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Modelling Nanostructured Carbon Materials for Future ICT Applications
2008 (English)Conference paper, Poster (Refereed)
Abstract [en]

Carbon nanotubes (CNTs) have, due to their remarkable mechanical, electronic and thermal properties, many suggested uses, and have even been demonstrated as interconnects and nano-transistors in laboratory built devices [1-4]. This is an important effort since metallic CNTs have lower resistivity than Cu, and semiconducting CNTs have higher mobility than Si, which are traits that could help push the boundaries of Moore s law even further. The reason CNTs are not yet incorporated into electronics is due to growth control and placement issues. With present day state-of-the-art techniques it is not possible to grow CNTs with only one property (i.e. either all metallic or all semiconducting), which presents the first and principal hurdle for the utilisation of CNTs in semiconductor industry. It is, however, possible to grow CNTs of a certain type (multi-walled, double-walled, or single walled), within a rather narrow diameter distribution. It is also well understood how the orientation of the honey-comb structure relative to the CNT axis determines the property of the CNT itself. The problem lies in realizing growth of CNTs with control over this internal graphene structuring. We have performed first-principles calculations of how single-walled carbon nanotubes (SWNTs) bond with different metal nanoparticles explaining why the traditional catalysts (Fe, Co, Ni) are more successful than other metals (Cu, Pd, Au) [5], and how this realization relates to new nanocomposite catalyst particles (Cu/Mo) [6]. We will present our contribution to understanding the mechanism of CNT growth, since it is only through better knowledge that property-controlled growth of CNTs can be achieved

Place, publisher, year, edition, pages
2008.
Identifiers
URN: urn:nbn:se:ltu:diva-38694Local ID: d275b765-d149-4c3e-95d0-676a32576b0eOAI: oai:DiVA.org:ltu-38694DiVA: diva2:1012195
Conference
Tyndall/Ulster/Notre dame Workshop : 21/07/2008 - 22/07/2008
Note
Upprättat; 2008; 20130603 (andbra)Available from: 2016-10-03 Created: 2016-10-03

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