来源：ACS PublicationsTwo-dimensional field-effect transistors (2D FETs) are promising candidates for next-generation semiconductor technologies, yet their adoption has been limited by the absence of gate dielectrics that simultaneously possess high dielectric constant (κ) and atomically smooth surfaces. Here, we present a heterohalogen polarization engineering strategy to boost the dielectric constants of LaOCl, LaOBr, PrOCl, PrOBr, NdOCl, and NdOBr by markedly improving the ionic and electronic polarizations. For example, F-polarized monolayer LaOCl (0.8 nm) achieves a record-high κ of 36.4 (a ...
Release time:
2026
-
08
-
18
viewed：5
来源：ACS PublicationsTransition-metal selenides have been widely investigated as promising candidates for energy-storage electrodes, benefiting from their intrinsic electronic transport capability and considerable theoretical charge-storage capacity. Despite their advantages, the practical utilization of these materials remains challenging because of sluggish kinetics and poor cycling durability. To overcome these challenges, this study introduced rare-earth Ce into (Ni,Co)Se2 and successfully synthesized Ce-doped (Ni,Co)Se2 nanomaterials. The incorporation of Ce refined the microstructure, resu...
Release time:
2026
-
08
-
17
viewed：2
来源：ACS PublicationsRare earth elements (REEs) are essential for modern electronics and are increasingly entering electronic waste (e-waste) streams. Informal recycling can release REEs into the environment, but their sources, transfer pathways, and retained inventories remain poorly quantified. Here, we combine microscopic particle characterization, neodymium (Nd) isotopes, Bayesian source apportionment, and a Level III steady-state multimedia aquivalence (SMA) model to characterize REE sources, cross-media transport, and retained inventories in Guiyu, China. Spatial clustering of REE concentr...
Release time:
2026
-
08
-
14
viewed：5
来源：ACS PublicationsSurface plasmons modulate rare-earth luminescence via local field enhancement and photothermal effects, yet the synergy-competition between these inherently coupled effects remains to be decoded, impeding precise level-selective control. Herein, we construct a Yb3+, Er3+ upconversion system with different metals (Au/Ag nanoislands) and host morphologies (prism/plate), and combine steady-state spectroscopy, fluorescence lifetime dynamics, and multiphysics simulations to decode their interplay. We unveil pronounced level selectivity: the 2H11/2→4I15/2 transition is dominated b...
Release time:
2026
-
08
-
13
viewed：10