Patent ID: 8437829

Claim:
An analyte sensor, comprising: a working electrode, wherein the working electrode having: a sensing layer comprising a first polymer and an analyte responsive enzyme positioned directly on top of the working electrode; and a diffusion resistance layer comprising a second polymer positioned on top of the sensing layer, wherein the diffusion resistance layer comprises a crosslinker and wherein the second polymer comprises the formula: wherein the solid horizontal line represents a polymer backbone; A is an alkyl substituted with a water-soluble constituent; D is a phenylalkyl group, an alkoxystyrene group, a hydroxyalkyl group, an alkoxyalkyl group, an alkoxycarbonylalkyl group, a poly(ethylene glycol)-containing group, or a polyhydroxyl-containing group; and each of n, l, p and q is independently a positive number, and wherein the crosslinker provides for intermolecular crosslinking between the first and second polymers.