<br>基于皮肤热感受器的电子皮肤，用于仿生热痛反射,Advanced Science

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基于皮肤热感受器的电子皮肤，用于仿生热痛反射
Advanced Science ( IF 14.3 ) Pub Date : 2022-07-25 , DOI: 10.1002/advs.202201525
João Neto ₁ , Radu Chirila ₁ , Abhishek Singh Dahiya ₁ , Adamos Christou ₁ , Dhayalan Shakthivel ₁ , Ravinder Dahiya ₁

Affiliation

近年来，具有类皮肤形态和功能的电子系统（电子皮肤[e-skins]）引起了人们的广泛关注，以在机器人、假肢和交互系统等不断发展的领域提供感觉或触觉反馈。然而，迄今为止的主要焦点是分布式压力或力传感器。本文提出了一种具有生物系统等功能的热感受电子皮肤。电子皮肤中柔软、分布式、高灵敏度的小型化（约 700 µm ² ）人工温度感受器 (ATR) 采用创新制造路线开发，其中包括在指定位置介电泳组装定向五氧化二钒纳米线和高分辨率电流体动力印刷。受皮肤形态的启发，ATR 嵌入隔热软纳米二氧化硅/环氧聚合物层中，但它们表现出出色的热敏感性 (−1.1 ± 0.3% °C ⁻¹ )、快速响应 (≈1s)、出色的稳定性（可忽略不计） >5 小时操作的滞后）和机械耐久性（最多 10 000 次弯曲和扭转负载循环）。最后，将开发的电子皮肤集成到机器人手的指尖上，并通过硬件级别的本地学习来演示反射等生物系统对温度刺激的响应。

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Skin-Inspired Thermoreceptors-Based Electronic Skin for Biomimicking Thermal Pain Reflexes

Electronic systems possessing skin-like morphology and functionalities (electronic skins [e-skins]) have attracted considerable attention in recent years to provide sensory or haptic feedback in growing areas such as robotics, prosthetics, and interactive systems. However, the main focus thus far has been on the distributed pressure or force sensors. Herein a thermoreceptive e-skin with biological systems like functionality is presented. The soft, distributed, and highly sensitive miniaturized (≈700 µm²) artificial thermoreceptors (ATRs) in the e-skin are developed using an innovative fabrication route that involves dielectrophoretic assembly of oriented vanadium pentoxide nanowires at defined locations and high-resolution electrohydrodynamic printing. Inspired from the skin morphology, the ATRs are embedded in a thermally insulating soft nanosilica/epoxy polymeric layer and yet they exhibit excellent thermal sensitivity (−1.1 ± 0.3% °C⁻¹), fast response (≈1s), exceptional stability (negligible hysteresis for >5 h operation), and mechanical durability (up to 10 000 bending and twisting loading cycles). Finally, the developed e-skin is integrated on the fingertip of a robotic hand and a biological system like reflex is demonstrated in response to temperature stimuli via localized learning at the hardware level.

更新日期：2022-07-25

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