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Research on tripling the performance of organic photodetectors published in a Nature sister journal- prof. Park Song-Yi from PKNU investigated characteristics of organic semiconductors for high-performance organic photodetectors△ Image related to professor Park Song-Yi's research. Schematic of the organic semiconductor molecular structure, the organic photodetector device structure, and the photoelectric conversion process used in the research (top), simulation results of energy level separation in Cl6-SubPc thin films (bottom left), and photodetection capability results based on Cl6-SubPc thickness (bottom right). New research results have shown that the performance of organic photodetectors, which are emerging as next-generation image sensors, can be improved by more than three times compared to existing technologies, attracting significant attention. Professor Park Song-Yi from the department of physics at Korea Pukyong National University recently published research findings in the international journal
Prof. Im Do-Jin's research team at PKNU published as the cover paper of an international academic journal- published in the international academic journal ... research on the development of innovative droplet dispensing by suction technique The paper by the research team of professor Im Do-Jin (department of chemical engineering) at Pukyong National University was published as the cover paper of the international academic journal (IF 13.3). is a renowned international academic journal in the field of nanotechnology published by John Wiley & Sons (Wiley). The title of their paper featured on the cover is 'Simultaneous separating, splitting, collecting, and dispensing by droplet pinch-off for droplet cell culture'. Professor Im Do-Jin's research team developed a novel droplet dispensing technology for the automated cultivation of organoids, which are next-generation artificial organ models, and presented this technology in the paper. Organoids are artificially created organ models using stem cells, and are gaining attention in basic research for new drug development because they can closely mimic real organs. However, there is a significant drawback in that the entire process of inducing stem cell differentiation to form and maintain organoids is extremely cumbersome. It is very challenging to efficiently replace most of the culture medium, and there is a risk of cell damage during this process. To solve this problem, the research team used a new concept of liquid droplet (very small, round water droplet) dispensing technology that uses suction. As a result, more than 99% of the culture medium in the 3D cell culture droplet was efficiently replaced and recovered without damaging the cells. Bae Seo-Jun, a phd. candidate and the first author of the paper, systematically analyzed over 2,000 experimental videos and discovered that the flow rate of suctioning droplets significantly affects the size of the dispensed droplets. He mentioned, "I expect that the droplet dispensing technology, which enables the simultaneous distribution, splitting, and recovery of droplets, will be useful in developing automated platforms for organoid cultivation." Professor Im Do-Jin's research team conducted this research with the support of the mid-career researcher Program from the National research foundation of Korea.
Prof. Seo Jin-Ho's team at PKNU received the best paper award for their research on 'snake robot' control- presented at the Korea robotics society annual conference, increased the usability of snake robots△ The concept image for head control of a snake robot. The research team led by Professor Seo Jin-Ho (mechanical systems engineering) at Pukyong National University announced that the team won the best paper award at the 19th Korea robotics society annual conference (KRoC2024). Professor Seo Jin-Ho's team received an excellent evaluation in the poster category for their paper 'research on I-PID-based snake robot head control using RBF neural network and robust control' at this academic conference held at Phoenix Pyeongchang from the 21st to the 24th of last month. The Korea robotics annual society conference is Korea's largest robot-related academic conference jointly held by the Korea robotics society and the Korea robot industry promotion institute to share various engineering knowledge in the robotics field and expand the academic field related to robots. In this study, the research team presented an effective head control method for a snake robot used for purposes such as exploring narrow spaces using RBF neural network, an artificial intelligence technique, and robust control, which is one of the theories for controlling uncertainty in the system. The research team suggested a strategy to independently control the joints of the snake robot's head and revealed a method to minimize camera shake that occurs while driving the snake robot through robust control combined with an artificial neural network. Professor See Jin-Ho said, "I expect that our team's research will be used as basic research to increase the usability of snake-shaped robots as mobile robots."
