Direct characterization of nanocrystal size distribution using Raman spectroscopy

İlker Doğan, Mauritius C. M. van de Sanden
2013 Journal of Applied Physics  
We report a rigorous analytical approach based on one-particle phonon confinement model to realize direct detection of nanocrystal size distribution and volume fraction by using Raman spectroscopy. For the analysis, we first project the analytical confinement model onto a generic distribution function, and then use this as a fitting function to extract the required parameters from the Raman spectra, i.e., mean size and skewness, to plot the nanocrystal size distribution. Size distributions for
more » ... ilicon nanocrystals are determined by using the analytical confinement model agree well with the one-particle phonon confinement model, and with the results obtained from electron microscopy and photoluminescence spectroscopy. The approach we propose is generally applicable to all nanocrystal systems, which exhibit size-dependent shifts in the Raman spectrum as a result of phonon confinement. V C 2013 AIP Publishing LLC. [] 134310-6 _ I. Do gan and M. C. M. van de Sanden
doi:10.1063/1.4824178 fatcat:4njt5kzvmffutnml63ry3nnf5e