Purification of single-walled carbon nanotubes A. Yaya, C. P. Ewels, Ph. Wagner, I. Suarez-Martinez, A. Gebramariam Tekley and L. Rosgaard Jensen Eur. Phys. J. Appl. Phys., 54 1 (2011) 10401 Published online: 13 April 2011 DOI: 10.1051/epjap/2011100482