A facile and rapid purification method for single-walled carbon nanotubes

Carbon Nanotubes in the Biological Interphase: The Relevance of Noncovalence

“…MWNTs or carbon nanofi bers, as a result of dangling bonds that serve as highly reactive sites. [ 43 ] Attempts to remove these sites have been made using various methods, called purifi cation processes, such as thermal oxidation, [ 44 ] acid treatment with thermal oxidation, [ 45 ] and a combination of ultrasonication and centrifugation using organic solvents [ 46 ] or polymers in water. [ 13 ] The efforts of removing impurities can generate a high density of functional groups or defects, which, in turn, infl uence the cytotoxicity as a result of the high surface area of the CNTs.…”

Radical Polymer‐Wrapped SWNTs at a Molecular Level: High‐Rate Redox Mediation Through a Percolation Network for a Transparent Charge‐Storage Material

“…The length of the SWNTs ranged from several hundred nanometers to micrometers, which is consistent with previous report on dispersion of SWNTs in DCB. [ 22 ] Secondly, a TEM sample of the dispersion was prepared on the copper grid without a carbon fi lm, where soluble PTMA was fi ltered off for the high-resolution analysis of the PTMAwrapped SWNTs. A TEM image of the PTMA-wrapped SWNT shows that wormlike chains of PTMA were adsorbed on the fl at surface of the SWNT with a width of 0.65 ± 0.06 nm in Figure 1 c, corresponding to the crystal-structure-determined size of the pendant TEMPO group in PTMA (Figure 1 b).…”

A Facile Approach to Single‐Wall Carbon Nanotube/Poly(allylamine) Nanocomposites

“…[21][22][23][24] Our research group has long been involved in the study of CNTs [25,26] and we have recently reported a novel and simple route to obtain supramolecular adducts [27] of CNT-DNA conjugates from both MWNTs and SWNTs based on a novel solid-state mechanochemical reaction. [28] In an earlier report we have also shown a rapid purification [29] and individualization [30] /dispersion [31] techniques for SWNTs. Motivated by these approaches introduced in our laboratory in association with our extensive experience with polymeric materials, [25,27,32,33] we attempted to expand this idea to the solubilization or dispersion of SWNTs with polymers, in turn facilitating the preparation of SWNT-polymer composites.…”