392119 Separation Mechanism of Carbon Nanotubes Via Aqueous Two-Phase Method: Towards Simple Isolation

Tuesday, November 18, 2014: 2:30 PM
International 5 (Marriott Marquis Atlanta)
Juan G. Duque1, Navaneetha Subbaiyan1, Sofie Cambre2, Erik Haroz1, Stephen Doorn1 and Nicholas Parra-Vasquez1, (1)Los Alamos National Laboratory, Los Alamos, NM, (2)University of Antwerp, Antwerp, Belgium

Single-wall carbon nanotubes (SWCNTs) are polydisperse in diameter and type; therefore multiple separation techniques have been developed to obtain selective tube distributions. In this work, we determined that the aqueous two-phase (ATP) separation mechanism is driven by the hydrophobicity of the surfactant, or combination of surfactants, covering the SWCNTs, which can be tuned by mixing different surfactants in well-defined ratios. The procedure is successfully applied to SWCNTs from different sources with various diameter (from 0.53nm to 1.2nm) and length (from 300nm to ~20um) distributions.

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