Tang An, Wang Jiachen, Xu Jia-Li, Liu Jun-Tao, Xu Tianpeng, Zhang Qiang, Tian Yu
School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, 310018, China.
Department of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, 999077, China.
Biosens Bioelectron. 2025 Jun 15;278:117317. doi: 10.1016/j.bios.2025.117317. Epub 2025 Feb 26.
The integration of visualization and electrical feedback in biomimetic electronic skin (E-skin) for real-time motion tracking has attracted significant attention in wearable electronics. To facilitate human-readable interactive feedback and improve the overall performance of E-skin, particularly regarding mechanical compliance, sensitivity, and stability, we propose a novel high-performance photonic-ionic skin (PI-skin) based on mechanochromic photonic ionogel. The PI-skin, prepared by incorporating aligned magnetic colloids into an ionogel matrix, integrates interactive structural coloration and electrical responses to external stimuli, achieving dual-mode precise motion recognition. Due to the enhanced hydrogen bonding and electrostatic interactions within the ionogel matrix, the PI-skin exhibits excellent mechanical properties (tensile strain >1000%), remarkable adhesive strength (peeling force >7 kPa), high sensitivity (gauge factor = 1.42 at straining 0%-300% and 2.71 at straining 300%-500%), rapid response time (120 ms), and exceptional mechanical compliance (>500 continuous cycles). More importantly, such PI-skin demonstrates ultrafast and highly accurate optical/electrical dual-signal motion detection, thereby facilitating posture correction during sitting and encoding of vocal cord vibrations during speech. We anticipate that this versatile PI-skin will possess substantial potential in the field of wearable electronics, and may inspire the design of next-generation E-skin for human-computer interaction and personalized healthcare applications.
用于实时运动跟踪的仿生电子皮肤（E-skin）中可视化与电反馈的集成在可穿戴电子设备中引起了广泛关注。为了实现便于人类读取的交互式反馈并提高E-skin的整体性能，特别是在机械顺应性、灵敏度和稳定性方面，我们提出了一种基于机械变色光子离子凝胶的新型高性能光子离子皮肤（PI-skin）。通过将排列的磁性胶体掺入离子凝胶基质中制备的PI-skin，集成了交互式结构显色和对外部刺激的电响应，实现了双模式精确运动识别。由于离子凝胶基质内增强的氢键和静电相互作用，PI-skin表现出优异的机械性能（拉伸应变>1000%）、显著的粘附强度（剥离力>7 kPa）、高灵敏度（在0%-300%应变时应变系数=1.42，在300%-500%应变时为2.71）、快速响应时间（120 ms）和出色的机械顺应性（>500次连续循环）。更重要的是，这种PI-skin展示了超快速和高精度的光学/电双信号运动检测，从而便于坐姿时的姿势校正和语音时声带振动的编码。我们预计这种多功能的PI-skin在可穿戴电子设备领域将具有巨大潜力，并可能激发下一代用于人机交互和个性化医疗应用的E-skin的设计。
