Performance Analysis of Optimized Screen-Printed Electrodes for Electrochemical Sensing

The screen-printed electrode (SPE) sensor is widelyemployedin food analysis, environmental health monitoring, disease detection, toxin detectionandother applications.As it crucial for the SPE to have an outstanding performance, this study examined effects of manipulatingthe working electrode(WE)radius, gap spacing between electrodes, and counter (CE) width on performance sensor.Finite element simulation various geometrical dimensions was done prior sensor’s fabrication at Jabil Circuits Sdn Bhd.The electrodes measured throughcyclic voltammetry (CV)using a potentiostat optimum scan rate of0.01 V/s andavoltammetry potential window range -0.2 0.8 Vin 0.01 MPhosphate Buffered Saline (PBS) solution.It discovered that adjusting WE area separation had most impact compared varying CE width. In both CV measurements, with highestradius 0.9 mmwith aneffectivearea 2.54 mm2, smallestgap 0.7 mm has shown highest current density 0.04 A/mm2(simulation) 0.3 μA/mm2(experiment) which can be translated as sensitivity sensor.Further measurement in nicotine sensing application proven effectively detect oxidation indicating itspromising biosensor. Combination dimension together suitableelectrode modificationprocessservesas basis effective sensitive biosensing applications.