A notably higher prevalence of dementia and AD was found in rural areas than in urban ones, and education might be an important reason for the urban-rural differences.

The prevalence of MCI in elderly Chinese is higher in rural than in urban areas. Vascular-related MCI (MCI-CVD and MCI-VRF) was most common.

For realizing scalable solar hydrogen synthesis, the development of visible-light-absorbing photocatalysts capable of overall water splitting is essential. Metal sulfides can capture visible light efficiently; however, their utilization in water splitting has long been plagued by the poor resilience against hole oxidation. Herein, we report that the ZnIn 2 S 4 monolayers with dual defects (Ag dopants and nanoholes) accessed via cation exchange display stoichiometric H 2 and O 2 evolution in pure water under visible light irradiation. In-depth characterization and modeling disclose that the dual-defect structure endows the ZnIn 2 S 4 monolayers with optimized light absorption and carrier dynamics. More significantly, the dual defects cooperatively function as active sites for water oxidation (Ag dopants) and reduction (nanoholes), thus leading to steady performance in photocatalytic overall water splitting without the assistance of cocatalysts. This work demonstrates a feasible way for fulfilling "all-in-one" photocatalyst design and manifests its great potential in addressing the stability issues associated with sulfide-based photocatalysts.

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Here we show a novel strategy for tailoring the synergistic electrical properties of metal@semiconductor hybrid nanocrystals (HNCs) based on cation exchange-enabled electronic doping.

A feasible laser sensitization strategy enables the realization of emission enhancement and flexible color tuning in Gd2O3:Yb3+,Er3+ particles. Moreover, these materials provide a convenient route for high security anti-counterfeiting applications.

Au@SnS and Au@SnS core-shell hybrid nanocrystals (HNCs) were respectively accessed via an aqueous cation exchange-mediated growth strategy by using different phosphine ligands. The choice of proper ligands during synthesis is imperative to optimize the photoelectrochemical performance of these previously hardly accessible HNCs that manifest compelling plasmon-exciton interactions.

Doping Ga3+ ion are favored to enhance the UC luminescence intensity in Yb3+/Tm3+ co-doped ZnO nanocrystals.