Composition containing single-walled nanotubes

摘要

An atmosphere of a carbon source comprising an oxygenic compound is brought into contact with a catalyst with heating to yield single-walled carbon nanotubes. The carbon source comprising an oxygenic compound preferably is an alcohol and/or ether. The catalyst preferably is a metal. The heating temperature is preferably 500 to 1,500° C. The single-walled carbon nanotubes thus obtained contain no foreign substances and have satisfactory quality with few defects.

主权项

1. A composition containing single-walled carbon nanotubes, the composition satisfying the conditions defined in a) to c) below;
a) when the composition containing the single-walled carbon nanotubes is thermally analyzed at temperature rising rate of 5° C./min, a peak position of a linear differential curve of weight decrease by burning is obtained at 500° C. or higher, and the half value width of the peak is smaller than 100° C.; b) when the composition is observed by a transmission electron microscope of 106-magnification, the single-walled carbon nanotubes are observed; c) when the composition containing single-walled carbon nanotubes is observed by a resonance Raman scattering measurement (an excitation wavelength is 488 nm); 1) G band is observed in 1590±10 cm−1 and said G band is split; 2) a peak height in 1350±10 cm−1 (D band) is one-third or lower of a peak height in the vicinity 1590±10 cm−1.