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Stretchable and Highly Permeable Nanofibrous Sensors for Detecting Complex Human Body Motion
Yehu David Horev1, Arnab Maity1, Youbin Zheng1
1Department of Chemical Engineering and Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa, 3200003, Israel.
Advanced Materials (Deerfield Beach, Fla.)
|August 23, 2021
Summary
Researchers developed a new ultrathin, breathable strain sensor by grafting nanofibrous polyaniline onto elastomer nanomeshes. This wearable sensor accurately tracks complex human movements and activities with minimal interference.
Area of Science:
- Materials Science
- Biomedical Engineering
- Wearable Technology
Background:
- Wearable strain sensors are crucial for monitoring human motion and rehabilitation.
- Existing sensors face challenges in comfort, accuracy, and body interaction.
Purpose of the Study:
- To develop a highly permeable, stretchable, and comfortable strain sensor for continuous motion recording.
- To achieve accurate and low-interference human motion tracking.
Main Methods:
- Covalently grafting nanofibrous polyaniline (PANI) onto stretchable elastomer nanomeshes.
- Fabricating freestanding, ultrathin (300-10,000 nm) strain sensors with high gas permeability (10-33 mg h⁻¹).
Main Results:
- The sensor is lightweight, breathable, and adheres comfortably to skin for extended periods.
- Demonstrated stable performance, linearity, durability, and low hysteresis.
- Accurately detected complex movements, muscle activities, and brain signals, distinguishing bending/twisting stimuli (1-180°, 3-18 rpm) with minimal interference.
Conclusions:
- The developed strain sensor offers a promising solution for advanced wearable electronics.
- Potential applications include robotic e-skins and e-muscles due to its performance and biocompatibility.
