Abstract:
Biological compounds like dopamine (DA) depict a crucial role in food, clinical and human
metabolism. Abnormalities in DA concentration lead to serious disorders, hence, requires an
efficient sensor for its detection. A highly selective and sensitive electrochemical sensor for DA
is prepared by modification of PGE with selenium and silver nanoparticles. XRD, SEM and
EDX were used to characterize the prepared samples. Herein, we report the modification of PGE
with Se nanostructures (Se/PGE) via CBD technique and a simple solvothermal method for
deposition of Ag nanoparticles (Ag/Se/PGE). The Ag/Se/PGE exhibited selective electro
catalytic performance for DA sensing. Ag/Se/PGE exhibited a stable amperometry results up to
0.001uM DA concentration. In addition, Ag/Se/PGE displayed a negligible response to
interferents like ascorbic acid, glucose, NaCl, citric acid at the selected applied potential.
