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Ti3CN MXene-based ultra-sensitive optical fiber salinity sensor.

Duo Yi, Cong Wang, Lingfeng Gao

    Optics Letters
    |December 24, 2021
    PubMed
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    A novel optical fiber sensor using titanium carbide MXene (Ti3CN MXene) achieves ultra-high sensitivity for detecting low concentrations of target molecules. This MXene-based sensor demonstrates superior performance for salinity measurements and potential for biosensing applications.

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    Area of Science:

    • Materials Science
    • Nanotechnology
    • Chemical Sensing

    Background:

    • Optical fiber sensors are crucial for detecting low-concentration analytes.
    • Traditional fiber modification techniques can be complex and damaging.
    • MXenes offer unique properties for enhanced sensor performance.

    Purpose of the Study:

    • To develop an ultra-sensitive optical fiber sensor using Ti3CN MXene.
    • To evaluate the sensor's performance for salinity measurements.
    • To explore MXene integration for advanced biosensing.

    Main Methods:

    • Fabrication of an optical fiber sensor incorporating Ti3CN MXene.
    • Characterization of the sensor's response to varying salinity levels.
    • Comparison of sensing performance with bare fiber and previous sensors.

    Main Results:

    • Achieved ultra-high salinity sensitivity of -5.34 nm/‰ (refractive index sensitivity of -33429 nm/RIU).
    • Demonstrated a 137.33% improvement over bare fiber sensors.
    • Sensing enhancement achieved without structural damage to the optical fiber.

    Conclusions:

    • Ti3CN MXene significantly enhances optical fiber sensor sensitivity.
    • The developed sensor shows great promise for low-concentration analyte detection and biosensing.
    • MXene integration offers a non-damaging approach for high-performance fiber optic sensors.