Abstract
Aqueous suspensions of nanotubes, as well as the structure and optical properties of their aggregates (bundles), are studied by spectroscopy and high-resolution electron microscopy. The structure of nanoparticles is controlled by varying the ultrasonication time during preparation of suspensions. It is found that the defectiveness of nanotubes increases with decreasing bundle size. A correlation is shown to take place between the suspension preparation regime, the structure of nanoparticles, and the relaxation of the photoexcitation energy of their electronic shells. It is found that the efficiency of photoexcitation energy conversion into heat increases with increasing degree of aggregation of nanotubes into bundles.
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Original Russian Text © A.V. Venediktova, V.N. Bocharov, A.Yu. Vlasov, I.M. Kislyakov, V.M. Kiselev, E.A. Kats, E.D. Obraztsova, A.S. Pozharov, S.A. Povarov, 2014, published in Optika i Spektroskopiya, 2014, Vol. 116, No. 3, pp. 448–453.
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Venediktova, A.V., Bocharov, V.N., Vlasov, A.Y. et al. Aqueous suspensions of single-wall carbon nanotubes: Degree of aggregation into bundles and optical properties. Opt. Spectrosc. 116, 418–423 (2014). https://doi.org/10.1134/S0030400X14030230
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DOI: https://doi.org/10.1134/S0030400X14030230