Abstract

Mitigation of the global threat associated with antibiotic-resistant microbes necessitates effective preventative measures. One such strategy relies on self-disinfecting anionic block polymers that undergo a water-activated surface pH drop, which kills over 99.9999% of various microbes in minutes. In this work, we elucidate the time-dependent morphological response of Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria to this polymer surface. Since pre-exposure of the polymer to solvent-vapor or hydrothermal annealing alters the tortuosity of pathways responsible for proton diffusion, corresponding changes in bacterial inactivation kinetics are compared and analyzed in the context of a model capable of differentiating between single-stage and more complex inactivation processes.

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