Comparative electrical impedance spectroscopy study of graphene and indium tin oxide electrodes during low frequency measurements

2021 IEEE 15th International Symposium on Applied Computational Intelligence and Informatics (SACI) Pub Date : 2021-05-19 DOI:10.1109/SACI51354.2021.9465546

A. Hencz, Gábor S. Szilágyi, Nina Gyorfi, Kristof Tenzlinger, A. Széchenyi, Á. Odry, P. Odry, Z. Karádi, Zoltán Vízvári, Attila Tóth

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Abstract

The four-electrode system is often applied to examine the dielectric properties of biological samples in low frequency range because the four-electrode method can be used to avoid measurement inaccuracies due to electrode polarization. This study is aiming to create four-electrode sensors that can provide reliable data about measuring cells even at low frequencies. Graphene and indium tin oxide (ITO) covered macroelectrodes were fabricated and compared, using electrical impedance spectroscopy (EIS). Impedance measurements were performed with solution series of NaCl. The impedance values of NaCl concentrations were not significantly different for the graphene and ITO electrodes but the standard deviation of data were larger for ITO electrodes than for graphene electrodes. Based on our investigations, the graphene-coated four-electrode sensor can provide cost-effective and sensitive measurements in the study of alpha and beta dispersions of cells.

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石墨烯和氧化铟锡电极在低频测量中的阻抗谱比较研究

由于四电极方法可以避免由于电极极化引起的测量误差，因此四电极系统经常用于低频范围内生物样品的介电特性检测。这项研究旨在制造四电极传感器，即使在低频率下也能提供有关测量细胞的可靠数据。利用电阻抗谱(EIS)对石墨烯和氧化铟锡(ITO)覆盖的大电极进行了制备和比较。采用NaCl溶液系列进行阻抗测量。石墨烯电极和ITO电极的NaCl浓度阻抗值差异不显著，但ITO电极的数据标准差大于石墨烯电极。基于我们的研究，石墨烯涂层的四电极传感器可以为研究细胞的α和β分散提供成本效益和灵敏度的测量。

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2021 IEEE 15th International Symposium on Applied Computational Intelligence and Informatics (SACI)

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