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Title: Gel electrophoresis using a selective radical for the separation of single-walled carbon nanotubes
Authors: Mesgari, Sara
Sundramoorthy, Ashok Kumar
Loo, Leslie S.
Chan-Park, Mary B.
Keywords: DRNTU::Engineering::Materials::Nanostructured materials
Issue Date: 2014
Source: Mesgari, S., Sundramoorthy, A. K., Loo, L. S., & Chan-Park, M. B. (2014). Gel electrophoresis using a selective radical for the separation of single-walled carbon nanotubes. Faraday discussions, 173, 351-363.
Series/Report no.: Faraday discussions
Abstract: We have applied agarose gel electrophoresis (AGE) to single-walled carbon nanotubes (SWNTs) that have been pre-reacted with metallic-selective ionic radicals and then re-suspended with sodium cholate (SC) surfactant to obtain highly purified (up to 98%) semiconducting single-walled carbon nanotubes (s-SWNTs). The proposed combination method exploits the preferential reactivity with the metallic nanotube of the radicals generated from an azo naphthalene compound (Direct Blue 71 (I)) to preferentially increase the surface charge, and therefore the electrophoretic mobilities, of the metallic nanotube population under the influence of the electric field in AGE. The excellent separation achieved was verified by UV-vis-NIR and Raman spectroscopy as well as by the performance of field effect transistors fabricated with semiconducting-enriched SWNTs. FETs fabricated with I-assisted AGE-separated semiconducting nanotubes exhibited mobilities of [similar]3.6 to 11.7 cm2 V−1 s−1 and on/off ratios from 10^2 to 10^6.
DOI: 10.1039/C4FD00092G
Rights: This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Journal Articles

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