Provides in-depth coverage of advances in polymeric materials used for designing biosensors and chemical sensors, including permselective membranes and immobilization for enzyme systems, electropolymerized thin films, polymer membranes on planar substrates, and hydration-dependent polymer applications. Covers fundamental aspects relevant to the design and fabrication of biosensors and offers unique insights into materials used for their fabrication. Offers an interdisciplinary approach toward correlating material properties with biosensor and chemical sensor response to optimize sensor performance. Also includes an overview chapter by Elizabeth Hall.