Memories in the photoluminescence intermittency of single cesium lead bromide nanocrystals

Positive correlation between successive on-times is a signature of memory in the photoluminescence intermittency of single CsPbBr3 nanocrystals.

Gray State Dynamics in the Blinking of Single Type I Colloidal Quantum Dots

We analyze the photoluminescence intermittency (blinking) of single colloidal CdSe/ZnS quantum dots (QDs). Two distinct emission levels, a bright on-state and a low-intensity gray state, correspond to monoexponential decay times of 58[Formula: see text]ns and 4[Formula: see text]ns, respectively. The ratio gray/on states increases upon increasing excitation intensity. Conversely, the gray/on level intensity ratio increases upon coupling to a plasmonic nanostructure, while the states maintain their monoexponential character. Corroborated by data from a CdSeTe/ZnS QD, our results demonstrate that type I QDs can indeed show a gray (rather than completely dark) emission level with a distinct monoexponential decay, a point that is discussed controversially in the literature.

Crystalline nanoscale assembly of gold clusters for reversible storage and sensing of CO2via modulation of photoluminescence intermittency

We report that zinc mediated crystalline nanoscale assemblies of atomic gold nanoclusters (NCs) were able to reversibly store gaseous carbon dioxide with adsorption capacity of 1.79 mM g−1 at 20 °C and 20 bar.