Pulsed laser reshaping and fragmentation of upconversion nanoparticles-From hexagonal prisms to 1D nanorods through "Medusa"-like structures - Archive ouverte HAL
Article Dans Une Revue Nano Research Année : 2020

Pulsed laser reshaping and fragmentation of upconversion nanoparticles-From hexagonal prisms to 1D nanorods through "Medusa"-like structures

Résumé

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.

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Dates et versions

hal-03817485 , version 1 (17-10-2022)

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Laszlo Sajti, Denis Karimov, Vasilina Rocheva, Nataliya Arkharova, Kirill Khaydukov, et al.. Pulsed laser reshaping and fragmentation of upconversion nanoparticles-From hexagonal prisms to 1D nanorods through "Medusa"-like structures. Nano Research, 2020, 2021 (14), pp.141-148. ⟨10.1007/s12274-020-3163-4⟩. ⟨hal-03817485⟩
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