Abstract:Phonon, as a momentum carrier, may play an important
role in the
photoluminescence of silicon nanocrystals. However, a systematic experimental
study on phonon dynamics in spatially confined silicon systems remains
limited. We used inelastic neutron scattering to investigate particle
size, oxidation, and temperature effects on phonon dynamics of silicon
nanocrystals by measuring phonon density of states of 12 and 50 nm
silicon nanocrystals with several oxidation levels at different temperatures.
We showed that … Show more
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