Confined acoustic phonon energies in 4-13 nm CsPbI3 nanocrystals increase with decreasing size, and comparison with a continuum-elasticity model indicates the nanocrystals are mostly spherical or spheroidal.
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Confined acoustic phonons in CsPbI3 nanocrystals explored by resonant Raman scattering on excitons
Confined acoustic phonon energies in 4-13 nm CsPbI3 nanocrystals increase with decreasing size, and comparison with a continuum-elasticity model indicates the nanocrystals are mostly spherical or spheroidal.