Glass Physics and Chemistry. Vol. 48, No. 1, Pages 69-71, 2022

S. V. Mjakin^a^,^b^, *, A. S. Kovalenko^c, G. G. Panova^d, and O. A. Shilova^a^,^c

^aSt. Petersburg State Technological Institute (Technical University), St. Petersburg, 190013 Russia

^bInstitute for Analytical Instrumentation, Russian Academy of Sciences, St. Petersburg, 198095 Russia

^cGrebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, St. Petersburg, 199034 Russia

Abstract—It is shown that the deposition of silica sol shells on the surface of barley seeds based on hydrolyzed tetraethoxysilane with the addition of γ-Fe₂O₃ (maghemite) nanoparticles leads to a nonlinear change in the transparency in the UV region of distilled nonsterile and sterilized water after contact with the treated silica-salt seeds, depending on the concentration of the oxide additive introduced into the silica sol, varying in the range 0.001–10 000 mg/L. A number of correlations are found between the transmittance of the studied water samples and the target indicators of seed germination, which may be due to a change in the permeability and sorption activity of the shell being formed.

Keywords: nanoparticles, silica sols, maghemite, presowing seed treatment, spectrophotometry

Spectrophotometric Study of Interaction with Water of Barley Seeds after Their Colloid Treatment in Silica Sols with γ-Fe2O3 Nanopowders

Spectrophotometric Study of Interaction with Water of Barley Seeds after Their Colloid Treatment in Silica Sols with γ-Fe₂O₃ Nanopowders