The optical properties of nanodisperse silica in hydrothermal solutions

Hydrothermal SiO2 Nanopowders: Obtaining Them and Their Characteristics

“…A sufficiently developed application of hydrothermal SiO 2 nanoparticles is the intensification of photosynthesis in chloroplasts of plant cells due to the photoluminescent radiation of SiO 2 nanoparticles. SiO 2 nanoparticles due their optical properties can absorb solar radiation in ultraviolet region with a wave-length of 200 to 360 nm and emit of luminescent radiation in visible region with a wave length of 400 to 500 nm, in which the efficiency to absorb radiation by photosynthetic pigments and carotenoids is high [80][81][82]. An increase in the proportion of photosynthetic pigments of chlorophylls a (62%) and b (79.3%) [82][83][84], as a result, an increase in the growth rate, biochemical and biometric indicators at all stages of plant growth and development, a significant increase crop yields of agricultural plants from 9% to 60% [82][83][84][85], increase of contents of carotenoids-14.5%, B 2 -130%, B 5 -60%, B 6 -230%, B 9 -230% and C-14.4% vitamins [82][83][84] and rising biological activity of raw plant's mass with respect to cultures of Daphnia magna-352% and Paramecium caudatum-90.5% [82][83][84][85][86].…”