The use of NH3 to promote the production of large-diameter single-walled carbon nanotubes with a narrow (n,m) distribution

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We demonstrate here a simple and effective (n,m)-selective growth of single-walled carbon nanotubes (SWCNTs) in an aerosol floating catalyst chemical vapor deposition (CVD) process by introducing a certain amount of ammonia (NH3). Chiralities of carbon nanotubes produced in the presence of 500 ppm NH3 at 880 ̊C are narrowly distributed around the major semiconducting (13,12) nanotube with over 90% of SWCNTs having large chiral angles in the range 20̊-30̊, and nearly 50% in the range 27̊-29̊. The developed synthesis process enables chiral-selective growth at high temperature for structurally stable carbon nanotubes with large diameters.


Original languageEnglish
Pages (from-to)1224-1227
Number of pages4
JournalJournal of the American Chemical Society
Issue number5
Publication statusPublished - 9 Feb 2011
MoE publication typeA1 Journal article-refereed

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