대외협력과 (2024-06-14)조회수 24158Prof. Cho Kie-Yong's team at PKNU developed a high-performance composite membrane based on MOF- the results of joint research with the Korea institute of energy research published in an international academic journal△ The synthesis of defective MOFs and the impact of defects on the membrane and membrane performance. The research team led by professor Cho Kie-Yong (industrial chemical) at Pukyong National University succeeded in developing a high-performance composite membrane by intentionally inducing defects in UiO-66 nanoparticles, one of the metal organic frameworks (MOFs), and analyzing the impact of these defects on the manufacturing and performance of the composite membrane. Professor Cho Kie-Yong achieved results in this research through joint research with professor Kwon Hyuk-Taek chemical engineering), professor Son Min-Young and the research team led by doctor Yeo Jeong-Gu at the Korea institute of energy research. Metal-organic framework materials are porous, crystalline particles made by synthesizing metals and organic materials, allowing for various combinations, and due to its unique characteristics, such as high specific surface area, uniform pore size, and high adjustability, research is currently being actively conducted to utilize it in various fields such as catalysts, gas separation, and storage. However, because this material has low compatibility with polymer materials, it has the disadvantage of significantly reducing membrane stability and separation performance due to particle agglomeration. In addition, when manufacturing a thin composite film with this material, the shape stability was lowered depending on the separation driving conditions, so it was difficult to manufacture it in thin film form. To overcome this limitation, the research team developed a synthesis method that intentionally induces defects in UiO-66 particles by controlling the concentration of reactants such as reaction modulators and developed reaction conditions favorable for high-capacity synthesis while controlling the interfacial properties of particles in an easy and simple way, and developed a composite membrane that shows stable driving performance even in thin film-type separators. This defect induced in UiO-66 particles strengthened the interaction with the polymer, minimizing dispersibility problems, and increased the interaction with water, the separation target, significantly improving separation performance. The thin-film composite membrane manufactured by the research team using strong interactions caused by defects showed significantly higher separation performance, with the pervaporation index (PSI) improved by approximately 1,664% (16 times) compared to existing polymer membranes. Research member Choi Kyeong-Min, the first author of this research paper, said, "If defects in metal-organic framework materials can be intentionally adjusted or controlled, I expect that related industries will become larger and diverse by applying this material, which is used in various fields. We plan to conduct more active research on the development, utilization, and commercialization of new materials in the future." This research was supported by the National research foundation of Korea with the young researcher program, and the research paper 'Thin selective layered mixed matrix membranes (MMMs) with defective UiO-66 induced interface engineering toward highly enhanced pervaporation performance' was published in
Prof. Cho Kie-Yong's team at PKNU proposed a separator for next-generation Li-S secondary batteries- paper in the international academic journal
PKNU and PNU joint research team have developed a high-performance silicon cathode battery- prof. Cho Kie-Yong and others applied the development of a cross-linked copolymer binder based on fluorine-based polymers- paper in the international academic journal
A research team led by pro. Cho Kie-Yong at PKNU has developed technology to increase the lifespan and safety of lithium metal batteries- developed ultra-thin silica (SiO2) nanoparticle coating technology for battery separators- published in the international academic journal
PKNU prof. Cho Kie-Yong's team developed a separator that suppresses thermal runaway in secondary batteries- giving new self-extinguishing capabilities by coating separator of a lithium-ion battery with a fluorine-based polymer- published in the international academic journal
Adolescents who smoke and drink alcohol are more likely to use drugs- research results from the research team of professor Her Won-Bin and Oh Young-Sam at PKNU Reserch has shown that adolescents who have experienced smoking and alcohol are more likely to use drugs than those who have not. The team of professors Her Won-Bin and Oh Young-Sam in the department of social welfare at Pukyong National University, found out the correlation between adolescents' smoking, drinking, and drug use based on the gateway theory. The gateway theory is often used to explain the phenomenon where the use of safe or legally permitted drugs leads to the use of stronger (more addictive) drugs. It is in a similar context to the proverb, 'he that will steal an egg will steal an ox'. According to their study, the group with experience using