N. R. Arutyunyan, Z. E. Aldikanji, S. V. Terekhov, E. D. Obraztsova
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引用次数: 0
Abstract
Fractions of single-walled carbon nanotubes separated by diameter and conductivity type are obtained by aqueous two-phase extraction. In the case of the sodium cholate - Pluronic F127 pair of surfactants, the upper fraction is enriched with nanotubes of smaller diameters, while the lower fraction is enriched with nanotubes of larger diameters. In the case of the sodium cholate - sodium dodecylsulfate pair, the upper fraction is enriched with semiconducting nanotubes, while metallic nanotubes dominate in the lower fraction. The effect of the surfactant concentration on the purity of the fractions separated by conductivity type is studied. The concentrations of polymers and surfactants used in the one-step separation are found to provide the 97.6% purity of the metallic fraction and more than 99.9% of the semiconductor fraction.
期刊介绍：
Journal is an interdisciplinary publication covering all aspects of structural chemistry, including the theory of molecular structure and chemical bond; the use of physical methods to study the electronic and spatial structure of chemical species; structural features of liquids, solutions, surfaces, supramolecular systems, nano- and solid materials; and the crystal structure of solids.
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