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- [Faculty] National Research Foundation appoints Prof. Yoo as Director of the National Strategic R&D Programs directorate
- National Research Foundation appoints Prof. Ji Beom Yoo as Director of the National Strategic R&D Programs directorate Director Ji Beom Yoo [Source: National Research Foundation (NRF) The National Research Foundation appointed Prof. Ji beom Yoo as the director of the National Strategic R&D Programs directorate.Director Yoo Ji-beom will be in charge of managing and evaluating ▷ academic and R&D support projects entrusted by the government ▷ proposing and consulting projects, budget allocation and execution ▷ promoting performance ▷ research trend investigation & analysis. http://news.heraldcorp.com/view.php?ud=20220118000063
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- 작성일 2022-01-26
- 조회수 1108
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- [Faculty] Prof. Hyun Suk Jung wins 2021 MSIT Minster’s award for his achievements in tackling climate change
- Prof. Hyun Suk Jung wins 2021 MSIT Minster’s award for his achievements in tackling climate change -Facilitated solar cell commercialization via securing original technology -Contributed to national technological competitiveness by developing eco-friendly solar cell recycling technology Ministry of Science and ICT (National Research Foundation of Korea) selected perovskite solar cell process technology developed by Professor Hyun Suk Jung as one of the top 10 promising technologies for tackling climate change in 2021. At the '2021 Climate Change Response Technology Top 10 Performance Sharing and Awards', Prof. Hyun Suk Jung was honored for his contribution in commercializing sustainable solar cells and enhancing national technological competitiveness by registering multiple patents. Professor Jung successfully procured the perovskite solar cell production technique through numerous studies regarding large-area coating process technology and modularization. Professor Jung's findings are expected to enhance national competitiveness in cutting-edge optical energy devices and thereby lead to the advancement of innovative materials and energy devices on the whole. Experts appraised that the findings would ease South Korea's dependence on overseas technologies and further facilitate Korea's leadership in the future solar cell market as the recycling technology mitigates the environmental hazards of solar cells. Professor Jung said, "I give the credits to the graduate students, researchers, and fellow professors who have been striving to this far," adding, "I would like to thank Sungkyunkwan University for the constant support. I will continue to do my best to improve our nation's wellness in the field of science and technology by dedicating myself to research and education." Large-area Perovskite Coating Processing Technology ▽ Perovskite Solar Cell Recycling Technology ▽ https://www.skku.edu/skku/campus/skk_comm/news.do?mode=view&articleNo=94537&article.offset=0&articleLimit=10
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- 작성일 2022-01-26
- 조회수 995
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- [Research] Prof. Joohoon Kang’s research team develops Ternary operator applying area-selective chemical doping
