title: Room temperature purification of few-walled carbon nanotubes with high yield.
abstract: Purification of high-quality few-walled carbon nanotubes (fWNTs) was developed by slow but selective oxidation in hydrogen peroxide (H(2)O(2)) at room temperature. The purity, nanotubes' structure, and thermal stability of purified fWNTs were characterized by transmission electron microscopy (TEM), Raman spectroscopy, and thermogravimetric analysis (TGA), respectively. The results showed that fWNTs could be selectively purified by prolonging the stirring time in 30 wt % H(2)O(2) solution. Highly purified fWNTs were obtained, having a high G/D ratio in Raman spectra and good thermal stability indicating the good quality of the purified fWNTs. The approach provides a simple low cost method for purification that also has higher nanotube yield than other purification methods.
authors.affiliation: Department of Chemistry, Duke University, Durham, North Carolina 27708, USA.
authors.forename: Yiyu
authors.initials: Y
authors.lastname: Feng
authors.forename: Hongbo
authors.initials: H
authors.lastname: Zhang
authors.forename: Ye
authors.initials: Y
authors.lastname: Hou
authors.forename: Thomas Patrick
authors.initials: TP
authors.lastname: McNicholas
authors.forename: Dongning
authors.initials: D
authors.lastname: Yuan
authors.forename: Sungwoo
authors.initials: S
authors.lastname: Yang
authors.forename: Lei
authors.initials: L
authors.lastname: Ding
authors.forename: Wei
authors.initials: W
authors.lastname: Feng
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
mesh_terms: D003102:Colloids / Q000737:chemistry; D003460:Crystallization / Q000379:methods*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013499:Surface Properties; D013696:Temperature
chemical_list: D003102:Colloids; D046911:Macromolecular Substances; D037742:Nanotubes, Carbon; D006861:Hydrogen Peroxide