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Related Experiment Video

Updated: Mar 6, 2026

Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording
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Graphene neural interfaces for artifact free optogenetics.

Hongming Lyu, Xin Liu, Nick Rogers

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |March 9, 2017
    PubMed
    Summary

    Metal microelectrodes create light artifacts that interfere with combined electrophysiology and optical experiments. Graphene electrodes avoid these artifacts, offering a promising solution for simultaneous electrical and optical recordings.

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    Area of Science:

    • Neuroscience
    • Materials Science
    • Biomedical Engineering

    Background:

    • Light-induced artifacts in metal microelectrodes hinder simultaneous electrophysiology and optical techniques.
    • Existing metal-based electrodes present limitations for integrated optical and electrical recording.

    Purpose of the Study:

    • To systematically investigate and compare light-induced artifacts in gold (Au) and graphene electrodes.
    • To evaluate the suitability of graphene electrodes for combined electrophysiology and optical experiments.

    Main Methods:

    • Fabrication of both gold and transparent graphene electrodes in the same batch for direct comparison.
    • Systematic investigation of light-induced artifacts under experimental conditions simulating optogenetics or optical imaging.

    Main Results:

    • Gold electrodes exhibited significant light-induced artifacts that mimicked genuine local field potentials.
    • Graphene electrodes demonstrated a complete absence of light-induced artifacts.
    • Graphene electrodes possess favorable properties: high mechanical strength, good conductivity, transparency, and biocompatibility.

    Conclusions:

    • Graphene electrodes are a viable alternative to metal electrodes for experiments requiring simultaneous optical and electrical measurements.
    • The absence of light artifacts makes graphene electrodes highly promising for advancing combined electrophysiology and optical modalities.