1. TiO2 Coated Fluoride Nanoparticles for Dental Multimodal Optical Imaging

    TiO2 Coated Fluoride Nanoparticles for Dental Multimodal Optical Imaging

    Core-shell nanostructures associated with photonics techniques have found innumerous applications in diagnostics and therapy. In this work, we introduce a novel core-shell nanostructure design that serves as a multimodal optical imaging contrast agent for dental adhesion evaluation. This nanostructure consists of a rare-earth doped (NaYF 4 :Yb 60%,Tm 0.5%)/NaYF 4 particle as the core (hexagonal prism, ~51 nm base side length), and the highly refractive TiO 2 material as the shell (~thickness of 15 nm). We show that the TiO 2 shell provides enhanced contrast for Optical Coherence Tomography (OCT), while the rare-earth doped core upconverts excitation ...

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