DETERMINATION OF DOPAMINE WITH TWO-DIMENSIONAL MoS2 MODIFIED GLASSY CARBON ELECTRODE

Dopamine (DA) is a hormone secreted in the brain and it provides communication between nerve cells and ensures that body movements are carried out in a balanced way. Since dopamine is an electroactive compound, its determination by electrochemical techniques can be done with high sensitivity, easy processing and low cost. Molybdenum Sulfide (MoS2) is one of the important two-dimensional (2D) transition metal dialcogenes from graphene analogues. Transition metal dicalcogenes (TMD) are denoted by the general formula MX2 (M = Mo, W, V, Nb, Ta, Ti, Zr, Hf and X = S, Se, Te). With their unique electronic, optical, thermal, mechanical and electrical properties and structures similar to graphene, they have found a wide range of applications by forming an interesting group of materials. In recent years, the most studied of the transition metal dicalcogenes are MoS2 and WS2. In the study, glassy carbon electrode (GCE) was modified with MoS2. In experimental studies, two different methods were used for the preparation of modified electrodes. The first of these methods is the drip coating (DC) method. The electrode prepared by modifying the GCE with this method is called MoS2 (1)/GCE electrode. The second method applied is the electrochemical coating method. The electrode prepared by modifying the GCE with this method is called MoS2(2)/GCE electrode. In this study, electrode modification was made for dopamine and dopamine was detected electrochemically with these two electrodes. In order to see the efficiency in DA determination, DA determination in a commercial drug called Dopmin was successfully performed with MoS2(1)/GCE and MoS2(2)/GCE with a relative error of 4.9 % and -1.0 %, respectively