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Related Experiment Video

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In Vitro Multiparametric Cellular Analysis by Micro Organic Charge-modulated Field-effect Transistor Arrays
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Transparent, conformable, active multielectrode array using organic electrochemical transistors.

Wonryung Lee1, Dongmin Kim1,2, Naoji Matsuhisa1

  • 1Department of Electrical Engineering and Information Systems, The University of Tokyo, Tokyo 113-8656, Japan.

Proceedings of the National Academy of Sciences of the United States of America
|September 20, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed a transparent, ultraflexible active multielectrode array (MEA) using organic electrochemical transistors (OECTs). This transparent MEA enables simultaneous optical observation and neural signal recording, overcoming limitations of previous opaque devices.

Keywords:
multielectrode arrayoptogeneticorganic electrochemical transistorsthin filmstransparent electrode

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Area of Science:

  • Neuroscience
  • Materials Science
  • Bioelectronics

Background:

  • Mechanically flexible active multielectrode arrays (MEAs) offer high spatial resolution for neural signal recording.
  • Opaque MEAs hinder simultaneous optical observation and light stimulation during experiments.

Purpose of the Study:

  • To develop a transparent, ultraflexible active MEA for combined optical and electrical neural recording.
  • To evaluate the performance of transparent organic electrochemical transistors (OECTs) in MEA applications.

Main Methods:

  • Fabrication of transparent MEAs using transparent organic electrochemical transistors (OECTs) and gold grid wirings.
  • Performance comparison between transparent and non-transparent OECTs.
  • Spatial mapping of electrocorticogram (ECoG) signals in an optogenetic rat model.

Main Results:

  • Demonstrated comparable performance of transparent OECTs to non-transparent ones.
  • Achieved spatial mapping of ECoG signals with 1-mm spacing.
  • Observed minimal light artifacts, below the noise level, during recordings.

Conclusions:

  • The developed transparent active MEA overcomes the opacity limitations of previous devices.
  • This technology enables precise investigation of neural networks with simultaneous light stimulation.
  • The transparent MEA opens new avenues for optogenetics and neural interface research.