Institution
Hanyang University
Education•Seoul, South Korea•
About: Hanyang University is a education organization based out in Seoul, South Korea. It is known for research contribution in the topics: Thin film & Population. The organization has 29387 authors who have published 58815 publications receiving 1190144 citations. The organization is also known as: Hanyang Taehakkyo.
Topics: Thin film, Population, Oxide, Membrane, Catalysis
Papers published on a yearly basis
Papers
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Central Manchester University Hospitals NHS Foundation Trust1, University College London2, Queen Elizabeth II Health Sciences Centre3, University of Pennsylvania4, Toronto Western Hospital5, Hanyang University6, University of Birmingham7, University of California, Los Angeles8, University of Calgary9, McGill University Health Centre10, SUNY Downstate Medical Center11, Oklahoma Medical Research Foundation12, University of Alabama at Birmingham13, Laval University14, Johns Hopkins University School of Medicine15, University of North Carolina at Chapel Hill16, King's College London17, Northwestern University18, Hairmyres Hospital19, The Feinstein Institute for Medical Research20, Karolinska Institutet21, University of California, San Diego22, University of the Basque Country23, Emory University24, Medical University of South Carolina25, University of Manitoba26, Istanbul University27
TL;DR: It is found that several potentially modifiable risk factors for damage accrual are identified and an integrated strategy to address these may improve long-term outcomes.
Abstract: We studied damage accrual and factors determining development and progression of damage in an international cohort of systemic lupus erythematosus (SLE) patients.
379 citations
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TL;DR: In this article, the effectiveness of supplementary cementitious materials (SCMs) such as ground granulated blast-furnace slag (GGBS), fly ash (FA), and silica fume (SF) in reducing CO2 emissions from ordinary Portland cement (OPC) concrete was examined by assembling and analyzing a comprehensive database including 5294 laboratory concrete mixes and 3915 plant mixes.
376 citations
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TL;DR: An optic-neural synaptic device is demonstrating a close to linear weight update trajectory while providing a large number of stable conduction states with less than 1% variation per state and facilitates the demonstration of accurate and energy efficient colored and color-mixed pattern recognition.
Abstract: The priority of synaptic device researches has been given to prove the device potential for the emulation of synaptic dynamics and not to functionalize further synaptic devices for more complex learning. Here, we demonstrate an optic-neural synaptic device by implementing synaptic and optical-sensing functions together on h-BN/WSe2 heterostructure. This device mimics the colored and color-mixed pattern recognition capabilities of the human vision system when arranged in an optic-neural network. Our synaptic device demonstrates a close to linear weight update trajectory while providing a large number of stable conduction states with less than 1% variation per state. The device operates with low voltage spikes of 0.3 V and consumes only 66 fJ per spike. This consequently facilitates the demonstration of accurate and energy efficient colored and color-mixed pattern recognition. The work will be an important step toward neural networks that comprise neural sensing and training functions for more complex pattern recognition. Artificial neural networks can emulate the human vision because of their spike-based operation by employing memristors as synapses. Here, Seo et al. integrate synaptic and optical sensing functions in a single heterostructure, which enables accurate and energy-efficient recognition of colored patterns.
376 citations
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TL;DR: It is found that a combination of high stretchability and high electrical conductivity can be obtained for composites prepared from three-dimensional CNT structures, such as CNT forests (vertically aligned arrays of CNTs).
Abstract: Electrically conductive materials capable of substantial elastic stretch and bending are needed for such applications as smart clothing, flexible displays, stretchable circuits, strain gauges, implantable devices, high-stroke microelectromechanical systems, and dielectric elastomer actuators. A variety of approaches involving carbon nanotubes (CNTs) and elastic polymers have been suggested for the fabrication of conductive elastic composites. In particular, diverse active and passive electronic components have been embedded in rubber sheet by several research groups to obtain stretchable electronic devices. Sekitani et al. developed rubber-like conductive composites by mixing millimeter-long single-walled carbon nanotubes (SWNTs), an ionic liquid, and a fluorinated copolymer. The stretchability of the resulting composite was enhanced by creating perforated films with a net-shaped structure using a mechanical punching system. Cao et al. fabricated flexible electrodes by incorporating SWNTnetworks in plastics consisting of polyimide, polyurethane, and polyamic acid films. Although quite successful, these studies indicated that high loading of CNTs (or other conductive additive) was necessary to obtain a highly conducting composite. On the other hand, incorporation of high concentrations of CNTs into an elastic polymer increases the stiffness of the resulting composite and decreases