2born (2born) wrote,

Эффект Керкера в жизни растений

Насколько я понимаю, эффект Керкера - это резкая анизотропия в рассеянии света объектом, обладающим одновременно электрическим и магнитным дипольными моментами. И вот:

Kerker effect in Biomineral Calcium Carbonate Nanospherulites allows alpine plants from the Saxifraga genus to increase light collection efficiency

Being the polymorphs of calcium carbonate (CaCO3), vaterite and calcite have attracted a great deal of attention as promising biomaterials for drug delivery and tissue engineering. 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 nano-particles, also referred to as spherulites. Here, we demonstrate that alpine plants belonging to the Saxifraga genus can use Kerker effect to improve light collection efficiency via producing CaCO3 polycrystal nanoparticles on the margins of their leaves. To provide clear physical background behind our concept, we study light scattering from 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 generalized Kerker condition, where several higher order multipoles interfere constructively in the forward direction. As a result, highly directive forward light scattering from vaterite nanospherulites is observed in the entire visible range. Also, we present ex vivo study of microstructure and optical properties of leaves for the alpine plants Saxifraga "Southside Seedling" and Saxifraga Paniculata Ria and show performance of Kerker effect for these living organisms. Our results pave the way for a bioinspired strategy of efficient light collection by self-assembled polycrystal CaCO3 nanoparticles via engineering of light propagation directly to the photosynthetic tissue with minimized losses on backward scattering due to the generalized Kerker effect.

Кроме того, гуглеж привел вот к такой открытой статейке в Phys.Rev.X:

Optomechanical Kerker Effect: https://journals.aps.org/prx/abstract/10.1103/PhysRevX.9.011008
Tags: Мегаучебник или Что я читал и похвалил, наука, разгребая arXiv'ы, растения

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