A Comprehensive Review on Separation Methods and Techniques for Single-Walled Carbon Nanotubes

Abstract

Structural control of single-walled carbon nanotubes (SWNTs) is attracting enormous interest in view of their applications to nanoelectronics and nanooptics. Actually, more than 200 papers regarding separation of SWNTs have been published since 1998. In this review, they are classified into the following five sections according to the separation methods; electrophoresis, centrifugation, chromatography, selective solubilization and selective reaction. In each method, all literature is summarized in tables showing the separated objects (metallic/semiconducting (M/S), length, diameter, (n, m) structure and/or handedness), the production process of the used SWNTs (CoMoCAT, HiPco, arc discharge and/or laser vaporization) and the employed chemicals, such as detergents and polymers. Changes in annual number of publications related to this subject are also discussed.

Coating Mechanisms of Single-Walled Carbon Nanotube by Linear Polyether Surfactants: Insights from Computer Simulations

“…The models of DME, DMP, PPO 5 , PPO 5 and Pluronics L64 (see Scheme 1S) were developed in our research group and the details of the models have been recently published. [17][18] All polymers used in this study have methyl groups as terminal groups.…”

“…In fact the high surface/volume ratio present in SWCNTs may have a strongly affect on the adsorption capability of polymeric materials. 15 In the second part of the study the effect of the polymer length and tacticity on the absorption of the SWCNT(5,5) was investigated using pentamers (n=5 in the Scheme 1S) of PEO (PEO 5 ) and of different isomers of PPO (PPO 5 ). Finally, in the last part, the absorption of the small triblock copolymer L64 (see Scheme 1S) on a single and a SWCNT (5,5) bundle formation was studied.…”

“…15 In the second part of the study the effect of the polymer length and tacticity on the absorption of the SWCNT(5,5) was investigated using pentamers (n=5 in the Scheme 1S) of PEO (PEO 5 ) and of different isomers of PPO (PPO 5 ). Finally, in the last part, the absorption of the small triblock copolymer L64 (see Scheme 1S) on a single and a SWCNT (5,5) bundle formation was studied. The aim of this last part was to analyze whether the absorption mechanism obtained from our model systems agrees with the available experimental and theoretical data.…”

Electroactive carbon nanoforms: a comparative study via sequential arylation and click chemistry reactions

“…In addition to the absorption assays, we subjected pristine 10 SWCNTs, SWCNT-1 and SWCNT-2 to fluorescence measurements in DMF. Accordingly, measurements performed with pristine SWCNTs reveal maxima at 1057, 1128, 1211, 1305, and 1419 nm, which correspond to (10,2), (7,6), (11,3), (13,2), and (9,8) SWCNT, respectively (Figure 8). 31 It is important to 15 note that the fluorescence features mirror image those seen in the absorption measurements.…”

Carbon nanotubes functionalized by salts containing stereogenic heteroatoms as electrodes in their battery cells

“…Based on an analogy with the procedure for the attachment of oxygen and nitrogen radicals to salt of single-walled carbon nanotubes synthesis is based on the use of feedstock carbon nanotubes (MWCNT and SWCNT) 14 . Carbon nanotubes are functionalized on the outer surfaces of the reactive functional groups [C(O) Cl, OH, NH 2 ]…”