research
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KAIST Develops a Credit-Card-Thick Flexible Lithium Ion Battery
Since the battery can be charged wirelessly, useful applications are expected including medical patches and smart cards.
Professor Jang Wook Choi at KAIST’s Graduate School of Energy, Environment, Water, and Sustainability (EEWS) and Dr. Jae Yong Song at the Korea Research Institute of Standards and Science jointly led research to invent a flexible lithium ion battery that is thinner than a credit card and can be charged wirelessly.
Their research findings were published online in Nano Letters on March 6, 2015. Lithium ion batteries are widely used today in various electronics including mobile devices and electronic cars. Researchers said that their work could help accelerate the development of flexible and wearable electronics.
Conventional lithium ion batteries are manufactured based on a layering technology, stacking up anodes, separating films, and cathodes like a sandwich, which makes it difficult to reduce their thickness. In addition, friction arises between layers, making the batteries impossible to bend. The coating films of electrodes easily come off, which contributes to the batteries’ poor performance.
The research team abandoned the existing production technology. Instead, they removed the separating films, layered the cathodes and anodes collinearly on a plane, and created a partition between electrodes to eliminate potential problems, such as short circuits and voltage dips, commonly present in lithium ion batteries.
After more than five thousand consecutive flexing experiments, the research team confirmed the possibility of a more flexible electrode structure while maintaining the battery performance comparable to the level of current lithium ion batteries.
Flexible batteries can be applied to integrated smart cards, cosmetic and medical patches, and skin adhesive sensors that can control a computer with voice commands or gesture as seen in the movie “Iron Man.”
Moreover, the team has successfully developed wireless-charging technology using electromagnetic induction and solar batteries.
They are currently developing a mass production process to combine this planar battery technology and printing, to ultimately create a new paradigm to print semiconductors and batteries using 3D printers.
Professor Choi said, “This new technology will contribute to diversifying patch functions as it is applicable to power various adhesive medical patches.”
Picture 1: Medical patch (left) and flexible secondary battery (right)
Picture 2: Diagram of flexible battery
Picture 3: Smart card embedding flexible battery
2015.03.24 View 10690 -
System Approach Using Metabolite Structural Similarity Toward TOM Suggested
A Korean research team at KAIST suggests that a system approach using metabolite structural similarity helps to elucidate the mechanisms of action of traditional oriental medicine.
Traditional oriental medicine (TOM) has been practiced in Asian countries for centuries, and is gaining increasing popularity around the world. Despite its efficacy in various symptoms, TOM has been practiced without precise knowledge of its mechanisms of action. Use of TOM largely comes from empirical knowledge practiced over a long period of time. The fact that some of the compounds found in TOM have led to successful modern drugs such as artemisinin for malaria and taxol (Paclitaxel) for cancer has spurred modernization of TOM.
A research team led by Sang-Yup Lee at KAIST has focused on structural similarities between compounds in TOM and human metabolites to help explain TOM’s mechanisms of action. This systems approach using structural similarities assumes that compounds which are structurally similar to metabolites could affect relevant metabolic pathways and reactions by biosynthesizing structurally similar metabolites.
Structural similarity analysis has helped to identify mechanisms of action of TOM. This is described in a recent study entitled “A systems approach to traditional oriental medicine,” published online in Nature Biotechnology on March 6, 2015. In this study, the research team conducted structural comparisons of all the structurally known compounds in TOM and human metabolites on a large-scale. As a control, structures of all available approved drugs were also compared against human metabolites. This structural analysis provides two important results. First, the identification of metabolites structurally similar to TOM compounds helped to narrow down the candidate target pathways and reactions for the effects from TOM compounds. Second, it suggested that a greater fraction of all the structurally known TOM compounds appeared to be more similar to human metabolites than the approved drugs. This second finding indicates that TOM has a great potential to interact with diverse metabolic pathways with strong efficacy. This finding, in fact, shows that TOM compounds might be advantageous for the multitargeting required to cure complex diseases. “Once we have narrowed down candidate target pathways and reactions using this structural similarity approach, additional in silico tools will be necessary to characterize the mechanisms of action of many TOM compounds at a molecular level,” said Hyun Uk Kim, a research professor at KAIST.