its stretchability. In other words, the significant difference in the Young’s modulus of extremely rigid CNTs and the elastic polymer filler makes the creation of a highly stretchable conductive composites a challenging task. It is known that CNTs can be fabricated into macroscopic assemblies, such as mats (bucky paper), yarns, and fibers that possess useful electrical properties, and that these assemblies can be used for the fabrication of conductive polymer composites. While these assemblies are often more elastic than the individual CNTs, the achievable elastic strain range is still quite limited, normally less than 10%. We found that a combination of high stretchability and high electrical conductivity can be obtained for composites prepared from three-dimensional CNT structures, such as CNT forests (vertically aligned arrays of CNTs). Unlike previous methods involving casting CNT/ polymer dispersions as a film, our composites were prepared by the direct infiltration of multiwalled carbon nanotube (MWNT) forests with a polyurethane (PU) solution. Using this procedure, we obtained rubber-like forest/PU composites that combined high stretchability with high electrical conductivity. These composites provide highly reversible stress–strain behavior and little degradation of mechanical and electrical properties even when stretched over a wide strain range. The developed preparation procedure appears scalable for material fabrication on an industrial scale, though transition from present batchbased forest growth processes to continuous forest growth processes would be needed for applications that are price sensitive and depend on sheet weight, rather than the area of elastomeric sheet. The aligned arrays of MWNTs (MWNT forests) used in this study were grown on iron-catalyst-coated silicon wafers using a conventional chemical vapor deposition (CVD) method. Nanotubes in the forests typically had a diameter of about 10 nm; their length could be controlled across a wide range by changing the growth time and other fabrication conditions. The forest-covered area on the substrate used for the preparation of the composites typically had dimensions of about 50 100mm; the height of nanotubes in the forest was about 50mm as determined by the conventional optical microscopy. Since the nanotubes in the forests formed a three-dimensionally interconnected network, the forests were electrically conductive in all directions. The MWNT forests were infiltrated with a PU solution in N,N-dimethylformamide (DMF) using a simple drop-casting procedure, as shown in Figure 1a. The PU used was poly[4,40methylene-bis(phenyl isocyanate)-alt-1,4-butanediol/poly(butylene adipate)]. After evaporation of the solvent, we obtained about 250mm thick forest/PU composite sheets that could be peeled off the underlying Si wafer. Figure 1b shows a photograph of the MWNT/PU composite sheet taken at low magnification. One side of the prepared film facing the substrate (forest side) was black and conductive, and the other side (PU side) was white and insulating. The material was soft, flexible, and highly stretchable in the sheet plane. Figure 1c shows a SEM image of a cross-section of the composite sheet with the top ( 50mm in thickness) being the forest side and the bottom ( 200mm in thickness) being the PU side. A highmagnification image of the forest side is shown in the
375 citations
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TL;DR: In this paper, a facile carbon-coating coupled with a thermal-reduction strategy has been developed to synthesize unique Sb@C coaxial nanotubes, which exhibit excellent sodium storage properties.
Abstract: Antimony (Sb) is an attractive anode material for sodium-ion batteries (SIBs) with a high theoretical capacity of 660 mAh g−1. However, its practical application is greatly hindered by the rapid capacity fading which is largely due to the large volume expansion during sodiation. Tuning the morphology and structure at the nanoscale or using carbonaceous materials as the buffer layer is essential to address this issue. Here, a facile carbon-coating coupled with a thermal-reduction strategy has been developed to synthesize unique Sb@C coaxial nanotubes. With different annealing time, the hollow space and the amount of Sb inside the tube can be easily tuned by the partial evaporation of Sb. The as-obtained Sb@C nanotubes exhibit excellent sodium storage properties. The remarkable electrochemical performance results from the unique coaxial nanoarchitecture. Specifically, it delivers a high specific capacity of 407 mAh g−1 at 100 mA g−1 after 240 cycles. Furthermore, a stable capacity of 240 mAh g−1 can be retained at 1.0 A g−1 even after 2000 cycles. Most importantly, high capacities of 350 mAh g−1 and 310 mAh g−1 can be achieved at large current densities of 10 and 20 A g−1, respectively, which represents the best rate performance among the reported Sb-based anode materials.
375 citations
Authors
Showing all 29583 results
Name | H-index | Papers | Citations |
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John A. Rogers | 177 | 1341 | 127390 |
Charles M. Lieber | 165 | 521 | 132811 |
Jongmin Lee | 150 | 2257 | 134772 |
Rajesh Kumar | 149 | 4439 | 140830 |
Prashant V. Kamat | 140 | 725 | 79259 |
Tae Jeong Kim | 132 | 1420 | 93959 |
Jie Liu | 131 | 1531 | 68891 |
Junghwan Goh | 128 | 1068 | 77137 |
Young Hee Lee | 122 | 1168 | 61107 |
Allan H. MacDonald | 119 | 926 | 56221 |
Terence G. Langdon | 117 | 1158 | 61603 |
Yang-Kook Sun | 117 | 781 | 58912 |
Sang Yup Lee | 117 | 1005 | 53257 |
Yoshinobu Unno | 115 | 875 | 66107 |
Xi Chen | 105 | 1547 | 52533 |