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Raman spectra for InN (a) NWs and (b) NBs. Full curve: total fitted spectrum, dashed curves: individual fitted peaks. Peaks corresponding to SO mode are indicated by arrows.
Calculated SO phonon frequencies as a function of , full curve: SO , dashed curve: SO . Horizontal full and dashed lines are the TO and LO frequencies of and modes, respectively. Symbols are measured SO frequencies, open symbol: NWs, filled symbol: NBs. Vertical line at corresponds to .
(a) Raman spectra of InN NBs immersed in . Full curve: total fitted spectrum, dashed curves: individual fitted peaks. The inset shows SO modes under the expanded range of . (b) Reduction in intensities in SO modes with increasing average diameter of the nanostructures. Fitted curves are shown only for SO modes, indicated by arrows.
Surface roughness in typical (a) NWs and (b) NBs. Arrows show the modulation in the surface structure. Diameters and the calculated wavelengths of surface potential are also inscribed.
Raman modes in NWs and NBs samples of wurtzite InN.
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