https://scholar.dgist.ac.kr/handle/20.500.11750/906 2026-06-24T08:43:43Z https://scholar.dgist.ac.kr/handle/20.500.11750/60417 Title: Multifunctional Sweat Sensors Using Semiconductor Fibers Based on Two-Dimensional Nanomaterials Author(s): Park, Jun Hyun; Park, Jae Woo; Choi, Min Seok; Pang, Sang Uk; Choe, Jun Seok; Yu, Tae Sang; Jang, Kyung-In; Kim, Jin-Tae; Chung, Ha Uk; Kim, Jang Hwan; Kim, Bong Hoon Abstract: Sweat monitoring offers real-time insights into physiological conditions such as hydration, muscle fatigue, and metabolic status. However, conventional sweat sensors often face challenges associated with unstable skin contact and insufficient sampling. In this study, a fiber-based wearable sensing platform is proposed, which incorporates semiconducting molybdenum disulfide (MoS2) and polylactic acid (PLA) composite fibers fabricated via wet spinning. By exploiting the high surface-to-volume ratio and n-type semiconducting nature of the MoS2 network, the sensor selectively detects major biomarkers including electrolytes (Na+ and K+) and metabolites (lactic acid and NH4+) via distinct electrostatic screening and charge trapping mechanisms. Furthermore, the intrinsic capillary action and thermal insulation of the fibers ensured reliable sweat collection without the requirement for external power. Additionally, the composite fiber exhibits piezoresistive capabilities, enabling simultaneous pressure monitoring to track physical motion. Multifunctional sensing facilitates the early diagnosis of metabolic disorders and the precise tracking of athletic performance. The developed fiber-based sensor provides a robust textile-integrated solution for next-generation personalized healthcare monitoring. © 2026 The Author(s). Small Structures published by Wiley-VCH GmbH. 2026-02-28T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/60416 Title: Structurally engineered ultrasoft PEDOT:PSS fiber microelectrodes with enhanced electrochemical performance for neural interfaces Author(s): Won, Chihyeong; Cho, Young Uk; Kweon, Siyeon; Cho, Sungjoon; Kwon, Chaebeen; Kim, Hyun Woo; Lee, Ju Young; Park, Sang Hoon; Han, Sorim; Kim, Yang Tae; Jang, Jumyoung; Jekal, Janghwan; Kim, Jae Geun; Jang, Kyung-In; Xu, Sheng; Gao, Wei; Cho, Il-Joo; Yu, Ki Jun; Lee, Taeyoon Abstract: Stable and reliable neural interfacing is essential for the diagnosis and treatment of chronic neurological disorders. Flexible neural probes are particularly important for this purpose, as they minimize tissue damage and inflammatory responses while maintaining stable electrode-tissue coupling; however, achieving both high electrical performance and tissue-like mechanics remains challenging. Here, we present a poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) fiber microelectrode (PFME), an all-organic neural probe capable of recording single-neuron activities with potential for long-term interfacing. The PFME is entirely composed of organic components and fabricated without thermal processing. In addition, the posttreatment process enables to selectively remove PSS binder networks while promoting PEDOT chain alignment to optimize mechanical compliance and electrochemical performance. In vivo, the PFME enables stable single-unit recordings from the mouse hippocampus. Histological analysis after 1 week of implantation reveals minimal glial activation comparable to that elicited by a conventional probe. This structurally engineered PFME establishes a pathway to achieve minimally invasive neural interfacing platforms for chronic applications. 2026-04-30T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/60315 Title: 압전소자 및 압전소자 제조방법 Author(s): 금호현; 예준우; 장경인 Abstract: The disclosure provides a piezoelectric element and a method for manufacturing a piezoelectric element. The disclosure provides the piezoelectric element comprising: a base layer, a piezoelectric layer which is disposed on one surface of the base layer, and in which upwardly curved convex portions and downwardly curved concave portions are continuously disposed along a first direction; and contact members which are disposed on the concave portions of the piezoelectric layer and on the one surface of the base layer to connect the piezoelectric layer to the base layer. https://scholar.dgist.ac.kr/handle/20.500.11750/59915 Title: Stretchable p/n-Pair Thermoelectric Fibers Based on Core (Ag)-Shell (Ag2Se) Structure for Wearable Electronics Author(s): Kwon, Chaebeen; Lee, Sanghyeon; Cho, Sungjoon; Won, Chihyeong; Kim, Byeonggwan; Jang, Kyung-In; Lee, Taeyoon Abstract: The development of stretchable p/n-pair thermoelectric (TE) fibers holds significant promise for multifunctional wearable electronics, yet remains challenging due to complex processing and limited mechanical durability. Here, a novel strategy is presented for the facile fabrication of stretchable Ag@Ag2Se-based TE fibers using a selective in situ chemical reduction process, eliminating the need for thermal treatment or specialized equipment. The resulting fibers feature a robust core-shell architecture, with conductive Ag cores and n-type Ag2Se shells, achieving a Seebeck coefficient of -96.75 mu V K-1 under 100% strain and stable electrical conductivity under 200% strain. Notably, the fibers exhibit excellent cyclic stability with Delta V/V0 maintained within 1.75% under mechanical deformation. When patterned into p/n-pair arrays through localized chemical treatment, the fibers function as efficient energy harvesters and strain/temperature sensors. Integrated into wearable platforms, these fibers demonstrate simultaneous mechanical and thermal sensing and effective energy harvesting from body heat. This work establishes a versatile platform for scalable, miniaturized, and multifunctional TE fiber systems, advancing the future of smart textiles and wearable electronics. 2026-02-28T15:00:00Z