Wet-Adaptive Electronic Skin.

Skin Electronics Provides Remarkable Opportunities for Non-Invasive And Long-Term Monitoring of A Wide Variety of Biophysical And Physiological Signals that Are Closely Related to Health, Medicine, And Human-Machine Interactions. Nevertheless, Conventional Skin Electronics Fabricated on Elastic Thin Films Are Difficult to Adapt to The Wet Microenvironments of The Skin: Elastic Thin Films Are Non-Permeable, Which Blocks The Skin Perspiration; Elastic Thin Films Are Difficult to Adhere to Wet Skins; Most Skin Electronics Are Difficult to Work Underwater. Here, We Report A Wet-Adaptive Electronic Skin (WADE-skin), Which Consists of A Next-To-Skin Wet-Adhesive Fibrous Layer, A Next-To-Air Waterproof Fibrous Layer, And A Stretchable And Permeable Liquid Metal Electrode Layer. While The Electronic Functionality Is Determined by The Electrode Design, This WADE-skin Simultaneously Offers Superb Stretchability, Wet Adhesion, Permeability, Biocompatibility, And Waterproof Property. The WADE-skin Can Rapidly Adhere to Human Skin After Contact for A Few Seconds And Stably Maintain The Adhesion Over Weeks Even Under Wet Conditions, Without Showing Any Negative Effect to The Skin Health. We Demonstrate The Use of WADE-skin for The Stable Recording of Electrocardiogram During Intensive Sweating as Well as Underwater Activities, And as The Strain Sensor for The Underwater Operation of Virtual Reality-Mediated Human-Machine Interactions. This article is protected by copyright. All rights reserved.