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

• 作者: Laszlo Sajti Denis N.Karimov Vasilina V.Rocheva Nataliya A.Arkharova Kirill V.Khaydukov Oleg I.Lebedev Alexey E.Voloshin Alla N.Generalova Boris N.Chichkov Evgeny V.Khaydukov
• 来源期刊: 纳米研究（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Research Articles
• 页码范围: 1141-1148
• 页数: 8页
• 语种: 英文

摘要

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"-Iike 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.