Multiscale Interfacial Confined Locking from Nano to Macro Enables Strain Insensitivity in Epidermal Electronic Devices
Abstract
Abstract Stable electrical conductivity in epidermal bioelectronics is essential for accurate health monitoring of humans. Yet, the poor adhesion between active conductive materials and elastic substrate leads to conductivity issues during deformation. Here, a multiscale interfacial confined locking strategy is proposed that combines molecular entanglement between the conductive polymer and the substrate with physical confinement within the electrospun membrane pores. To date, multiscale interfacial confined locking structures show the best interfacial adhesion strength (9.48 MPa) compared to previous works. Such structures benefit from a ≈13.9 times interface adhesion improvement over those without this design. For the first time, multiscale interfacial confined locking structures are prepared by in situ polymerization and swelling to enhance the interfacial adhesion strength, and the method can be extended to different substrates (e.g., polyurethane). The high adhesion promotes the wavy and wrinkled microstructure of the nanomesh film, which enables it to maintain a near‐constant resistance under tensile strain (≈200%). The prepared strain‐insensitive conductive film has been successfully applied to epidermal bioelectronics (e.g., sensor and bioelectrode).
Article Details
Authors (13)
Cuiyuan Liang
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage National and Local Joint Engineering Laboratory for Synthesis Transformation and Separation of Extreme Environmental Nutrients School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. China
Ming Zhu
State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory for Chemical Biology of Fujian Province, The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, Department of Chemical Biology, College of Chemistry and Chemical Engineering, State Key Laboratory of Vaccines for Infectious Diseases, Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, School of Life Sciences, Faculty of Medicine and Life Sciences
Yanguang Chen
Gongwei Tian
Key Laboratory of Science and Engineering for the Multi‐modal Prevention and Control of Major Chronic Diseases, Ministry of Industry and Information Technology Harbin Institute of Technology Zhengzhou Research Institute Zhengzhou 450000 P.R. China
Xiuli Dong
College of Chemistry and Chemical Engineering Northeast Petroleum University Daqing Heilongjiang 163318 P. R. China
Jing Sun
Peng Wang
Hua Liu
Shumin Niu
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage National and Local Joint Engineering Laboratory for Synthesis Transformation and Separation of Extreme Environmental Nutrients School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin 150001 P. R. China
Yan Liu
Zhiyuan Liu
Xiaodong Chen
Innovative Centre for Flexible Devices (iFLEX), Max Planck-NTU Joint Lab for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Republic of Singapore
Dianpeng Qi
Key Laboratory of Science and Engineering for the Multi‐modal Prevention and Control of Major Chronic Diseases, Ministry of Industry and Information Technology Harbin Institute of Technology Zhengzhou Research Institute Zhengzhou 450000 P.R. China