Raman spectra and the calculated frequency positions. (a) Raman spectra for samples A001, B001, C001, D001 and A113, C113, D113 (blue and red curves, respectively) measured in acoustic spectral range with excitation wavelength of 514.5 nm. (b) The calculated frequency positions of folded LA and QLA phonons shown by blue and red triangles, respectively.
Milekhin et al. Nanoscale Research Letters 2012 7:476 doi:10.1186/1556-276X-7-476