Abstract
AbstractAfter chirality‐specified growth of single‐walled carbon nanotubes (SWCNTs) was realized by tungsten‐based intermetallic compound catalysts, here we developed a different kind of intermetallic compound, cobalt disilicide (CoSi2), as catalysts to selective grow carbon nanotubes by chemical vapor deposition (CVD). By using methane as carbon source, we obtained (11, 7) tubes with the selectivity of ∼24% and semiconducting SWCNTs (s‐SWCNTs) with the purity of ∼93% simultaneously. Because of the sensitivity of CoSi2 toward the oxygen‐containing environment at high temperatures, ethanol is not a good carbon feedstock. Our results not only expand the chirality library and catalyst database in the chirality‐selective synthesis of SWCNTs, but also further demonstrate the feasibility of intermetallic compound catalysts.
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