Dynamic Response Study of Piezoresistive Ti₃C₂-MXene Sensor for Structural Impacts

Area of Science:

• Materials Science
• Nanotechnology
• Mechanical Engineering

Background:

• MXenes are a novel class of two-dimensional (2D) nanomaterials, with titanium carbide MXene (Ti3C2-MXene) being the first reported in 2011.
• Ti3C2-MXenes possess advantageous properties such as conductivity, hydrophilicity, film-forming ability, and elasticity, enabling diverse applications.
• These properties make Ti3C2-MXenes suitable for use in wearable sensors, energy harvesters, supercapacitors, and electronic devices.

Purpose of the Study:

• To develop a piezoresistive Ti3C2-MXene sensor.
• To experimentally investigate the dynamic response of the Ti3C2-MXene sensor under structural impacts.
• To compare the performance of the Ti3C2-MXene sensor with a commercial piezoceramic sensor.

Main Methods:

• Development of a piezoresistive Ti3C2-MXene sensor.
• Construction of an inclined ball impact test setup for controlled dynamic loading.
• Attachment of both the Ti3C2-MXene sensor and a commercial piezoceramic sensor to a vertical cantilever plate.
• Application of repeatable impacts using stainless steel balls of varying masses and radii.

Main Results:

• The Ti3C2-MXene sensor demonstrated an average response time of 1.28±0.24μs.
• The commercial piezoceramic sensor exhibited an average response time of 31.19±24.61μs.
• The experimental results highlight the significantly faster response of the Ti3C2-MXene sensor.

Conclusions:

• The developed Ti3C2-MXene sensor exhibits exceptionally fast dynamic response characteristics.
• Its rapid response time positions Ti3C2-MXene as a highly promising material for structural impact monitoring.
• This research validates the potential of 2D Ti3C2-MXene nanomaterials in advanced sensing applications.