title: Influence of Polymer Electronics on Selective Dispersion of Single-Walled Carbon Nanotubes.
abstract: The separation and isolation of semiconducting and metallic single-walled carbon nanotubes (SWNTs) on a large scale remains a barrier to many commercial applications. Selective extraction of semiconducting SWNTs by wrapping and dispersion with conjugated polymers has been demonstrated to be effective, but the structural parameters of conjugated polymers that dictate selectivity are poorly understood. Here, we report nanotube dispersions with a poly(fluorene-co-pyridine) copolymer and its cationic methylated derivative, and show that electron-deficient conjugated π-systems bias the dispersion selectivity toward metallic SWNTs. Differentiation of semiconducting and metallic SWNT populations was carried out by a combination of UV/Vis-NIR absorption spectroscopy, Raman spectroscopy, fluorescence spectroscopy, and electrical conductivity measurements. These results provide new insight into the rational design of conjugated polymers for the selective dispersion of metallic SWNTs.
authors: Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, ON, Canada.
authors: Darryl
authors: D
authors: Fong
authors: Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, ON, Canada.
authors: William J
authors: WJ
authors: Bodnaryk
authors: Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, ON, Canada.
authors: Nicole A
authors: NA
authors: Rice
authors: Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, ON, Canada.
authors: Sokunthearath
authors: S
authors: Saem
authors: Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, ON, Canada.
authors: Jose M
authors: JM
authors: Moran-Mirabal
authors: Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W., Hamilton, ON, Canada. adronov@mcmaster.ca.
authors: Alex
authors: http://orcid.org/0000-0002-0770-3118
authors: A
authors: Adronov
keywords: carbon materials; conducting materials; conjugated polymers; nanostructures; nanotubes