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Antibacterial tests performed on pristine PET (PET), underwater laser-treated PET without embedded AgNPs at laser fluence 14 mJ cm−2 (PET/H2O_14), and AgNP-immobilized PET at fluencies of 14 and 22 mJ cm−2. Tests were evaluated on E. coli and S. epidermidis and antibacterial efficacy was measured by number of colony-forming units (CFU). Control bar represents CFU of bacteria in pure physiological solution.
