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M. S.D. Lekgoathi, J. Heveling, W.G. Augustyn, S.J. Husselman, P.G. Masha, and S. Rossouw, “Effect of Carboxylate Functional Groups on The Surface Area of SWCNTs”, International Journal of Nanotechnology and Applications, Vol. 2, no. 2, 2008, pp. 141-148.

has been cited by the following article:

• TITLE: Spectroscopic Investigation of Modified Single Wall Carbon Nanotube (SWCNT)

  AUTHORS: S Hussain, P Jha, A Chouksey, R Raman, S.S. Islam, T Islam, P.K Choudhary

  KEYWORDS: Single Wall Carbon Nanotubes, Functionalization, Raman Spectroscopy, Ftir and Uv-Vis-Nir Spectroscopy

  JOURNAL NAME: Journal of Modern Physics, Vol.2 No.6, July 1, 2011

  ABSTRACT: We have investigated the effects of chemical treatment on Single Wall Carbon Nanotube (SWCNT) before and after being modified with HNO3/H2SO4 by Raman, FTIR and UV-Vis-NIR spectroscopy. The results show successful carboxylation of the CNT sidewalls as observed from FTIR and UV-Vis-NIR spectroscopy. This successful functionalization is achieved in 6-8 hrs of refluxing. We also report changes in the first and second order Raman spectra of SWNTs functionalized with oxygenated groups. During the experiment, we observe some important Raman features: Radial breathing mode (RBM), Tangential mode (G-band), and Disordered mode (D-band); which are affected due to the chemical oxidation of carbon nanotubes. We found that the ratio of D- to the G-band intensity (Id/Ig), increase after functionalization and the RBM mode in acid treated SWCNTs is almost disappeared.