- Prof. Joohoon Kang’s research team develops Ternary operator applying area-selective chemical doping - State-of-the-art semiconductor system which overcomes limitations of binary logic [Image] Dr. Dongjoon Rhee, Prof. Joohoon Kang, Master's candidate Myeongjin Jung, and Ph.D. Candidate Jihyun Kim (Clockwise from the left) Prof. Joohoon Kang’s research team (First authors; Jihyun Kim & Myeongjin Jung) developed a cutting-edge semiconductor device that enables ternary operation. Lately, the increasing demand for AI, self-driving, and IoT, the core technology of the 4th industrial revolution, has urged the need for large-scale information processing technologies and the development of high-performance semiconductors. Binary-based semiconductor devices that process information with 0 and 1 have physical limits to improve the integration. Therefore, multiple-valued logic systems have been suggested as an alternative to meet conditions such as shorter information processing time, higher performance, and lower power consumption. A conventional multiple-valued logic system was fabricated by forming two or more threshold voltages through combining semiconductor materials with heterogeneous work function values. However, there have been challenges in enlarging it due to low productivity when combining heterogeneous materials elaborately. [figure] Schematic of the system structure To cope with this, the research team developed multi-valued logic gates by forming large-area elemental semiconductor material film with solution processing method. Through area-selective chemical treatment, the team formulated regions with different work function on two-dimensional MoS2, the next-generation semiconductor material, and sequentially operated them to process ternary logical systems with stability. In addition, the team confirmed that various logical operations for large-scale information processing are also stably driven using the ternary device. “I expect the system to be applied in the semiconductor industry in the near future, in that the developed structure enables fabrication of large-area multiple-valued logic devices in wafer units without major changes in the conventional process.” Prof. Kang added. The team plans to design the optimum semiconductor material compound and apply this technology to subsequent multiple-valued logic studies to surpass the ternary logic system. This study was supported by National Research Foundation of Korea (NRF) grants funded by the Korean Government (MSIT) (2020R1C1C1009381 and 2020R1A4A2002806) and the Korea Basic Science Institute (KBSI) National Research Facilities and Equipment Center (NFEC) grant funded by the Korean Government (Ministry of Education) (2019R1A6C1010031). ※ Paper: Area-Selective Chemical Doping on Solution-Processed MoS2 Thin-Film for Multi-Valued Logic Gates https://www.skku.edu/skku/campus/skk_comm/news.do?mode=view&articleNo=94442&article.offset=0&articleLimit=10
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- 작성일 2022-01-26
- 조회수 1493
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- [Research] Prof. Hyun Suk Jung and Prof. Jai Chan Lee’s research team develops highly efficient halide perovskite solar cell module
- Prof. Hyun Suk Jung and Prof. Jai Chan Lee’s research team develops highly efficient halide perovskite solar cell modules fabrication technology using Formamidine disulfide oxidant - Suggesting a new approach for high-efficiency, high-stability large-area solar cell modules for commercialization of perovskite solar cells [Figure 1] Prof. Hyun Suk Jung, Prof. Jai Chan Lee, and Prof. Tae Kyu Ahn (Department of Energy Science) Prof. Hyun Suk Jung (Co-first author: Ph.D. candidate Jun Zhu), Prof. Jai Chan Lee (Co-first author: Ph.D. candidate Seul Young Park)'s research team, in tandem with Prof. Tae Kyu Ahn(Department of energy science) developed a new technology that increases the energy conversion efficiency of solar cell modules by applying strong oxidant into halide perovskite materials. Halide perovskites are an ideal solar cell material that exhibits high light absorption, long diffusion lengths of the photoetched electron, and holes. Recently, the solar cells that applied halide perovskites are getting greater attention than the existing ones, showing higher power conversion efficiency. However, primary intrinsic defects in FAPbI3 (i.e., iodine vacancy) induce strong electron localization and