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Highly uniform Cu–Ag polyurethane (PU) sputtered films inactivated Escherichia coli presenting normal cell wall porins but were shown to require longer times to inactivate genetically modified porinless Escherichia coli. The Cu–Ag–PU films were observed to inactivate E. coli ∼7 times faster compared to Cu-films and ∼15 times faster compared to Ag-films by themselves under low intensity actinic light...
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