Recent Advances in Strain-Insensitive Pressure Sensors: Structural and Material Approaches
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The development of strain-insensitive pressure sensors represents a critical breakthrough in stretchable electronics,addressing the fundamental challenge of strain-pressure coupling that has hindered the deployment of conventional sensors ondeformable surfaces. This review comprehensively examines recent advances in overcoming measurement limitations caused bysimultaneous pressure and strain stimuli in applications such as wearable health monitoring, soft robotics, and human-machine interfaces. We analyze two primary technological approaches: structural engineering strategies that physically decouple strain and pressureeffects through mechanical architectures, hierarchical patterns, specialized electrode geometries, and simultaneous measurement systems;and material-based solutions utilizing ionic elastomers, liquid metals, and engineered composites with intrinsic strain-independentproperties. Recent innovations have demonstrated remarkable performance achievements, including high sensitivity,exceptional strain insensitivity, and robust long-term stability. This review provides insights into current limitations, emerging challenges,and future directions for strain-insensitive pressure sensing technologies that will enable seamless integration of sensing capabilitiesinto dynamically deforming environments.
Abstract
The development of strain-insensitive pressure sensors represents a critical breakthrough in stretchable electronics,addressing the fundamental challenge of strain-pressure coupling that has hindered the deployment of conventional sensors ondeformable surfaces. This review comprehensively examines recent advances in overcoming measurement limitations caused bysimultaneous pressure and strain stimuli in applications such as wearable health monitoring, soft robotics, and human-machine interfaces. We analyze two primary technological approaches: structural engineering strategies that physically decouple strain and pressureeffects through mechanical architectures, hierarchical patterns, specialized electrode geometries, and simultaneous measurement systems;and material-based solutions utilizing ionic elastomers, liquid metals, and engineered composites with intrinsic strain-independentproperties. Recent innovations have demonstrated remarkable performance achievements, including high sensitivity,exceptional strain insensitivity, and robust long-term stability. This review provides insights into current limitations, emerging challenges,and future directions for strain-insensitive pressure sensing technologies that will enable seamless integration of sensing capabilitiesinto dynamically deforming environments.