Continuously printable electronics have the significant advantage of being efficient for fabricating conductive polymer composites;however,the precise tailoring of the 3D hierarchical morphology of conductive nanocomp...Continuously printable electronics have the significant advantage of being efficient for fabricating conductive polymer composites;however,the precise tailoring of the 3D hierarchical morphology of conductive nanocomposites in a simple dripping step remains challenging.Here,we introduce a one-step direct printing technique to construct diverse microdome morphologies influenced by the interfacial Marangoni effect and nanoparticle interactions.Using a jet dispenser for continuous processing,we effectively fabricated a soft epidermislike e-skin containing 64 densely arrayed pressure sensing pixels with a hierarchical dome array for enhanced linearity and ultrasensitivity.The e-skin has 36 temperature-sensing pixels in the outer layer,with a shield-shaped dome that is insensitive to pressure stimuli.Our prosthetic finger inserted with the printed sensor arrays was capable of ultragentle detection and manipulation,such as stably holding a fragile biscuit,using a soft dropper to elaborately produce water droplets and harvesting soft fruits;these activities are challenging for existing high-sensitivity tactile sensors.展开更多
Autonomously self-healing, reversible, and soft adhesive microarchitecturesand structured electric elements could be important features in stable and versatilebioelectronic devices adhere to complex surfaces of the hu...Autonomously self-healing, reversible, and soft adhesive microarchitecturesand structured electric elements could be important features in stable and versatilebioelectronic devices adhere to complex surfaces of the human body(rough, dry, wet, and vulnerable). In this study, we propose an autonomousself-healing multi-layered adhesive patch inspired by the octopus, which possessself-healing and robust adhesion properties in dry/underwater conditions.To implement autonomously self-healing octopus-inspired architectures, adynamic polymer reflow model based on structural and material design suggestscriteria for three-dimensional patterning self-healing elastomers. In addition,self-healing multi-layered microstructures with different moduli endowsefficient self-healing ability, human-friendly reversible bio-adhesion, and stablemechanical deformability. Through programmed molecular behavior ofmicrolevel hybrid multiscale architectures, the bioinspired adhesive patchexhibited robust adhesion against rough skin surface under both dry andunderwater conditions while enabling autonomous adhesion restoring performanceafter damaged (over 95% healing efficiency under both conditions for24 h at 30℃). Finally, we developed a self-healing skin-mountable adhesiveelectronics with repeated attachment and minimal skin irritation by laminatingthin gold electrodes on octopus-like structures. Based on the robust adhesionand intimate contact with skin, we successfully obtained reliable measurements during dynamic motion under dry, wet, and damagedconditions.展开更多
基金National Research Foundation of Korea,Grant/Award Numbers:RS-2024-00352352,NRF-2022R1A4A3032923South Korean Ministry of Trade,Industry and Energy,Grant/Award Number:RS-2022-00154781National Research Council of Science&Technology,Grant/Award Number:CRC230231-000。
文摘Continuously printable electronics have the significant advantage of being efficient for fabricating conductive polymer composites;however,the precise tailoring of the 3D hierarchical morphology of conductive nanocomposites in a simple dripping step remains challenging.Here,we introduce a one-step direct printing technique to construct diverse microdome morphologies influenced by the interfacial Marangoni effect and nanoparticle interactions.Using a jet dispenser for continuous processing,we effectively fabricated a soft epidermislike e-skin containing 64 densely arrayed pressure sensing pixels with a hierarchical dome array for enhanced linearity and ultrasensitivity.The e-skin has 36 temperature-sensing pixels in the outer layer,with a shield-shaped dome that is insensitive to pressure stimuli.Our prosthetic finger inserted with the printed sensor arrays was capable of ultragentle detection and manipulation,such as stably holding a fragile biscuit,using a soft dropper to elaborately produce water droplets and harvesting soft fruits;these activities are challenging for existing high-sensitivity tactile sensors.
基金National Research Foundation of Korea,Grant/Award Numbers: NRF-2021R1C1C1009925,2020R1A6A1A03048004, RS-2023-00214236Ministry of Trade,Industry & Energy (MOTIE, Korea),Grant/Award Number: RS-2022-00154781National Research Council of Science &Technology, Grant/Award Number:CRC230231-000。
文摘Autonomously self-healing, reversible, and soft adhesive microarchitecturesand structured electric elements could be important features in stable and versatilebioelectronic devices adhere to complex surfaces of the human body(rough, dry, wet, and vulnerable). In this study, we propose an autonomousself-healing multi-layered adhesive patch inspired by the octopus, which possessself-healing and robust adhesion properties in dry/underwater conditions.To implement autonomously self-healing octopus-inspired architectures, adynamic polymer reflow model based on structural and material design suggestscriteria for three-dimensional patterning self-healing elastomers. In addition,self-healing multi-layered microstructures with different moduli endowsefficient self-healing ability, human-friendly reversible bio-adhesion, and stablemechanical deformability. Through programmed molecular behavior ofmicrolevel hybrid multiscale architectures, the bioinspired adhesive patchexhibited robust adhesion against rough skin surface under both dry andunderwater conditions while enabling autonomous adhesion restoring performanceafter damaged (over 95% healing efficiency under both conditions for24 h at 30℃). Finally, we developed a self-healing skin-mountable adhesiveelectronics with repeated attachment and minimal skin irritation by laminatingthin gold electrodes on octopus-like structures. Based on the robust adhesionand intimate contact with skin, we successfully obtained reliable measurements during dynamic motion under dry, wet, and damagedconditions.