TOM’s multicomponent, multitarget approach wherein multiple components show synergistic effects to treat symptoms is highly distinctive. The researchers investigated previously observed effects recorded since 2000 of a set of TOM compounds with known mechanisms of action. TOM compounds’ synergistic combinations largely consist of a major compound providing the intended efficacy to the target site and supporting compounds which maximize the efficacy of the major compound. In fact, such combination designs appear to mirror the Kun-Shin-Choa-Sa design principle of TOM.
That principle, Kun-Shin-Choa-Sa (君臣佐使 or Jun-Chen-Zuo-Shi in Chinese) literally means “king-minister-assistant-ambassador.” In ancient East Asian medicine, treating human diseases and taking good care of the human body are analogous to the politics of governing a nation. Just as good governance requires that a king be supported by ministers, assistants and/or ambassadors, treating diseases or good care of the body required the combined use of herbal medicines designed based on the concept of Kun-Shin-Choa-Sa. Here, the Kun (king or the major component) indicates the major medicine (or herb) conveying the major drug efficacy, and is supported by three different types of medicines: the Shin (minister or the complementary component) for enhancing and/or complementing the efficacy of the Kun, Choa (assistant or the neutralizing component) for reducing any side effects caused by the Kun and reducing the minor symptoms accompanying major symptom, and Sa (ambassador or the delivery/retaining component) which facilitated the delivery of the Kun to the target site, and retaining the Kun for prolonged availability in the cells.
The synergistic combinations of TOM compounds reported in the literature showed four different types of synergisms: complementary action (similar to Kun-Shin), neutralizing action (similar to Kun-Choa), facilitating action or pharmacokinetic potentiation (both similar to Kun-Choa or Kun-Sa). Additional structural analyses for these compounds with synergism show that they appeared to affect metabolism of amino acids, co-factors and vitamins as major targets.
Professor Sang Yup Lee remarks, “This study lays a foundation for the integration of traditional oriental medicine with modern drug discovery and development. The systems approach taken in this analysis will be used to elucidate mechanisms of action of unknown TOM compounds which will then be subjected to rigorous validation through clinical and in silico experiments.”
Sources: Kim, H.U. et al. “A systems approach to traditional oriental medicine.” Nature Biotechnology. 33: 264-268 (2015).
This work was supported by the Bio-Synergy Research Project (2012M3A9C4048759) of the Ministry of Science, ICT and Future Planning through the National Research Foundation. This work was also supported by the Novo Nordisk Foundation.
The picture below presents the structural similarity analysis of comparing compounds in traditional oriental medicine and those in all available approved drugs against the structures of human metabolites.
2015.03.09 View 9447 -
President Kang to Present at the World Economic Forum
President Sung-Mo Kang of KAIST will attend the World Economic Forum (WEF) as a member of the Global University Leaders Forum (GULF) to represent KAIST. GULF is attended by the world leaders of education and research. Its members represent 26 universities drawn from around the world including Harvard University. KAIST is the only Korean university to be invited.
WEF will be held in Davos, Switzerland, for four days, starting on 21 January 2015. He will discuss the future of higher education, the issues and solutions of science and society at GULF.
By attending GULF, KAIST expects to strengthen its network with top universities around the world and raise KAIST’s profile on an international basis. President Kang said, “The invitation for KAIST to attend the GULF is an evidence of its raised global status.” He continued, “I will show the innovative and challenging achievements KAIST has made to the leaders of the world.”
The theme of the 2015 World Economic Forum Annual Meeting 2015 is “The New Global Context” to discuss the integration of economic growth and society, employment and work force, environment and resource scarcity, the future of the Internet, and international crime and anti-corruption.
