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Open AccessArticle

The Effect of the Antioxidant Activity of Plant Extracts on the Properties of Gold Nanoparticles

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Department of Physics and Chemistry, Research Center of Sensory Technologies, Ural State University of Economics, 8Marta St. 62, 620144 Yekaterinburg, Russia
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Department of Analytical Chemistry, Ural Federal University, Mira St. 19, 620002 Yekaterinburg, Russia
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(12), 1655; https://doi.org/10.3390/nano9121655
Received: 1 November 2019 / Revised: 15 November 2019 / Accepted: 17 November 2019 / Published: 21 November 2019
Synthesis of gold nanoparticles (phyto-AuNPs) with the use of leaf extracts (phytosynthesis) is based on the concept of Green Chemistry. The present study is conducted to discuss how antioxidant activity (AOA) of extracts from plant leaves impacts on the kinetics of phytosynthesis, the size of the formed nanoparticles, and the stability of their nanosuspensions. Results show that the formation rate of phyto-AuNPs suspensions accelerate due to the increase in the AOA of the extracts. Accompanying the use of transmission electron microscopy (TEM), UV-Vis-spectrophotometry and dynamic light scattering (DLS), it also has been found that higher AOA of the extracts leads to a decrease in the size of phyto-AuNPs, an increase in the fraction of small (d ≤ 5 nm), and a decrease in the fraction of large (d ≥ 31–50 nm) phyto-AuNPs, as well as an increase in the zeta potential in absolute value. Phyto-AuNPs suspensions synthesized with the use of extracts are more resistant to destabilizing electrolytes and ultrasound, as compared to suspensions synthesized using sodium citrate. Thus, the AOA of the extract is an important parameter for controlling phytosynthesis and predicting the properties of phyto-AuNPs. The proposed approach can be applied to the targeted selection of plant extract that will be used for synthesizing nanoparticles with desired properties.
Keywords: leaf extracts; gold nanoparticles; green synthesis; phytosynthesis; antioxidant activity leaf extracts; gold nanoparticles; green synthesis; phytosynthesis; antioxidant activity
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MDPI and ACS Style

Stozhko, N.Y.; Bukharinova, M.A.; Khamzina, E.I.; Tarasov, A.V.; Vidrevich, M.B.; Brainina, K.Z. The Effect of the Antioxidant Activity of Plant Extracts on the Properties of Gold Nanoparticles. Nanomaterials 2019, 9, 1655.

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