Temperature dependent radiative and non-radiative recombination dynamics in CdSe-CdTe and CdTe-CdSe type II hetero nanoplatelets.

We investigate the temperature-dependent decay kinetics of type II CdSe-CdTe and CdTe-CdSe core-lateral shell nanoplatelets. From a kinetic analysis of the photoluminescence (PL) decay and a measurement of the temperature dependent quantum yield we deduce the temperature dependence of the non-radiative and radiative lifetimes of hetero nanoplates. In line with the predictions of the giant oscillator strength effect in 2D we observe a strong increase of the radiative lifetime with temperature.

DNA-directed assembly of supramolecular fluorescent protein energy transfer systems.

Fluorescent proteins with a wide variety of physicochemical properties have evolved in the past few years. The use of these proteins for applications in biomolecular nanosciences requires their precise positioning at the nanometer length scale. To address this challenge, we report here on the self-organization of DNA-tagged fluorescent probes to construct a set of photofunctional supramolecular complexes which include the enhanced yellow fluorescent protein (EYFP).