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Generic approach for dispersing single-walled carbon nanotubes: the strength of a weak interaction
Authors:Shvartzman-Cohen Rina  Levi-Kalisman Yael  Nativ-Roth Einat  Yerushalmi-Rozen Rachel
Institution:Department of Chemical Engineering and Ilse Katz Center for Meso- and Nanoscale Science and Technology, Ben Gurion University in the Negev, 84105 Beer Sheva, Israel.
Abstract:A generic noncovalent approach for dispersing high concentrations of individual single-walled carbon nanotubes (SWNT) in organic as well as aqueous solutions of synthetic block copolymers is presented. It is suggested that a weak, long-ranged entropic repulsion among polymer-decorated tubes acts as a barrier that prevents the tubes from approaching the attractive part of the intertube potential. The method opens a new route for utilization of block copolymers as compatibilizers for SWNT, improving the incorporation of de-agglomerated SWNT into target polymeric matrixes.
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