Purification of carbon nanotubes using agarose column and density gradient ultracentrifugation
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United States of America Patent
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Nov 10, 2015
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Sep 3, 2015
app pub date -
Feb 3, 2014
filing date -
Jun 3, 2010
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Abstract
A method of processing bundles of carbon nanotubes (CNTs). Bundles of CNTs are put into a solution and unbundled using sonication and one or more surfactants that break apart and disperse at least some of the bundles into the solution such that it contains individual semiconducting CNTs, individual metallic CNTs, and remaining CNT bundles. The individual CNTs are separated from each other using agarose bead column separation using sodium dodecyl sulfate as a surfactant. Remaining CNT bundles are then separated out by performing density-gradient ultracentrifugation.
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