Conductive polymers owe their unusual electronic properties such as electrical conductivity, and high electron affinity to the conjugated π-electron backbone in their polymer chain. This chain has alternating single and double bonds, with sp 2 hybridised carbon atoms which generate a wide charge delocalisation. This allows charge mobility along the polymer backbone and results in metal-like semiconductor properties. Literature describes the current generate at an electrode modified with a conducting polymer and antibodies immobilised on the surface to have four steps: (i) Charge transfer at the polymer/electrode interface.