Controlled carboxylic acid introduction: a route to highly purified oxidized single walled carbon nanotubes
Citation:
Flavin K., Kopf I., Del Canto E., Navio C., Bittencourt C. and Giordani S.*, Controlled carboxylic acid introduction: a route to highly purified oxidized single walled carbon nanotubes, Journal of Materials Chemistry, 44, 21, 2011, 17881-17887Download Item:
controlled.pdf (Published (publisher's copy) - Peer Reviewed) 410.7Kb
Abstract:
A chemical treatment for preparing high purity selectively oxidised SWNTs while preserving optical/
electronic properties of the material has been developed. Efficient removal of both metal and
carbonaceous impurities has been demonstrated by AFM, TEM, Raman and absorption spectroscopy,
while XPS confirmed quantitative conversion of oxidised defects to functionalisable carboxylic acid
groups. Furthermore persistence of the characteristic optical properties was confirmed using
absorption and NIR photoluminescence spectroscopy, thus indicating preservation of the electronic
structure. This chemical treatment thus paves the way for the preparation of high purity, covalently
functionalised SWNTs enhancing their potential for use in high-performance optical/electronic
applications. A comparison with commonly used purification protocols that utilize nitric acid and
sodium hydroxide followed by piranha solution treatments or simple solvent washing is made,
highlighting the advantages of the reported method for the production of SWNT starting materials
ideal for efficient chemical modifications.
Sponsor
Grant Number
Science Foundation Ireland (SFI)
PIYRA 07/YI2/I1052).
European Commission
PERG-GA-2009-249178
Irish Research Council for Science and Engineering Technology (IRCSET)
Author's Homepage:
http://people.tcd.ie/giordanshttp://people.tcd.ie/kopfi
Description:
PUBLISHEDIF=5.1, cit 3
Author: GIORDANI, SILVIA; KOPF, ILONA
Type of material:
Journal ArticleCollections:
Series/Report no:
Journal of Materials Chemistry44
21
Availability:
Full text availableKeywords:
oxidised SWNTsSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.1039/C1JM12217GLicences: