| Autor: |
Barhom H, Machnev AA, Noskov RE, Goncharenko A; Research Institute of Influenza , Ministry of Healthcare of the Russian Federation , Prof. Popova str. 15/17 , St. Petersburg 197376 , Russia.; Peter The Great St. Petersburg Polytechnic University , Polytechnicheskaya str. 29 , St. Petersburg 195251 , Russia., Gurvitz EA; Faculty of Physics and Engineering , ITMO University , Lomonosova 9 , St. Petersburg 191002 , Russia., Timin AS; Peter The Great St. Petersburg Polytechnic University , Polytechnicheskaya str. 29 , St. Petersburg 195251 , Russia.; Research School of Chemical and Biomedical Engineering , National Research Tomsk Polytechnic University , Lenin Avenue 30 , 634050 Tomsk , Russia., Shkoldin VA; Faculty of Physics and Engineering , ITMO University , Lomonosova 9 , St. Petersburg 191002 , Russia.; St. Petersburg Academic University , St. Petersburg 194021 , Russia., Koniakhin SV; St. Petersburg Academic University , St. Petersburg 194021 , Russia.; Institut Pascal, PHOTON-N2 , Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut Pascal , F-63000 Clermont-Ferrand , France., Koval OY; St. Petersburg Academic University , St. Petersburg 194021 , Russia., Zyuzin MV; Faculty of Physics and Engineering , ITMO University , Lomonosova 9 , St. Petersburg 191002 , Russia., Shalin AS; Faculty of Physics and Engineering , ITMO University , Lomonosova 9 , St. Petersburg 191002 , Russia., Shishkin II, Ginzburg P; Center for Photonics and 2D Materials , Moscow Institute of Physics and Technology , Dolgoprudny , 141700 Russia. |
| Abstrakt: |
Being the polymorphs of calcium carbonate (CaCO 3 ), vaterite and calcite have attracted a great deal of attention as promising biomaterials for drug delivery and tissue engineering applications. Furthermore, they are important biogenic minerals, enabling living organisms to reach specific functions. In nature, vaterite and calcite monocrystals typically form self-assembled polycrystal micro- and nanoparticles, also referred to as spherulites. Here, we demonstrate that alpine plants belonging to the Saxifraga genus can tailor light scattering channels and utilize multipole interference effect to improve light collection efficiency via producing CaCO 3 polycrystal nanoparticles on the margins of their leaves. To provide a clear physical background behind this concept, we study optical properties of artificially synthesized vaterite nanospherulites and reveal the phenomenon of directional light scattering. Dark-field spectroscopy measurements are supported by a comprehensive numerical analysis, accounting for the complex microstructure of particles. We demonstrate the appearance of generalized Kerker condition, where several higher order multipoles interfere constructively in the forward direction, governing the interaction phenomenon. As a result, highly directive forward light scattering from vaterite nanospherulites is observed in the entire visible range. Furthermore, ex vivo studies of microstructure and optical properties of leaves for the alpine plants Saxifraga " Southside Seedling " and Saxifraga Paniculata Ria are performed and underline the importance of the Kerker effect for these living organisms. Our results pave the way for a bioinspired strategy of efficient light collection by self-assembled polycrystal CaCO 3 nanoparticles via tailoring light propagation directly to the photosynthetic tissue with minimal losses to undesired scattering channels. |
