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Updated: Jan 9, 2026

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Fully-Flexible Multifunctional Polydimethylsiloxane (PDMS) Neural Probe With a U-Turn Polyester Microchannel.

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    |December 9, 2025
    PubMed
    Summary
    This summary is machine-generated.

    This study developed a flexible, implantable neural probe with tunable stiffness for electrophysiology, drug delivery, and optogenetics. The novel polydimethylsiloxane-polyester device minimizes immune response for advanced neuroengineering applications.

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    Area of Science:

    • Biomedical Engineering
    • Neuroscience
    • Materials Science

    Background:

    • Traditional neural probes often lack flexibility, leading to immune responses and limited functionality.
    • Integrating multiple functions like electrophysiology, drug delivery, and optogenetics into a single implantable device remains a challenge.

    Purpose of the Study:

    • To develop a flexible, implantable neural probe with tunable stiffness and multifunctionality.
    • To minimize immune response and enhance tissue compatibility for long-term implantation.
    • To enable simultaneous electrophysiology, drug delivery, and optogenetics.

    Main Methods:

    • Fabrication of a polydimethylsiloxane (PDMS) probe with a polyester-filled microchannel for tunable stiffness.
    • Integration of a microfluidic mixer for controlled drug delivery and a μ-LED for optogenetics.
    • Mechanical, thermal, and fluid simulations to optimize probe design and ensure biocompatibility.

    Main Results:

    • The PDMS-polyester probe demonstrated thermally controlled stiffness, softening near body temperature.
    • Stable electrophysiological recordings and successful in vitro fluorescence activation were achieved.
    • Biocompatibility testing confirmed suitability for long-term implantation with minimal immune response.

    Conclusions:

    • The developed probe offers a flexible, multifunctional platform for advanced neuroengineering.
    • This technology addresses limitations of rigid implants, paving the way for multimodal brain interfacing.
    • The probe shows significant potential for reducing tissue response and improving therapeutic outcomes.