https://scholar.dgist.ac.kr/handle/20.500.11750/11765 Wed, 14 Oct 2026 23:15:13 GMT 2026-10-14T23:15:13Z https://scholar.dgist.ac.kr/handle/20.500.11750/60950 Title: Geometry-driven multimodal tactile sensors with high-fidelity perception enabled by strain-invariant oxidized liquid metal electrodes Author(s): Woo, Huidam; Lee, Jeeeun; Kim, Jisu; Kim, Jinho; Shin, Minchang; Kim, Jimin; Kim, Hwajoong; Yun, Dongwon; Lee, Jaehong Abstract: Multi-axis tactile sensors that simultaneously resolve normal and shear forces are indispensable for dexterous robotic manipulation and human-robot interaction. Capacitive platforms, however, suffer from microcrack-induced resistance fluctuations in conventional electrodes, which corrupt RC time constants and degrade signal fidelity under repeated deformation. Here, we introduce a geometry-driven multimodal capacitive tactile sensor employing oxidized liquid metal (O-LM) electrodes whose near-invariant conductivity eliminates this instability. An anisotropically offset 2 & times; 2 capacitor array decouples normal and shear components through purely geometric means, while a micro dome-pyramid hierarchical dielectric architecture yields a sensitivity of 3.14 & times; 10-3 kPa-1 over a 0-160 kPa range. Integrated onto a robotic gripper, the sensor enables real-time three-axis force mapping during object grasping and dynamic manipulation, demonstrating that a geometry-driven capacitive design can achieve reliable multimodal tactile perception for practical robotic applications. Fri, 31 Jul 2026 15:00:00 GMT https://scholar.dgist.ac.kr/handle/20.500.11750/60950 2026-07-31T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/60514 Title: Highly Conductive and Stretchable Photothermal CuSe Fiber for Wearable Electronics and Implantable Drug Release Systems Author(s): Yoon, Kukro; Lee, Yukye; Rhee, Sang Ki; Park, Hyeonjoo; Kang, Kyowon; Sang, Mingyu; Kim, Byeonggwan; Lee, Jung Seung; Lee, Jaehong; Lee, Taeyoon Abstract: Recently, fiber electronics have emerged as promising platforms for next-generation wearable and biomedical systems because of their flexibility, light weight, and softness. Among them, photothermal fibers are particularly attractive for therapeutic applications because of their remote and localized heat generation. However, most existing photothermal fibers rely on near-infrared (NIR)-I-responsive materials, which exhibit shallow tissue penetration and limited efficiency, thereby restricting their applicability in tissue implantation. In this study, a stretchable photothermal copper (II) selenide (CuSe) fiber was fabricated via a simple solution-based synthesis. Owing to the uniformly embedded CuSe nanoplates within the polyurethane matrix, the fabricated CuSe fiber exhibits high electrical conductivity (3.419 S/cm), excellent stretchability (100% tensile strain), and stable heating up to 81.7 degrees C under NIR-II irradiation. When integrated into textiles, the fiber can function as both a reliable strain sensor (gauge factor = 28.88) and a wearable heater (photothermal conversion efficiency = 40.1%). In addition, an implantable NIR-triggered drug release fiber was developed by coating the prepared CuSe fiber with a thermo-responsive hydrogel, achieving photothermal-triggered drug release and exhibiting therapeutic efficacy in mice with lipopolysaccharide-induced sepsis. Overall, the developed NIR-II-responsive CuSe photothermal fiber provides a versatile and clinically relevant platform for next-generation wearable and biomedical systems. Thu, 30 Apr 2026 15:00:00 GMT https://scholar.dgist.ac.kr/handle/20.500.11750/60514 2026-04-30T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/59953 Title: All-textile, chip-less, battery-free body sensor networks enabled by a concentric multi-node hub antenna architecture Author(s): Lee, Junyeong; Lee, Mugeun; Kim, Jinho; Kim, Hwajoong; Yu, Jongbin; Kim, Namjung; Lee, Jaehong Abstract: Textile-based, chip-less, wireless body sensor networks (WBANs) offer continuous, wireless monitoring of physiological signals from passive sensors distributed across body locations, representing a promising solution for daily wearable sensing. Here, we introduce an all-textile, chip-less, and battery-free textile-based body sensor network (tBSN) capable of simultaneously monitoring multiple passive sensors across the body. The tBSN is seamlessly integrated into conventional textiles via digital embroidery of flexible conductive fiber electrodes. Single-node tBSN exhibits robust wireless transmission over interconnect up to 40 cm and demonstrates durability under various conditions. By arranging multiple single-node sensor networks into a concentric multi-hub antenna architecture, we extend the system to a multi-node tBSN, enabling simultaneous wireless monitoring of distributed passive sensors within a single frequency scan. A wearable garment incorporating the multi-node tBSN tracked biomechanical signals from the vastus lateralis and knee joint during motion, highlighting its significant potential for personalized rehabilitation, fitness-assistive technologies, and advanced gait analysis. Fri, 31 Oct 2025 15:00:00 GMT https://scholar.dgist.ac.kr/handle/20.500.11750/59953 2025-10-31T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/59033 Title: Advances and perspectives in fiber-based electronic devices for next-generation soft systems Author(s): Kim, Hwajoong; Kim, Daehyeon; Kim, Jinho; Lee, Yukye; Shin, Minchang; Kim, Jimin; Bossuyt, Fransiska M.; Lee, Gun-Hee; Lee, Byeongmoon; Taylor, William R.; Lee, Jaehong Abstract: Fiber-based electronic devices (FEDs) exhibit high flexibility, low weight, and excellent integrability into wearable, implantable, and robotic systems. Recent advances have enabled applications in sensing, energy harvesting, and storage, and active functions. Despite this progress, challenges such as mechanical fatigue, interfacial delamination, and signal instability remain. This review offers key challenges and perspectives on the future of FEDs as interactive, autonomous platforms for next-generation electronics in healthcare, robotics, and beyond. Thu, 31 Jul 2025 15:00:00 GMT https://scholar.dgist.ac.kr/handle/20.500.11750/59033 2025-07-31T15:00:00Z