narcotics had more experience with smoking and drinking at a statistically significant level than the group with no experience. Lifetime experience of using e-cigarette (incl. vape pen) was twice as high, lifetime experience of smoking was approximately 1.54 times higher, and lifetime experience of drinking alcohol was approximately 1.29 times higher. The results of the study showed that adolescents who had ever smoked e-cigarettes at least once in their lives were 2.42 times more likely to use narcotics than adolescents who had no experience at all. Additionally, the earlier (younger) one started smoking cigarettes during adolescence, the likelihood of using narcotics increased by 1.53 times each year, and the earlier one year of starting drinking, the likelihood of using narcotics increased by 1.58 times. The research team conducted the study using the results of the 17th (2021) online survey on adolescent health behavior conducted by the Korea disease control and prevention agency (KDCA) on 54,848 middle and high school students from 800 schools nationwide and analyzed the results of this study as supporting the gateway theory that the use of soft drugs such as smoking and drinking leads to the use of hard drugs such as narcotics. The paper 'Analyzing the relationship among adolescent alcohol, smoking, and drug use: utilizing the gateway theory’ containing this study was published in the latest issue (vol. 31, no. 2) of
PKNU research team presents a plan to improve electrolyte performance of all-solid-state batteries- research results of prof. Jung Sung-Chul's team published in the international journal of the Royal society of chemistry- the disorder of anions increases the stability of the solid electrolyte Pukyong National University (President Jang Young-Soo) announced that a research team led by professor Jung Sung-Chul (department of physics) proposed a method to improve the performance of Li6PS5Cl, a sulfide-based solid electrolyte used in solid-state batteries. In an ab initio calculation study conducted by professor Jung Sung-Chul with phd student Jeon Tae-Gon and master's researcher Cha Kyeong-Ho in the same department, he succeeded in quantitatively identifying the effect of the disordered arrangement of S and Cl anions in Li6PS5Cl, a solid electrolyte, on the physical properties of Li6PS5Cl. All-solid-state batteries are receiving a lot of attention because they can greatly increase the stability and energy density of the battery by replacing the flammable liquid electrolyte with a non-flammable solid electrolyte. Li6PS5Cl, based on the argyrodite structure, has excellent ionic conductivity, and its raw materials, Li2S, LiCl, and P2S5, are economical and easy to synthesize, so many studies are being pursued. In this study, professor Jung's team found that Li6PS5Cl is highly stabilized when disorder occurs compared to when there is no anion disorder, and the stabilized Li6PS5Cl shows high ionic conductivity (up to 4.6 mS cm 1). Additionally, the research team found that when anion disorder occurs, some of the Li ions move from around Cl to close to S, and that this rearrangement of Li contributes decisively to improving the stability and increasing conductivity of Li6PS5Cl. Professor Jung Sung-Chul said, "I believe that this study suggests that precisely controlling the ionic disorder of the solid electrolyte is another way to improve the electrochemical performance of not only Li6PS5Cl but also other solid electrolytes." The study was conducted through support from the mid-career researcher program supported by the Ministry of science and ICT and the LAMP project hosted by the Ministry of education, and recently published in
PKNU developed 'dual nanopatterning process' for the first time- joint research with Busan national univ., Korea university, POSTECH, and KICET△ Researchers at Pukyong National University. From the left, professor Park Woon-Ik, Dr. Park Tae-Wan, master candidate Kang Young-Lim, and Kang Eun-Bin in integrated bachelor and master's program. Pukyong National University announced that professor Park Woon-Ik's (materials science and engineering major) research team was the first to develop an advanced concept and technology of dual nanopatterning process that forms a 20-nano ultra-fine pattern on an 8-inch wafer in the semiconductor process. With the development of next-generation electronic devices, the development of nanopatterning processes to implement highly integrated semiconductor circuits is essential to produce various electronic devices. Photolithography is mainly used as the current representative nanopatterning process, but researchers have been developing new processes to replace it due to limitations in pattern resolution, expensive equipment, and complicated process steps. 