AI Article Synopsis
- The study examines absorption cross sections for the first two optical transitions (E11 and E22) in seven types of semiconducting single-walled carbon nanotubes (SWCNTs) in bulk suspensions.
- Concentrations of the different species were measured using short-wave IR fluorescence microscopy, allowing for precise counting of SWCNTs in samples.
- Results show that the absorption cross sections per atom are inversely related to the diameter of the nanotubes, with mod 1 species having larger E11 cross sections, whereas mod 2 species show larger E22 cross sections.
Article 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.
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| http://dx.doi.org/10.1021/nl404791y | DOI Listing |
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