become deep traps and recombination centers upon photoexcitation. Consequently, the carrier lifetime is significantly reduced, and the superior properties are not fully utilized. The research team used formamidine disulfide dihydrochloride (FASCl) to remove the localized electrons on the perovskite defects. FAS2+ ion, as a strong oxidant as well as electron scavenger, takes other materials’ localized electrons and oxidize. [Figure 2] (1) Schematic diagrams of the introduction of the recombination center in the band gap of FAPbI3 by the localized charge in the iodine vacancy. (2) Schematic diagrams of the suppression of electron localization in the iodine vacancy by the FAS2+ ion in FAPbI3 Applying the first-principle method, the research team revealed that formamidine disulfide ion prevents the formation of the defect complex by stably integrating into perovskite structure and making the iodine vacancy lose the strongly localized electrons. The research team demonstrated an increased carrier lifetime of electrons and holes on the fabricated perovskite structure based on this strategy. In addition, the introduced formamidine disulfide interacted with the perovskite precursor and formatted an intermediate, which can improve perovskite crystallinity, grain size and thus enhance the device's performance and stability. [Figure 3] (Image 3) is a solar cell module manufactured using perovskite to which formalamide disulfide is added. (Image 4) solar cell modules exhibiting very high energy conversion efficiency in Large-area. excellent efficiency of more than 20% in large solar cell modules as well as unit cells. We expect this study to present a new approach for the commercialization of perovskite solar cells in near future." The research team said. This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (No. 2019R1A2C2002661), the Institute of Information & Communications Technology Planning & Evaluation (IITP) grant funded by the Korean government (MSIT) (No. 2020-0-00541, Flexible Photovoltaic Device Module with Autonomous Power Supply for Smart Farm Wireless Composite IoT Sensor), Creative Materials Discovery Program through the National Research Foundation of Korea (NRF-2019M3D1A1078296 and NRF-2019M3D1A2104108) funded by the Ministry of Science and ICT, and the Basic Research Lab Program (2020R1A4A2002161) through the National Research Foundation of Korea. Computational resources were supported by KISTI supercomputing center (KSC-2020-CRE-0028). The research process was published on the Energy & Environmental science (IF 38.532) on July 30th (2021). ※ Paper title : Formamidine disulfide oxidant as a localised electron scavenger for >20% perovskite solar cell modules
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- 작성일 2022-01-26
- 조회수 1607
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- [Alumni] 김상우 교수님 연구실 김지혜 박사, 해외 박사후연구원 (GPF) 성공수기
- 글 : 김지혜 미국 노스웨스턴 대학교 박사후 연구원 ◈ 연수 소감 안녕하세요 저는 성균관대학교 신소재공학부 학사, 석·박사 학위를 수여받은 후 성균관대학교 BK21플러스 융복합소재 글로벌 인재양성 사업단에서 지원하는 ‘해외 포닥 연수 지원’을 받아 2020년 6월부터 2021년 5월까지 미국 노스웨스턴 대학교에서 박사후 연구원을 수행한 김지혜입니다. 석·박사 학위 과정 동안 성균관대학교 신소재공학부 김상우 교수님 연구실에서 마찰대전 발전소자에 대해 연구했으며, 에너지 소재 분야와 바이오 의료 전자기기 분야와의 융복합 연구를 진행하고 싶은 목표를 가지고 소프트 일렉트로닉스 분야의 세계적인 리딩 그룹인 미국 노스웨스턴 대학교 John A. Rogers 교수 그룹으로 박사후 연구를 수행하고 있습니다. 해외 포닥 연수 기간 동안 웨어러블/인체삽입형 바이오 소프트 의료기기 관련 연구를 미국 의과대학 및 병원 의료진과 함께 협업하여 수행하고 있습니다. 특히 노스웨스턴 대학교 의과대학과 신생아 중환자실 의료진과의 협업을 통해 산모·신생아를 위한 소프트 바이오 의료기기 개발 및 임상시험을 진행하고 있습니다. 또한 노스웨스턴 대학교 의과대학과 협업하여 인체삽입형 플렉서블/스트레쳐블 스트레인 센서를 개발하고 현재 동물 실험을 진행하고 있습니다. 미국에서 의과대학과의 협업 연구를 진행할 수 있는 연구 경험은 제게 매우 값진 경험이었으며, 소프트 바이오 의료기기 연구 분야를 선도하는 세계 최정상급 연구 성과 및 높은 사회적·경제적 파급력을 도출하고자 노력하고 있습니다. ▲ 연구실과 신생아를 위한 연구 제 인생에서 처음으로 해외에 살면서 연구를 할 수 있는 기회였는데, 연구 능력뿐 만 아니라 언어, 문화적 측면에서 다방면으로 많은 것을 배우고 느낄 수 있었습니다. 