Ozonolysis of Functionalized Single-Walled Carbon Nanotubes
Authors: Chen, Zheyi; Hauge, Robert H.; Smalley, Richard E.
Source: Journal of Nanoscience and Nanotechnology, Volume 6, Number 7, July 2006 , pp. 1935-1938(4)
Publisher: American Scientific Publishers
Abstract:Room temperature ozonolysis of fluorinated SWNT and phenyl-sulfonated SWNT have been studied in perfluoropolyether (PFPE) solvents. Etching at the end caps (∼70 nm/hour for fluorinated SWNT/PFPE suspension with 1 g/l concentration) has been demonstrated to be the dominating effect during the ozonolysis of fluorinated SWNT. Base on characterization by AFM analysis, X-ray Photoelectron Spectroscopy (XPS) and Raman Spectroscopy, fluorination along the SWNT side-walls protects F-SWNT from extensive functionalization by ozonolysis. An ozone reaction with fluorinated SWNT has been found to improve its solubility in 96% sulfuric acid. This allows oxidative cutting by ammonium peroxydisulfate without defluorination. In comparison to fluorinated SWNT, phenyl-sulfonated SWNT was found to be effectively and homogeneous cut by ozonolysis in a water suspension.
Document Type: Research Article
Publication date: 2006-07-01
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