@article{Guo2025, 
author = {Binbin Guo and Chengyu Lin and Haitao Ye and Yu Xue and Jiewen Mo and Jiawei Chen and Yangfeng Cui and Chenglong Fu and Jiaming Bai and Qi Ge and Hui Ying Yang},
title = {3D printed organohydrogel-based strain sensors with enhanced sensitivity and stability via structural design},
year = {2025},
journal = {International Journal of Extreme Manufacturing},
volume = {7},
number = {5},
keywords = {3D printing, organohydrogel, sensitivity, stability, structural design},
url = {https://www.sciopen.com/article/10.1088/2631-7990/add971},
doi = {10.1088/2631-7990/add971},
abstract = {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.}
}