MATERIALS BASED ON SILVER NANOPARTICLES WITH HIGH ANTIMICROBIAL ACTIVITY. METHOD OF PREPARATION - Banco de Patentes
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MATERIALS BASED ON SILVER NANOPARTICLES WITH HIGH ANTIMICROBIAL ACTIVITY. METHOD OF PREPARATION
This invention, which is the subject of the patent presented jointly by researchers from the Universidade Federal de São Carlos (UFSCar), the Universitat Jaume I de Castelló (UJI) and Universidade Estadual de Campinas (UNICAMP) addresses the formation of silver nanoparticles from a silver salt (Figure 1), where a reduction process generates a composite material formed by this silver salt with segregation of nanoparticles of metallic silver on its surface. This segregation is achieved by irradiating the precursor material with a high-energy electron beam (generated in an electron microscope) or by irradiation with a femtosecond laser (Figure 2).
In this way, the antimicrobial activity of the treated salt improves remarkably with respect to the non-irradiated salt. The precursor silver salt is an α-silver tungstate with a cubic morphology synthesised by a precipitation reaction modified by a surfactant and is the one that offers the greatest antimicrobial activity.
The holders of such rights are: UFSCar, UJI and UNICAMP. This invention is protected by means of the Brazilian patent with reference BR 10 2019 015473 0 and application date 26/07/2019.
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