The World Economic Forum was established in 1971 by Klaus Schwab who is also its Executive Chairman. More than 2,500 people including German Chancellor Angela Merkel, French President François Hollande, Chinese Premier Li Keqiang, Google President Eric Schmidt, and Microsoft CEO Satya Nadella will attend this year's forum.
2015.01.22 View 8054 -
Distinguished Professor Sang Yup Lee Accepts an Honorary Professorship at Beijing University of Chemical Technology
Distinguished Professor Sang Yup Lee of the Department of Chemical and Biomolecular Engineering at KAIST has been appointed an honorary professor at Beijing University of Chemical Technology (BUCT). Founded in 1958, BUCT is one of the outstanding universities in mainland China, especially in chemistry studies.
In addition to the Chinese Academy of Sciences (2012), Shanghai Jiao Tong University (2013), Wuhan University (2014), and Hebei University of Technology (2014), this is the fifth honorary professorship Professor Lee has received from higher education institutions in China.
Professor Lee was recognized for his pioneering research in systems metabolic engineering of microorganisms necessary for the development of green chemical industries. He succeeded in producing succinic acid through bacterial fermentation and engineering plastic raw materials in the most effective and economical method for the first time in the world. Professor Lee also developed polylactic acid, a bio-based polymer that allows plastics to be produced through natural and renewable resources, as well as the microbial production of alkanes, an alternative to gasoline that can be produced from fatty acids.
Professor Lee has been actively working as a member of a group of global leaders supported by the World Economic Forum (WEF), serving as the Chairman of the Future of Chemicals, Advanced Materials & Biotechnology, Global Agenda Councils, WEF.
2014.11.13 View 10452 -
KAIST and Samsung Heavy Industries Celebrate 20 Years of Cooperation
KAIST and Samsung Heavy Industries (SHI) celebrated the twentieth anniversary of their university-industry cooperation in shipbuilding and ocean technology research. Established in 1995, the cooperation has remained steadfast for two decades, even times when Korea suffered gravely from its financial crisis in late 1990s.
A ceremony to commemorate the cooperation took place at the Mechanical Engineering Building on October 17, 2014. About thirty distinguished guests including the Head of the Department of Mechanical Engineering, Professor Choong-Sik Bae, and the chief engineer of SHI Marine Research Institute, Dr. Jong-Soo Seo, participated in the ceremony.
The cooperation programs included appointing advisory professors for technological support, implementing business-based academic courses, offering university-industry wide open lectures, opening regular courses for auditing, and finding possible joint researches. Through this cooperation, Samsung has secured technologies needed for industry, and KAIST has produced students who have real-world experience in industrial fields.
Twenty years of cooperation has produced shining results by running various programs such as technological advice, special lectures, small-scale research projects, consignment research projects, and courses for research and design personnel.
For example, what started as a small-scale research project with USD 4,800 in funding, the LNG (Liquefied Natural Gas) related research has grown into a large-scale research project with a total of USD 2.85 million in funding. As a result, they developed a secondary barrier for LNG carriers which was recognized by Lloyd‘s Register. Their research eventually lowered ship manufacturing costs tremendously.
In 2003, the cooperation project received the presidential citation from the University-Industry Cooperation Competition organized by the Federation of Korean Industries.
KAIST and SHI planned to increase their cooperation to make it Korea’s leading university-industry cooperation program.
Professor Bae said, “Our programs to focus on solving industrial problems have turned out quite successful.” He emphasized that “for this reason, the cooperation even continued during the Asian financial crisis in 1997.”
He added, “By expanding the current cooperation, we aim to make it an exemplary program that contributes to Korea’s shipbuilding and ocean plant industries.”
2014.10.21 View 9056 -
Distinguished Professor Sang Yup Lee Gives Special Lecture at Tianjin University, China
Distinguished Professor Sang Yup Lee from the Department of Chemical and Biomolecular Engineering at KAIST gave a special lecture at Tianjin University, China, on September 12, 2014.
