Alternate deposition of cationic and anionic polymers for the improvement of response characteristics of glucose biosensor

Organic thin films composed of cationic and anionic polymers were prepared on the surface of glucose biosensor by an alternate deposition technique, t o improve the response characteristics of the biosensor. The polymer thin f ilm significantly suppressed the permeation of both glucose and ascorbic ac id, which resulted in a suppression of ascorbate interference or an improve ment of the dynamic range, depending on the arrangement of the enzyme and p olymer layers on the electrode surface.