A method was proposed for evaluating the ratio of metallic (M) to semiconducting (S) single-wall carbon nanotubes (SWNT) in the different fractions of the separation process using resonance raman spectroscopy (RRS) at several laser exitation energy values. The selective stabilization of octadecylamine (ODA) on S SWNT was found to provide a means for the bulk separation of S from M SWNT. Utilizing RRS and the relative changes in the integrated intensities of the radial-breathing mode region, a generic method was developed to provide quantitative evaluation of the separation efficiency between M and S SWNT along with diameter separation. It was observed that the ODA-assisted separation is effective in generating fractions five times enriched in S SWNT.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)