해외 포닥 연수를 지원해주신 성균관대학교 BK21플러스 융복합소재 글로벌 인재양성 사업단에 감사드리며, 세계 최정상 연구 그룹에서 연구를 할 수 있도록 지도해주신 석·박사 지도 교수님인 김상우 교수님께 진심으로 감사드립니다. ◈ 연수 이후의 direction 본 연수 기간을 마친 후 미국 노스웨스턴 대학교 John A. Rogers 교수 연구 그룹에서 박사후 연구원으로써 계속해서 연구를 진행하고 있으며, 세계 바이오 의료 전자기기 연구 분야를 선도하는 우수한 연구 성과를 도출하려는 계획을 가지고 있습니다. 최종적으로 박사후 연구원을 마친 후 한국으로 돌아가 미래 바이오 의료 기술을 이끌어가는 연구자가 되고자 하는 목표를 가지고 있습니다. 해외 포닥 연수 동안 배우고 얻은 많은 노하우와 경험들을 토대로 국내 학계에서도 창의적이고 도전적인 연구를 진행하여 세계 최고 수준의 연구 성과를 도출하려고 노력할 것입니다. 또한 해외 포닥 연수 동안의 글로벌 인적 네트워크를 기반으로 우수한 연구진들과의 공동 협력 연구를 수행할 계획을 가지고 있습니다. ◈ 현지 연구 환경 미국 노스웨스턴 대학교 John A. Rogers 교수 그룹의 연구 환경은 세계 최정상이라고 생각합니다. 바이오 의료 전자기기 개발 연구에 필요한 재료 및 장비들을 제한 없이 사용할 수 있습니다. 수준 높은 의과대학과 병원들과의 협업을 통해 임상시험 및 동물실험을 진행하여 세계 최고 수준의 연구 성과를 도출하고 있으며, 연구단계의 기술뿐만 아니라 실생활 및 산업에 적용할 수 있는 수준의 기술을 개발하고 있습니다. 재료 공학뿐만 아니라 전자공학, 기계공학, 화학공학, 바이오공학, 의학 등 다양한 전공의 세계 최정상의 연구진들과 함께 공동연구를 진행함으로써 융합 연구의 시너지 효과를 얻을 수 있습니다. 또한 글로벌 인적 네트워크도 잘 구성되어 있습니다. 미국 노스웨스턴 대학교는 미국 중부에 위치하고 있습니다. 아름다운 미시간 호수를 끼고 있는 에반스턴과 시카고에 메인캠퍼스를 두고 있습니다. 에반스턴은 조용하고 여유로우며 치안에 안전하고 미시간 호수 및 비치들이 가까운 거리에 있어 매우 아름다운 경치를 자랑합니다. 에반스턴의 랜드마크로는 바하이 사원이 있습니다. 에반스턴의 날씨는 여름에는 시원하고 겨울에는 눈이 많이 내리며 매우 춥습니다. 하늘이 매우 깨끗해 일출과 일몰 때 아름다운 하늘을 볼 수 있습니다. ▲ 일출과 일몰이 예쁘고 아름다운 미시간 호수가 있는 에반스턴 캠퍼스 에반스턴에서 시카고는 차로 30분 정도 소요되며, 노스웨스턴 대학교 셔틀버스를 타고 쉽게 갈 수 있습니다. 시카고는 미국에서도 큰 대도시 중 하나이며, 인상적인 건축물, 박물관, 아쿠아리움, 맥주 브루어리 등으로 잘 알려진 도시입니다. 미시간 호수와 시카고 강이 도심에 있어 매우 아름다운 경관을 자랑하고, 보트 시티투어를 통해 이색적인 뷰를 관람할 수 있습니다. 시카고의 대표적인 관광지인 네이비 피어에서는 매년 여름에 큰 불꽃놀이가 열려 낭만적인 여름밤을 즐길 수 있습니다. John A. Rogers 연구그룹은 에반스턴 캠퍼스와 시카고 캠퍼스에 모두 연구실이 있습니다. 메인 연구는 에반스턴 랩에서 진행하고 있고, 시카고에는 의과대학과 병원이 위치하고 있어 임상시험 및 동물실험을 시카고에서 진행합니다. 미국 노스웨스턴 대학교는 연구 환경적으로나 도시 환경적으로나 최고의 환경이라고 생각합니다. 제 인생에서 가장 많은 변화를 경험하며, 많은 것을 배우고 크게 성장하는 시기라고 생각하며 항상 감사하는 마음으로 하루하루 최선을 다하여 지내고 있습니다. 감사합니다. ▲ 인상적인 건축물과 미시간 호수, 시카고 강이 도심에 흐르는 시카고. 이곳에 시카고 캠퍼스가 있다. [사진 출처] 2. 연구실사진, 4. 신생아를 위한 연구: https://magazine.northwestern.edu/features/stretching-the-imagination/; 3. 연구실사진: https://www.youtube.com/watch?v=Xca4EYSzGWM; 나머지 사진 : 김지혜 본인 촬영
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- 작성일 2022-01-26
- 조회수 6188
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- [Research] Prof. Sang-Woo Kim’s research team develops, inertia-driven in vivo energy harvesters
- Prof. Sang-Woo Kim’s research team develops, inertia-driven in vivo energy harvesters - Development of self-rechargeable cardiac pacemaker system based on body motion and gravity - Energy generation of 40 μW, similar to the power consumption of a pacemaker per step. - Expected to be used as a power source in various implantable medical devices in near future [Figure 1] Prof. Sang-Woo Kim, Dr. Hanjun Ryu Prof. Sang-Woo Kim (Corresponding author) and Dr. Hanjun Ryu (first author) developed an energy harvesting device similar to the size of a coin-type battery that converts mechanical energy generated by human body motion into electricity using the triboelectric nanogenerator in collaboration with Energy-Mining LTD.’s CEO Hyun-moon Park (co-first author) and Prof. Eue-Keun Choi (co-author) of Seoul National University Hospital. The development provides a breakthrough to solving the power source problem of implantable medical devices by suggesting self-rechargeable cardiac pacemaker systems inside the body using human body movement. [Figure 2] Body-implantable bioelectronics devices have faced major technological challenges as they require re-surgery to replace the implantable medical devices periodically due to limited battery life problems, posing financial burden and the health risks to patients. Specifically, owing to the worldwide increasing number of patients and reoperation cases for implantable cardiac pacemakers, research has been conducted to minimize the system's power consumption in order to extend the lifespan of the pacemakers. Although the research for minimizing the power consumption of the implantable medical devices has been conducted, there are major challenges due to its difficulty in reducing the power consumed