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It is absolutely imperative for development of material science to adjust upconversion luminescence (UCL) properties of highly doped upconversion nanoparticles (UCNPs) with special optical properties and prominent application prospects. In this work, featuring NaHoF4@NaYbF4 (Ho@Yb) structures, sub‐30 nm core–multishell UCNPs are synthesized with a small NaHoF4 core and varied Gd3+/Yb3+ coexisting...
Near‐infrared (NIR) light is highly suitable for studying biological systems due to its minimal scattering and lack of background fluorescence excitation, resulting in high signal‐to‐noise ratios. By combining NIR light with lanthanide‐based upconversion nanoparticles (UCNPs), upconversion is used to generate UV or visible light within tissue. This remarkable property has gained significant research...
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