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Nano Research

Article Title

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

Authors

Laszlo Sajti, AIT Austrian Institute of Technology GmbH, Wiener Neustadt, 2700, Austria
Denis N. Karimov, Federal Scientific Research Centre "Crystallography and Photonics" Russian Academy of Sciences, Moscow, 119333, Russia
Vasilina V. Rocheva, Federal Scientific Research Centre "Crystallography and Photonics" Russian Academy of Sciences, Moscow, 119333, Russia
Nataliya A. Arkharova, Federal Scientific Research Centre "Crystallography and Photonics" Russian Academy of Sciences, Moscow, 119333, Russia
Kirill V. Khaydukov, Federal Scientific Research Centre "Crystallography and Photonics" Russian Academy of Sciences, Moscow, 119333, Russia
Oleg I. Lebedev, Laboratoire CRISMAT, UMR6508, CNRS-ENSIACEN, Universite Caen, Caen, 14050, France
Alexey E. Voloshin, Federal Scientific Research Centre "Crystallography and Photonics" Russian Academy of Sciences, Moscow, 119333, Russia
Alla N. Generalova, Federal Scientific Research Centre "Crystallography and Photonics" Russian Academy of Sciences, Moscow, 119333, Russia;Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Moscow 117997, Russia
Boris N. Chichkov, Institut für Quantenoptik, Leibniz Universität Hannover, Hannover, 30167, Germany
Evgeny V. Khaydukov, Federal Scientific Research Centre "Crystallography and Photonics" Russian Academy of Sciences, Moscow, 119333, Russia;Center of Biomedical Engineering, Institute of Molecular Medicine Sechenov First Moscow State Medical University, Moscow, 119991, Russia

Keywords

upconversion nanoparticles, fluoride crystals, upconversion nanorods, one-dimensional (1D) structures, laser-induced reshaping

Abstract

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.

Publisher

Tsinghua University Press

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