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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2025-08-21 0:30 |
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Conference: Bucharest University Faculty of Physics 2025 Meeting
Section: Physics and Technology of Renewable and Alternative Energy Sources
Title:
Biophysical characterization of silver phyto-nano particles obtained by eco-synthesis
Authors:
Bogdan Ciprian MITREA (1), Georgiana Alexandra GRIGORE(2,3), Mădălina Diana GĂBOREANU (2), Bogdan Ionuț BITA (4), Cornelia NICHITA (1, 5), Marcela-Elisabeta BARBINTA-PATRASCU (4), Ioan STAMATIN (1)
*
Affiliation:
1) University of Bucharest, Faculty of Physics, ICUB, CTT 3Nano-SAE Research Center, MG-38, 405 Atomistilor Street, 077125, Magurele, Romania
2) University of Bucharest, Faculty of Biology, ICUB, Splaiul Independenței 91-95, 050095 Bucharest, Romania
3 National Institute of Research and Development for Biological Sciences, Splaiul Independenței 296, 060031 Bucharest, Romania
4) Department of Electricity, Solid-State Physics and Biophysics, Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125 Magurele, Romania
5) National Institute for Chemical – Pharmaceutical Research and Development, 112 Vitan Avenue, 031299, Bucharest, Romania
E-mail
cornelia.nichita@unibuc.ro, cornelia@3nanosae.org
Keywords:
silver nano particles, eco-syntesis, biophysical characteristics
Abstract:
Silver phyto-nanoparticles (AgNPs) synthesized through eco-friendly, plant-mediated methods (often termed "green synthesis" or "phytosynthesis") have gained significant attention due to their biocompatibility, cost-effectiveness, and reduced environmental impact compared to chemical or physical synthesis methods [1]. The biophysical characteristics such as size, shape, stability, surface chemistry, and functional properties of AgNPs play a key role for applications in biomedical (antimicrobial), and environmental fields. In this sense, the present work describes the eco-synthesis of silver nanoparticles, followed by the biophysical characterization. AgNPs were phytosynthesized by using an aqueous extract of Geranium robertianum L. both as reducing and stabilizing agent to convert silver ions from silver nitrate solution (AgNO3) into metallic nanoparticles. The appearance of surface plasmon resonance (SPR) band in the UV-Vis absorption spectrum at 437 nm, confirmed the phytosynthesis of AgNPs. In addition, DLS results showed that the particle ydrodynamic size of AgNPs varied in the range of 35-69 nm. The zeta potential measurements highlighted that the obtained metallic nano particles have good physical stability.
References:
1. M.-E. Barbinta-Patrascu, C. Nichita, M. Enculescu, V.A Maraloiu, M. Bacalum, C Ungureanu, C. C. Negrila, I. Zgura. International Journal of Molecular Sciences, 2024, 25, 11929.
Acknowledgement:
This work was supported by a grant of the Ministry of Research, Innovation and Digitization, CCCDI -UEFISCDI, project number 31PED⁄2025, Eco-innovative novel phyto-derived 3D hybrid bioarchitectures for a better life (ECOPHYTO), PN-IV-P7-7.1-PED-2024-0690, within PNCDI IV.
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