Fig. 7
Reaction mechanism determination using SEM analysis where a control untreated R. solanacearum, b treated R. solanacearum with the biosynthesized Ag/SiO2 nanocomposite, and c schematic indication about the four significant forms of the antibacterial possibility of Ag/SiO2 nanocomposite, where: 1. Ag/SiO2 nanocomposite attaches to the R. solanacearum surface and results in membrane injury and limited transport movement. 2. Ag/SiO2 nanocomposite stop the ions transportation to and from the R. solanacearum. 3. Ag/SiO2 nanocomposite develop and improve the ROS directing to R. solanacearum wall crack. 4. Silver nanoparticles (Ag NPs), and silica nanoparticles (SiO2 NPs) liberated from Ag/SiO2 nanocomposite penetrate inside the R. solanacearum and interact with cellular organelles, thereby influencing individual cellular machinery and modulating the cellular signal design and inducing cell death. Ag/SiO2 nanocomposite may serve as a vehicle to effectively deliver Ag+, and Si+2 ions to the bacterial cytoplasm and membrane, where proton motive force would reduce the pH to be less than 3.2 and enhance the liberation of ions.