scispace - formally typeset
Search or ask a question
Institution

Sungkyunkwan University

EducationSeoul, South Korea
About: Sungkyunkwan University is a education organization based out in Seoul, South Korea. It is known for research contribution in the topics: Graphene & Thin film. The organization has 28229 authors who have published 56428 publications receiving 1352733 citations. The organization is also known as: 성균관대학교.


Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, the performance of the modified system is studied using proton-proton collision data at center-of-mass energy √s=13 TeV, collected at the LHC in 2015 and 2016.
Abstract: The CMS muon detector system, muon reconstruction software, and high-level trigger underwent significant changes in 2013–2014 in preparation for running at higher LHC collision energy and instantaneous luminosity. The performance of the modified system is studied using proton-proton collision data at center-of-mass energy √s=13 TeV, collected at the LHC in 2015 and 2016. The measured performance parameters, including spatial resolution, efficiency, and timing, are found to meet all design specifications and are well reproduced by simulation. Despite the more challenging running conditions, the modified muon system is found to perform as well as, and in many aspects better than, previously. We dedicate this paper to the memory of Prof. Alberto Benvenuti, whose work was fundamental for the CMS muon detector.

303 citations

Journal ArticleDOI
TL;DR: In this article, a simple and reproducible method to improve the sensing performance of a graphene gas sensor using ozone treatment and demonstrate it with nitrogen dioxide (NO2) gas was reported.
Abstract: In the present study, we report a simple and reproducible method to improve the sensing performance of a graphene gas sensor using ozone treatment and demonstrate it with nitrogen dioxide (NO2) gas. The ozone-treated graphene (OTG) sensor demonstrated remarkable enhancement of the sensing performances such as percentage response, detection limit and response time. The percentage response of the OTG sensor was twofold higher than that of a pristine graphene sensor when it was exposed to 200 ppm concentration of NO2 at room temperature. It is noteworthy that significant improvement was achieved in the response time by a factor of 8. Extremely low parts-per-billion (ppb) concentrations were clearly detectable, while the pristine graphene sensor could not detect NO2 molecules below 10 ppm concentration. The detection limit of the OTG sensor was estimated to be 1.3 ppb based on the signal to noise ratio, which is the cutting-edge resolution. The present ozone treatment may provide an effective way to improve the performance of the graphene-based sensor, given its simple process, practical usability and cost effectiveness.

303 citations

Journal ArticleDOI
TL;DR: An unprecedented level of cooperation and collaboration has allowed the objective definition of cutoff target ranges for 114 markers to be applied to newborn screening of rare metabolic disorders.

303 citations

Journal ArticleDOI
TL;DR: Results show that chitosan sponges can be used as effective scaffolding materials for tissue engineered bone formation in vitro and corroborated that bone formation within the spongees had occurred.
Abstract: Rat calvarial osteoblasts were grown in porous chitosan sponges fabricated by freeze drying. The prepared chitosan sponges had a porous structure with a 100–200 μm pore diameter, which allowed cell proliferation. Cell density, alkaline phosphatase activity and calcium deposition were monitored for up to 56 d culture. Cell numbers were 4 × 106 (day 1), 11 × 106 (day 28) and 12 × 106 (day 56) per g sponge. Calcium depositions were 9 (day 1), 40 (day 28) and 48 (day 56) μg per sponge. Histological results corroborated that bone formation within the sponges had occurred. These results show that chitosan sponges can be used as effective scaffolding materials for tissue engineered bone formation in vitro.

302 citations

Journal ArticleDOI
14 Feb 2008-Nature
TL;DR: This paper shows, using a combination of diffraction techniques, that the hexagonal manganites RMnO3 undergo an isostructural transition with exceptionally large atomic displacements: two orders of magnitude larger than those seen in any other magnetic material, resulting in an unusually strong magneto-elastic coupling.
Abstract: The motion of atoms in a solid always responds to cooling or heating in a way that is consistent with the symmetry of the given space group of the solid to which they belong1,2. When the atoms move, the electronic structure of the solid changes, leading to different physical properties. Therefore, the determination of where atoms are and what atoms do is a cornerstone of modern solid-state physics. However, experimental observations of atomic displacements measured as a function of temperature are very rare, because those displacements are, in almost all cases, exceedingly small3,4,5. Here we show, using a combination of diffraction techniques, that the hexagonal manganites RMnO3 (where R is a rare-earth element) undergo an isostructural transition with exceptionally large atomic displacements: two orders of magnitude larger than those seen in any other magnetic material, resulting in an unusually strong magneto-elastic coupling. We follow the exact atomic displacements of all the atoms in the unit cell as a function of temperature and find consistency with theoretical predictions based on group theories. We argue that this gigantic magneto-elastic coupling in RMnO3 holds the key to the recently observed magneto-electric phenomenon in this intriguing class of materials6.

302 citations


Authors

Showing all 28506 results

NameH-indexPapersCitations
Michael Grätzel2481423303599
Hyun-Chul Kim1764076183227
Yongsun Kim1562588145619
David J. Mooney15669594172
Jongmin Lee1502257134772
Byung-Sik Hong1461557105696
Inkyu Park1441767109433
Y. Choi141163198709
Kazunori Kataoka13890870412
E. J. Corey136137784110
Pasi A. Jänne13668589488
Suyong Choi135149597053
Intae Yu134137289870
Tae Jeong Kim132142093959
Anders Hagfeldt12960079912
Network Information
Related Institutions (5)
Korea University
82.4K papers, 1.8M citations

98% related

Hanyang University
58.8K papers, 1.1M citations

98% related

Seoul National University
138.7K papers, 3.7M citations

97% related

Kyungpook National University
42.1K papers, 834.6K citations

97% related

Yonsei University
106.1K papers, 2.2M citations

97% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
2023103
2022588
20214,342
20204,248
20194,124
20183,826