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IrO 2

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Summary(II)<br />

The Raman scattering results reveal three Ramanactive<br />

modes, identified as E g, B 2g and A 1g. The<br />

intensity of certain modes depends on orientation of<br />

NCs and follows the selection rules. This indicates a<br />

possibility to determine the preferable growth<br />

direction of NCs under Raman investigations.<br />

The Raman peaks red shifts and the asymmetric<br />

broadening describe the trends due to phonon<br />

confined effect of the nanoscaled dimensions and<br />

residual stress.

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