Self-assembly synthesis of Co3O4/multiwalled carbon nanotube composites: an efficient enzyme-free glucose sensor

Abstract

Self-assembled cobalt oxide-multiwalled carbon nanotube composites were synthesized by simple and effective wet chemical routes. Using these materials, a modified glassy carbon electrode was fabricated and investigated for enzyme-free glucose sensor applications. The fabricated sensor exhibited a high sensitivity of 5089.1 μA mM⁻¹ cm⁻² with a detection limit of 10.42 μM over a glucose concentration ranging from 0.05 to 12 mM. The sensor also shows promising sensor features like stability, selectivity and fast detection. Moreover, the detection of glucose in human blood serum samples with the as-developed sensor agreed well with the results obtained from commercial glucose meters.