UOS News
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- Published as a Supplementary Cover article in ACS Nano: Securing a key technology for next-generation AI, aerospace, and ultra-low-power semiconductors - Achieves ultra-low resistance approaching the quantum contact limit through precise plasma control The research team led by Professor Taewan Kim of the Intelligent Semiconductor Major, School of Advanced Fusion Studies at the University of Seoul, in collaboration with the team of Professor Hyo-Chang Lee of Korea Aerospace University, announced that their research paper, “Plasma Knowledge-Based Polymorphic Engineering for Two-Dimensional Semiconductor Contacts,” has been published as a Supplementary Cover article in ACS Nano (IF: 16.1, top 6% in JCR), a globally renowned journal in nanoscience. The research team systematized, for the first time in the world, a “plasma knowledge-based polymorphic process” technology capable of fundamentally resolving the high contact resistance issue that has hindered the commercialization of two-dimensional transition metal dichalcogenide (2D TMD) semiconductors. While conventional plasma processes have relied on empirical parameter tuning, the team quantitatively measured internal physical parameters such as plasma ion density and self-bias voltage and, based on these measurements, proposed a new process framework that
대외협력과 25 2026-04-14
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- Realization of phase transitions through modulation of electron–electron interactions in oxide heterostructures: Outcome of an international collaborative study - Gaining attention as a core operating principle for next-generation AI semiconductor devices The research team led by Professor Young Jun CHANG of the Department of Physics at the University of Seoul, in collaboration with Dr. Eli Rotenberg of Lawrence Berkeley National Laboratory in the United States, successfully realized a Mott metal–insulator transition solely through the modulation of electron–electron interactions in lanthanum titanium oxide (LaTiO₃) heterostructure thin films. The research findings were published in the January 2026 issue of Communications Materials, a sister journal of Nature (Impact Factor: 9.6). This study is considered the first demonstration of a Mott transition induced solely by the precise control of on-site Coulomb interactions, achieved through the modulation of thin-film thickness and associated changes in charge transfer and lattice structure, rather than by external stimuli such as doping, temperature, or pressure. Using experimental techniques including angle-resolved photoemission spectroscopy and electron diffraction, together with first-principles calculations, the research team systematically analyze
대외협력과 52 2026-04-08
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- The research team led by Professor Young Jun CHANG of the Department of Physics at the University of Seoul maximizes catalytic activity through electrochemical surface modulation - Oxygen evolution reaction performance significantly enhanced using iridium chalcogenide thin films The University of Seoul announced in January 2026 that the research team led by Professor Young Jun CHANG of the Department of Physics successfully maximized the catalytic activity of the oxygen evolution reaction (OER) by precisely controlling the surface oxidation state of thin films of iridium telluride (IrTe2₂), a two-dimensional transition-metal chalcogenide. This research was conducted as a collaborative study with Pohang Accelerator Laboratory, Chung-Ang University, the National NanoFab Center, and Sweden’s MAX IV synchrotron light source facility. The results were published in the January 2026 issue of ACS Catalysis (Impact Factor: 13.1), a world-renowned academic journal in the field of catalysis. In this study, a method was proposed to control the formation of active intermediates (Ir–OH, Ir–OO, Te–OH) and reaction pathways through electrochemical oxidation modulation of high-quality two-dimensional iridium telluride thin films synthesized using a vacuum thin-film deposition system. In particular, the study id
대외협력과 63 2026-04-01
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– MHz-speed long-range wireless optical communication enabled by an ultra-thin, ultra-flexible near-infrared sensor – Published in Nature Communications, demonstrating a technological advance in ultra-thin organic photodetectors A research team led by Professor Hyeok Kim (School of Electrical and Computer Engineering; Department of Intelligent Semiconductor Engineering) at the University of Seoul has developed a 3μm ultra-thin, ultra-flexible near-infrared optical sensor, presenting a strategy for multi-angle, long-range wireless optical communication that overcomes the limitations of conventional organic photodetectors. This technology enables the uninterrupted reception of invisible light signals from distances of up to 100 m using a single thin, skin-attachable film. Even when applied to finely curved skin surfaces—such as the subtle wrinkles of a fingertip—the sensor can reliably capture optical signals without fluctuation, regardless of the angle of incidence. Consequently, it opens up new possibilities for next-generation wearable communication and healthcare technologies. The newly developed optical sensor achieves high-speed and high-sensitivity performance, stably receiving data at speeds of up to 1 MHz across a wide range of incident angles and detecting optically modulated audio signals even a
대외협력과 263 2026-03-09
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- Accelerate commercialization by controlling quantum dot crystal arrays and enhancing charge transport with conjugated polymer ligands A research team led by Professor Min Kim of the Department of Chemical Engineering at the University of Seoul (Lead authors: Tae Oh Yoon, Shabaz Alam, and Dohun Baek), in collaboration with Professor Jaeyoung Jang of Hanyang University and Professor Jaewon Lee’s research team at Chungnam National University. The collaborative research paper, titled “Conjugated Polymer-Driven Compact Crystal Packing and Efficient Charge Transport in Perovskite Quantum Dot Solar Cells,” was published as a frontispiece in Small, leading international journal in nanoscience and materials science (Impact Factor 12.1, top 8.7% in JCR). The joint research team designed a novel conjugated polymer ligand with an ethylene glycol side chain, implementing a strategy that enables precise control of quantum dot crystal arrays through polymer backbone bonding while strongly interacting with the perovskite quantum dot (PQD) surface. This demonstrates that the conjugated polymer effectively stabilizes defects on the quantum dot surface while simultaneously enhancing the dense arrangement and electron coupling between quantum dots, thereby significantly improving charge transport pathways. Unlike conventio
대외협력과 284 2026-01-15
