In Situ Reduction of Ag on Magnetic Nanoparticles with Gallic Acid: Effect of The Synthesis Parameters on Morphology

Abstract

Aim: Synthesis of Fe3O4–Ag composite nanoparticles (NPs) by a new in situ reduction of Ag NPs on the surface of Fe3O4 NPs using gallic acid as a reducing agent. Materials & methods: The influence of process parameters on NP morphology and functionalization was evaluated by means of field-emission scanning/scanning transmission electron microscopy and Fourier-transform IR spectroscopy. Results & conclusion: The synthesis conditions affected the morphology of the obtained NPs, evidence of the formation of polydispersed aggregates, nanoflower-like or nanodumbbell nanocomposites. In particular, well-defined nanodumbbells were obtained in aqueous media, with an NP/gallic acid ratio of 10:1, while the presence of a silica shell did not improve the morphology of Ag NPs nucleated on the Fe3O4 core.

Iron Oxide-Au Magneto-Plasmonic Heterostructures: Advances in Their Eco-Friendly Synthesis

“…A completely green synthesis of composite nanostructures (heterostructures), according to the authors’ knowledge, has not yet been developed. However, in the literature, there are several studies in which at least one of the two nanoparticles or part of the synthesis process has been carried out using a green approach [ 11 , 165 , 166 , 167 , 168 , 169 , 170 , 171 , 172 , 173 , 174 ].…”

“…Concerning the biomedical field, the authors recently proposed a green approach to develop magneto-plasmonic nanoparticles for photothermal therapy, using tannic acid or gallic acid as a green reducing agent [ 11 , 165 , 166 ]. They produced superparamagnetic iron oxide nanoparticles by co-precipitation method and subsequently, they used tannic acid to reduce in situ the Au nanoparticles on the surfaces of the magnetite obtained [ 11 ].…”

Silica nanoparticle conjugation with gallic acid towards enhanced free radical scavenging capacity and activity on osteosarcoma cells in vitro

“…The combination of the redox, prooxidative as well as the radical scavenging potential of GA, coupled with various nano-formulations, opens Please do not adjust margins Please do not adjust margins up to numerous potential applications. [13][14][15][16] For instance, GA has been utilized to enhance the performance of Pt nanoparticlefunctionalized graphene electrodes. 15 Additionally, the creation of GA layers on γ-AlOOH nanoparticle-based surfaces has shown potential in providing antioxidant properties and protecting cellular membranes.…”