Nobile Concetta, Fonoberov Vladimir A, Kudera Stefan, Torre Antonio Della, Ruffino Antonio, Chilla Gerwin, Kipp Tobias, Heitmann Detlef, Manna Liberato, Cingolani Roberto, Balandin Alexander A, Krahne Roman
National Nanotechnology Laboratory of CNR-INFM, Via per Arnesano, 73100 Lecce, Italy.
Nano Lett. 2007 Feb;7(2):476-9. doi: 10.1021/nl062818+. Epub 2007 Jan 23.
We investigated the optical phonon excitations of laterally aligned nanorod arrays by resonant Raman scattering. We observed a strong suppression of the surface-optical phonon modes in the closely packed aligned arrays and a small asymmetry in the longitudinal-optical phonon peak with respect to the rod alignment orientation. These observations can be explained by the spatial distribution of the potential of the different phonon modes derived from the first principles calculations.
