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Tunable Near Infrared to Ultraviolet Upconversion Luminescence Enhancement in (α-NaYF4:Yb,Tm)/CaF2 Core/Shell Nanoparticles for In situ Real-time Recorded Biocompatible Photoactivation

Authors

  • Jie Shen,

    1. Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Guanying Chen,

    1. Institute for Lasers, Photonics, and Biophotonics, Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, USA
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Tymish Y. Ohulchanskyy,

    1. Institute for Lasers, Photonics, and Biophotonics, Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, USA
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  • Samuel J. Kesseli,

    1. Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA
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  • Steven Buchholz,

    1. Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA
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  • Zhipeng Li,

    1. Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina, 27599, USA
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  • Paras N. Prasad,

    1. Institute for Lasers, Photonics, and Biophotonics, Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, USA
    2. Department of Chemistry, Korea University, Seoul 136-701, Korea
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  • Gang Han

    Corresponding author
    1. Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA
    • Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA.
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Abstract

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A family of upconverting nanoparticles (UCNPs) with a tunable UV enhancement is developed via a facile approach. The design leads to a maximum 9-fold enhancement in comparison with known optimal β-phase core/shell UCNPs in water. A highly effective and rapid in situ real-time live-cell photoactivation is recorded for the first time with such nanoparticles.

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