Dynamically Switchable Dual‐Mode Wearable Sensory Platforms Based on Electrical‐Ionic Bimodal Conductors
Year: 2025
Type: article
Abstract: High deformability, sensitivity, and durability are crucial for achieving high‐performance wearable strain sensors, but only a few reports successfully meet all these criteria. In this work, we propose dynamically switchable dual‐mode wearable sensory platforms based on electrical‐ionic bimodal conductors that integrate both electrical and ionic conductive characteristics within a simple bilayer structure. The conductor design incorporates highly conductive, crack‐forming silver nanowires (AgNWs) as the electrical channel and elastic ionogels as the ionic channel. Each conduction layer serves as the primary sensing channel, depending on the strain range. The electrical channel demonstrates superior performance in detecting low strains, leveraging dramatic resistance changes caused by the disruption of the AgNW network under strains. In contrast, the ionogel layer adjusts its resistance in response to geometric deformation upon stretching, enabling the detection across a broad strain range. The optimized sensory platform exhibits outstanding performance metrics, including high sensitivity (gauge factor ≈70.2), substantial deformability (≈260%), and remarkable durability (>5000 cycles). These features make it a robust candidate for next‐generation wearable sensory systems capable of precise and reliable physiological signal communication.
Source: Advanced Functional Materials
Authors: Jin Han Kwon, Hong Chul Moon
Institution: Korea Advanced Institute of Science and Technology
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
Award: G2750132044
OpenAlex ID: W4409158541