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High-performance self-powered color filter-free blue photodetector based on wide-bandgap halide perovskites

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Journal of Materials Science & Technology 2023年第21期152卷 100-108页

作者： Yeonghun Yun Hanbyeol Cho Jina jung sung Woong Yang Devthade Vidyasagar Rajendra Kumar Gunasekaran Sangwook Lee School of Materials Science and Engineering Kyungpook National University(KNU)Daegu 41566South Korea KNU Advanced Material Research Institute Kyungpook National UniversityDaegu 41566South Korea Institute of Microstructure Technology&Light Technology Institute Karlsruhe Institute of TechnologyKarlsruhe 76131Federal Republic of Germany

Blue photodetectors(PDs)are attracting great attention for various *** blue PDs based on inorganic GaP or InGaN absorbers are limited by their expensive,complex,and high-temperature fabrication *** absorber-based blue PDs still have much lower photode-tecting properties than inorganic blue *** this study,a high-performance self-powered blue PD is developed using methylammonium lead halide(MAPbX_(3);X=I,Br,and Cl)perovskites based on the eco-nomic and facile solution process at low *** composition is obtained through halide-composition *** best-performing device exhibits an average external quantum efficiency and an average detectivity of 42.7%and 8.65×10^(11) Jones,respectively,within the blue *** peak responsivity of the proposed PD is 0.174 A W^(−1) at 455 nm,which is comparable to that of commercial gallium phosphide blue PD(0.180 A W^(−1) at 470 nm).Moreover,the proposed device exhibits excellent environmental stability under ambient air *** findings will act as a basis for next-generation image sensor technologies,such as vertically stacked red/green/blue PDs.

关键词： Perovskites Photodetectors Blue Composition engineering Self-powered Wide bandgap

Interstitial lung disease induced by the roots of Achyranthes japonica Nakai:Three case reports

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World Journal of Clinical Cases 2021年第8期9卷 2015-2021页

作者： Do-sik Moon sung-Ho Yoon Seung-Il Lee Sang-Gon Park Yong-Sub Na Department of Pulmonology and Critical Care Medicine Chosun University HospitalGwangju 61453South Korea Department of Internal Medicine Hemato-OncologyChosun University HospitalGwangju 61453South Korea

BACKGROUND The roots of Achyranthes japonica Nakai(AJN),called“Useul-puli,”has been traditionally used to control pain and improve dysfunction in osteoarthritis patients in South *** SUMMARY We described 3 patients diagnosed with herbal medicine induced interstitial lung disease after consuming boiled the roots of *** were referred to our hospital because of the modified Medical Research Council grade 4 *** computed tomography showed bilateral ground-glass opacities with patchy *** treatment with systemic glucocorticoid therapy and discontinuation of the roots of AJN,their symptoms improved,and almost all ground-glass opacities and patchy consolidations on chest radiography and chest computed tomography *** We present three cases of interstitial lung disease induced by the roots of AJN.

关键词： Herb Interstitial lung disease Achyranthes japonica Nakai Case report

Reaction to the COVID-19 pandemic in Seoul with biostatistics

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Infectious Disease Modelling 2022年第3期7卷 419-429页

作者： Seungpil jung Seung-sik Hwang Kyoung-Nam Kim Woojoo Lee Department of Public Health Sciences Graduate School of Public HealthSeoul National University08826Republic of Korea Department of Preventive Medicine and Public Health Ajou University School of MedicineSuwon16499Republic of Korea

This paper discusses our collaboration work with government officers in the health department of Seoul during the COVID-19 ***,we focus on short-term forecasting for the number of new confirmed cases and severe ***,we focus on understanding how much of the current infections has been affected by external influx from neighborhood areas or internal transmission within the *** understanding may be important because it is linked to the government policy determining nonpharmaceutical *** obtain the decomposition of the effect,districts of Seoul should be considered simultaneously,and multivariate time series models are ***,we focus on predicting the number of new weekly confirmed cases for each district in *** detailed prediction may be important to the government policy on resource *** consider an ensemble method to overcome poor prediction performance of simple *** paper presents the methodological details and analysis results of the study.

