Pulsed laser reshaping and fragmentation of upconversion nanoparticles — from hexagonal prisms to 1D nanorods through “Medusa”-like structures


  • 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.
Дата публикации:01.04.2021
Журнал: Nano Research
БД: Scopus
Ссылка: Scopus

Аннтотация

© 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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