Size dependent absorption anisotropy measurements of CdSe nanocrystals: Symmetry assignments for the lowest electronic states

Abstract

Absorption anisotropy measurements reveal the symmetry of the lowest electronic state in CdSe nanocrystals switches from E to A with decreasing nanocrystal diameter. This size dependence originates from a competition between the intrinsic wurtzite crystal field and the nonspherical shape of the nanocrystal.