High rate fabrication of copper and copper-gold electrodes by laser-induced selective electroless plating for enzyme-free glucose sensing.

ABSTRACT

In the current study, the method of Selective Surface Activation Induced by Laser (SSAIL) was used for the fabrication of metallic and bimetallic structures based on copper and gold on the surface of glass and glass-ceramics. It was shown that the fabricated electrodes are suitable for non-enzymatic detection of biologically essential analytes such as glucose. The implemented approach allows performing high-rate metallization of various dielectrics. Voltammetric methods were applied to evaluate the electrocatalytic activity of the obtained structures, which were used as working electrodes. The most promising results were revealed by copper-gold electrode structures manufactured on glass-ceramics. For these structures, sensitivity towards glucose sensing was 3060 µA mM-1 cm-2. The linear range of glucose detection varied between 0.3 and 1000 µM. Besides, the manufactured electrodes exhibited high selectivity and long-term stability.