From Oxidized PrNi0.9Al0.1O3 to Reduced PrNi0.9Al0.1O2+δ Perovskite Nickelates: Stabilization of Infinite-Layer Specimens with Monovalent Ni in the Bulk Polycrystalline Form 来源：ACS PublicationsRecently, a new class of high-temperature superconductors, RNiO2 (where R represents rare-earth elements) with infinite-layer (IL) structure, has been identified. They possess the same structural framework as the renowned high-Tc cuprates but with nickel replacing copper as the central element. In this study, we successfully synthesized infinite-layer samples of PrNi0.9Al0.1O2+δ in the bulk polycrys...
Release time:
2025
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07
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25
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Rational Synthesis of Rare-Earth-Doped Co3O4 Nanostructures: Insights into Eu3+-Induced Oxygen Vacancies for Enhanced Battery-Type Hybrid Supercapacitor Performance 来源：ACS PublicationsCobalt oxide (Co3O4) has emerged as a promising electrode material for energy storage due to its high theoretical capacity. However, its practical application is limited by poor electrical conductivity, sluggish charge transfer kinetics, and restricted electrochemical activity. To overcome these limitations, rare-earth (RE) doping has been explored as a strategy to tailor the physicochemical properties...
Release time:
2025
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07
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24
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Strong Emission Enhancement via Dual-Wavelength Coexcitation in YbTm-Doped Upconverting Nanoparticles for Near-Infrared and Subdiffraction Imaging来源：ACS PublicationsUpconversion (UC) emission in lanthanide-doped nanoparticles is typically excited by a single near-infrared (NIR) wavelength, most commonly around 975 nm, which promotes ground-state absorption by Yb3+ sensitizer ions and subsequent energy transfer to activator ions such as Tm3+. However, due to the presence of multiple long-lived excited states in lanthanide ions, additional excitation wavelengths can activate or modulate further ...
Release time:
2025
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07
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23
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Magnetic Properties and Large Second-Harmonic Generation Response of a Chiral Ternary Chalcogenide: Eu2SiSe4来源：ACS PublicationsEu(II)-containing chalcogenides are an emerging class of materials that are of great interest due to their high optical activity and intriguing magnetism. Here, we synthesized Eu2SiSe4 as red-colored single crystals and characterized its structure with single-crystal X-ray diffraction, confirming the reported chiral monoclinic P21 symmetry at room temperature. The crystal structure of Eu2SiSe4 comprises distorted SiSe4 tetrahedral units and charge-balancing Eu(II) cati...
Release time:
2025
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07
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23
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