Probing the Structural Degradation of CsPbBr Perovskite Nanocrystals in the Presence of HO and HS: How Weak Interactions and HSAB Matter.

Structural degradation of all inorganic CsPbBr in the presence of moisture is considered as one of its major limitations to use as an active component in various light-harvesting and light-emitting devices. Herein, we used two similar molecules, HO and HS, with similar structures, to follow the decomposition mechanism of CsPbBr perovskite nanocrystals. Interestingly, HO acts as a catalyst for the decomposition of CsPbBr, which is in contrast to HS.

Transport of dissolved nutrients and chlorophyll a in a tropical estuary, southwest coast of India.

Intra-tidal variability in the transport of materials through the Cochin estuary was studied over successive spring and neap tides to estimate the export fluxes of nutrients and chlorophyll a into the adjoining coastal zone. The results showed that there was a substantial increase in the freshwater flow into the estuary following heavy rains (~126 mm) prior to the spring tide observations. The estuary responded accordingly with a relatively larger export through the Cochin inlet during spring tide over neap tide.