Mohammad Al Mamun, Mohammad Al Mamun and Abdul Wahab, Yasmin and Hossain, M. A. Motalib and Abu Hashem, Abu Hashem and Johan, Mohd. Rafie and Alias, Nurul Ezaila and Hussin, Hanim and Muhamad, Maizan (2023) Determination of the aptamer probe density by double layer and redox capacitance of CNT-based electrochemical DNA-aptasensors. In: 14th IEEE Regional Symposium on Micro and Nanoelectronics, RSM 2023, 28 August 2023 - 30 August 2023, Langkawi, Kedah, Malaysia.
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Official URL: http://dx.doi.org/10.1109/RSM59033.2023.10327172
Abstract
Electrochemical DNA-Aptasensors are gaining increasing popularity for the recognition of numerous analytes ranging from tiny molecules to entire microorganisms due to their multiple benefits over antibody-based biosensors. However, the reliable determination of aptamer probe density in DNA-Aptasensors is a potential barrier to ensuring their quality and performance. In this regard, an innovative, simple, and reliable electrochemical method has been introduced by exploring the redox capacitance (CR) using [Ru(NH3)6]3+/2+as a model redox species to determine the DNA-Aptamer probe density on a CNT (carbon nanotube) modified gc (glassy carbon) electrode surface. Moreover, the results were compared with the probe density calculated by the existing method using double layer capacitance (CD). Despite a lack of reproducibility caused by the non-specifically adsorbed aptamers on CNT, an excellent coincidence was found between the results obtained following those two methods. Therefore, the new method will accelerate the commercialization of electrochemical DNA-Aptasensors by confirming their quality through assessing the reliable DNA-Aptamer probe density.
Item Type: | Conference or Workshop Item (Paper) |
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Uncontrolled Keywords: | DNA-Aptasensors, double layer, electrochemical, probe density, redox capacitance |
Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
Divisions: | Electrical Engineering |
ID Code: | 108360 |
Deposited By: | Yanti Mohd Shah |
Deposited On: | 27 Oct 2024 06:09 |
Last Modified: | 27 Oct 2024 06:09 |
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