title: Polarized raman study of aligned multiwalled carbon nanotubes
abstract: Polarized Raman spectra of high purity aligned arrays of multiwalled carbon nanotubes, prepared on silica substrates from the thermal decomposition of a ferrocene-xylene mixture, show a strong dependence of the graphitelike G band and the disorder-induced D band on the polarization geometry employed in the experiments. The experimental G-band intensity exhibits a minimum at straight theta(m) = 55 degrees in the VV configuration, in good agreement with theoretical predictions of a characteristic minimum at 54.7 degrees for A(1g) modes in single wall nanotubes, where straight theta(m) denotes the angle between the polarization direction and the nanotube axis.
authors.affiliation: Center for Applied Energy Research, Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA.
authors.initials: AM
authors.lastname: Rao
authors.initials: A
authors.lastname: Jorio
authors.initials: MA
authors.lastname: Pimenta
authors.initials: MS
authors.lastname: Dantas
authors.initials: R
authors.lastname: Saito
authors.initials: G
authors.lastname: Dresselhaus
authors.initials: MS
authors.lastname: Dresselhaus