▎ 摘　　要

NOVELTY - Composition comprises a composite material comprising at least one conducting polymer doped with graphene oxide, and at least one agent immobilized at least one of (i) on graphene oxide extending from the surface of the composite material or (ii) within the composite material. USE - As composition. ADVANTAGE - The composition is simple and cost-effective. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) system, comprising a support, and a composition deposited on the support, the composition comprising a composite material comprising at least one conducting polymer doped with graphene oxide, and at least one agent immobilized at least one of (i) on graphene oxide extending from the surface of the composite material or (ii) within the composite material; (2) method (M1) of forming a composition, involves (a) forming a composite material comprising at least one conducting polymer and graphene oxide, where graphene oxide extends from the surface of the composite material, and immobilizing at least one agent upon graphene oxide extending from the composite material, (b) immobilizing graphene oxide and at least one agent within at least one conducting polymer, or (c) immobilizing graphene oxide within at least one conducting polymer and controlling particle size of the graphene oxide to control at least one property of the composition; and (3) method (M2) for applying an electric current to the composition, involves providing a composition comprising a composite material comprising at least one conducting polymer doped with graphene oxide, the composition further comprising at least one agent releasably immobilized within the composite material, and applying an electric current to the composition to release the agent from the composite material.