关键词： Count time series model COVID-19 Endemic-epidemic model

Acute liver injury induces expression of FGF23 in hepatocytes via orphan nuclear receptor ERRγ signaling

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Genes & Diseases 2023年第3期10卷 679-682页

作者： Yoon Seok jung Yong-Hoon Kim Kamalakannan Radhakrishnan jung-Ran Noh jung Hyeon Choi Hyo-Jin Kim Jae-Ho Jeong Steven Dooley Chul-Ho Lee Hueng-sik Choi School of Biological Sciences and Technology Chonnam National UniversityGwangju 61186Republic of Korea Laboratory Animal Resource Center Korea Research Institute of Bioscience and Biotechnology125 Gwahak-roYuseong-guDaejeon 34141Republic of Korea Department of Functional Genomics KRIBB School of BioscienceKorea University of Science and Technology(UST)Daejeon 34113Republic of Korea Combinatorial Tumor Immunotherapy MRC Chonnam National University Medical SchoolHwasun-gunJeonnam 58128Republic of Korea Department of Microbiology Chonnam National University Medical SchoolGwangju 61186Republic of Korea Molecular Hepatology Section Medical Faculty MannheimHeidelberg University69117 HeidelbergGermany

Fibroblast growth factor 23(FGF23)is an osteocyte-and osteoblast-derived hormone that primarily regulates phosphate and vitamin D *** FGF23 levels are abnormally increased in pathological conditions like acute or chronic kidney injury,resulting in disease progression as well as increased rates of morbidity and mortality.^(1) However,FGF23 production in acute liver injury is not fully *** this study.

关键词： FGF23 acute vitamin

Segmented tomographic evaluation of structural degradation of carbon support in proton exchange membrane fuel cells

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Journal of Energy Chemistry 2022年第11期31卷 359-367,I0010页

作者： jung A.Hong Min-Hyoung jung sung Yong Cho Eun-Byeol Park Daehee Yang Young-Hoon Kim Sang-Hyeok Yang Woo-sung Jang Jae Hyuck Jang Hyo June Lee sungchul Lee Hu Young Jeong Young-Min Kim Department of Energy Science Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea Fuel Cell Core Parts Development Cell Hyundai Mobis Co.Ltd.Uiwang 16082Republic of Korea Electron Microscopy&Spectroscopy Team Korea Basic Science Institute(KBSI)Daejeon 34133Republic of Korea Graduate School of Semiconductor Materials and Devices Engineering Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Republic of Korea

The variation of the three-dimensional(3D)structure of the membrane electrode of a fuel cell during proton exchange cycling involves the corrosion/compaction of the carbon *** increasing degradation of the carbon structure continuously reduces the electrocatalytic performance of proton exchange membrane fuel cells(PEM-FCs).This phenomenon can be explained by performing 3D tomographic analysis at the ***,conventional tomographic approaches which present limited experimental feasibility,cannot perform such evaluation and have not provided sufficient structural information with statistical significance thus ***,a reliable methodology is required for the 3D geometrical evaluation of the carbon ***,we propose a segmented tomographic approach which employs pore network analysis that enables the visualization of the geometrical parameters corresponding to the porous carbon structure at a high *** approach can be utilized to evaluate the 3D structural degradation of the porous carbon structure after cycling in terms of local surface area,pore size distribution,and their 3D *** geometrical parameters of the carbon body were demonstrated to be substantially reduced owing to the cycling-induced *** information enables a deeper understanding of the degradation phenomenon of carbon supports and can contribute to the development of stable PEM-FC electrodes.

关键词： Electron tomography Fuel cell Proton exchange membrane Membrane electrode assembly Carbon corrosion

Al^(3+) doped CeO_(2) for proton conducting fuel cells

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International Journal of Minerals,Metallurgy and Materials 2024年第10期31卷 2253-2262页

作者： Sarfraz Shahzad Rasool Muhammad Khalid MAKYousaf Shah Bin Zhu jung-sik Kim Muhammad Imran Asghar Nabeela Akbar Wenjing Dong Jiangsu Provincial Key Laboratory of Solar Energy Science and Technology/Energy Storage joint Research Center School of Energy and EnvironmentSoutheast UniversityNanjing 210096China School of Microelectronics Hubei UniversityWuhan 430062China Sino-French Engineer School/School of General Engineering Beihang UniversityBeijing 100191China Renewable Energy Technologies Group Faculty of Engineering and Natural SciencesTampere UniversityFI-33014Finland

Developing high ionic conducting electrolytes is crucial for applying proton-conducting fuel cell(PCFCs)*** cur-rent study investigates the effect of alumina on the structural,morphological,electrical,and electrochemical properties of CeO_(2).Lattice oxygen vacancies are induced in CeO_(2) by a general doping concept that enables fast ionic conduction at low-temperature ranges(300-500℃)for *** refinement of the X-ray diffraction(XRD)patterns established the pure cubic fluorite structure of Al-doped CeO_(2)(ADC)samples and confirmed Al ions’fruitful integration in the CeO_(2) *** electronic structure of the alumina-doped ceria of the materials(10ADC,20ADC,and 30ADC)has been *** a result,it was found that the best composition of 30ADC-based electrolytes induced maximum lattice oxygen *** corresponding PCFC exhibited a maximum power output of 923 mW/cm^(2)at 500℃.Moreover,the investigation proves the proton-conducting ability of alumina-doped ceria-based fuel cells by using an oxide ion-blocking layer.

