Dijk G, Poulkouras R, OConnor RP. Electroporation Microchip with Integrated Conducting Polymer Electrode Array for Highly Sensitive Impedance Measurement.
IEEE Trans Biomed Eng 2022;
69:2363-2369. [PMID:
35041593 DOI:
10.1109/tbme.2022.3143542]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE
Monitoring of impedance changes during electroporation-based treatments can be used to study the biological response and provide feedback regarding treatment progression. However, seamless integration of the sensing electrodes with the setup can be challenging and high impedance sensing electrodes limit the recording sensitivity as well as the spatial resolution. Here, we present an all-in-one microchip containing stimulation electrodes, as well as an array of low impedance, micro-scale sensing electrodes for highly sensitive electrical impedance spectroscopy.
METHODS
An in vitro platform is fabricated with integrated stimulation and sensing electrodes. To reduce the impedance, the sensing electrodes are coated with the conducting polymer PEDOT:PSS. The performance is studied during the growth of a confluent cell layer and treatment with electrical pulses.
RESULTS
Coated electrodes, compared to uncoated electrodes, show more pronounced impedance changes in a broader frequency range throughout the formation of a confluent cell layer and electrical treatment.
CONCLUSION
PEDOT:PSS coatings enhance monitoring of impedance changes with micro-scale electrodes, enabling high spatial resolution and increased sensitivity.
SIGNIFICANCE
Enhanced monitoring techniques can be utilized to study electroporation dynamics and monitor treatment progression for better understanding of underlying mechanisms and improved outcomes.
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