Co₃O₄ Nanosheets Anchored on SiO₂ Nanospheres for Non-Enzymatic Glucose Sensor.

The electrochemical sensing performance is sensitive to the surface area. To achieve superior performance, we design and anchor Co3O4 nanosheets on the surface of SiO2 nanospheres via a simple solvothermal method, which possess large sensing interface and exposed catalytic sites due to the 2D structure and edge terminated feature. Based on these combined structural advantages, the present sample is employed as an ideal platform for non-enzymatic glucose sensing and exhibits high sensitivity, low detection limit, and wide linear range for glucose electrocatalytic oxidation, enabling it as a promising candidate for enzyme-free amperometric sensor for glucose determination.