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New paper: Quantification of Material Gradients in Core/Shell Nanocrystals

In this paper we quantify how steeply the material changes at the interface of graded core/shell nanocrystals. By using extended x-ray absorption fine structure spectroscopy we determine the coordination environment of one of the constituent ions. We show that cation diffusion is already strong at comparably low synthesis temperatures. At higher temperatures an ordered superlattice forms, which has not been reported before for these systems.

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Posterpreis für Danja Fischli

Danja Fischli hat auf der NaNaX 9 in Hamburg den ACS Nano Posterpreis für ihr Poster mit dem Titel "Reaction Intermediates Influence Anisotropic Growth in Semiconductor Heterostructures" erhalten.

New paper: Switchable Dissociation of Excitons bound at Strained CdTe/CdS Interfaces

In this paper we demonstrate CdSe/CdS seeded nanorods with a single CdTe tip at one end, which can be switched between a quickly deactivating off state and an on state that provides a long-lived electron for photo-catalysis or photovoltaics. Three properties are shown to contribute to the switchable exciton localisation in a synergistic manner: lattice distortion at the CdTe/CdS interface, Coulomb interaction, and size quantisation of the nanorods. The CdSe seed acts as a reporter for...

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