CVD growth of carbon nanotubes using molecular nanoclusters as catalyst

The growth of isolated carbon nanotubes (CNTs) using chemical vapour deposition process catalysed by the molecular nanocluster {Mo72Fe30} of the Keplerate structure type in different oxidation states is studied on different substrates. The molecule in its oxidized state (MoVI/FeIII) agglomerates in...

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Bibliographic Details
Published in:Physica status solidi. B. Basic research 2009-12, Vol.246 (11‐12), p.2494-2497
Main Authors: Goss, K., Kamra, A., Spudat, C., Meyer, C., Kögerler, P., Schneider, C. M.
Format: Article
Language:English
Subjects:
36.40.–c
81.07.De
81.15.Gh
81.16.Hc
Catalytic methods
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Methods of nanofabrication
Nanoscale materials and structures: fabrication and characterization
Nanotubes
Physics
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Summary:The growth of isolated carbon nanotubes (CNTs) using chemical vapour deposition process catalysed by the molecular nanocluster {Mo72Fe30} of the Keplerate structure type in different oxidation states is studied on different substrates. The molecule in its oxidized state (MoVI/FeIII) agglomerates in solution. Thus, nucleation from large catalyst particles cannot provide a narrow CNT diameter distribution. However, a partially reduced and charged form of the same molecule (MoV/MoVI) enables growth from small nucleation sites as evidenced by atomic force microscope imaging, albeit the yield in this case is dramatically reduced.
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.200982320