Wonkyeong Son

Shape-Controlled Poly(N-isopropylacrylamide) Actuators Enabled by Tensile-Stress Mismatch for Temperature-Adaptive Textiles

Seokkan Ki, Jun Yeong Lee, Jung Gi Choi, Gyu Hyeon Song et autres

Thermal comfort is a key determinant of human health and requires adaptive responses to dynamic environments. Here, we report a temperature-adaptive textile enabled by a tensile stress mismatch-driven poly(N-isopropylacrylamide) (PNIPAM) actuator operating within a human-friendly temperature range of 18–38 °C. A pre-stretched …

kr, us (code pays fourni par la source)

Hierarchically Chiral Self‐Plied Yarn for Torsional Stability and Self‐Recovery, and Its Application to Direction‐Selective, Low‐Frequency, Wide‐Range Mechano‐Electrochemical Torsional Sensor

Hyunsoo Kim, Youngkun Hong, Seonghyun Kim, Wonkyeong Son et autres

ABSTRACT We report a hierarchical chiral self‐plied carbon nanotube yarn torsional sensor featuring a torque‐balanced rocking design that enables stable, self‐standing operation without external constraints. The hierarchical chiral structure establishes a torque‐balanced state through the interplay between filament torque and interply counter‐torque, …

us, kr (code pays fourni par la source)

Fully stretchable hydrovoltaic cells based on winding-locked double-helical carbon nanotube fibers

Wonkyeong Son, Jae Myeong Lee, Hyunji Seo, Gyu Hyeon Song et autres

Hydrovoltaic power generators that convert water–nanomaterial interactions into electricity represent a promising route for sustainable energy harvesting. However, most previous studies have relied on non-stretchable planar designs, requiring continuous water flow or ionic solutions. Here, we present a fully stretchable hydrovoltaic cell …

kr (code pays fourni par la source)

µm‐Thick and Water‐Taping Protein Electronic Tattoos for Multifunctional On‐Skin Electronics

Soohoon Lee, Wonkyeong Son, Shalik Ram Joshi, Changsoon Choi et autres

Seamless integration between on-skin electronics and the skin is crucial for advanced personalized diagnostics, therapeutics, and human-machine interfaces. The challenge lies in creating an ideal interface that directly connects thin-film electronics with soft skin, ensuring both free skin respiration and stable device …

kr (code pays fourni par la source)

Fully Stretchable Hydrovoltaic Cells Based on Winding-Locked Double-Helical Carbon Nanotube Fibers

Wonkyeong Son, Jae Myeong Lee, Hyunji Seo, Sung Beom Cho et autres

kr (code pays fourni par la source)

Stretchable Micro-Wrinkled Carbon Nanotube-Assembled Skin-Adhesive Patches with Suction-Cup Patterns for Human Breath-Derived Moisture Energy Harvesting

Wonkyeong Son, Jeeeun Kim, Tae Young Kim, Jae Myeong Lee et autres

With significant advances in self-powered, stretchable, and skin-attachable electronics, harvesting energy from ubiquitous moisture has emerged as a promising method for powering wearable and adhesive devices. However, current moisture energy harvesting (MEH) devices still face challenges in direct application to skin surfaces, …

kr (code pays fourni par la source)

Dual‐Scale Hydration‐Induced Electrical and Mechanical Torsional Energy Harvesting in Heterophilically Designed CNT Yarns

Jae Myeong Lee, Wonkyeong Son, Myoungeun Oh, Duri Han et autres

Abstract Water holds vast potential for a useful energy source, yet traditional approaches capture only a fraction of it. This study introduces a heterophilically designed carbon nanotube (CNT) yarn with an asymmetric configuration. This yarn is capable of both electrical and mechanical …

kr, hk (code pays fourni par la source)

Leveraging Inter‐Bundle Anchoring Effect to Induce Static and Dynamic Twist‐Stability in Multifunctional Carbon Nanotube Coiled Yarn Hydro‐Actuators

Jae Myeong Lee, Gichan Jeon, Wonkyeong Son, Sungwoo Chun et autres

Abstract Carbon nanotube (CNT) coiled yarns have revolutionized 1D yarn actuators. However, their intrinsic twist‐instability poses significant challenges, limiting their practical applicability. In this study, static and dynamic twist‐stability are imparted to CNT coiled‐yarn hydro‐actuators by leveraging the inter‐bundle anchoring effect. An …

kr (code pays fourni par la source)

Structurally Aligned Multifunctional Neural Probe (SAMP) Using Forest‐Drawn CNT Sheet onto Thermally Drawn Polymer Fiber for Long‐Term In Vivo Operation (Adv. Mater. 27/2024)

Woojin Jeon, Jae Myeong Lee, Yeji Kim, Yunheum Lee et autres

Structurally Aligned Multifunctional Neural Probe A fabrication method of integrating CNT sheet electrodes with drawing induced unidirectionality and thermally drawn polymer fibers are employed for innovative neural interfaces. In article 2313625, Changsoon Choi, Seongjun Park, and co-workers report on the novel neural …

kr (code pays fourni par la source)

Synergistic effect of microscopic buckle and macroscopic coil for self-powered organ motion sensor

Hyeon Jun Sim, Wonkyeong Son, Jae Myeong Lee, Dong Yeop Lee et autres

kr (code pays fourni par la source)

Hierarchical mesh-type oxygen electrode using carbon nanotube framework for anion-exchange membrane-based unitized regenerative fuel cells

Kyungbeen Yeom, Sungeun Heo, Yoojin Shin, Ju Wan Kim et autres

kr (code pays fourni par la source)

Structurally Aligned Multifunctional Neural Probe (SAMP) Using Forest‐Drawn CNT Sheet onto Thermally Drawn Polymer Fiber for Long‐Term In Vivo Operation

Woojin Jeon, Jae Myeong Lee, Yeji Kim, Yunheum Lee et autres

Neural probe engineering is a dynamic field, driving innovation in neuroscience and addressing scientific and medical demands. Recent advancements involve integrating nanomaterials to improve performance, aiming for sustained in vivo functionality. However, challenges persist due to size, stiffness, complexity, and manufacturing intricacies. …

kr (code pays fourni par la source)