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Samples of raw nanotubes are compared to those deposited from solutions to examine separation of nanotube bundles. Single wall nanotubes bundles produced by the arc-discharge and HiPco methods were solubilised in toluene, DMF and 1,2 dichloroethane. Resonant Raman spectroscopy was used to determine if debundling of the tubes sample occurred. The results showed some degree of debundling, best for the 1,2 dichloroethane solvent, which also shows long term solubility.
Gregan, E., Keogh, S.M. & Hedderman, T.G. (2005). Use of Raman spectroscopy in the investigation of debundling of single walled carbon nanotubes. Proceedings of OptoIreland, 2005. SPIE, vol. 5826, pg.56. doi:10.1117/12.605062