Sol-Gel-Derived Functional Coatings for Pre-Sowing Seed Treatment
Source abstract
Abstract
The superatomic structure of film-forming sols obtained by the acid hydrolysis of tetraethoxysilane (TEOS) in an aqueous medium (free of organic solvents) was studied using the SAXS method. The formation of nanoparticles (NPs) was confirmed in alcohol-free silica sols with both a low (1 vol. %) content of TEOS and a high (10 vol. %) content of TEOS, hydrolyzed in an aqueous-alcoholic medium. A trimodal size distribution was revealed for the resulting NPs, with radii ranging from less than 1 nm to ~11 nm. The volume fraction of NPs tends to grow with increases in TEOS concentration, as well as with the introduction of magnetic NPs of iron oxides into silica sols. The synthesized silica sols and suspensions based on silica sols with FexOy NPs were used for the pre-sowing treatment of white and cauliflower cabbage seeds in order to provide a functional coating on their surfaces, thereby improving seed germination, stimulating their growth in the early stages of development, and suppressing the effect of phytopathogens. The effect of the pre-sowing seed treatment in sol-gel compositions on seed germination and the growth characteristics of plant seedlings is analyzed, including the influence of iron-oxide magnetic NPs’ compositions and concentrations in silica sols.
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Research context
OpenAlex topics: Plant Growth Enhancement Techniques · Polymer-Based Agricultural Enhancements · Diatoms and Algae Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Laboratory of Inorganic Synthesis, Institute of Silicate Chemistry of Russian Academy of Sciences, Saint-Petersburg 199155, Russia
Department of Nanotechnology and Nanomaterials for Radioelectronics, Saint-Petersburg Electrotechnical University “LETI”, Saint-Petersburg 197376, Russia
Agrophysical Research Institute, Saint-Petersburg 195220, Russia
Vavilov Research Institute Plant Genetic Resources, Saint Petersburg 190000, Russia
Center for Collective Use of Scientific Equipment, Voronezh State University, Voronezh 394018, Russia
Petersburg Nuclear Physics Institute Named by B.P. Konstantinov of National Research Centre “Kurchatov Institute”, Gatchina 188300, Russia
Funding
Institute of Silicate Chemistry of the Russian Academy of Sciences · Agrophysical Research Institute
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