Using Nonionic Surfactants for Production of Semiconductor-type Carbon Nanotubes by Gel-based Affinity Chromatography

Using Nonionic Surfactants for Production of Semiconductor-type Carbon Nanotubes by Gel-based Affinity Chromatography

Single-wall carbon nanotubes (SWCNTs) have remarkable properties based on their electronic properties, i.e., metallic or semiconducting types, but as-grown SWCNTs contain a mixture of both types. Presented here is an improved and detailed method for producing highly enriched semiconducting SWCNTs fr...

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Bibliographic Details
Main Authors: Varun Shenoy Gangoli, Juyan Azhang, Taryn T. Willett, Sean A. Gelwick, Erik H. Haroz, Junichiro Kono, Robert H. Hauge, Michael S. Wong
Format: Article
Language:English
Published: Wiley 2014-07-01
Series:Nanomaterials and Nanotechnology
Subjects:
Carbon Nanotube
Semiconductor
SWCNT
Separation
Affinity Chromatography
Online Access:http://www.intechopen.com/journals/nanomaterials_and_nanotechnology/using-nonionic-surfactants-for-production-of-semiconductor-type-carbon-nanotubes-by-gel-based-affini
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Summary:Single-wall carbon nanotubes (SWCNTs) have remarkable properties based on their electronic properties, i.e., metallic or semiconducting types, but as-grown SWCNTs contain a mixture of both types. Presented here is an improved and detailed method for producing highly enriched semiconducting SWCNTs from a colloidal suspension of as-grown SWCNTs through agarose gel column-based affinity chromatography. After a 2 wt% sodium dodecyl sulphate (SDS) aqueous dispersion of SWCNTs is passed through the gel column, metal-type SWCNTs preferentially elute out using a 1.5 wt% SDS solution. Semiconductor-type SWCNTs are subsequently recovered from the column using a 2 wt% Pluronic F77 surfactant solution eluent. The semiconductor-enriched fraction purity is in the 90-95% range, based on detailed UV- vis-NIR absorption and resonant Raman spectroscopy characterization of the particulate suspension. Semiconductor- type SWCNTs are recovered in solid form by evaporating the suspension fluid, and heating the dried sample in air to a temperature just above the Pluronic decomposition temperature. Using Pluronic and other nonionic-type surfactants can aid the scalability of the chromatographic production of semiconducting SWCNT samples.
ISSN:1847-9804

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