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- Only 7 of 155 universities nationwide earned a Grade A in recognition of both research support capabilities and systematic approaches The University of Seoul has been rated a Grade A institution in the 2025 Research Support System Evaluation conducted by the Ministry of Science and ICT (MSIT) and the Korea Institute of Science and Technology Evaluation and Planning (KISTEP). This outcome is a significant achievement that is particularly notable because the University of Seoul has achieved a Grade A for the second consecutive time, once again demonstrating the excellence of its research support system. The Research Support System Evaluation is a comprehensive assessment conducted biennially by the MSIT and KISTEP upon universities that voluntarily apply. Its purpose is to strengthen the systematic and professional nature of university research support systems and ultimately establish a foundation for enhancing research outcomes. The most recent evaluation was conducted based on performance in the period March 2023 to February 2024. One hundred and fifty-five universities with research support functions participated in the assessment, but only seven achieved a Grade A. Among these top-tier universities was the University of Seoul, which has been recognized for its outstanding performance in overall research suppo
대외협력과 297 2025-12-12
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- "Climate change is a shared crisis for humanity" – Emphasizing the role of urban policy and international solidarity - Over 300 participants, including overseas civil servant trainees; expanding the urban cooperation network The University of Seoul announced on November 22nd that it held a special lecture delivered by former United Nations (UN) Secretary-General Ban Ki-moon on Climate Change and the International Community's Response at the Grand Conference Hall of the Natural Sciences Building on Friday, November 21st, 2025, to commemorate the 100th Urban Infrastructure Forum. The lecture was delivered in a hybrid online–offline format and was attended by approximately 300 participants, including civil servants from developing countries, who engaged in training programs, alongside undergraduate and graduate students. This event was co-hosted by the University of Seoul’s International School of Urban Sciences (Dean: Shin Lee) and the University of Seoul Environmental, Social, and Governance Committee. The Urban Infrastructure Forum has been held monthly since 2013 and is thus a flagship academic event of the University of Seoul. It addresses key issues in urban development, the environment, and international cooperation, thereby providing a platform for domestic and international experts and practitioners
대외협력과 306 2025-12-12
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- This research introduces a new approach to suppressing aging by stabilizing chromatin structure. The research team, led by Professor Hyunsung Park from the Department of Life Sciences at the University of Seoul, reported an epigenetic mechanism in which a hypoxic microenvironment delays cellular aging. These findings appeared in Nucleic Acids Research (2024 Impact Factor 13.1, top 4.06% in JCR field). The first author of this paper is Dr. Soojeong Chang, who earned her Ph.D. from the Department of Life Sciences at the University of Seoul, and the corresponding author is Professor Hyunsung Park. It has been observed that cell division is suppressed and cellular aging is delayed in low-oxygen environments, which are often found within tumor tissues or bone marrow; however, the underlying molecular mechanism has remained unclear. In this study, the research team found that histone methylation increases in hypoxic environments. This increase inhibits histone cleavage by Cathepsin L, which prevents the collapse of higher-order chromatin structures and suppresses aging. In collaboration with Professor Sang-Won Lee's team at Korea University, the team conducted top-down proteomics analysis. This led to the first identification of new cleavage sites on H2B and H4 that were previously unknown in the Raf-induced agi
대외협력과 293 2025-12-12
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- The team developed a novel data imputation model, “U-VAE,” which accounts for missing value uncertainty The University of Seoul announced that a paper written by the research team led by Professor Jong-June Jeon from the Department of Statistics and Data Science has been accepted for the Main Technical Track of the Association for the Advancement of Artificial Intelligence (AAAI) 2026, the premier international conference on AI. AAAI is a globally authoritative academic conference on AI, registered as a BK Excellent International Academic Conference (recognized IF 4.0). This year’s conference saw high competitiveness, with approximately 31,000 papers submitted and only 4,167 accepted. The 2026 AAAI Conference is scheduled to be held at the Singapore Expo from January 20 to January 27, 2026. The accepted paper, “Impute Missing Entries with Uncertainty,” presents a novel, more sophisticated approach to address the problem of missing data, which inevitably occurs during actual data collection. Missing data have various causes, such as non-response of participants, omission of medical records, and measurement errors. They are not merely blank spaces, but fundamental sources of uncertainty that undermine the reliability of statistical analysis. While various single and multiple imputation techniques have b
대외협력과 670 2025-12-10
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- This research challenges the conventional understanding of inverse probability weighting (IPS) and newly identifies the cause of performance improvements in recommended models. The University of Seoul announced that a paper by Professor Jong-June Jeon’s research team, titled "Revisiting IPS in Recommendation Models: Unveiling Its Impact on Model Performance," has been accepted for presentation at WSDM (Web Search and Data Mining) 2026, one of the world's most prestigious international conferences in data mining and machine learning. WSDM, organized by the Association for Computing Machinery (ACM), is one of the leading international conferences in web search, recommendation, and data mining. It presents the latest research in search and data mining across the web and social web. Recognized as a top-tier conference by both the National Research Foundation of Korea and the Korean Institute of Information Science and Technology, it receives thousands of submissions each year and maintains a highly competitive acceptance rate of about 15–20%. ▶ The Selection Bias Problem in Recommender Systems and the Proposed Methodology The accepted paper offers a new perspective on the effectiveness of IPS, which is widely used to address selection bias in recommender systems. The research team showed theoretically that, w
대외협력과 345 2025-12-10
