Raman spectra and dispersion. (a) Raman spectra of samples B001 and B113 (blue and red curves, respectively) measured in acoustic spectral range with excitation wavelength of 514.5 nm. (b) Dispersion of folded LA and QLA phonons calculated for samples B001 and B113 with nominal thickness (blue and red curves, respectively). A horizontal line and solid blue symbols indicate the value of the scattering wave vector used in the Raman experiment and the frequencies of the folded LA phonons.
Milekhin et al. Nanoscale Research Letters 2012 7:476 doi:10.1186/1556-276X-7-476