Fabrication of horseradish peroxidase immobilized poly(N-[3-(trimethoxy silyl)propyl]aniline) gold nanorods film modified electrode and electrochemical hydrogen peroxide sensing

► An enzymatic approach for coating gold nanorods with a polymer has been demonstrated. ► Simultaneous immobilization of the enzyme has been achieved. ► Gold nanorods are welded through the surface coated polymer. ► Immobilized enzyme shows direct electron transfer to the electrode. ► The biosensor exhibits high sensitivity and selectivity toward hydrogen peroxide.