Simultaneous electrochemical determination of dopamine and ascorbic acid using AuNPs@polyaniline core-shell nanocomposites modified electrode

► We synthesized the AuNPs@PANI core-shell nanocomposites by one-step. ► AuNPs@PANI possessed excellent electroactivity in neutral and even alkaline solution. ► Dopamine and ascorbic acid were simultaneously determined by the fabricated biosensor.