The authors measure the temperature dependence of the first absorption feature (dE∕dT) for different sizes of CdSe∕ZnS nanocrystals. In contrast to previous experiments, they find that dE∕dT is experimentally identical for all nanocrystal sizes considered and agrees well with the bulk CdSe value. They show that a first order model that only considers the exciton confinement energy can explain the existing experimental dE∕dT values for both epitaxial quantum dots (InAs, In0.6Ga0.4As, GaAs) and colloidal nanocrystals (CdSe, PbS, PbSe).
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