title: Estimation of the (n,m) concentration distribution of single-walled carbon nanotubes from photoabsorption spectra.
abstract: Deconvolution of the absorption spectrum of single-walled carbon nanotubes (SWNTs) into distinct (n,m) contributions is complicated because transition energies are closely spaced. The algorithm presented in this work attempts to simplify the problem by grouping nanotubes with similar transition energies and assigning weights to their spectral contributions. Voigt line shapes were used to fit absorption spectra of sodium dodecyl sulfate suspended HiPco SWNT and CoMoCat SWNT. Line widths for the metallic (93.42 meV) and two semiconducting regions (57.96 and 29.86 meV) were obtained from the absorption spectra of DNA-wrapped SWNT fractionated by ion-exchange chromatography. The method is used to describe the reaction kinetics of certain HiPco SWNTs upon reaction with 4-chlorobenzene diazonium and 4-hydroxybenzene diazonium salts. The code for deconvolution has been provided as open source in the Supporting Information for future modifications.
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
authors.forename: Nitish
authors.initials: N
authors.lastname: Nair
authors.forename: Monica L
authors.initials: ML
authors.lastname: Usrey
authors.forename: Woo-Jae
authors.initials: WJ
authors.lastname: Kim
authors.forename: Richard D
authors.initials: RD
authors.lastname: Braatz
authors.forename: Michael S
authors.initials: MS
authors.lastname: Strano
mesh_terms: D000465:Algorithms; D002852:Chromatography, Ion Exchange / Q000379:methods; D004247:DNA / Q000737:chemistry; D003979:Diazonium Compounds / Q000737:chemistry; D004735:Energy Transfer; D007700:Kinetics; D008670:Metals / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000032:analysis* / Q000737:chemistry; D012666:Semiconductors; D012680:Sensitivity and Specificity; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D003979:Diazonium Compounds; D008670:Metals; D037742:Nanotubes, Carbon; D012967:Sodium Dodecyl Sulfate; D004247:DNA