by the system that requires equipping of extra functions. In addition, with the ongoing miniaturization of the implantable medical devices, the battery life of the devices is facing a major challenge in its extension. [Figure 3] The joint research team found clues in the fact that objects in the box move seamlessly due to inertia by external movement. Although it is placed in sealed environment, the system demonstrated successful electricity generation through inertia and gravity driven by body movement that drags the PFA/Cu/PFA (freestanding unit) downward to make contact with the bottom PVA-NH2 triboelectric layer. Based on I-TENG, the research team confirmed that energy produced can charge the battery. Fully encapsulated I-TENG was inserted at different part of a large animal and the research team confirmed various motion can generate electric energy through BLE-based wireless measurement system. Consequently, research team was able to reach the conclusion that the system can charge capacitors and batteries without harming human body. [Figure 4] Given the amount of energy generated by I-TENG, it is highly likely that the cardiac pacemaker 's life will be extended by more than 10%. Moreover, the output power may linearly increase by adding the number of integrated circuits. This experiment suggested a self-rechargeable cardiac pacemaker system and demonstrated its excellent operation. Professor Kim said, "This study is a triboelectrification-based in vivo energy harvesting technology that suggests the possibility of self-rechargeable implantable medical devices that eliminated charging difficulty of existing wireless power transfer technology as there are no electromagnetic waves and irritating heat generated." He added that "The findings realized the feasibility of in vivo recharge technology and I will work on improving power generation efficiency through follow-up study." [Figure 5] This work was supported by the Nano Material Technology Development Program (2020M3H4A1A03084600) and the Basic Science Research Program (2021R1A2C2010990) through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT. ※ Paper: Self-rechargeable cardiac pacemaker system with triboelectric nanogenerators ※ S.-W.K., H.R., and H.-M.P. conceived the idea. H.R., H.-M.P., H.S.M., T.Y.K., H.-J.Y., S.S.K., J.K., and B.K. fabricated, measured, and simulated the devices. M.-K.K. and E.-K.C. per-formed the in vivo experiments. S.-W.K., T.H.H., and E.-K.C. commented on the research outcomes. H.R., H.-M.P., E.-K.C., and S.-W.K. analyzed the data and wrote the manuscript. S.-W.K. supervised the overall conception and design of this project. All authors contributed to the discussion on the results and improved the manuscript.), [Figure 6] https://www.skku.edu/skku/campus/skk_comm/news.do?mode=view&articleNo=90943&article.offset=0&articleLimit=10&srSearchVal=%EA%B9%80%EC%83%81%EC%9A%B0
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- 작성일 2022-01-26
- 조회수 1520
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- [Research] Research team led by Prof. Joohoon Kang develops ternary logic transistor applying Heterojunction
- Research team led by Prof. Joohoon Kang develops ternary logic transistor applying Heterojunction - Next-generation semiconductor system technology that overcomes physical limitations of the traditional binary system [Image 1] Prof. Joohoon Kang Professor Joohoon Kang from AMSE and Prof. Jeong Ho Cho from Yonsei University developed the next-generation semiconductor system technology that enabled ternary logic. Research and development of high-performing semiconductors that rapidly process mass information is increasingly drawing attention owing to the growing demand for AI, autonomous driving, and IoT devices, which are at the center of the ongoing fourth industrial revolution. The binary logic system is currently