Our work on Cu2-xTe nanocrystals published in ACS Nano

28.05.2013

Our work on the shape-controlled preparation, optical characterization and modeling of vacancy-doped Cu2-xTe nanocrystals has been published in ACS Nano. In this manuscript we show that Cu2-xTe spheres, rods and tetrapods show pronounced plasmon bands in the NIR that cannot be appropriately described with a Drude-like dielectric function. Instead, a Lorentz model of localized quantum oscillators describes all three morphologies reasonably well, suggesting that the effect of charge carrier localization in the valence band of Cu2-xTe nanocrystals may be a non-negligible effect. Similar observations for Cu2-xS and Cu2-xSe NCs suggest that the effect of localization of holes can be a common property for the whole class of copper chalcogenide NCs.