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Related Experiment Video

Updated: Aug 3, 2025

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording
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Fast Reconfigurable Electrode Array Based on Titanium Oxide for Localized Stimulation of Cultured Neural Network.

Jiaxin Xu1, Hamidreza Shirinkami1, Seoyoung Hwang2

  • 1Department of Biomedical Engineering, Korea University, Hana Science Hall, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea.

ACS Applied Materials & Interfaces
|April 10, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel reconfigurable titanium dioxide (TiO2) electrode array for precise neural stimulation. This light-addressable system allows for high-resolution, single-cell level analysis in vitro.

Keywords:
Light-addressable electrodeTiO2 filmneural interfacephotoconductivityreconfigurable electrode array

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Area of Science:

  • Materials Science
  • Neuroscience
  • Bioengineering

Background:

  • Planar microelectrode arrays are standard for in vitro neural network analysis but lack adaptability.
  • Target-specific cell manipulation within cultured networks requires more flexible tools.

Purpose of the Study:

  • To fabricate a reconfigurable electrode array for precise, light-addressable neural stimulation.
  • To enable high-resolution analysis of neural networks at the single-cell level.

Main Methods:

  • Fabrication of a reconfigurable TiO2 electrode array with a mesoporous layer.
  • Utilizing UV light and a digital micromirror device (DMD) for patterned stimulation.
  • Characterization of TiO2 film properties including photoconductivity, stability, and response time.

Main Results:

  • The TiO2 electrode array demonstrated selective UV light absorption and high photoconductivity.
  • Achieved a high Roff/Ron ratio of 10^5 and a fast response time of 400 ms.
  • Exhibited high stability over 30 days in an aqueous environment and enabled localized neural stimulation.

Conclusions:

  • The reconfigurable TiO2 electrode array offers a promising tool for high-resolution, light-addressable neural interfacing.
  • This technology facilitates independent connection of up to 60 points for electrophysiological research.
  • The developed system enhances the analysis of cell and neural-network features with a highly localized neural interface.