Heavy Metal Sensing Based on Electrochemically Grown Gold Nanostructure and Genetically Modified Flagellar Filaments

Stift, Máté Kálmán and Bonyár, Attila and Lábadi, Zoltán and Jankovics, Hajnalka and Vonderviszt, Ferenc and Petrik, Péter (2025) Heavy Metal Sensing Based on Electrochemically Grown Gold Nanostructure and Genetically Modified Flagellar Filaments. In: 2025 International Semiconductor Conference (CAS). International Semiconductor Conference . IEEE, Piscataway (NJ), pp. 363-366. ISBN 9781665457606

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Abstract

Thin-film structures containing gold nanoparticles may be used as optical and electrochemical sensors for detecting target molecules and contaminants in liquids. In this study, gold nanoparticles were deposited on gold substrate using electrochemical methods, followed by the deposition of specific protein filaments. Preparative voltammetry and chronoamperometry were used during the deposition, while in situ optical monitoring was applied using ellipsometry. The functioning of the sensor was evaluated by detecting Ni(II) ions in aqueous solutions. The results demonstrate that the sensor structure enables selective detection of nickel.

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