Quantitative analysis of dispersion and doping of individual carbon nanotubes in water based solutions using absorption and Raman spectroscopy | Zendy

Priya B. R. | Zendy; Byrne H. J. | Zendy

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Quantitative analysis of dispersion and doping of individual carbon nanotubes in water based solutions using absorption and Raman spectroscopy

Author(s) -

Priya B. R.,

Byrne H. J.

Publication year - 2008

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.200879562

Subject(s) - raman spectroscopy , carbon nanotube , protonation , analytical chemistry (journal) , dispersion (optics) , absorption (acoustics) , doping , absorption spectroscopy , spectroscopy , pulmonary surfactant , chemistry , materials science , nanotechnology , optics , physics , chromatography , organic chemistry , ion , optoelectronics , biochemistry , quantum mechanics , composite material

The concentration dependence of the dispersion of carbon nanotubes in water surfactant solution is monitored using absorption and Raman spectroscopy revealing a debundling below ∼0.07 g/l. A quantitative analysis of the doping of individual carbon nanotubes in surfactant at this concentration is conducted by varying the pH from 1 to 13 and monitoring the Raman spectrum. Mixed Gaussian and Lorentzian line shapes were fitted to the radial breathing modes and using a simple protonation model, an equilibrium constant K p was obtained for each RBM. The protonation rate was related to the optical band gap of the tubes and the number of protons acting per entity was also calculated. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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