Akademik Veri Yönetim Sistemi
12. International Summit Scientific Research Congress, Gaziantep, Türkiye, 29 - 31 Mayıs 2024, ss.594-601, (Tam Metin Bildiri)
Cyclic voltammetry (CV) analysis, an electrochemical measurement technique, is used extensively in material research in energy storage, sensors, health, medical, etc. fields that make life easier in daily life. It is simply based on cycling an electrode with a positive and negative electric field that changes linearly over time when immersed in a solution, and measuring the resulting current. Since the analyzes take a long time and the researchers block the device in the process, it is necessary to increase the number of devices that perform CV analysis. Finding low-cost solutions for these devices, which are limited in number due to their costs, has created the motivation of this work. In general, electrical measurements are conducted with reference to a fixed ground lead, usually the negative lead of a power supply. However, immersing a conductive cable at ground potential in a liquid solution environment causes uncertain and variable ground voltages other than zero in the solution. For this reason, a potentiostat device is used in such measurements. A potentiostat is a control and measuring device in an electrochemical cell that maintains the potential of a (working) electrode at a constant level relative to the reference electrode. The reference electrode is usually an electrode made of silver/silver chloride (Ag/AgCl) or a saturated calomel electrode (SCE). In the study, the system developed for the design of a low-cost potentiostat and the first measurement results are given. The triangular wave signal, which is the first component of the system and determines the scan rate and electric field intensity, was provided by a laboratory-type function generator. By designing a circuit with a high-speed operational amplifier, this triangular wave was applied to an electrochemical measurement cell according to the reference electrode potential. The working electrode current was obtained by the circuit designed using an operational amplifier and the current-voltage converter structure. The cyclic voltammetry curve was obtained by viewing the applied triangular waveform and the signal at the output of the current voltage converter in X-Y mode on a digital oscilloscope.