'Nanotransfer printing', which exhibits high pattern resolution at a low cost, is considered one of the new alternative processes, but this has also been pointed out as a disadvantage in that the pattern resolution is largely dependent on the pattern size of the master mold. To solve this problem, the research team applied a method that combined the self-assembly phenomenon of block copolymers containing silicon (Si) with the nanotransfer printing process and finally they succeeded in developing a dual nanopatterning process to form regularly aligned 20-nanometer silica (SiOx) structures on an 8-inch wafer. Professor Park Woon-Ik said, "I expect that the dual nanopatterning process will greatly contribute to the development of next-generation semiconductor technology in the future because it can implement highly integrated patterns with more complex circuits at a cost that is one-tenth of that of existing patterning technologies." This research was conducted through the basic research laboratory (BRL) and mid-career researcher program provided by the National research foundation of Korea (NRF) under the Ministry of science and ICT (MSIT), and the paper containing the research results, 'direct printing of ultrathin block copolymer film with nano-in-micro pattern structures' was published in the international academic journal
Joint research team of prof. Lee Seung-Hun from PKNU developed achromatic copper with preserving oxidation resistance- joint research between PKNU, Busan national univ., Sungkyunkwan univ., and Mississippi state college△ Representative images of the research (a) color control of porous nanostructured copper thin films, (b) Figure 3d shows achromatic copper and transmission electron microscopy of its nanostructured surface, (c) Wetting properties change process according to porosity of colorless copper A joint research team with professor Lee Seung-Hun (dept. of physics) from Pukyong National University (President Jang Young-Soo) developed single-crystal copper that does not rust and can achieve continuous achromatic colors from gray to black. The joint research team, which included researchers from Pukyong National University, Busan national university, Sungkyunkwan university, and Mississippi state college, identified the growth mechanism of colorless copper, the cause of oxidation resistance, and the specificity of the grown copper surface through theory and experiment. The paper 'self-oxidation resistance of the curved surface of achromatic copper' containing the results of this research was introduced in the world-renowned academic journal
Teen-smokers should try to quit smoking at least once, even if they fail- research result from prof. Her Won-Bin, and prof. Oh Young-Sam's team at PKNU draws attention from the academia△ Prof. Her Won-Bin, prof. Oh Young-Sam and prof. Jeong Hye-JinAmong the teen-smokers, those who try to quit smoking at least once had a significantly lower levels of addiction to nicotine than the group who do not try. This is the result of a study conducted by a joint research team led by professors Her Won-Bin and Oh Young-Sam from the department of social welfare at Pukyong National University and professor Jeong Hye-Jin from the department of public administration at Busan National University through a survey of 349 teen-smokers under the age of 18 who had smoking experience. The research team utilized an empirical study targeting Korean teenagers based on the research results (2019) of the health and tobacco control division of California, USA that smokers who did not try to quit smoking before the age of 26 are likely to remain smokers for life. As a result of collecting sample data in the form of a questionnaire survey, the average age of the respondents was about 16 years old, and the average duration of smoking was 2.6 years. The research team analyzed them by dividing them into a group that had tried to quit smoking and a group that had not tried. As a result of their study, 69% of the non-trial group who had never tried to quit smoking were male adolescents, which was significantly higher than the attempt group. Teens who did not go to school were more likely to be in the group who had tried to quit smoking at least once. The research team speculated that the reason for the large number of out-of-school youth in the trial group was economic factors or the effect of the youth center's anti-smoking program. The research team suggested, "Research results show that nicotine addiction increases if you do not try to quit smoking even once," and added, "For teenagers to be successful in quitting smoking in the long term, even if they fail, they should try to quit smoking as soon as possible, practice quitting and build up the stamina to quit." They said, "We expect that the results of this study will help design and develop smoking cessation programs that consider smoking-related factors and characteristics of each group." The paper 「Examining Predictors of Nicotine Dependence in Korean Adolescents: comparing ever quitters and never quitters」 containing the results of this study was introduced in an international journal,
