Institution
Pusan National University
Education•Busan, South Korea•
About: Pusan National University is a education organization based out in Busan, South Korea. It is known for research contribution in the topics: Population & Catalysis. The organization has 24124 authors who have published 45054 publications receiving 819356 citations. The organization is also known as: Busan National University & Pusan University.
Topics: Population, Catalysis, Thin film, Apoptosis, Microstructure
Papers published on a yearly basis
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TL;DR: In this paper, a chitosan-functionalized graphene oxides (FGOCs) were successfully synthesized and the presence of organic groups was confirmed by means of XPS and TGA.
Abstract: Chitosan-functionalized graphene oxides (FGOCs) were successfully synthesized. FGOCs were found to significantly improve the solubility of the GO in aqueous acidic media. The presence of organic groups was confirmed by means of XPS and TGA. Restoration of the sp2 carbon network and exfoliation of graphene sheets were confirmed by Raman spectroscopy, UV-visible spectroscopy and WAXD. The SEM and AFM investigations of the resultant FGOCs showed that most of the graphene sheets were individual and few were layered. Controlled release behavior of Ibuprofen and 5-fluorouracil was then investigated. We found that FGOCs are a promising new material for biological and medical applications.
327 citations
TL;DR: The fabrication and design principles for using transparent graphene interconnects in stretchable arrays of microscale inorganic light emitting diodes (LEDs) on rubber substrates are described and several appealing properties of graphene are demonstrated, including its ability to spontaneously conform to significant surface topography.
Abstract: This paper describes the fabrication and design principles for using transparent graphene interconnects in stretchable arrays of microscale inorganic light emitting diodes (LEDs) on rubber substrates. We demonstrate several appealing properties of graphene for this purpose, including its ability to spontaneously conform to significant surface topography, in a manner that yields effective contacts even to deep, recessed device regions. Mechanics modeling reveals the fundamental aspects of this process, as well as the use of the same layers of graphene for interconnects designed to accommodate strains of 100% or more, in a completely reversible fashion. These attributes are compatible with conventional thin film processing and can yield high-performance devices in transparent layouts. Graphene interconnects possess attractive features for both existing and emerging applications of LEDs in information display, biomedical systems, and other environments.
325 citations
TL;DR: High M(n) PPDT2FBT(H) promoted a strong "face-on" geometry in the blend film, suppressed the formation of an excessively large crystalline domain, and facilitated molecularly intermixed phases with P(NDI2OD-T2), leading to a power conversion efficiency exceeding 5%, which is one of the highest values for all-PSCs reported thus far.
Abstract: The molecular weight of a conjugated polymer is one of the key factors determining the electrical, morphological, and mechanical properties as well as its solubility in organic solvents and miscibility with other polymers. In this study, a series of semicrystalline poly[(2,5-bis(2-hexyldecyloxy)phenylene)-alt-(5,6-difluoro-4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole)] (PPDT2FBT) polymers with different number-average molecular weights (Mn’s) (PPDT2FBTL, Mn = 12 kg/mol; PPDT2FBTM, Mn= 24 kg/mol; PPDT2FBTH, Mn= 40 kg/mol) were synthesized, and their photovoltaic properties as electron donors for all-polymer solar cells (all-PSCs) with poly[[N,N′-bis(2-octyldodecyl)-napthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′-bithiophene)] (P(NDI2OD-T2)) acceptor were studied. The Mn effect of PPDT2FBT on the structural, morphological, electrical, and photovoltaic properties was systematically investigated. In particular, tuning the Mn induced dramatic effects on the aggregation behaviors of the polyme...
325 citations
TL;DR: The 2 brands of NiTi file for use with a reciprocation motion seem to have superior mechanical properties, and both reciprocating files demonstrated significantly higher cyclic fatigue and torsional resistances than ProTaper.
323 citations
National Oceanography Centre, Southampton1, Texas A&M University2, Tohoku University3, University of Bristol4, Ocean Drilling Program5, University of California, Davis6, University of Leicester7, Stockholm University8, University of Paris9, University College London10, University of New Orleans11, University of Florida12, Goethe University Frankfurt13, University of California, Santa Cruz14, National Institute of Oceanography, India15, Imperial College London16, University of Birmingham17, Cardiff University18, Lamont–Doherty Earth Observatory19, University of Münster20, Hokkaido University21, Leibniz Institute of Marine Sciences22, Shimane University23, University of Kiel24, Indiana University of Pennsylvania25, Japan Agency for Marine-Earth Science and Technology26, Ibaraki University27, Kōchi University28, Rice University29, University of Michigan30, University of Otago31, University of Louisiana at Lafayette32, University of Rhode Island33, Spanish National Research Council34, University of South Carolina35, Pennsylvania State University36, Utrecht University37, Pusan National University38, Tongji University39, University of Leeds40, University of Bremen41, University of Hawaii at Manoa42, National Institute of Advanced Industrial Science and Technology43
TL;DR: A carbonate accumulation record that covers the past 53 million years from a depth transect in the equatorial Pacific Ocean is presented and large superimposed fluctuations in carbonate compensation depth are found during the middle and late Eocene.
Abstract: Atmospheric carbon dioxide concentrations and climate are regulated on geological timescales by the balance between carbon input from volcanic and metamorphic outgassing and its removal by weathering feedbacks; these feedbacks involve the erosion of silicate rocks and organic-carbon-bearing rocks. The integrated effect of these processes is reflected in the calcium carbonate compensation depth, which is the oceanic depth at which calcium carbonate is dissolved. Here we present a carbonate accumulation record that covers the past 53 million years from a depth transect in the equatorial Pacific Ocean. The carbonate compensation depth tracks long-term ocean cooling, deepening from 3.0-3.5 kilometres during the early Cenozoic (approximately 55 million years ago) to 4.6 kilometres at present, consistent with an overall Cenozoic increase in weathering. We find large superimposed fluctuations in carbonate compensation depth during the middle and late Eocene. Using Earth system models, we identify changes in weathering and the mode of organic-carbon delivery as two key processes to explain these large-scale Eocene fluctuations of the carbonate compensation depth.
322 citations
Authors
Showing all 24296 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Hyun-Chul Kim | 176 | 4076 | 183227 |
| Taeghwan Hyeon | 139 | 563 | 75814 |
| George C. Schatz | 137 | 1155 | 94910 |
| Darwin J. Prockop | 128 | 576 | 87066 |
| Mark A. Ratner | 127 | 968 | 68132 |
| Csaba Szabó | 123 | 958 | 61791 |
| David E. McClelland | 107 | 602 | 72881 |
| Yong Sik Ok | 102 | 854 | 41532 |
| C. M. Mow-Lowry | 101 | 378 | 66659 |
| I. K. Yoo | 101 | 437 | 32681 |
| Haijun Yang | 100 | 403 | 35114 |
| Buddy D. Ratner | 99 | 501 | 35660 |
| Dong Jo Kim | 98 | 497 | 36272 |
| Shuzhi Sam Ge | 97 | 883 | 40865 |
| B. J. J. Slagmolen | 96 | 349 | 62356 |