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Recent Progress in Mechanically Robust and Conductive‐Hydrogel‐Based Sensors
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Recent Progress in Mechanically Robust and Conductive‐Hydrogel‐Based Sensors
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Journal Article
Recent Progress in Mechanically Robust and Conductive‐Hydrogel‐Based Sensors
2023
Overview
Flexible electronic technology has developed rapidly in recent years, showing broad application prospects in motion monitoring, wearable devices, and personalized medicine. Consequently, the demand for high sensitivity and wide sensing range has gradually increased. Conductive hydrogels have high flexibility, excellent conductivity, and good biocompatibility, making them ideal candidates for fabricating flexible sensors. However, conductive hydrogels exhibit weak mechanical stability, which limits their applications. Therefore, sufficient mechanical properties and fatigue resistance are usually needed to fulfill their application requirements. Herein, the research frontiers of sensors based on mechanically robust conductive hydrogels are reviewed. While published papers always focus on the configuration design and application of sensors and the improvement of sensing performance, research on the network design of hydrogels and their effects on mechanical properties and sensing performance are limited. It is attempted in this review to fill this gap by focusing on the design principles of mechanically enhanced conductive hydrogels and their applications in flexible electronic devices. Herein, hydrogels’ structural designs, toughening mechanisms, mechanical properties, and sensing applications are discussed. The different working mechanisms of flexible sensors composed of tough conductive hydrogels and their applications are also reviewed. Finally, the future development directions and challenges in this field are highlighted. Hydrogels have gained significant attention in the field of flexible sensors because of their outstanding conductivity and flexibility. This review aims to provide an overview of the design and fabrication of different types of conductive hydrogels, while also investigating the intricate relationships between their structure and performance. Their working mechanisms, sensing capabilities, and applications to flexible sensors are explored.
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