Realizing high-performance wood-based piezoresistive sensing through an interfacial bridging approach for wearable...

Area of Science:

• Materials Science
• Nanotechnology
• Biomaterials

Background:

• Wood-based aerogels are promising for flexible electronics due to sustainability and porosity.
• Existing sensors face challenges in sensitivity, detection range, and stability from filler dispersion and bonding issues.

Purpose of the Study:

• To develop a high-performance wood aerogel piezoresistive sensor.
• To address limitations in sensitivity, detection range, and stability in current wood-based sensors.

Main Methods:

• Fabrication of a MXene/carbon nanotube (CNT) wood aerogel using a covalent-noncovalent interfacial bridging strategy.
• Creation of a layered porous structure with a stable 3D conductive network.

Main Results:

• The sensor demonstrated superior elasticity (96.70% stress retention after 1000 cycles).
• Achieved a broad detection range (0-160 kPa) and high sensitivity (13.76 kPa⁻¹).
• Integrated with machine learning, it recognized hand gestures with 99.44% accuracy.

Conclusions:

• The developed wood aerogel sensor offers a sustainable design for high-performance flexible electronics.
• The strategy enables reliable operation in physiological monitoring, motion detection, and robotics.
• This work presents a novel approach for advanced wearable sensor applications.