Lanthanide Nanocrystals: Colloidal Tm3+/Yb3+-Doped LiYF4 Nanocrystals: Multiple Luminescence Spanning the UV to NIR Regions via Low-Energy Excitation (Adv. Mater. 40/2009)



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LiYF4 nanoparticles co-doped with thulium and ytterbium ions show multiple emissions in the region covering the ultraviolet to the near-infrared following excitation with low-energy radiation via a multiphoton process known as upconversion, in work reported by John Capobianco and co-workers on p. 4025. These versatile diamond-shaped nanoparticles have been identified as candidates for potential integration in various applications including cell labeling and imaging, solution-based fast scintillation, as well as anti-counterfeiting.