Growth direction determination of a single RuO nanowire by polarized Raman spectroscopy

摘要

The dependence of band intensities in the Raman spectrum of individual single-crystal rutheniumndioxide u0002RuO2u0003 nanowires on the angle between the plane of polarization of the exciting u0002andncollectedu0003 light and the long axis of the nanowire, is shown to be a simple, complementary techniquento high resolution transmission electron microscopy u0002HRTEMu0003 for determining nanowire growthndirection. We show that excellent agreement exists between what is observed and what is predictednfor the polarization angle dependence of the intensities of the nanowires’ Eg u0002525 cm−1nu0003 and thenB2g u0002714 cm−1nu0003 Raman bands, only by assuming that the nanowires grow along the u0002001u0003ncrystallographic direction, as confirmed by HRTEM. © 2010 American Institute of Physics.nu0004doi:10.1063/1.3435475