WO200281371-A2  AVDEEVA LYUDMILA B ET AL: "Iron-containing catalysts of methane decomposition: Accumulation of filamentous carbon" APPLIED CATALYSIS A , vol. 228, no. 1-2, 28 March 2002 (2002-03-28), pages 53-63, XP002226069;  CASSELL A M ET AL: "Large scale CVD synthesis of single-walled carbon nanotubes" JOURNAL OF PHYSICAL CHEMISTRY B, vol. 103, no. 31, 5 August 1999 (1999-08-05), pages 6484-6492, XP002226019 ISSN: 1089-5647;  HARUTYUNYAN A R ET AL: "CVD synthesis of single wall carbon nanotubes under "soft" conditions" NANO LETTERS, MAY 2002, AMERICAN CHEM. SOC, USA, vol. 2, no. 5, pages 525-530, XP002226016 ISSN: 1530-6984;  HERNADI K ET AL: "Fe-catalyzed carbon nanotube formation" CARBON, ELSEVIER SCIENCE PUBLISHING, NEW YORK, NY, US, vol. 34, no. 10, 1996, pages 1249-1257, XP004068885 ISSN: 0008-6223;  MING SU ET AL: "A scalable CVD method for the synthesis of single-walled carbon nanotubes with high catalyst productivity" CHEMICAL PHYSICS LETTERS, vol. 322, no. 5, 26 May 2000 (2000-05-26), pages 321-326, XP002226018 ISSN: 0009-2614 cited in the application;  PEIGNEY A ET AL: "Carbon nanotubes-Fe-alumina nanocomposites. Part I: influence of the Fe content on the synthesis of powders" JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, ELSEVIER SCIENCE PUBLISHERS, BARKING, ESSEX, GB, vol. 18, no. 14, 1 December 1998 (1998-12-01), pages 1995-2004, XP004144409 ISSN: 0955-2219;  PEIGNEY, ALAIN ET AL: "A Study of the Formation of Single- and Double-Walled Carbon Nanotubes by a CVD Method" JOURNAL OF PHYSICAL CHEMISTRY B , vol. 105, no. 40, 11 October 2001 (2001-10-11), pages 9699-9710, XP002226017;  WEIDENKAFF A ET AL: "Metal nanoparticles for the production of carbon nanotube composite materials by decomposition of different carbon sources" CURRENT TRENDS IN NANOTECHNOLOGIES: FROM MATERIALS TO SYSTEMS. SYMPOSIUM S, EMRS SPRING MEETING 2001, STRASBOURG, FRANCE, 5-8 JUNE 2001, vol. C19, no. 1-2, pages 119-123, XP001066301 Materials Science & Engineering C, Biomimetic and Supramolecular Systems, 2 Jan. 2002, Elsevier, Netherlands ISSN: 0928-4931;  WEIDENKAFF A ET AL: "Metal nanoparticles for the production of carbon nanotube composite materials by decomposition of different carbon sources" CURRENT TRENDS IN NANOTECHNOLOGIES: FROM MATERIALS TO SYSTEMS. SYMPOSIUM S, EMRS SPRING MEETING 2001, STRASBOURG, FRANCE, 5-8 JUNE 2001, vol. C19, no. 1-2, pages 119-123, XP001066301 Materials Science&Engineering C, Biomimetic and Supramolecular Systems, 2 Jan. 2002, Elsevier, Netherlands ISSN: 0928-4931