Ultracompact MXene V₂C-Improved Temperature Sensor by a Runway-Type Microfiber Knot Resonator

Area of Science:

• Materials Science
• Optical Sensing
• Nanotechnology

Background:

• Fiber optic sensors offer remote and precise measurement capabilities.
• MXene materials, particularly V2C, exhibit promising photothermal properties.
• Developing compact and efficient temperature sensors is crucial for various applications.

Purpose of the Study:

• To demonstrate an all-fiber, compact, and highly efficient temperature sensor.
• To integrate MXene V2C into a runway-type microfiber resonator.
• To investigate the sensing performance of the proposed device.

Main Methods:

• Synthesis of MXene V2C via a two-step method.
• Fabrication of a runway-type microfiber knot resonator.
• Integration of MXene V2C onto the resonator's runway section.
• Characterization of the sensor's response to temperature variations.

Main Results:

• The MXene V2C material showed excellent photothermal conversion.
• The sensor exhibited a linear response to temperature changes between 25-70 °C.
• A maximum normalized sensing efficiency of 2.21 dB/°C/mm was achieved.
• The runway-type structure enhanced material-fiber interaction and sensor compactness.

Conclusions:

• The developed sensor is compact, efficient, and suitable for temperature sensing.
• MXene V2C is a viable material for optical fiber sensing applications.
• The runway-type structure offers a promising integration strategy for functional material-based sensors.