facing mechanical limitations to improve integration per unit area; thereby, research on fabricating the multi-valued logic system has emerged as an alternative to achieve goals in order to enhance performance in processing information and power consumption. To address such challenges, the research team arranged stable "0", "1", and "2" states for ternary information processing by sequentially driving two types of semiconductors with different threshold voltages. Also, they demonstrated the flawless operation of various logical operations using the ternary system. Professor Kang stated, "I expect the technology to come into use in the semiconductor industry soon considering the system's excellent applicability in large-area at waferscale without major changes in the conventional semiconductor fabrication process." [Figure 2] Schematic and Working principle of multi-valued logic device With the result, researchers are embarking on discovering the ideal combination of semiconductor materials and are following up on a multi-valued logic study that surpasses the ternary logic. D.U.L. and S.B.J. contributed equally to this work. This work was supported by the National Research Foundation of Korea (NRF) grant, funded by the Korean Government (MSIT) (2020R1A4A2002806 and 2020R1C1C1009381) and the Creative Materials Discovery Program (2019M3D1A1078299) through the NRF of Korea funded by the Ministry of Science and ICT, Korea. This research was partially supported by the Yonsei University Research Fund of 2021. ※ Paper title : Multi-State Heterojunction Transistors Based on Field-Effect Tunneling-Transport Transitions ※ Source : https://onlinelibrary.wiley.com/doi/10.1002/adma.202101243 https://www.skku.edu/skku/campus/skk_comm/news.do?mode=view&articleNo=91055&article.offset=0&articleLimit=10
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- 작성일 2022-01-26
- 조회수 1375
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- [Research] Prof. Cho, Hyung Koun’s research team suggests Memory-Type NO2 sensing system using anisotropic Semiconductor materials
- Prof. Cho, Hyung Koun’s research team suggests Memory-Type NO2 sensing system using anisotropic Semiconductor materials [Figure 1] Prof. Cho, Ph.D candidate Young Been Kim (co-first author) and Sung Hyeon Jung Prof. Hyung Koun Cho’s research team (co-first author Ph.D candidate Young Been Kim and Sung Hyeon Jung) from the Department of Advanced Materials Science and Engineering developed a progressive memory-type gas sensing system that has not only an alert system for highly concentrated NO2, but also memory-type responses to detect the cumulative occurrence of irregular exposures of low gas concentrations, thereby leading to a wide range of detection in a single sensing device. Conventional toxic gas sensors’ primary function is to detect instantaneous gas emissions above fatal amounts. However, it is prevalent to be exposed to hazardous gas flow at concentrations lower than the lethal amount in practice, which is highly dangerous due to the cumulative effect. In order to produce signal according to irregular gas exposure, response and recovery processes should be occurring in the same environment whereas materials like typical n-type metal oxide semiconductors has difficulty acting so as it is operated through strong chemisorption. [Figure 2] Thus, the research team developed a novel system that enables both rapid alarm function at high concentration and memory-type gas sensing at low concentration based on designed antimony triselenide (Sb2Se3) nanoflakes. [Figure 3] Therefore, the research team developed a novel system that enables both rapid alarm function at high concentration and memory-type gas sensing at low concentration. Generally, low-dimensional material-based gas sensing can be operated at room temperature by Physisorption in the surface of van der