title: Parallel Microcracks-based Ultrasensitive and Highly Stretchable Strain Sensors.
abstract: There is an increasing demand for flexible, skin-attachable, and wearable strain sensors due to their various potential applications. However, achieving strain sensors with both high sensitivity and high stretchability is still a grand challenge. Here, we propose highly sensitive and stretchable strain sensors based on the reversible microcrack formation in composite thin films. Controllable parallel microcracks are generated in graphite thin films coated on elastomer films. Sensors made of graphite thin films with short microcracks possess high gauge factors (maximum value of 522.6) and stretchability (ε ≥ 50%), whereas sensors with long microcracks show ultrahigh sensitivity (maximum value of 11,344) with limited stretchability (ε ≤ 50%). We demonstrate the high performance strain sensing of our sensors in both small and large strain sensing applications such as human physiological activity recognition, human body large motion capturing, vibration detection, pressure sensing, and soft robotics.
authors: Physical Intelligence Department, Max Planck Institute for Intelligent Systems , Heisenberstr. 3, 70569, Stuttgart, Germany.
authors: Morteza
authors: M
authors: Amjadi
authors: Physical Intelligence Department, Max Planck Institute for Intelligent Systems , Heisenberstr. 3, 70569, Stuttgart, Germany.
authors: Mehmet
authors: M
authors: Turan
authors: Physical Intelligence Department, Max Planck Institute for Intelligent Systems , Heisenberstr. 3, 70569, Stuttgart, Germany.|Department of Biomedical Engineering, University of Arizona , Tucson 85721, Arizona, United States.
authors: Cameron P
authors: CP
authors: Clementson
authors: Physical Intelligence Department, Max Planck Institute for Intelligent Systems , Heisenberstr. 3, 70569, Stuttgart, Germany.
authors: Metin
authors: M
authors: Sitti
mesh_terms: D015374:Biosensing Techniques; D020724:Elastomers / Q000737:chemistry; D004867:Equipment Design; D006801:Humans; D009038:Motion; D036103:Nanotechnology
chemical_list: D020724:Elastomers
keywords: human motion detection; parallel microcracks; skin-attachable sensors; strain sensors; wearable sensors