Other than Raman spectroscopy, is there any other experiment available for the direct evidence of phonon confinement or selective phonon modes in silicon nanocrystals?
if you want to consider the techiques apart of optical measurements, From the common considerations they might be photon - spectrum dependent effects. As electron transport measurements (as electrophonon resonanse) are hardly applicable for zero-dimensional systems as quantum dots, the other integral effects can be used. For example, specific heat temperature dependence should differ for the bulk and nanocrystal Si.
Dear Prof. Vasil’evskii, thank you for your valuable suggestion.
Actually, for my system the silicon nanocrystals are dispersed in colloids. I have no option for charge transport measurements. Particularly, I am looking for the experimental evidance for the prsence of different discrete phonon modes (as example TO, TA etc.) in the system, most probably by any optical measurements.
Raman spectroscopy has been used extensively to study the effect of confinement on phonon modes in silicon nanocrystals. You can find representative articles with a quick google search using terms such as: "raman phonon silicon nanocrystal"
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