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 ...
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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...
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2025
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07
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23
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Synthesis and Characterization of Sm3+/Yb3+ Codoped Oxychloride Tellurite Glasses for Solar Cell Enhancement via Energy Conversion 来源：ACS PublicationsThis study presents the synthesis and characterization of novel oxychloride tellurite glasses codoped with Sm3+/Yb3+. These materials were investigated for their potential applications as spectral converters to enhance the efficiency of silica-based solar cells. Optical spectroscopy revealed the successful incorporation of both rare-earth ions in the glass matrix. It was observed that with the increase of Yb3+ ion concentration, the lifetime...
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2025
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07
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来源：ACS PublicationsWater electrolysis has emerged as a promising pathway for sustainable energy production, highlighting the need for innovative nonprecious bimetallic nanocatalysts to enhance overall reaction efficiency and kinetics. In this study, we report the synthesis and bifunctional electrocatalytic performance of nanoscale nickel lanthanum telluride nanofibers (NiLaTe NFs) for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). These nanostructured fibers were fabricated via a simple oven-based wet chemical route, enabling binder-free in situ growth on N...
Release time:
2025
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07
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18
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