title: Length-dependent extraction of single-walled carbon nanotubes.
abstract: A two-phase liquid-liquid extraction process is presented which is capable of extracting water-soluble single-walled carbon nanotubes into an organic phase. The extraction utilizes electrostatic interactions between a common phase transfer agent and the sidewall functional groups on the nanotubes. Large length-dependent van der Waals forces for nanotubes allow the ability to control the length of nanotubes extracted into the organic phase as demonstrated by atomic force microscopy.
authors.affiliation: Department of Chemistry, Center for Nanoscale Science and Technology, Rice University, Houston, TX 77005, USA.
authors.forename: Kirk J
authors.initials: KJ
authors.lastname: Ziegler
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Schmidt
authors.forename: Urs
authors.initials: U
authors.lastname: Rauwald
authors.forename: Kunal N
authors.initials: KN
authors.lastname: Shah
authors.forename: Erica L
authors.initials: EL
authors.lastname: Flor
authors.forename: Robert H
authors.initials: RH
authors.lastname: Hauge
authors.forename: Richard E
authors.initials: RE
authors.lastname: Smalley
mesh_terms: D001965:Bromides / Q000737:chemistry; D005591:Chemical Fractionation / Q000379:methods*; D003102:Colloids / Q000737:chemistry* / Q000302:isolation & purification*; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D044367:Phase Transition; D000644:Quaternary Ammonium Compounds
chemical_list: D001965:Bromides; D003102:Colloids; D037742:Nanotubes, Carbon; D000644:Quaternary Ammonium Compounds; C051470:ammonium bromide