Green synthesis of Fe3O4 magnetic nanoparticles via the aqueous extract of Shanghai white tea and evaluation of its antibacterial activity

In accordance with the increasing importance of the nanotechnology and environmental friendly procedures in fabricating chemicals, we decided to synthesize Fe3O4 magnetic nanoparticles in the room temperature via Shanghai White tea aqueous extract in one pot process utilizing green chemistry principles. To the best of our knowledge, it is for the first time this plant is used for synthesizing nanoparticles. Evaluating its properties and morphology is done using FT-IR, X-ray and SEM. SEM analysis shows that, the average particle size is 40 nm. These green synthesized nanoparticles then used to evaluate the antibacterial effect against the gram-positive and gram-negative bacteria. As results, Listeria monocytogenes and Escherichia coli were effectively inhibited. These NPs are a promising candidate for development of future antibacterial therapies. The nature of biosynthesis and the antibacterial therapies by White tea synthesized Fe3O4 nanoparticles could open the way for further research to design of green synthesis therapeutic agents, particularly nanomedicine, to deal with treatment of infection.

Keywords:

green synthesis , White tea , Fe3O4 nanoparticles , antibacterial , Listeria monocytogenes , Escherichia coli