title: Comparative measures of single-wall carbon nanotube dispersion.
abstract: Model composites of DNA-wrapped single-wall carbon nanotubes in poly(acrylic acid) are used to evaluate metrics of nanotube dispersion. By varying the pH of the precursor solutions, we introduce a controlled deviation from ideal behavior. On the basis of small-angle neutron scattering, changes in near-infrared fluorescence intensity are strongly correlated with dispersion, while optical absorption spectroscopy and resonant Raman scattering are less definitive. Our results represent the first systematic comparison of currently accepted measures of nanotube dispersion.
authors.affiliation: Polymers Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA. jeffery.fagan@nist.gov
authors.forename: J A
authors.initials: JA
authors.lastname: Fagan
authors.forename: B J
authors.initials: BJ
authors.lastname: Landi
authors.forename: I
authors.initials: I
authors.lastname: Mandelbaum
authors.forename: J R
authors.initials: JR
authors.lastname: Simpson
authors.forename: V
authors.initials: V
authors.lastname: Bajpai
authors.forename: B J
authors.initials: BJ
authors.lastname: Bauer
authors.forename: K
authors.initials: K
authors.lastname: Migler
authors.forename: A R Hight
authors.initials: AR
authors.lastname: Walker
authors.forename: R
authors.initials: R
authors.lastname: Raffaelle
authors.forename: E K
authors.initials: EK
authors.lastname: Hobbie
mesh_terms: D000178:Acrylamides / Q000737:chemistry; D004247:DNA / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D036103:Nanotechnology; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013059:Spectrum Analysis, Raman
chemical_list: D000178:Acrylamides; D037742:Nanotubes, Carbon; C431184:poly(acrylamide-co-acrylic acid); D004247:DNA