We investigate the size dependence of the exciton-LO-phonon coupling strength in colloidal CdSe nanorods coated with an epitaxial ZnS shell. We find an increase in the coupling strength with decreasing nanorod diameter. The growth of a ZnS shell on the nanorod surface much more strongly reduces the exciton-phonon coupling strength than expected from geometry considerations. The determined radius dependence of the Huang-Rhys factor is similar to that observed for spherical CdSe nanocrystals.
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Lange et al. (2008) studied this question.
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