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Nanoscale. 2015 Oct 14;7(38):15741-7. doi: 10.1039/c5nr04851f. Epub 2015 Sep 9.

A hybrid enrichment process combining conjugated polymer extraction and silica gel adsorption for high purity semiconducting single-walled carbon nanotubes (SWCNT).

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Security and Disruptive Technologies Portfolio, National Research Council Canada, 1200 Montreal Road, M-12, Ottawa, Ontario K1A 0R6, Canada.


A novel purification process for the enrichment of sc-SWCNTs that combines selective conjugated polymer extraction (CPE) with selective adsorption using silica gel, termed hybrid-CPE (h-CPE), has been developed, providing a high purity sc-SWCNT material with a significant improvement in process efficiency and yield. Using the h-CPE protocol, a greater than 5 fold improvement in yield can be obtained compared to traditional CPE while obtaining sc-SWCNT with a purity >99.9% as assessed by absorption spectroscopy and Raman mapping. Thin film transistor devices using the h-CPE derived sc-SWCNTs as the semiconductor possess mobility values ranging from 10-30 cm(2) V(-1) s(-1) and current ON/OFF ratio of 10(4)-10(5) for channel lengths between 2.5 and 20 μm.


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