Vol. 10, Issue 10 (2021)

Author(s):
M Yashini and S Shanmugasundaram

Abstract:
Electro-deposition of metal nanoparticles is an emerging method that acts as a rapid and inexpensive process for the development of metal-based nanosensors. Metal nanoparticles such as gold nanoparticles (AuNPs) have gained great attention for the sensitive detection of analyte in the sensing field. In this study, Taguchi's design of experiment was employed in designing and optimization of AuNPs electro-deposition process on the electrode, in addition, to examine significant factors influencing the process, as an attempt to achieve maximum peak current from a minimum number of experimental runs. Cyclic voltammetry was applied to assess the influence of parameters on peak current. The scan rate, AuNPs concentration, potential range, and cycles were selected as parameters. A larger Signal-to-Noise ratio was applied to maximize the current response. An optimal combination was scan rate (0.05 V/s), potential range (+0 to +1), cycles (20), and AuNPs concentration (4µM). A significant difference (p< 0.05) was observed in parameters such as potential range, scan rate, and cycles in electro-deposition process. A linear regression model was developed and validated successfully. The electrode surface was characterized. The results suggest that the Taguchi method could be used for the optimization of the sensor development process to enhance performance.