 3, 4, 5, 6, 7 or through vapour-phase catalyst delivery7, 8, 9. The latter method, although flexible, is unsuitable for growing CNTs directly on metallic substrates. Here we report on the growth of aligned multiwalled CNTs on a metallic alloy, Inconel 600 (Inconel), using vapour-phase catalyst delivery. The CNTs are well anchored to the substrate and show excellent electrical contact with it. These CNT–metal structures were then used to fabricate double-layer capacitors and field-emitter devices, which demonstrated improved performance over previously designed CNT structures. Inconel coatings can also be used to grow CNTs on other metallic substrates. This finding overcomes the substrate limitation for nanotube growth which should assist the development of future CNT-related technologies.
- Department of Materials Science & Engineering, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, New York 12180, USA
- Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, New York 12180, USA
Correspondence to: S. Talapatra1,2 e-mail: talaps@rpi.edu
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