Analysis of carbon nanotube chiralities obtained from a bimetallic Co-Mo catalyst

作者：Fouquet Martin^*; Hofmann Stephan; Thomsen Christian; Robertson John

来源：Physica Status Solidi B-Basic Solid State Physics, 2010, 247(11-12): 2660-2663.

DOI：10.1002/pssb.201000120

• carbon nanotubes
• chiral map
• growth
• Raman
• SWNT

All growth methods for single-walled carbon nanotubes (SWNTs) usually result in a wide distribution of chiral indices (n,m). Bimetallic catalysts can narrow this distribution [1,2]. Here we grow SWNTs by a Co-Mo catalyst and measure the different chiral distributions for an array of growth parameters. A CoMo-acetate solution as described by Miyauchi et al. [1] was used to prepare the catalyst With chiral maps we find that the absolute diameter range for the SWNT is about 0.7-1.7 nm for all samples. Hereby metallic and semiconducting tubes favour different diameters and thus divide the full range in two intervals. Histogramms made for the chiral angle distribution of the assigned SWNT suggest that semiconducting tubes favour a chiral angle of 20 degrees-25 degrees.

• 出版日期2010-12