Narrow (n,m)-distribution of single-walled carbon nanotubes grown using a solid supported catalyst.

By S. Bachilo, L. Balzano, J. Herrera, F. Pompeo, D. Resasco, R. Weisman. Journal of the American Chemical Society, 2003

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Unusually structure-selective growth of single-walled carbon nanotubes (SWNTs) has been attained using a CVD method with a solid supported catalyst. In this method, CO feedstock disproportionates on silica-supported catalytic nanoclusters of Co that are formed in situ from mixed salts of Co and Mo. The nanotube products are analyzed by spectrofluorimetry to reveal distributions resolved at the level of individual (n,m) structures. Two structures, (6,5) and (7,5), together dominate the semiconducting nanotube distribution and comprise more than one-half of that population. The average diameter of produced SWNTs is only 0.81 nm, and a strong propensity is found favoring chiral angles near the armchair limit.

Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/7c5b44af61f4707276e7fdda597097cef8f27115

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Citations in the corpus

• A DNA-based approach to the carbon nanotube sorting problem (2008, background): “The most selective synthesis processes reported to date yield one or two major CNT species in 20% 30% abundance, along with many other minor species of similar diameter [2 4].”
• Current understanding of the growth of carbon nanotubes in catalytic chemical vapour deposition (2013, background): “Beyond this general trend, highly-selective synthesis of SWCNTs of high chiral angles were reported using specific catalyst systems such as Co-MCM41 [251], , CoSO4/SiO2 [252], Co–Mo [253,254], Fe-Ru [255], Fe-Co [245], Fe-Cu [256] or Al-Cu-Fe [257] (Figure 10).”
• Large-scale single-chirality separation of single-wall nanotubes by simple gel chromatography (2011, background): “The purification yield and efficiency of a specific ( n , m ) can be improved markedly if it is present at a high level in the starting material (for example, (6, 5)-enriched Comocat nanotube”