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Schematics of the 4-armed PEG-PPS polymer coating on a metal implant for passive elution or active release of antibiotics by reactive oxygen species (ROS) (Figs. 1-A and 1-B) and visualization of the polymer coating through use of a model molecule, rhodamine (Fig. 1-C; left, bare titanium wire with no coating; middle, rhodamine encapsulated in 3% (w/v) PEG-PPS coating on a titanium wire; right, rhodamine in 6% (w/v) PEG-PPS on a titanium wire).
