Self-interconnecting Pt nanowire network electrode for electrochemical amperometric biosensor

摘要: One-dimensional Pt nanostructures are of considerable interest for the development highly stable and sensitive electrochemical sensors. This paper describes a self-interconnecting nanowire network electrode (PtNNE) detection hydrogen peroxide (H2O2) glucose with ultrahigh sensitivity stability. The as-prepared PtNNE consists polycrystalline nanowires high-index facets along side surface which provides more active atoms on kinks steps, those ultralong being interconnected each other to form free-standing membrane. excellent structural features promoted its performance as Pt-based sensor both in terms electrocatalytic activity Amperometric measurements towards were performed; showed an extremely high 1360 μA mM(-1) cm(-2). is mainly attributed resulting their superior H2O2, forming "electron freeway" transport model, could provide multiple electron pathways fast electrode, leading rapid reaction signal detection. also holds promise oxidase-based biosensor. As proof concept, PtNNE-based biosensor outstanding 114 cm(-2), low limit 1.5 μM, impressive range from 5 μM 30 mM.