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Related Concept Videos

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Updated: Mar 26, 2026

Sensitivity Enhancement of Soft Capacitive Pressure Sensors Using a Solvent Evaporation-Based Porosity Control Technique
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All-plastic fiber-based pressure sensor.

Ivan-Lazar Bundalo, Richard Lwin, Sergio Leon-Saval

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    Summary
    This summary is machine-generated.

    We developed a novel all-plastic fiber-based pressure sensor using CO2 laser-inscribed gratings in PMMA. This prototype shows promise for future endoscopic pressure sensing applications.

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    Area of Science:

    • Materials Science
    • Optics and Photonics
    • Sensor Technology

    Background:

    • Fiber-based sensors offer advantages for minimally invasive applications.
    • Developing robust, all-plastic sensors is crucial for biocompatibility and cost-effectiveness.
    • Pressure sensing in confined spaces, like during endoscopy, requires specialized sensor designs.

    Purpose of the Study:

    • To demonstrate the feasibility of an all-plastic fiber-based pressure sensor.
    • To develop and characterize a prototype sensor utilizing long period gratings.
    • To explore potential applications in endoscopic procedures.

    Main Methods:

    • Inscribing long period gratings in polymethyl methacrylate (PMMA) microstructured fibers using a CO2 laser.
    • Coupling the gratings to a pod-like transducer to convert pressure into strain.
    • Characterizing the sensor prototype's performance for pressures up to 150 millibars.
    • Investigating construction parameters to optimize sensor sensitivity.

    Main Results:

    • Successful fabrication of an all-plastic fiber-based pressure sensor prototype.
    • Demonstrated pressure sensing capabilities up to 150 millibars.
    • Identification of key parameters for enhancing sensor sensitivity.

    Conclusions:

    • The developed all-plastic fiber sensor is feasible for pressure measurement.
    • The sensor design shows potential for integration into endoscopic devices.
    • Further optimization could lead to highly sensitive endoscopic pressure sensors.