Polymers have also been investigated as electrodes for pathogen detection. Polymers have various advantages, including tunable electrical conductivity, biocompatiblity, and environmentally stability. Polymer electrodes are also compatible with a range of biorecognition element immobilization techniques (Arshak et al. 2009; Guimard et al. 2007). Polymers also exhibit mechanical properties that enable electrode-tissue mechanical matching, an important consideration in the design of implantable and wearable biosensors. Polymer electrodes can be broadly classified as (1) conjugated polymer or (2) polymer composite.