Enzyme modified membranes protected by plasma polymer layers

A peroxidase modified membrane was stabilized by thin plasma polymer layer deposited using the monomers allylalcohol or hexamethyldisilazane. In comparison to the uncoated enzyme membrane, there is a significant operational stability improvement of the hydrogen peroxide detection. H2O2 can be detected in the range between 4 and 1000 μM. The sensor is stable for more than 1000 detections under flow injection conditions.