Support-Catalyst-Gas Interactions during Carbon Nanotube Growth on Metallic Ta Films (Articolo in rivista)

Type
Label
  • Support-Catalyst-Gas Interactions during Carbon Nanotube Growth on Metallic Ta Films (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/jp102986f (literal)
Alternative label
  • B. C. Bayer, S. Hofmann, C. Castellarin-Cudia, R. Blume, C. Baehtz, S. Esconjauregui, C. T. Wirth, R. A. Oliver, C. Ducati, A. Knop-Gericke, R. Schloegl, A. Goldoni, C. Cepek, and J. Robertson (2011)
    Support-Catalyst-Gas Interactions during Carbon Nanotube Growth on Metallic Ta Films
    in Journal of physical chemistry. C. (Online); ACS, American chemical society, Washington, DC (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • B. C. Bayer, S. Hofmann, C. Castellarin-Cudia, R. Blume, C. Baehtz, S. Esconjauregui, C. T. Wirth, R. A. Oliver, C. Ducati, A. Knop-Gericke, R. Schloegl, A. Goldoni, C. Cepek, and J. Robertson (literal)
Pagina inizio
  • 4359 (literal)
Pagina fine
  • 4369 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://pubs.acs.org/doi/abs/10.1021/jp102986f (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 115 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 11 (literal)
Note
  • Scopus (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • B. C. Bayer,*,+ S. Hofmann,+ C. Castellarin-Cudia,?,§ R. Blume,|| C. Baehtz,^ S. Esconjauregui,+ C. T. Wirth,+ R. A. Oliver,# C. Ducati,# A. Knop-Gericke,|| R. Schloegl,|| A. Goldoni,§ C. Cepek,? and J. Robertson+ +Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, United Kingdom ?Istituto Officina dei Materiali-CNR, Laboratorio TASC, s.s. 14 km 163.5, I-34149 Trieste, Italy §Sincrotrone Trieste SCpA, s.s. 14 km 163.5, I-34012 Trieste, Italy ) Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-14195 Berlin-Dahlem, Germany ^Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, D-01314 Dresden, Germany #Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB2 3QZ, United Kingdom (literal)
Titolo
  • Support-Catalyst-Gas Interactions during Carbon Nanotube Growth on Metallic Ta Films (literal)
Abstract
  • We present a detailed study of processes and interactions occurring during the Fe-catalyzed chemical vapor deposition of carbon nanotubes on metallic Ta supports. In situ X-ray photoemission spectroscopy and X-ray diffraction show that the Fe catalyst increases the reactivity of Ta toward oxidation and carbide formation, whereas Ta promotes the reduction of Fe. This causes an unusual temperature dependence of carbon nanotube growth, where at low temperatures (~550 ?C) vertically aligned forests of carbon nanotubes with ohmic contacts grow readily on metallic Ta, whereas at high temperatures (>600 ?C) nanotube growth is sparse because of the diffusion of Fe away from the surface through grain boundaries of in situ formed polycrystalline Ta2O5. The Fe- Ta model system highlights general material selection criteria for nanotube applications that require a conductive support. (literal)
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