The university has invited prestigious scholars and scientists including Nobel Prize laureates from all around the world to their program called the "BeiYang Lecture Series."
Professor Lee said:
"The lecture series has invited many eminent global leaders such as Dr. Steven Chu, who received the Nobel Prize in Physics in 1997 and also served the 12th United States Secretary of Energy. It is a great honor to participate in the program as a speaker. The university told me that in recognition of my research in the development of sustainable biochemical industry through systems metabolic engineering, I was invited to speak.”
Professor Lee presented his speech entitled “Production of Chemical Materials through Microorganism Metabolic Systems Engineering” and took questions from the audience.
Professor Lee developed the world’s most efficient microorganism and bioprocess such as succinate, butanol, and engineering plastic raw materials. In recent years, he has succeeded in producing a small quantity of gasoline through converting in-vivo generated fatty acids.
2014.09.16 View 8397 -
KAIST's Advanced Biomass R&D Center and ToolGen will cooperate
The Advanced Biomass R&D Center (ABC) at KAIST and ToolGen, Inc., a Korean biotechnology company focused on the development of engineered nucleases that can be used as essential tools for editing genetic information in microbial, plant, animal, and human cells, signed a memorandum of understanding (MOU) on August 18, 2014 for technology exchange and research collaboration.
ABC is headed by Executive Director Ji-Won Yang, a professor emeritus at the Department of Chemical and Biomolecular Engineering, and Chief Executive Officer Jong-Moon Kim for ToolGen.
The newly signed MOU encourages collaborations in the following areas:
- Development of genome editing technology for microalgae modification
- Development of microalgae that increases biofuel production through the
application of genome editing technology
- Creation of education and training programs for researchers
- Collaboration in other areas
In addition, the two organizations decided to cooperate in the improvement of biofuel yields using ToolGen’s genome editing technology, the commercialization of research outcomes, and the development of eco-friendly biofuels from biomass.
Executive Director Yang commented that “improving biofuel production is crucial to accelerate the commercialization of biofuels, and collaborating with ToolGen will help us realize that goal.” He further said that “The importance of this MOU lies in the fact that the global chemical industry including Korea has been making substantial efforts to shift its attention from a fossil fuel-based development to a more bio-based technology.”
Jin-Soo Kim, the director of the Genome Editing Research Center at the Institute of Basic Sciences in Korea and the cofounder of ToolGen, added that “ToolGen has successfully commercialized its third generation genetic scissors, which shows a lot of promise for commercialization. Our collaboration with KAIST will serve as the driving force to create new industries and accordingly, new jobs.”
2014.09.03 View 9709 -
EureCar, KAIST's Self-Driving Car, Made It to the Global Student Design Finalists at the 2014 National Instruments Annual Conference in Austin, Texas
The National Instruments Week 2014, an annual conference hosted by the National Instruments Corporation (NI), a global producer of automated test equipment and virtual instrumentation software, was held on August 4-7, 2014 at the Austin Convention Center in Texas. This international conference on graphical system design brought together more than 3,200 leading engineers and scientists across a spectrum of industries, from automotive to telecommunications, to robotics to energy.
On the third day of the keynote sessions at the conference, August 7, 2014, the winner of the Global Student Design Competition (GSDC) was announced.
EureCar, a self-driving car developed by Professor “David” Hyunchul Shim at the Department of Aerospace Engineering, KAIST, and his students, was one of the three finalists that were invited to the conference to contend for the Global Grand Prize.
The three finalists, each selected from a regional competition, were: EureCar from KAIST, Sepios, a nautical robot from Swiss Federal Institute of Technology in Zürich (ETH Zürich), and NASA Student Launch Project from the University of North Carolina at Charlotte. A total of 3,250 student research teams from 25 countries entered the 2014 GSDC, and the winner was ETH Zürich.
