title: Directly measured optical absorption cross sections for structure-selected single-walled carbon nanotubes.
abstract: We have measured peak and spectrally integrated absolute absorption cross sections for the first (E11) and second (E22) optical transitions of seven semiconducting single-walled carbon nanotube (SWCNT) species in bulk suspensions. Species-specific concentrations were determined using short-wave IR fluorescence microscopy to directly count SWCNTs in a known sample volume. Measured cross sections per atom are inversely related to nanotube diameter. E11 cross sections are larger for mod 1 species than for mod 2; the opposite is found for E22.
authors: Department of Chemistry and Richard E. Smalley Institute for Nanoscale Science and Technology, Rice University , 6100 Main Street, Houston, Texas 77005, United States.
authors: Jason K
authors: JK
authors: Streit
authors: Sergei M
authors: SM
authors: Bachilo
authors: Saunab
authors: S
authors: Ghosh
authors: Ching-Wei
authors: CW
authors: Lin
authors: R Bruce
authors: RB
authors: Weisman