来源：ACS PublicationsFluorescence spectroscopy is a widely used sensor methodology that analyzes light emitted from a compound or element as it decays from an excited state. This technique is very sensitive and selective, which is ideal to characterize analytes at lower concentrations. Key example targets of significant industry and research interest include rare earth elements (REEs) such as dysprosium (Dy) and europium (Eu). These are widely used in advanced technologies including semiconductors, electric vehicle motors, lasers, and permanent magnets. Identifying new sources and responsible re...
Release time:
2026
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来源：ACS PublicationsColloids, such as iron–humic acid(Fe–HA) colloids, are key vectors for the transport of potentially hazardous elements such as rare earth elements (REEs) due to their strong adsorption capacity and high mobility. These heterogeneous particles vary in size and composition and are highly sensitive to changing biogeochemical conditions (e.g., pH, redox potential). However, their transformation during transport and the resulting impact on contaminant behavior remain underexplored. In this study, batch and column experiments were combined to investigate how Fe–HA colloid heteroge...
Release time:
2026
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06
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来源：ACS PublicationsNanocrystalline CeO2 is a chemically tunable wide-bandgap host lattice of interest for quantum information technologies due to its ability to accommodate optically- and spin-active defects. Here, we investigate CeO2 nanocrystals as hosts for near-infrared-compatible Yb3+ ions as optically active spin quantum bits (qubits). We characterize the as-synthesized Yb3+-doped CeO2 nanocrystals (0.01–10% Yb) by photoluminescence, which reveals short photoluminescence lifetimes dominated by nonradiative decay arising from surface and Ce3+-related defects. Thermal annealing at 700 ...
Release time:
2026
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来源：ACS PublicationsSkyrocketing demand for rare-earth elements makes their isolation and reuse from electronic waste an increasingly attractive alternative to mining. Typically, the capture of individual lanthanides from mixtures requires the iterative design of complex, macrocyclic ligands, a sometimes successful but often laborious process. Here we show that the self-assembly of rare-earth ions with a ditopic ligand, Ld, results in the selective incorporation of smaller lanthanides and gives rise to impressive separation factors. Comparison to a monotopic ligand, Lm, shows that the separatio...
Release time:
2026
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