Biosynthesis and characterization of copper nanoparticles from Stenotrophomonas maltophilia and its effect on plant pathogens and pesticide degradation

Abstract

Nanotechnology has gained popularity in recent years despite its early stage of development due to its capability of modulating metals into their Nano size, which leads to changes in the chemical, physical and optical properties of metals. Due to their distinctive characteristics, which make them useful in several domains of science and technology, the production of nanostructured materials, notably metallic nanoparticles, has attracted enormous interest over the past few decades. Strain SCS1.1 (Stenotrophomonas maltophilia) was chosen for the in vitro production of copper nanoparticles based on its greatest capacity to synthesize copper nanoparticles. Maximum copper nanoparticle synthesis was accomplished using 5.0% peptone, 4.0 mM copper sulfate, 3.0% beef extract, as well as 4.0% microbial inoculum size after 48 h of incubation at 30 °C and pH 8.0. Under ideal conditions, copper nanoparticles were produced in vitro through biosynthesis, and they were examined using TEM, SEM, FTIR, XRD, UV–visible spectroscopy, and DLS. The copper nanoparticles made from the S. maltophilia strain SCS1.1 were also tested for their ability to suppress several bacterial infections. The outcome demonstrates that the NPs were created and exhibited strong antibacterial, as well as antifungal activity and suspension and have the potential to break down these pesticides.