College of Electronic Information and Optical Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
Department of Electrical Engineering, Sukkur IBA University, Sukkur 65200, Pakistan.
ACS Sens. 2024 Feb 23;9(2):840-848. doi: 10.1021/acssensors.3c02172. Epub 2024 Jan 25.
Electronic skins (e-skins) are being extensively researched for their ability to recognize physiological data and deliver feedback via electrical signals. However, their wide range of applications is frequently restricted by the indispensableness of external power supplies and single sensory function. Here, we report a passive multimodal e-skin for real-time human health assessment based on a thermoelectric hydrogel. The hydrogel network consists of poly(vinyl alcohol)/low acyl gellan gum with [Fe(CN)] as the redox couple. The introduction of glycerol and Li furnishes the gel-based e-skin with antidrying and antifreezing properties, a thermopower of 2.04 mV K, fast self-healing in less than 10 min, and high conductivity of 2.56 S m. As a prospective application, the e-skin can actively perceive multimodal physiological signals without the need for decoupling, including body temperature, pulse rate, and sweat content, in real time by synergistically coupling sensing and transduction. This work offers a scientific basis and designs an approach to develop passive multimodal e-skins and promotes the application of wearable electronics in advanced intelligent medicine.
电子皮肤（e-skins）因其能够识别生理数据并通过电信号提供反馈的能力而受到广泛研究。然而，其广泛的应用经常受到外部电源和单一传感功能的不可或缺性的限制。在这里，我们报告了一种基于热电水凝胶的被动式多模态电子皮肤，可用于实时人体健康评估。水凝胶网络由聚乙烯醇/低酰基结冷胶与 [Fe(CN)] 作为氧化还原对组成。甘油和 Li 的引入赋予基于凝胶的电子皮肤抗干燥和抗冻结的特性，热功率为 2.04 mV K，在不到 10 分钟内快速自修复，以及 2.56 S m 的高电导率。作为一个有前景的应用，电子皮肤可以通过协同传感和转换，主动感知包括体温、脉搏率和汗液含量在内的多种生理信号，而无需解耦。这项工作为开发被动式多模态电子皮肤提供了科学依据和设计方法，并促进了可穿戴电子产品在先进智能医学中的应用。
