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 1 D-nanostructures formation.Fragmentation,reshaping through recrystallization process and bioadaptation of initially hydrophobic(β-Na_(1.5)Y_(1.5_)F_(6):Yb^(3+),Tm^(3+)/β-Na_(1.5)Y_(1.5_)F_(6))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.
基金
the Ministry of Science and Higher Education within the State assignment FSRC《Crystallography and Photonics》RAS in part of《UCNP synthesis》,by the Russian Foundation for Basic Research according to the research projects No 18-29-20064 in the part of《PL analysis》and Ns 20-32-70174 in the part o f《complex structures analysis》,by the Russian Science Foundation project No18-79-10198 in the part of《UCNP analysis》.BC acknowledges financial support from Lower Saxony through“Quanten und Nanometrologie”project(QUANOMET)and DFG Cluster of Excellence PhoenixD(EXC 2122,Project ID 390833453).
