Figure 7.

The determination of Raman. (a) Micro-Raman spectra of the cross-section are obtained by scanning from the bottom of the interface to the surface. (b)The phonon frequencies of the E2 (high) and FWHM vary with depth.

Liu et al. Nanoscale Research Letters 2011 6:69   doi:10.1186/1556-276X-6-69
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