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(a) Representative confocal image of bacteria inoculated on CuS NP monolayer on sample without irradiation; (b) the same on sample after 60’ of NIR irradiation (0.35 W/cm2); (c) percentage of dead bacteria found after a 3 h contact on a non-functionalized glass sample (blank), on a CuS NP-glass sample in absence of irradiation (control), and on a CuS NP-glass sample in presence of 30’ or 60’ irradiation within the 3 h contact. Field of view: 64.2 × 64.2 μm2.
