Author(s)

Matheus Vinicius de Oliveira Brisola Maciel^1*, Aline da Rosa Almeida¹, Michelle Heck Machado¹, Ana Paula Zapelini de Melo¹, Cleonice Gonçalves da Rosa¹, Daniele Ziglia de Freitas¹, Carolina Montanheiro Noronha¹, Gerson Lopes Teixeira¹, Rafael Dutra de Armas², Pedro Luiz Manique Barreto¹

¹Departamento de Ciência e Tecnologia de Alimentos, Universidade Federal de Santa Catarina, Florianópolis, Brasil.
²Centro Universitário-Católica de Santa Catarina, Joinville, Brasil.

The present investigation details a green synthesis of silver nanoparticles (AgNP) using the essential oil of Syzygium aromaticum L. (clove) as reducing agent, which is a matrix with a high content of eugenol, an important compound for the reducing action of silver nitrate. The synthesis of AgNP was performed at different pH conditions (pH 7, 8, 9 and 10), and was monitored by UV-Vis Spectroscopy, Dynamic Light Scattering (DLS) and Transmission Electron Microscopy. The synthesized nanoparticles presented characteristic Surface Plasmon Resonance bands with maximum absorbance between 405 and 460 nm. The DLS analysis revealed particle sizes from 31 to 72 nm and zeta potential between -30.1 and -50.8 mV indicating good stability against the agglomeration of the particles in solution. The micrographs obtained by TEM showed different particle shapes and a predominance of spherical-shaped nanoparticles, and average size ranging from 27 to 94 nm. The clove-based silver nanoparticles were efficient in controlling the growth of Escherichia coli and Staphylococcus aureus bacteria, and the minimum inhibitory concentration ranged from 60 to 100 μL/mL. This study highlights the feasibility of clove essential oil as an alternative for the synthesis of silver nanoparticles by a simple, inexpensive and eco-friendly method.

Essential Oil, Clove, Eugenol, Silver Nanoparticles, Antibacterial Activity

Maciel, M. , Almeida, A. , Machado, M. , Melo, A. , Rosa, C. , Freitas, D. , Noronha, C. , Teixeira, G. , Armas, R. and Barreto, P. (2019) Syzygium aromaticum L. (Clove) Essential Oil as a Reducing Agent for the Green Synthesis of Silver Nanoparticles. Open Journal of Applied Sciences, 9, 45-54. doi: 10.4236/ojapps.2019.92005.