Non-enzymatic Glucose Biosensor Based on Cu/SWNTs Composite Film Fabricated by One-step Electrodeposition

摘要

Based on the adsorption of copper ions on single-walled carbon nanotubes(SWNTs) in electrolyte, Cu/SWNTs nanocomposite film was initially prepared on indium-doped tin oxide(ITO) substrate by one-step electrodeposition. This method may provide a versatile and facile pathway to fabricate other SWNTs-supported metal composite films. Electrochemical experiments revealed that the obtained Cu/SWNTs/ITO electrode offered an excellent electrocatalytic activity towards the oxidation of glucose and could be applied to the construction of non-enzymatic glucose biosensor. The linear range of the sensor was 1.0×10-6 to 6.0×10-4 mol/L and the response time was within 2 s. Particularly, its sensitivity reached as high as 1434.67 μA?L?mmol-1?cm-2, which was superior to any other non-enzymatic glucose biosensor based on copper-carbon nanotubes electrode reported previously.