Waals planes which means without any defect. On the other hand, the broken bonds of oxide-based sensing materials, i.e., dangling bonds, are driven by Chemisorption that reacts at high temperatures. Due to its anisotropic two-dimensional crystalline structure, the Sb2Se3 nanoflake structure exhibits anisotropy in which the formed surface consists of van der Waals crystal planes and dangling bond planes, enabling NO2 detection at both room temperature and high temperature. In particular, unlike existing materials, this Sb2Se3 gas sensor requires a very low-voltage (1V) at room temperature. It can be operated continuously without any processing due to its recovery characteristic based on designed antimony triselenide (Sb2Se3) nanoflakes. [Figure 4] According to the crystalline planes of conductive materials with Sb2Se3 nanoflake structure, the research team utilized physisorption and chemisorption devices to create a memory-type sensing system equipped with room temperature operation and recovery functions. [Figure 5] Prof. Cho stated, "I find the development of Sb2Se3 gas sensors very meaningful as it enabled real-time tracking of irregular and continuous toxic gas emission that can lead to a fatal situation when accumulated." This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2019R1A6A1A03033215). This work was also supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1A2C3011870). https://www.skku.edu/skku/campus/skk_comm/news.do?mode=view&articleNo=90719&article.offset=0&articleLimit=10&srSearchVal=%EC%A1%B0%ED%98%95%EA%B7%A0
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- 작성일 2022-01-26
- 조회수 1365
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- [Faculty] Prof. Sangwoo Kim wins the Prime Minister’s Award at Nano Korea 2021
- Prof. Sangwoo Kim, School of Advanced Materials Science & Engineering, wins the Prime Minister’s Award at Nano Korea 2021 Sangwoo Kim, a professor of Advanced Materials Science & Engineering, received the 2021 Prime Minister’s Award for developing new materials for triboelectric nanogenerator and applying energy harvesting technology to smart wearable devices, IoT sensors, and implantable medical devices. Prof. Sang-woo Kim’s research team developed energy harvesting technology driven by ultrasound that enables powering biomedical implants in safe and convenience manner for the first time. This study theoretically identified the mechanical deformation of triboelectric energy under the skin layer with ultrasound, and induces continues triboelectrification through harmless ultrasound. Additionally, Prof. Sangwoo Kim’s research team suggested the triboelectric energy harvesting technology driven by transcutaneous ultrasound for powering medical implants. The energy harvesting technology driven by ultrasound is expected to contribute significantly to the future development of implantable medical device by addressing the limitations of battery replacement in implantable medical devices. Original Article: https://www.etnews.com/20210707000115 https://www.skku.edu/eng/About/media/news.do?mode=view&articleNo=90727&article.offset=0&articleLimit=10
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- 작성일 2022-01-26
- 조회수 827
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- [Research] AMSE Research team led by Prof. Sang-Woo Kim develops air-transmitted pathogen disinfection system applying triboelectri
