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Isolation of Specific Small Diameter Single-Wall Carbon Nanotube Species via Aqueous Two-Phase Extraction



Jeffrey A. Fagan, Constantine Y. Khripin, Carlos A. Silvera Batista, Jeffrey R. Simpson, Angela R. Hight Walker, Ming Zheng


Aqueous two-phase extraction (ATPE) is demonstrated to enable isolation of multiple semiconducting and metallic single-wall carbon nanotube species from a small diameter synthetic mixture. Separation by ATPE is rapid and robust, with remarkable tunability that allows isolation of single nanotube chiralities at high purity via modification of the surfactant environment set for the separation. Primary diameter separation was achieved using a fixed content of a bile salt surfactant in the system and varying the concentration of a second surfactant such as sodium dodecyl sulfate, however alternate strategies are additionally reported. Specific species extracted at high purity for this contribution include the (5,5), (6,4), (6,5), (6,6), (7,3), (7,4), (7,5), (7,6), (8,3), (8,4), (9,2), and (9,4). Species identification is made on the basis of optical absorbance, near infrared fluorescence, and Raman spectroscopies.
Journal of the American Chemical Society


nanotube, SWCNT, single-wall carbon nanotube, extraction, separation


Fagan, J. , Khripin, C. , Silvera, C. , Simpson, J. , Hight, A. and Zheng, M. (2014), Isolation of Specific Small Diameter Single-Wall Carbon Nanotube Species via Aqueous Two-Phase Extraction, Journal of the American Chemical Society, [online], (Accessed June 24, 2024)


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Created January 21, 2014, Updated November 10, 2018