Using Nonionic Surfactants for Production of Semiconductor-Type Carbon Nanotubes by Gel-Based Affinity Chromatography

Nanomaterials and Nanotechnology

Taryn T. Willett¹  Varun Shenoy Gangoli¹  Erik H. Haroz¹  Junichiro Kono¹  Michael S. Wong¹  Robert H. Hauge¹  Juyan Azhang¹  Sean A. Gelwick¹ 

关键词: Carbon Nanotube;    Semiconductor;    SWCNT;    Separation;    Affinity Chromatography;   

DOI  :  10.5772/58828

来源: InTech

【 摘 要 】

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...

【 授权许可】

Unknown