Korean researchers have solved the problem of 'preservation of the parathyroid glands', the biggest challenge in thyroid surgery- a joint research by PKNU, Kosin Univ. & UNIST... obtained MFDS approval and a US, China patent△ professor Ahn Ye-Chan.Researchers in Korea have succeeded in resolving one of the biggest challenges in thyroid surgery, the preservation of the parathyroid glands. Pukyong National University (President Jang Young-Soo) announced that a research team led by professor Ahn Ye-Chan from the department of biomedical engineering developed a technology to preserve the parathyroid gland during thyroid surgery and completed FMDS approval as well as international patent registration. Thyroid cancer, which is the most common cancer in Korea, has a high survival rate, but patients who have undergone thyroid surgery often experience symptoms such as numbness in the hands and feet, abnormal sensations around the mouth, chest tightness, or body convulsions in the hands or face. These symptoms are the most common and serious complication of thyroid surgery and are caused by hypofunction of the parathyroid gland. Since the size of the parathyroid gland is very small, it is difficult to distinguish it with the naked eye from the surrounding adipose tissue and even if the parathyroid gland is found, preserving blood flow to this tiny organ is not easy even for experienced surgeons, so it has been considered the biggest challenge in thyroid surgery. To solve this problem, professor Ahn Ye-Chan at Pukyong National University developed a 'technology to detect invisible parathyroid glands using near-infrared autofluorescence imaging to preserve parathyroid glands during thyroid surgery' in collaboration with professor Lee Kang-Dae from the department of otorhinolaryngology at Kosin University Gospel Hospital and professor Bae Seong-Cheol from the Department of Biomedical Engineering and Kim Yi-Geun at the Ulsan National Institute of Science and Technology (UNIST). Based on high sensitivity and low noise performance, near-infrared imaging equipment using this technology detects very weak parathyroid autofluorescence signals without turning off the lights. Since the surgeon can check the position of the parathyroid gland in real time during surgery, the organ can be preserved accordingly. From February to the 4th of this month, the research team obtained approval from the Ministry of Food and Drug Safety for the manufacture and sale of near-infrared imaging equipment using this technology while registering four patents on this source technology in succession in the US and one in China. Professor Ahn Ye-Chan at Pukyong National University, explained that, "by registering this technology as a patent in the US and China for solving one of the biggest challenges in thyroid surgery, we secured an opportunity to enter the global market. I expect that it will attract a lot of attention especially in the Chinese market where the number of thyroid surgeries is rapidly increasing."
대외협력과 (2023-09-01)조회수 792New technology development in 'photovoltaic & LED display in one'- joint research between PKNU and Korea institute of energy research published research paper in international academic journals and completed patent registrationA 'high-efficiency solar LED display module' has been developed that can utilize solar power generation during the day and LED display at night with a single module. Pukyong National University (President Jang Young-Soo) announced that a research team led by professor Shin Dong-Yoon (dept. of nanotechnology eng.) and the research team of senior researcher Kang Ki-Hwan from the photovoltaic research center at Korea institute of energy research developed a new solar display convergence technology through joint research. The joint research team succeeded in converging a solar module and an LED display module, while dramatically lowering the reduction in electricity production efficiency of the solar module by 3%. Unlike existing solar modules that only produce electricity, it is expected to be able to utilize not only electricity generation but also media playback functions when this developed module is installed on the outer wall of a building. Existing LED display modules excessively block sunlight reaching the solar module, reducing the solar module's electricity production efficiency by 23%, so there was a limit to the fusion of these two modules. In addition, since the lifetime of the LED display is shorter than that of the solar module, there has been a problem that even the solar module must be replaced when it malfunctions. The research team solved these problems by applying a lattice structure. By installing LEDs at the intersections of grids, solar light reaches the empty areas of the grids without interfering with the solar modules, developing detachable solar LED display modules. Especially when a lattice-type structure is applied, another problem arises in that electricity production efficiency decreases due to a lattice shadow when sunlight is incident on the module at an angle according to the altitude of the sun. In response, the research team solved this problem by installing a reflector on the wall of the lattice structure to reflect sunlight back to the solar module. As a result of the simulation after the research team installed this module in a building in Seoul, it was shown that the LED display module could be operated for up to 22 hours at night with the electricity produced during the day. Following the publication of the paper 'grid-type LED media facade with reflective walls for building-integrated photovoltaics with virtually no shading loss', which contains the results of this research, in the international journal
Autonomous soft robots using LCE developed by PKNU getting attention- prof. Kim Dae-Seok published a paper in international journal,