A Hierarchical Nanoparticle‐in‐Micropore Architecture for Enhanced Mechanosensitivity and Stretchability in Mechanochromic Electronic Skins

• DOI: 10.1002/adma.201808148
• Publication Date: 2019-05-09T13:55:20Z
• Authors: Jonghwa Park; Youngoh Lee; Meredith H. Barbee; Soowon Cho; Seungse Cho; Ravi Shanker; Jinyoung Kim; Jinyoung Myoung; Minsoo P. Kim; Chunggi Baig; Stephen L. Craig; Hyunhyub Ko
• Keywords: Soft Robotics

Biological tissues are multiresponsive and functional, similar properties might be possible in synthetic systems by merging responsive polymers with hierarchical soft architectures. For example, mechanochromic have applications force-responsive colorimetric sensors robotics, but their integration into sensitive, multifunctional devices remains challenging. Herein, a nanoparticle-in-micropore (NP-MP) architecture porous polymers, which enhances the mechanosensitivity stretchability of electronic skins (e-skins), is reported. The NP-MP structure results stress-concentration-induced mechanochemical activation mechanophores, significantly improving sensitivity to both tensile strain normal force (critical strain: 50% force: 1 N). Furthermore, composites exhibit reversible mechanochromism under 250%. This enables dual-mode e-skin for detecting static/dynamic forces via triboelectricity. provides general platform develop high stretchability.