Eugenia uniflora L. Silver and Gold Nanoparticle Synthesis, Characterization, and Evaluation of the Photoreduction Process in Antimicrobial Activities

Author(s)

Franzolin, Marcia Regina ; Courrol, Daniella dos Santos ; Barreto, Susana de Souza ; Courrol, Lilia Coronato

• Document type: Journal article
• Source: MICROORGANISMS; v. 10, n. 5, p. 13-pg., 2022-05-01.

Abstract

Eugenia uniflora linnaeus, known as Brazilian cherry, is widely distributed in Brazil, Argentina, Uruguay, and Paraguay. E. uniflora L. extracts contain phenolic compounds, such as flavonoids, tannins, triterpenes, and sesquiterpenes. The antimicrobial action of essential oils has been attributed to their compositions of bioactive compounds, such as sesquiterpenes. In this paper, the fruit extract of E. uniflora was used to synthesize silver and gold nanoparticles. The nanoparticles were characterized by UV-Vis, transmission electron microscopy, elemental analysis, FTIR, and Zeta potential measurement. The silver and gold nanoparticles prepared with fruit extracts presented sizes of similar to 32 nm and 11 nm (diameter), respectively, and Zeta potentials of -22 mV and -14 mV. The antimicrobial tests were performed with Gram-negative and Gram-positive bacteria and Candida albicans. The growth inhibition of EuAgNPs prepared with and without photoreduction showed the important functional groups in the antimicrobial activity. (AU)

• FAPESP's process: 17/23686-6 - Use of fluorescence spectroscopy on detection and control of contamination in food
• Grantee: Lilia Coronato Courrol
• Support Opportunities: Regular Research Grants
• FAPESP's process: 19/13291-0 - Evaluation of antimicrobial potential of synthesized gold and silver nanoparticles using aqueous extract of Mimusops coriacea
• Grantee: Marcia Regina Franzolin
• Support Opportunities: Regular Research Grants