Density control of single-walled carbon nanotubes using patterned iron nanoparticle catalysts derived from phase-separated thin films of a polyferrocene block copolymerElectronic supplementary information (ESI) available: synthesis of PS-b-PFEMS, SWNT growth and characterization. See http://www.rsc.org/suppdata/jm/b4/b403831b/

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Abstract
Single-walled carbon nanotube (SWNT) density and bundle size has been controlled by a simple one step CVD growth process using a polyferrocenylsilane block copolymer as the pre-organized catalyst source.