Nanocages-augmented aligned polyaniline nanowires as unique platform for electrochemical non-enzymatic glucose biosensor

• Nanocages-augmented polyaniline nanowires (NCa-PANI NWs) are grown on silicon substrate.
• Glucose biosensor is fabricated by using NCa-PANI NWs electrode.
• Unique NCa-PANI NWs shows good electrocatalytic activity towards glucose.
• NCa-PANI NWs based biosensor shows excellent selectivity towards glucose.
• Glucose biosensor shows good sensing response with sensitivity of ∼156.4 mA mM−1 cm−2.

Non-enzymatic glucose biosensor was developed by utilizing the electrochemically grown nanocages-augmented polyaniline nanowires (NCa-PANI NWs) on silicon (Si) substrate. The NCa-PANI NWs were comprehensively analyzed in terms of the composition, optical, structural and the morphological properties. The grown NCa-PANI NWs were distributed uniformly on the entire surface of Si substrate, which confirmed the formation of highly dense NCa-PANI NWs networks during the electrochemical oxidation. A series of sensing performances for NCa-PANI NWs electrode were investigated by current (I)–voltage (V), cyclic voltammetry (CV) and amperometry measurements. The sensing results revealed that fabricated non-enzymatic sensor showed an excellent response to glucose with a stable, reliable, and high sensitivity of ∼156.4 mA mM−1 cm−2, good detection limit of ∼0.657 μM with correlation coefficient (R) of ∼0.99493. The fabricated glucose sensor based on NCa-PANI NWs electrode exhibited significant electrochemical stability, good reproducibility and the selectivity.

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