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M. Arab, F. Berger, F. Picaud, C. Ramseyer, J. Glory and M. Mayne-L’Hermite, “Direct Growth of the Multi-Walled Carbon Nanotubes as a Tool to Detect Ammonia at Room Temperature,” Chemical Physics Letters, Vol. 433, No. 1-3, 2006, pp. 175-181. Doi:10.1016/j.cplett.2006.10.036

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• TITLE: The Production of CNT Flower-Like Structures with 3-Fold and 4-Fold Symmetries on a Pt/Si Substrate

  AUTHORS: Madjid Arab, Marjorie David, Jean-Christophe Valmalette, Christophe Ramseyer

  KEYWORDS: Carbon Nanotube; Aerosol-CVD; 3-Fold and 4-Fold Symmetries; Flower Shape

  JOURNAL NAME: Advances in Chemical Engineering and Science, Vol.3 No.1, January 23, 2013

  ABSTRACT: Carbon nanotubes flower (CNTs-F) films were prepared by catalytic chemical vapor deposition (CVD) on a platinum (Pt) thin layer, supported on a silicon wafer. The products were synthesized from an aerosol composed of ferrocene and toluene, as catalyst and carbon precursor respectively, at 820. The high synthesis temperature induces a modification of a Pt thin layer to a nano-structured island giving rise to the formation of CNTs-F during the following films growth step by CVD process. The suggested mechanism involves the selective diffusion of the catalyst and carbon atoms through the Pt grain boundaries. This results in the appearance of flower-like structures with 3-and 4-fold symmetries.