https://scholar.dgist.ac.kr/handle/20.500.11750/11790 2026-10-27T07:04:39Z https://scholar.dgist.ac.kr/handle/20.500.11750/60989 Title: All Bio-Based Noncorrosive Hygroscopic Hydrogel Enables Passive Cooling of Electronic Devices Author(s): Kim, Hyeondo; Hwang, Deok Jun; Kim, Na Kyung; Kang, Taewon; Kim, Soobeen; Kim, Seong Kyun Abstract: The emergence of artificial intelligence (AI) technologies has greatly increased the importance of thermal management in electronic systems. Conventional cooling strategies require substantial amounts of coolant, particularly water, whose demand is rapidly increasing. Here, we propose a sorption-based passive evaporative cooling system using an all-nature-derived hygroscopic polymer film, which can supplement conventional cooling systems and substantially reduce their energy consumption. In a simulated laboratory-scale demonstration, the system achieved a maximum cooling power of (), with a maximum temperature reduction of 18.2 degrees C. The cooling performance was also maintained during repeated cyclic simulations. In addition, the incorporation of an organic ionic liquid as a hygroscopic component, instead of conventional metal salts, endowed the film with excellent flexibility, elongation, adhesiveness, and noncorrosive properties. Therefore, the proposed sorption-based passive cooling system holds great potential for assisting conventional electronic cooling systems while significantly reducing energy demand. 2026-08-31T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/59057 Title: A Water-Efficient Artificial Phytoextraction Technology for the Remediation of Cesium-Contaminated Soil Inspired by Plant Transpiration and the Hydrologic Cycle Author(s): Kim, Soobeen; Hwang, Deok Jun; Kim, Hyeondo; Lim, Hongsub; Kim, Seong Kyun Abstract: Cesium ions (Cs+) are notable radioactive contaminants hazardous to humans and the environment. Among various remediation methods, adsorption is a practical way to remove Cs+ from water, and Prussian blue (PB) is well-known as an efficient Cs+ adsorbent. Although various PB derivatives have been proposed to treat Cs+-contaminated water, soil remediation is still challenging due to the limited mobility of pollutants in soil. Here, we proposed a water-efficient artificial phytoextraction system integrated with a plant-like interfacial solar vapor generation (ISVG) device for remediation of Cs+-contaminated soil. The leaf of the device consisting of PB immobilized on cellulose nanofiber (CNF-PB) endows the device with the abilities of accumulation of Cs+ as well as solar-to-thermal conversion for water evaporation. The proposed remediation system showed significant Cs+ removal ability from contaminated agricultural soil under actual sunlight, with no additional water required due to the system's water-recycling capability. The device can be readily revived by replacing the Cs+ accumulated leaf with a new one, and the used adsorbent can be easily regenerated by acid washing for reuse. Thus, the proposed system is a sustainable, fast, and eco-friendly soil remediation strategy for Cs+ contamination. 2025-08-31T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/58847 Title: 3차원 구조의 태양광 증발 소자(3D Interfacial solar vapor generator) 및 이의 제조 방법, 이를 포함하는 태양 증류기(Solar Still) Author(s): 김성균; 임홍섭 Abstract: 본 발명은 3차원 구조의 태양광 증발 소자(3D Interfacial solar vapor generator) 및 이의 제조 방법, 이를 포함하는 태양 증류기(Solar Still)를 개시한다. 본 발명은 처리수가 담지된 컨테이너(container); 및 상기 컨테이너에 수직 방향으로 배치된 적어도 하나 이상의 1차원 천연 섬유 코드(1D natural fiber cord)를 포함하고, 상기 적어도 하나 이상의 1차원 천연 섬유 코드는 광열 물질이 코팅된 광열 코팅부를 포함하는 것을 특징으로 한다. https://scholar.dgist.ac.kr/handle/20.500.11750/58843 Title: 3D INTERFACIAL SOLAR VAPOR GENERATOR, METHOD FOR MANUFACTURING SAME, AND SOLAR STILL COMPRISING SAME Author(s): 김성균; 임홍섭 Abstract: The present invention provides a 3D interfacial solar vapor generator, a method for manufacturing same, and a solar still comprising same. The present invention comprises: a container containing treated water; and at least one 1D natural fiber cord arranged vertically in the container, wherein the at least 1D natural fiber cord includes a photothermal coating portion coated with a photothermal material.