title: Fitting Single-Walled Carbon Nanotube Optical Spectra.
abstract: In this work, a comprehensive methodology for the fitting of single-walled carbon nanotube absorption spectra is presented. Different approaches to background subtraction, choice of line profile, and calculation of full width at half-maximum are discussed both in the context of previous literature and the contemporary understanding of carbon nanotube photophysics. The fitting is improved by the inclusion of exciton-phonon sidebands, and new techniques to improve the individualization of overlapped nanotube spectra by exploiting correlations between the first- and second-order optical transitions and the exciton-phonon sidebands are presented. Consideration of metallic nanotubes allows an analysis of the metallic/semiconducting content, and a process of constraining the fit of highly congested spectra of carbon nanotube solid films according to the spectral weights of each (n,m) species in solution is also presented, allowing for more reliable resolution of overlapping peaks into single (n,m) species contributions.
authors.affiliation: Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, 76021 Karlsruhe, Germany; Institute of Materials Science, Technische Universität Darmstadt, Jovanka-Bontschits-Str. 2, 64287 Darmstadt, Germany.
authors.forename: Moritz
authors.initials: M
authors.lastname: Pfohl
authors.affiliation: Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, 76021 Karlsruhe, Germany; Centre for Nanoscale Science and Technology, Flinders University, GPO Box 2100, 5042 Adelaide, Australia.
authors.forename: Daniel D
authors.initials: DD
authors.lastname: Tune
authors.affiliation: Institute for Physical Chemistry, Universität Heidelberg , Im Neuenheimer Feld 253, 69120 Heidelberg, Germany.
authors.forename: Arko
authors.initials: A
authors.lastname: Graf
authors.affiliation: Institute for Physical Chemistry, Universität Heidelberg , Im Neuenheimer Feld 253, 69120 Heidelberg, Germany.
authors.forename: Jana
authors.initials: J
authors.lastname: Zaumseil
authors.affiliation: Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P.O. Box 3640, 76021 Karlsruhe, Germany; Institute of Materials Science, Technische Universität Darmstadt, Jovanka-Bontschits-Str. 2, 64287 Darmstadt, Germany.
authors.forename: Ralph
authors.initials: R
authors.lastname: Krupke
authors.affiliation: Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) , P.O. Box 3640, 76021 Karlsruhe, Germany.
authors.forename: Benjamin S
authors.initials: BS
authors.lastname: Flavel