| dc.description.abstract | Due to irregular diet or routine, more and more people of modern age are suffering from diabetes and increase the demand for blood glucose test strips. Gold electrodes are generally made by physical sputtering or CVD, these methods are expensive. In this study, gold electrode test strips were successfully fabricated by a low-cost electroless plating method. The PET substrate was produced by screen printing method using palladium as the catalyst. After electroless plating process, Ni, Pd and Au were plated to obtain the final electrode. The enzyme layer was dripped and the insulating layer was overlaid to complete the blood glucose test strip.
The samples were characterized by X-ray photoelectron spectroscopy, adhesion test, cyclic voltammetry and amperometric methods. The compositions of glucose oxidase and potassium ferricyanide in the enzyme components were compared. The differences between the carbon electrode and the gold electrode were compared. The results show that the optimum condition to deposit the nickel layer was 0.3 to 0.5 μm at 80 °C for 3 to 5 minutes, for palladium layer was about 0.03 μm at 53 °C for 5 minutes, and for gold layer was 0.04 to 0.06 μm at 80 °C for 8 minutes. It is successfully to manufacture on PET substrate with a size of 38 cm X 33 cm to obtain the best gold glucose test strip. The results of the test with single GOD and double potassium ferricyanide showed the best response. Finally, gold electrodes made of electroless plating are superior to carbon electrodes through comparison of precision, stability time, and addition of interfering substances such as ascorbic acid. | en_US |