Journal
ACS OMEGA
Volume 2, Issue 3, Pages 1163-1171Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.6b00468
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Funding
- Deutsche Forschungsgemeinschaft (DFG) [FL 834/1-1, FL 834/2-1]
- DFG under INST [163/354-1]
- European Research Council under the European Union's Seventh Framework Programme [306298]
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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 halfmaximum 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.
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