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Enhancing Lanthanide-Doped Nanocrystal Upconversion Luminescence Could Improve Bioimaging, Displays

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SINGAPORE, Oct. 11, 2021 — At the National University of Singapore (NUS), researchers amplified upconversion luminescence in protein-size lanthanide-doped nanocrystals. The group reconstructed the surface of the crystal to prevent surface-associated energy loss. Tests showed that the approach enhanced photon upconversion eleven thousand-fold. Highly luminescent lanthanide-doped nanocrystals are desirable for use in biomedical applications and optical imaging. However, a large portion of lanthanide dopants reside on the surface or subsurface layers of the nanocrystal, forming a dark, nonluminescent layer. ...Read full article

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