TY  - JOUR
AU  - Guo, Binbin
AU  - Lin, Chengyu
AU  - Ye, Haitao
AU  - Xue, Yu
AU  - Mo, Jiewen
AU  - Chen, Jiawei
AU  - Cui, Yangfeng
AU  - Fu, Chenglong
AU  - Bai, Jiaming
AU  - Ge, Qi
AU  - Yang, Hui Ying
PY  - 2025
TI  - 3D printed organohydrogel-based strain sensors with enhanced sensitivity and stability via structural design
JO  - International Journal of Extreme Manufacturing
SN  - 2631-8644
VL  - 7
IS  - 5
AB  - Organohydrogel-based strain sensors are gaining attention for real-time health services and human-machine interactions due to their flexibility, stretchability, and skin-like compliance. However, these sensors often have limited sensitivity and poor stability due to their bulk structure and strain concentration during stretching. In this study, we designed and fabricated diamond-, grid-, and peanut-shaped organohydrogel based on positive, near-zero, and negative Poisson’s ratios using digital light processing (DLP)-based 3D printing technology. Through structural design and optimization, the grid-shaped organohydrogel exhibited record sensitivity with gauge factors of 4.5 (0–200% strain, ionic mode) and 13.5/1.5 × 106 (0−2%/2%−100% strain, electronic mode), alongside full resistance recovery for enhanced stability. The 3D-printed grid structure enabled direct wearability and breathability, overcoming traditional sensor limitations. Integrated with a robotic hand system, this sensor demonstrated clinical potential through precise monitoring of paralyzed patients’ grasping movements (with a minimum monitoring angle of 5°). This structural design paradigm advanced flexible electronics by synergizing high sensitivity, stability, wearability, and breathability for healthcare, and human-machine interfaces.
UR  - https://doi.org/10.1088/2631-7990/add971
DO  - 10.1088/2631-7990/add971