Improving Glucose Bio Sensor Using Colloidal Gold Nanoparticles

One of the best methods for detecting a few glucose values is to use of glucose oxidase electrochemical sensor. The application of colloidal gold nanoparticles can be effective in biosensors structure as a complementary substance. This material was increased the efficiency and the operation. In this article, the biosensor electrode was prepared by the mixed of colloidal gold nanoparticles (24nm), carbon graphite powder and paraffin oil (Aunano/CPE). The amperometric experiments were done by applying 0.7V constant potential. The electrodes were put on glucose solutions with different concentration values (0-1 mM) and pH values (4, 6, and 8) and the amperometric values for each electrode (Aunano/CPE and CPE only) were determined. The highest produce current was obtained in 1 mM at pH=6 as optimal conditions. The amperometric responses of Aunano/CPE was compared to carbon past electrode (CPE) in different pH and concentration values. Based on the results, the use of colloidal gold nanoparticles improve the biosensor performance.