GSDC is designed to promote a better understanding and application by engineering students of NI’s system design software and hardware in their research and learning. Participating students utilized NI’s LabVIEW (software) and CompactRIO (hardware) to create their own solutions to engineering problems that encompass inexpensive medical devices to complex underwater autonomous vehicles.
For details about the finalists, please go to:
http://www.kaist.ac.kr/Upl/downfile/TS4159_Wahby_Student_Design_Showcase.pdf
2014.08.18 View 8595 -
Professor Haeng-Ki Lee appointed as "ICCES Distinguished Fellow"
Professor Haeng-Ki Lee
Professor Haeng-Ki Lee from the Department of Civil and Environmental Engineering at KAIST has been appointed as “Distinguished Fellow” and has also received the “Outstanding Research Award” at the International Conference on Computational & Experimental Engineering and Sciences (ICCES).
Founded in 1986, ICCES is regarded as one of the most prestigious international conferences in the field of computational mechanics and experimental engineering.
The Nominating Committee at ICCES recommends the appointment of a distinguished member who has made significant contributions to the development of computational mechanics and experimental engineering. Professor Lee was the first Korean who received such title. Furthermore, he was the recipient of the “Outstanding Research Award” presented by ICCES for his academic research on damage mechanics of complex systems.
Professor Lee is currently serving as the Head of the Department of Civil and Environmental Engineering at KAIST and the Director of BK Plus Agency, a Korean government’s research program. He received an award from the Minister of Science, ICT and Future Planning in 2013 for the promotion of science and technology.
2014.07.02 View 10257 -
Distinguished Professor Sang Yup Lee Attends World Economic Forum's Workshop
Sang Yup Lee, Distinguished Professor of Chemical and Biomolecular Engineering at KAIST was invited to attend the Technology Pioneer and Global Growth Company CEO Workshop hosted by the World Economic Forum (WEF) on June 19-20, 2014 in San Francisco. During the workshop, Professor Lee joined a discussion on “disruptive technologies” as a panelist.
Currently serving for the evaluation committee that selects technology pioneers for the workshop, during the discussion, Professor Lee identified important issues facing humanity, analyzed the issues through forecasting, and presented converging disruptive technologies that provide solutions to the problems. He also shared the “ten emerging technologies” announced by the Global Agenda Council on Emerging Technologies, WEF and the Korean government’s technology innovation strategies adopted to achieve its economic development policy called creative economy.
2014.06.22 View 7809 -
Professor Sang-Yup Lee Named the Winner of the Ho-Am Prize in 2014
The Ho-Am Prize, awarded by Samsung Group’s Ho-Am Foundation, was announced on April 2, 2014 in Seoul. Professor Sang-Yup Lee of Chemical and Biomolecular Engineering at KAIST was among the five recipients.
The prize is presented to Koreans who have made great contributions to the development of Korea in the field of science, engineering, medicine, arts, and philanthropy.
Professor Lee received the award in recognition of his pioneering research on systems metabolic engineering.
For the story written by Korea Joongang Daily, please go to the link below:
Ho-Am Foundation Names Annual Prize Winners
Korea Joongang Daily
April 3, 2014
http://koreajoongangdaily.joins.com/news/article/Article.aspx?aid=2987332
2014.04.03 View 9062 -
Extreme Tech: Nanowire "impossible to replicate" fingerprints could eliminate fraud, counterfeit goods
Research done by Professor Hyun-Joon Song of Chemistry at KAIST on
anti-counterfeit, nanoscale fingerprints generated by randomly distributed
nanowires was introduced by Extreme Tech, an online global science and technology
news.
For the articles, please go to:
Extreme Tech, March 25, 2014Nanowire ‘impossible to replicate’ fingerprints could eliminate fraud, counterfeit goods
http://www.extremetech.com/extreme/179131-nanowire-impossible-to-replicate-fingerprints-could-eliminate-fraud-counterfeit-goods
2014.03.26 View 7782