Open AccessWearable and Stretchable Strain Sensors: Materials, Sensing Mechanisms, and Applications
Author(s) -
Souri Hamid,
Banerjee Hritwick,
Jusufi Ardian,
Radacsi Norbert,
Stokes Adam A.,
Park Inkyu,
Sitti Metin,
Amjadi Morteza
Publication year - 2020
Publication title -
advanced intelligent systems
Language(s) - English
Resource type - Journals
ISSN - 2640-4567
DOI - 10.1002/aisy.202000039
Subject(s) - wearable computer , capacitive sensing , resistive touchscreen , wearable technology , materials science , computer science , linearity , sensitivity (control systems) , nanotechnology , electronic engineering , embedded system , engineering , computer vision , operating system
Recent advances in the design and implementation of wearable resistive, capacitive, and optical strain sensors are summarized herein. Wearable and stretchable strain sensors have received extensive research interest due to their applications in personalized healthcare, human motion detection, human–machine interfaces, soft robotics, and beyond. The disconnection of overlapped nanomaterials, reversible opening/closing of microcracks in sensing films, and alteration of the tunneling resistance have been successfully adopted to develop high‐performance resistive‐type sensors. On the other hand, the sensing behavior of capacitive‐type and optical strain sensors is largely governed by their geometrical changes under stretching/releasing cycles. The sensor design parameters, including stretchability, sensitivity, linearity, hysteresis, and dynamic durability, are comprehensively discussed. Finally, the promising applications of wearable strain sensors are highlighted in detail. Although considerable progress has been made so far, wearable strain sensors are still in their prototype stage, and several challenges in the manufacturing of integrated and multifunctional strain sensors should be yet tackled.