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Conducting Polymer Microelectrodes Anchored to Hydrogel Films
Yuichiro Ido1, Daisuke Takahashi1, Masato Sasaki1
1Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki, Aoba-ku, Sendai 980-8579, Japan.
ACS Macro Letters
|May 17, 2022
Summary
We developed novel organic hydrogel microelectrodes using poly(3,4-ethylenedioxythiophene) (PEDOT) with low sheet resistivity. This versatile fabrication method enables micropatterning of various hydrogels for advanced applications.
Area of Science:
- Materials Science
- Electrochemistry
- Biomedical Engineering
Background:
- Conductive polymers like poly(3,4-ethylenedioxythiophene) (PEDOT) are crucial for electronic devices.
- Developing flexible and biocompatible electrode materials remains a significant challenge.
Purpose of the Study:
- To fabricate totally organic hydrogel-based microelectrodes.
- To achieve low sheet resistivity in PEDOT-based microelectrodes.
- To demonstrate a versatile method for micropatterning various hydrogels.
Main Methods:
- Electrodeposition of conductive PEDOT on platinum microelectrodes.
- Lamination of hydrogels and subsequent electrodeposition of a second PEDOT layer.
- Peeling off hydrogel sheets with PEDOT micropatterns using PEDOT's electroactuation property.
Main Results:
- Fabrication of organic hydrogel-based microelectrodes with poly(3,4-ethylenedioxythiophene) (PEDOT).
- Achieved a low sheet resistivity of approximately 100 Ω/□.
- Demonstrated versatility with natural (agarose, collagen) and synthetic (polyacrylamide) hydrogels.
Conclusions:
- A novel and versatile method for creating organic hydrogel-based microelectrodes was successfully developed.
- The fabricated PEDOT-hydrogel microelectrodes exhibit promising low sheet resistivity.
- This technique is adaptable for a wide range of hydrogel materials, opening possibilities for flexible electronics and biosensors.
