Growth direction determination of a single RuO2 nanowire by polarized Raman spectroscopy

Myung Hwa Kim, Jeong Min Baik, Seung Joon Lee, Hae Young Shin, Jaeyeon Lee, Seokhyun Yoon, Galen D. Stucky, Martin Moskovits, Alec M. Wodtke

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The dependence of band intensities in the Raman spectrum of individual single-crystal ruthenium dioxide (RuO2) nanowires on the angle between the plane of polarization of the exciting (and collected) light and the long axis of the nanowire, is shown to be a simple, complementary technique to high resolution transmission electron microscopy (HRTEM) for determining nanowire growth direction. We show that excellent agreement exists between what is observed and what is predicted for the polarization angle dependence of the intensities of the nanowires' Eg (525 cm-1) and the B2g (714 cm-1) Raman bands, only by assuming that the nanowires grow along the (001) crystallographic direction, as confirmed by HRTEM.

Original languageEnglish
Article number213108
JournalApplied Physics Letters
Issue number21
StatePublished - 24 May 2010

Bibliographical note

Funding Information:
We gratefully acknowledge the financial support from the Partnership for International Research and Education—for Electronic Chemistry and Catalysis at Interfaces—NSF Grant No. OISE-0530268. This work was supported by the Ewha Womans University Research Grant of 2009.


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