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Pulsed laser reshaping and fragmentation of upconversion nanoparticles — from hexagonal prisms to 1D nanorods through “Medusa”-like structures
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01.04.2021 |
Sajti L.
Karimov D.N.
Rocheva V.V.
Arkharova N.A.
Khaydukov K.V.
Lebedev O.I.
Voloshin A.E.
Generalova A.N.
Chichkov B.N.
Khaydukov E.V.
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Nano Research |
10.1007/s12274-020-3163-4 |
0 |
Ссылка
© 2020, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature. One dimensional (1D) nanostructures attract considerable attention, enabling a broad application owing to their unique properties. However, the precise mechanism of 1D morphology attainment remains a matter of debate. In this study, ultrafast picosecond (ps) laser-induced treatment on upconversion nanoparticles (UCNPs) is offered as a tool for 1D-nanostructures formation. Fragmentation, reshaping through recrystallization process and bioadaptation of initially hydrophobic (β-Na1.5Y1.5F6: Yb3+, Tm3+/β-Na1.5Y1.5F6) core/shell nanoparticles by means of one-step laser treatment in water are demonstrated. “True” 1D nanostructures through “Medusa”-like structures can be obtained, maintaining anti-Stokes luminescence functionalities. A matter of the one-dimensional UCNPs based on direction of energy migration processes is debated. The proposed laser treatment approach is suitable for fast UCNP surface modification and nano-to-nano transformation, that open unique opportunities to expand UCNP applications in industry and biomedicine. [Figure not available: see fulltext.].
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