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Related Experiment Videos

Electric cell-substrate impedance sensing with screen printed electrode structures.

Martin Brischwein1, Sigrun Herrmann, Winfried Vonau

  • 1Heinz Nixdorf-Lehrstuhl für Medizinische Elektronik der Technischen Universität München, Theresienstrasse 90/N3, 80333 Munich, Germany. brischwein@tum.de

Lab on a Chip
|June 2, 2006
PubMed
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Thick film impedance sensors effectively monitor cell behavior and growth. These screen-printed platinum electrodes show promise for electric cell-substrate impedance sensing applications.

Area of Science:

  • Materials Science
  • Biotechnology
  • Sensor Technology

Background:

  • Electric cell-substrate impedance sensing (ECIS) is crucial for monitoring cell behavior.
  • Thick film technology offers a potential platform for developing cost-effective impedance sensors.

Purpose of the Study:

  • To evaluate the performance of thick film impedance sensors for ECIS.
  • To compare thick film interdigitated electrode structures (IDES) with thin film counterparts.

Main Methods:

  • Screen printing of platinum electrodes (250-400 microm width) on ceramic substrates.
  • Homogeneous cell growth (L-929 and Hela cells) on electrodes and substrates.
  • Comparison of thick film IDES with thin film structures of identical geometry.
  • Recording cellular responses to histamine stimulation using thick film sensors.

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Main Results:

  • Thick film impedance sensors successfully recorded morphological responses of Hela cell layers to histamine.
  • Cell growth on electrode surfaces influenced impedance values, even at low frequencies (~1 Hz).
  • Homogeneous cell coverage was achieved on both electrodes and ceramic substrates.

Conclusions:

  • Thick film technology is a viable method for fabricating ECIS sensors.
  • These sensors can accurately detect cell behavior and growth dynamics.
  • The technology demonstrates potential for label-free cell monitoring in various biological applications.