Printed nanomaterials for All-in-One integrated flexible wearables and bioelectronics
Kwon, Youngjin Kim, Jongsu Kim, Hojoong Kang, Tae Woog Lee, Jimin Jang, Seung Soon Lee, Yongkuk Yeo, Woon-Hong
Kwon, Youngjin
Kim, Jongsu
Kim, Hojoong
Kang, Tae Woog
Lee, Jimin
Jang, Seung Soon
Lee, Yongkuk
Yeo, Woon-Hong
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2024-11-25
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Keywords
Aerosol-jet printing,Bioelectronics,Flexible electronics,Nanomaterials,Wearables
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Citation
Youngjin Kwon, Jongsu Kim, Hojoong Kim, Tae Woog Kang, Jimin Lee, Seung Soon Jang, Yongkuk Lee, and Woon-Hong YeoACS Applied Materials & Interfaces 2024 16 (49), 68016-68026 DOI: 10.1021/acsami.4c17939
Abstract
Recent advancements in printing technologies allow for fabricating various wearable sensors, circuits, and integrated electronics. However, most printing tools have limited ranges of handling ink viscosity, a short working distance, and a limited feature size for developing sophisticated electronics. Here, this paper introduces an all-in-one integrated wearable electronic system via multilayer, multinanomaterial printing. Versatile, high-resolution aerosol-jet printing could successfully print Cu nanoparticles, Ag nanoparticles, PEDOT:PSS, and polyimide (PI) to manufacture nanomembrane composite structures, including skin-contact electrodes and wireless circuits. The printed polymer, PEDOT:PSS deposited on the Cu, ensures biocompatibility when making direct skin contact while enhancing electrical conductivity for electrodes. A self-assembled monolayer facilitates better adhesion of Cu nanoparticles on the PI. Also, using intensive pulsed light, a photonic sintering method minimizes Cu-oxidation while avoiding thermal damage. The combined experimental and computational study shows the mechanical flexibility and reliability of the printed integrated device. With human subjects, the flexible wireless bioelectronic system demonstrates superior performance in detecting high-fidelity physiological signals on the skin, including electromyograms, electrooculograms, electrocardiograms, and motions, proving its potential applications in portable human healthcare and persistent human-machine interfaces. © 2024 The Authors. Published by American Chemical Society.
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American Chemical Society
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ACS Applied Materials and Interfaces
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19448244