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Controlled growth of CNT in mesoporous AAO through optimized conditions for membrane preparation and CVD operation

Ciambelli, Paolo and Arurault, Laurent and Sarno, Maria and Fontorbes, Sandra and Leone, Caterina and Datas, Lucien and Sannino, Diana and Lenormand, Pascal and Le Blond Du Plouy, S. Controlled growth of CNT in mesoporous AAO through optimized conditions for membrane preparation and CVD operation. (2011) Nanotechnology, vol. 22 (n° 26). pp. 265613 (1)-265613 (12). ISSN 0957-4484

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Official URL: http://dx.doi.org/10.1088/0957-4484/22/26/265613

Abstract

Anodic aluminium oxide (RAAO) membranes with a mesoporous structure were prepared under strictly controlling experimental process conditions, and physically and chemically characterized by a wide range of experimental techniques. Commercial anodic aluminium oxide (CAAO) membranes were also investigated for comparison. We demonstrated that RAAO membranes have lower content of both water and phosphorus and showed better porosity shape than CAAO. The RAAO membranes were used for template growth of carbon nanotubes (CNT) inside its pores by ethylene chemical vapour deposition (CVD) in the absence of a catalyst. A composite material, containing one nanotube for each channel, having the same length as the membrane thickness and an external diameter close to the diameter of the membrane holes, was obtained. Yield, selectivity and quality of CNTs in terms of diameter, length and arrangement (i.e. number of tubes for each channel) were optimized by investigating the effect of changing the experimental conditions for the CVD process. We showed that upon thermal treatment RAAO membranes were made up of crystallized allotropic alumina phases, which govern the subsequent CNT growth, because of their catalytic activity, likely due to their Lewis acidity. The strict control of experimental conditions for membrane preparation and CNT growth allowed us to enhance the carbon structural order, which is a critical requisite for CNT application as a substitute for copper in novel nano-interconnects.

Item Type:Article
Additional Information:Thanks to Institute of Physics editor. The original version is available at http://iopscience.iop.org The original PDF of the article can be found at Nanotechnology website: http://iopscience.iop.org/0957-4484/22/26/265613
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Università degli Studi di Salerno - UniSa (ITALY)
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Deposited By: Denis Faragou
Deposited On:06 Jun 2012 21:07

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