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8 February 2024 A novel sensitive disposable screen-printed electrochemical aptasensor based on gold nanoparticles decorated multilayer Nb4C3Tx for cadmium ion detection
Zhouxiang Zhang, Hassan Karimi-Maleh, Najmeh Zare Jahanabadi
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Proceedings Volume 13066, International Conference on Optoelectronic Materials and Devices (ICOMD 2023); 1306605 (2024) https://doi.org/10.1117/12.3025167
Event: 2023 International Conference on Optoelectronic Materials and Devices (COMD 2023), 2023, Chongqing, China
Abstract
Cadmium ion (Cd2+) is one of the most poisonous metallic pollutants, which would lead to many health issues due to it can accumulate in body through food chain and cannot undegradability. Herein, a new disposable screen printed electrochemical aptamer sensor (aptasensor) was designed to detect Cd2+ in water environments. Multilayer Nb4C3Tx (ML-Nb4C3Tx) was firstly modified onto the screen-printed carbon electrode (SPCE) surface as the substrate materials to support large surface area, and later gold nanoparticles (AuNPs) were loaded onto the surface of ML-Nb4C3Tx through electrodeposition. Subsequently, the double-stranded DNA including aptamers was self-assembly onto the modified electrode surface by the bond of Au-S. Due to its high specificity towards Cd2+, the aptamers tagged with ferrocene would specifically combine with Cd2+ to form folded structures, and then leave from the electrode surface. After that, the current changes of electrochemical aptasensor can be detected by square wave voltammetry (SWV). Under the optimized experimental conditions, the proposed aptasensor exhibits a good linear relationship between the current values with the logarithm of Cd2+ concentrations from 0 to 1000 μg/L, and its LOD was calculated as 0.08 μg/L (S/N=3). Besides, the electrochemical aptasensor shows high sensitivity, great selectivity, acceptable reproducibility and good stability.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Zhouxiang Zhang, Hassan Karimi-Maleh, and Najmeh Zare Jahanabadi "A novel sensitive disposable screen-printed electrochemical aptasensor based on gold nanoparticles decorated multilayer Nb4C3Tx for cadmium ion detection", Proc. SPIE 13066, International Conference on Optoelectronic Materials and Devices (ICOMD 2023), 1306605 (8 February 2024); https://doi.org/10.1117/12.3025167
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KEYWORDS
Cadmium
Electrodes
Niobium
Ions
Environmental sensing
Carbon
Gold nanoparticles
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