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Overlay of fluorescence and bright-field scanning confocal microscopy images of P. aeruginosa treated with 10 μg mL−1 of A: 50, B: 100, and C: 200 nm rhodamine isothiocyanate (RITC)-modified silica nanoparticles for 10 min. Magnification is 63, and scale bar is 5 μm. Reproduced with permission.[74] Copyright 2011, American Chemical Society.