- AMSE Research team led by Prof. Sang-Woo Kim develops air-transmitted pathogen disinfection system applying triboelectricity - Research team developed self-powered microbial disinfection using nanowire-enhanced localized electric field - Rapid disinfection of 0.025 seconds without needing extra electricity became possible - The system is expected to be applied to future ventilation system and hazmat suits [Image 1] Prof. Sang-woo Kim, Ph.D. Candidate Young Jun Kim Professor Sang-woo Kim’s research team from department of Advanced Materials Science & Engineering (AMSE) developed self-powered air-transmitted pathogen disinfection system based on triboelectric nanogenerator and nanowire. The research team achieved rapid inactivation of indoor/outdoor pathogens using triboelectricity generated by ambient energy such as mechanical vibration. Air-transmitted pathogens like SARS, MERS, and swine flu have caused serious damages on our community and economy as a whole. COVID-19, which is currently ongoing global pandemics, is also bringing about numerous infections and deaths. Given the time required to develop the vaccine, society should take proactive action to deter the spread of the epidemic. However, traditional high-efficiency particulate air (HEPA) filtration not only has drawbacks such as pressure drop and low throughput, but also cannot inactivate pathogens as it simply captures particles physically. Precipitator as well has risks as it generates ozone and requires kV-level high voltages. The research team found clue in the nanowire and triboelectricity. By forming an electric field out of triboelectricity and maximizing it through nanowires, research team demonstrated that airborne pathogens can easily be inactivated through electroporation method. The research team exposed E. coli (bacteria), B. subtilis (bacteria), and MS2 (virus) to the system and demonstrated that airborne pathogens, ranging from nanometer-level viruses to micrometer-level bacteria, can be easily removed through triboelectricity. Furthermore, the research team confirmed superior performance of the disinfection system of more than 99.99% inactivation of MS2 virus which has nanometer-level size at a fast air flow rate of 2 m/s. The system inactivates pathogens in mere 0.025 s without needing extra electricity. Also, pressure drop (24 Pa) of more than 50 times lower than widely-used H13 air filter is one of its promising feature. “Self-powered pathogen inactivation technology using static electricity overcomes the limitation of physical capture of the conventional filter.” Prof. Sang-woo Kim stated, adding “It can be applied in indoor and outdoor air ventilation technology that maximizes the energy efficiency of the circulation system due to low pressure drop albeit high pathogen disinfection efficiency of the system. We also expect this to be applied to masks and hazardous materials suits through follow-up research.” This work was supported by Nano Material Technology Development Program (2020M3H4A1A03084600) through the National Research Foundation of Korea (NRF) funded by Ministry of Science and ICT and the GRRC program of Gyeonggi province (GRRC Sungkyunkwan 2017-B05). Z.-Y.H. acknowledges the support from the Korea Research Fellowship Program through the National Research Foundation of Korea (No. 2019H1D3A1A01102903). Z.-Y.H. also thanks the technical support from Dr. Rong Cheng from Renmin University of China and Dr. Jinling Xue from Helmholtz Zentrum München. This paper was published online in ‘Nature communications’ on June 17th. ※ Paper: Triboelectrification induced self-powered microbial disinfection using nanowire- enhanced localized electric field ※ Author contributions: Prof. Sang-Woo Kim (corresponding author, AMSE, SKKU), Ph.D. Candidate Young-Jun Kim (First author, Ph.D., SKKU), Dr. Zheng-Yang Huo (First author, research professor, SKKU), Researcher In-Yong Suh (Master’s program at SKKU), Researcher Dong-Min Lee (Ph.D. program at SKKU), Dr. Jeong Hwan Lee (Postdoctoral researcher at SKKU), Dr. Ye Du (Sichuan University), Researcher Si Wang (UESTC), Dr. Hong-Joon Yoon (Postdoctoral researcher at SKKU) https://www.skku.edu/skku/campus/skk_comm/news.do?mode=view&articleNo=90425&article.offset=20&articleLimit=10
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- 작성일 2022-01-26
- 조회수 1375