A Laminated Strategy Enabled Sustainable Tactile Array with Ultra‐Stable Sensory Augmentation

• Published in: Advanced functional materials
• Main Authors: Hao, Sanwei, Wang, Wenqi, Ma, Chao, Li, Xin, Liu, Xidie, Wang, Yicong, Xue, Zhimin, Xu, Feng, Yang, Jun
• Format: Journal Article
• Language: English
• Published: 10-08-2024
• ISSN: 1616-301X; 1616-3028
• DOI: 10.1002/adfm.202410360

Abstract The sustainable tactile electronics demonstrates huge potential in mimicking the functionality of human skin and satisfies with an eco‐friendly concept. However, on the premise of successfully introducing natural materials, such electronics are still not sufficient for improving the fatigue threshold in high‐frequency sensing scenarios. Here an eco‐ and user‐friendly cellulose integrated tactile array (CITA) is introduced that relies on laminated hierarchical architecture (LAHA) for alleviating the notorious structural vulnerability toward long‐term haptic evaluation. By cross‐validation with conventional bulky configuration, finite element simulation unveils that the LAHA leverages compact laminated adjacent layer for dramatically facilitating in‐plane stress distribution for diminishing the interfacial stress concentration, thus affords prolonged and reliable sensory augmentation. The CITA wireless monitoring system offers impeccable real‐time spatiotemporal haptic patterns on multi‐user interfaces and can substantially promote a record‐high durability (150000 cycles), showcasing low interfacial contact impedance (1.78 ± 0.4 ohm, 1 kHz), remarkably channel uniformity (97.2%), unparalleled sensitivity (12944 kPa −1 ), and sensing‐robustness against perturbations (e.g., humidity, temperature, and bending). It is envisioned that the proposed CITA system will open up new avenues for sustainable tactile electronics in continuous health surveillance.