Silver Nanoparticle Antibacterial Kinetics (2D)

Silver nanoparticles are one of the most widely deployed nanomaterials in consumer and medical products — wound dressings, textiles, water filters — because they are bactericidal even at very low mass loadings. This 2D simulator renders a culture dish of silver nanoparticles releasing Ag⁺ ions into solution and a bacterial population dying off as the dissolved-ion dose crosses a minimum inhibitory concentration threshold. Shrinking the particle diameter raises the total exposed surface area at the same total mass (S/V = 3/r for a sphere), speeding up dissolution under a Noyes–Whitney-style release equation, while the resulting Ag⁺ concentration drives an MIC-gated, dose-dependent bacterial kill law. A live population-vs-time chart tracks the die-off directly, making the size-dependence of antibacterial speed numerically visible: smaller nanoparticles reach a lethal dose — and drive the population to zero — measurably sooner than larger ones at the same total silver mass.