Peculiarities of Raman spectra of polyurethane/carbon nanotube composite A. Naumenko, V. Yashchuk, V. Bliznyuk and S. Singamaneni Eur. Phys. J. B, 85 4 (2012) 120 Published online: 18 April 2012 DOI: 10.1140/epjb/e2012-20628-y