Reliable glucose sensing properties of electrodeposited vertically aligned manganese oxide thin film electrode

In this work, vertically aligned nanosheets of manganese oxide (MnO2) were deposited on stainless steel (SS) substrate via binder free anodic electrodeposition method. The MnO2 films were characterized with X-ray diffraction, energy dispersive X-ray spectroscopy, field emission scanning electron microscopy and X-ray photoelectron spectroscopy to study the crystal structure, elemental composition, morphology and chemical state. Further, the films were explored as an electrode for electrochemical detection of glucose by cyclic voltammetry and i–t amperometric techniques using three electrode system. The sensitivity of 4341 µA mM−1 cm−2 at working potential of 0.5 V/SCE was shown by MnO2 electrode with wide linear range of 50 µM–1.2 mM having lower detection limit of 0.53 µM. This result points that the vertically aligned nanosheets of MnO2 thin film can be a promising candidate for enzymeless glucose sensing.