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Article

Sono-Biosynthesis and Characterization of AuNPs from Danube Delta Nymphaea alba Root Extracts and Their Biological Properties

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Faculty of Sciences and Environment, Department of Chemistry Physical and Environment, “Dunărea de Jos” University of Galati, 111 Domnească Street, 800201 Galati, Romania
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Research Center for Environmental Protection and Waste Management, University of Bucharest, 91-95 Splaiul Independentei, 050095 Bucharest, Romania
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Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela, Portugal
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Departamento de Engenharia e Ciências Nucleares (DECN), Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela, Portugal
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Department of Bioengineering, iBB-Institute of Bioengineering and Biosciences, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal
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Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Campus Tecnológico e Nuclear, Estrada Nacional, Estrada Nacional 10, Km 139.7, 2695-066 Bobadela, Portugal
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Department of Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90-92 Soseaua Panduri, 050663 Bucharest, Romania
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Authors to whom correspondence should be addressed.
Academic Editor: Ricardo J. B. Pinto
Nanomaterials 2021, 11(6), 1562; https://doi.org/10.3390/nano11061562
Received: 12 May 2021 / Revised: 10 June 2021 / Accepted: 11 June 2021 / Published: 14 June 2021
(This article belongs to the Special Issue Green Biosynthesis of Nanostructures and Their Applications)
Root extracts from Danube Delta Nymphaea alba were used to prepare gold nanoparticles (AuNPRn) by reducing HAuCl4 at different pHs (6.4–8.4) using ultrasonic irradiation: an easy, cheap, eco-friendly and green approach. Their antibacterial and anticancer activities were evaluated against Staphylococcus aureus and Escherichia coli, and A2780 ovarian cancer cells, respectively. The AuNPRn were characterized concerning their phytoconstituents (polyphenols, flavonoids and condensed tannins) and gold content. All of the nanoparticles were negatively charged. AuNPRn exhibited a hydrodynamic size distribution ranging from 32 nm to 280 nm, with the larger nanoparticles being obtained with an Au/root extract ratio of 0.56, pH 7 and 10 min of sonication (AuNPR1), whereas the smallest were obtained with an Au/root extract ratio of 0.24, pH 7.8 and 40 min of sonication (AuNPR4). The TEM/SEM images showed that the AuNPRn had different shapes. The ATR-FTIR indicated that AuNPRn interact mainly with hydroxyl groups present in the polyphenol compounds, which also confirm their high antioxidant capacity, except for AuNPR2 obtained at pH 6.4. Among the AuNPRn, the smallest ones exhibited enhanced antimicrobial and anticancer activities. View Full-Text
Keywords: gold nanoparticles; Nymphaea alba; sonochemistry; biosynthesis; antimicrobial activity; antitumor activity; antioxidant compounds gold nanoparticles; Nymphaea alba; sonochemistry; biosynthesis; antimicrobial activity; antitumor activity; antioxidant compounds
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MDPI and ACS Style

Cudalbeanu, M.; Peitinho, D.; Silva, F.; Marques, R.; Pinheiro, T.; Ferreira, A.C.; Marques, F.; Paulo, A.; Soeiro, C.F.; Sousa, S.A.; Leitão, J.H.; Tăbăcaru, A.; Avramescu, S.M.; Dinica, R.M.; Campello, M.P.C. Sono-Biosynthesis and Characterization of AuNPs from Danube Delta Nymphaea alba Root Extracts and Their Biological Properties. Nanomaterials 2021, 11, 1562. https://doi.org/10.3390/nano11061562

AMA Style

Cudalbeanu M, Peitinho D, Silva F, Marques R, Pinheiro T, Ferreira AC, Marques F, Paulo A, Soeiro CF, Sousa SA, Leitão JH, Tăbăcaru A, Avramescu SM, Dinica RM, Campello MPC. Sono-Biosynthesis and Characterization of AuNPs from Danube Delta Nymphaea alba Root Extracts and Their Biological Properties. Nanomaterials. 2021; 11(6):1562. https://doi.org/10.3390/nano11061562

Chicago/Turabian Style

Cudalbeanu, Mihaela, David Peitinho, Francisco Silva, Rosa Marques, Teresa Pinheiro, Ana C. Ferreira, Fernanda Marques, António Paulo, Catarina F. Soeiro, Sílvia A. Sousa, Jorge H. Leitão, Aurel Tăbăcaru, Sorin M. Avramescu, Rodica M. Dinica, and Maria P.C. Campello. 2021. "Sono-Biosynthesis and Characterization of AuNPs from Danube Delta Nymphaea alba Root Extracts and Their Biological Properties" Nanomaterials 11, no. 6: 1562. https://doi.org/10.3390/nano11061562

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