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Raman and FT-IR studies on dye-assisted dispersion and flocculation of single walled carbon nanotubes

Zhang, W and Silva, SRP (2010) Raman and FT-IR studies on dye-assisted dispersion and flocculation of single walled carbon nanotubes SPECTROCHIM ACTA A, 77 (1). pp. 175-178.

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Aqueous suspensions of single walled carbon nanotubes (SWCNTs) were prepared with the aid of dye molecules to form thermodynamically stable colloidal systems. By adding sodium chloride electrolyte, SWCNTs flocculated and settled out due to the destabilization of colloidal systems initiated by the increase in ionic strength. The dye molecules were removed by heat treatment at 300 degrees C for 5 h following washing with water. Raman spectroscopy was used to monitor the whole procedure. The resulting spectra confirm the non-deconstructive dispersion and flocculation of SWCNTs and the complete removal of the dye molecules; Fourier transform infrared spectroscopy also confirms this. (c) 2010 Elsevier B.V. All rights reserved.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre
Authors :
Date : 15 September 2010
Identification Number : 10.1016/j.saa.2010.05.002
Uncontrolled Keywords : Single walled carbon nanotube, Raman spectroscopy, Fourier transform infrared spectroscopy, Colloid, Dye, SPECTROSCOPY
Additional Information : NOTICE: this is the author’s version of a work that was accepted for publication in SPECTROCHIM ACTA A. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in SPECTROCHIM ACTA A, 77(1), September 2010, DOI 10.1016/j.saa.2010.05.002.
Depositing User : Symplectic Elements
Date Deposited : 18 Jan 2013 09:48
Last Modified : 23 Sep 2013 19:52

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