Transactions on Additive Manufacturing Meets Medicine
Vol 1 No 1 (2019): Trans. AMMM
https://doi.org/10.18416/AMMM.2019.1909S02T01

Bioelectronic Applications

Designing electrodes for electrical impedance spectroscopy in a four terminal setup

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Tobias Barth (Institute for Integrated Circuits, Hamburg University of Technology, Hamburg, Germany), Viviane Silva Teixeira (Institute for Integrated Circuits, Hamburg University of Technology, Hamburg, Germany), Wolfgang Krautschneider (Institute for Integrated Circuits, Hamburg University of Technology, Hamburg, Germany)

Abstract

Electrical impedance spectroscopy has a high potential for monitoring and characterizing samples, e.g., biological cells. The technique is highly sensitive but artefacts often disturb it. This study discusses problems for miniaturization of the measurement volume needed to observe single cells in a 3D printed 4T setup. There is a capacitive artefact between 1 Hz – 1 kHz introduced by the distortion of the electric field due to fringing effects. Proposed solution for reducing distortion: use of thinner measurement electrodes.

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