2009
DOI: 10.1021/nl8034866
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Simple and Scalable Gel-Based Separation of Metallic and Semiconducting Carbon Nanotubes

Abstract: We report a rapid and scalable method for the separation of metallic and semiconducting single-wall carbon nanotubes (SWCNTs); the separation is performed by the selective adsorption of semiconducting SWCNTs on agarose gel. The most effective separation was realized by a simple procedure in which a piece of gel containing SWCNTs and sodium dodecyl sulfate was frozen, thawed, and squeezed. This process affords a solution containing 70% pure metallic SWCNTs and leaves a gel containing 95% pure semiconducting SWC… Show more

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Cited by 313 publications
(322 citation statements)
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“…Recent work has also demonstrated that it is possible to achieve limited separation of exfoliated SWNTs according to (n,m) structure, 58,121,136 left-or right-handed chirality, 95 length, 137,138 and electronic character (i.e., metallic or semiconducting). [139][140][141][142][143][144][145] SWNT surfactants are classified in terms of their ionic character (i.e., anionic, cationic, or nonionic). Ionic surfactants have a positively or negatively charged head group that interacts with the solvent and a nonpolar tail that associates with the nanotube sidewall; SWNT aggregation is hindered by charge repulsion between the polar head groups that extend into the solvent.…”
Section: Motivationmentioning
confidence: 99%
“…Recent work has also demonstrated that it is possible to achieve limited separation of exfoliated SWNTs according to (n,m) structure, 58,121,136 left-or right-handed chirality, 95 length, 137,138 and electronic character (i.e., metallic or semiconducting). [139][140][141][142][143][144][145] SWNT surfactants are classified in terms of their ionic character (i.e., anionic, cationic, or nonionic). Ionic surfactants have a positively or negatively charged head group that interacts with the solvent and a nonpolar tail that associates with the nanotube sidewall; SWNT aggregation is hindered by charge repulsion between the polar head groups that extend into the solvent.…”
Section: Motivationmentioning
confidence: 99%
“…Recently, novel M/S separation methods have been developed using agarose gel [15][16][17][18][19][20]. Agarose is a biopolymer obtained from algae and is a gel-forming linear polysaccharide with a 1,3-β-D-galactose and 1,4-α-L-3,6-anhydro-galactose repeat unit.…”
mentioning
confidence: 99%
“…Thus, agarose gel electrophoresis was first applied to separate SWCNTs, and the M/S separation was successful [15]. In addition, the electric field was determined not to be required for the separation [16], and the continuous column method was developed [17]. Most recently, the single-chirality separation of SWCNTs using a multicolumn with a polysaccharide gel, cross-linked dextran, was reported [21].…”
mentioning
confidence: 99%
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“…Recently, significant progress has been achieved in the separation of single-walled carbon nanotubes [1][2][3] and the application of nanotubes with well-defined structure in nanoelectronic devices [4]. Single-walled carbon nanotubes (or, simply, nanotubes) have a honeycomb cylindrical structure consisting entirely of carbon atoms, which determines their unique physical properties.…”
Section: Introductionmentioning
confidence: 99%