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- Title
INVESTIGATION OF GOLD NANOPARTICLE MODIFICATION ON SCREEN PRINTED GOLD ELECTRODE BY ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY.
- Authors
KOÇ, Yücel; AVCI, Huseyin
- Abstract
Recently increasing attention has been paid to the development of highly sensitive and selective electrochemical sensors for accurate and cost-effective detection in various fields. In this study, gold nanoparticles (AuNPs) were electro-deposited onto screen printed gold electrode (SPGE) surfaces at different times to determine the optimum modification conditions. Determining the optimum modification for the SPGE surface, AuNP modification under −0.3 V potential with 2 mM HAuCl4 (in 0.5 M H2SO4) solution were investigated. In this case, for the optimum AuNP modification, electrochemical impedance spectroscopy (EIS) analysis was performed at the following deposition times: 30, 60, 90, 120, and 150 s. As a result of modeling the Nyquist graph obtained in the range of 10 kHz to 0.1 Hz with the EIS analysis based on the equivalent circuit model, the outcomes for each modification time were analyzed. After the modification with AuNPs, scanning electron microscope (SEM) images of the SPGE surfaces were discussed. As a result, the optimum deposition time was determined as 90 s by the analysis. In this study, an electrochemical investigation was carried out with a detailed perspective for the modification of AuNPs on the SPGE surface. In addition, the importance of optimum nanoparticle modification to obtain a smooth electrode surface has been demonstrated, and it is thought that it can help to the researchers for their studies in the field.
- Subjects
GOLD nanoparticles; GOLD electrodes; IMPEDANCE spectroscopy; NYQUIST diagram; ELECTROPLATING
- Publication
Journal of Engineering & Architectural Faculty of Eskisehir Osmangazi University / Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi, 2022, Vol 30`, Issue 3, p389
- ISSN
2630-5712
- Publication type
Article
- DOI
10.31796/ogummf.1066433