The infection of implants poses a common problem. It has been shown that photoactive titanium dioxide coatings can prevent microbial infections by producing free radicals under illumination. Because these free radicals can also damage adjacent cells, it has to ensured that their existence is confined to the implant surface.

The Sant Lab characterized a nitrogen- and self-doped titania coating which produces free hydroxyl radicals upon illumination of the material. Among other characterization techniques the coating was investigated by SECM towards the effects of free radicals on a reducible and oxidizable redox mediator upon irridation in different distances from the coating surface. It could be shown that the existence of free radicals is indeed confined to the vicinity of the surface.

The ElProScan in combination with our acquisition and analysis software POTMASTER allows the creation of complex protocols for automated experiments. The online analysis can display distance-dependent values, e.g. peak currents from a CV while you are still measuring.

Read the paper: https://pubs.acs.org/doi/10.1021/acsomega.9b02188

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