关键词： proton ceramic fuel cells oxygen vacancies higher fuel cell performance doping fast ions transportation

Effects of exogenous recombinant human bone morphogenic protein-7 on the corneal epithelial mesenchymal transition and fibrosis

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International Journal of Ophthalmology(English edition) 2017年第3期10卷 329-335页

作者： Jin Kwon Chung Shin Ae Park Hee Sun Hwang Kwang sung Kim Yang Je Cho Yong sung You Young sik Kim Ju Woong Jang sung Jin Lee Department of Ophthalmology Soonchunhyang University College of Medicine Soonchunhyang University Seoul Hospital Seou104401 Korea Eyegene Inc. Seou107528 Korea Nune Eye Hospital Seou106198 Korea Cellumed. Co. Ltd. Seoul 08501 Korea

AIM：To evaluate the effect of exogenous recombinant human bone morphogenic protein-7（rhBMP-7）on transforming growth factor-β（TGF-β）-induced epithelial mesenchymal cell transition（EMT）and assessed its antifibrotic effect via topical ***：The cytotoxic effect of rhBMP-7 was evaluated and the EMT of human corneal epithelial cells（HECEs）was induced by TGF-β. HECEs were then cultured in the presence of rhBMP-7 and/or hyaluronic acid（HA）. EMT markers,fibronectin,E-cadherin,α-smooth muscle actin（α-SMA）,and matrix metaloproteinase-9（MMP-9）,were evaluated. The level of corneal fibrosis and the reepithelization rate were evaluated using a rabbit keratectomy model. Expression of α-SMA in keratocytes were quantified following treatment with different concentrations of ***：Treatment with rhBMP-7 attenuated TGF-β-induced EMT in HECEs. It significantly attenuated fibronectin secretion（31.6%; P〈0.05）,the α-SMA protein level（72.2%; P〈0.01）,and MMP-9 expression（23.6%,P〈0.05）in HECEs compared with cells grown in the presence of TGF-β alone. E-cadherin expression was significantly enhanced（289.7%; P〈0.01）in the presence of rhBMP-7. Topical application of rhBMP-7 combined with 0.1% HA significantly reduced the amount of α-SMA~＋ cells by 43.18%（P〈0.05）at a concentration of 2.5 μg/mL and by 47.73%（P〈0.05）at 25 μg/mL,compared with the control group,without disturbing corneal ***：rhBMP-7 attenuates TGF-β-induced EMT in vitro,and topical application of rhBMP-7 reduces keratocyte myodifferentiation during the early wound healing stages in vivo without hindering reepithelization. Topical rhBMP-7 application as biological eye drops seems to be feasible in diseases involving TGF-β-related corneal fibrosis with corneal reepithelization disorders.

关键词： bone morphogenic protein-7 corneal fibrosis epithelial mesenchymal transition myodifferentiation transforming growth factor-β

Facile Synthesis of Porous Carbon Nitride Spheres with Hierarchical Three-Dimensional Mesostructures for CO_(2) Capture

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Nano Research 2010年第9期3卷 632-642页

作者： Qiang Li Jianping Yang Dan Feng Zhangxiong Wu Qingling Wu sung Soo Park Chang-sik Ha Dongyuan Zhao Department of Chemistry and Shanghai Key Laboratory of MolecularCatalysis and Innovative Materials Laboratory of Advanced MaterialsFudan UniversityShanghai 200433China Department of Polymer Science and Engineering Pusan National UniversityGeumjeong-guBusan 609-735Korea

Porous carbon nitride(CN)spheres with partially crystalline frameworks have been successfully synthesized via a nanocasting approach by using spherical mesoporous cellular silica foams(MCFs)as a hard template,and ethylenediamine and carbon tetrachloride as *** resulting spherical CN materials have uniform diameters of ca.4μm,hierarchical three-dimensional(3-D)mesostructures with small and large mesopores with pore diameters centered at ca.4.0 and 43 nm,respectively,a relatively high BET surface area of~550 m^(2)/g,and a pore volume of 0.90 cm^(3)/***-resolution transmission electron microscope(HRTEM)images,wide-angle X-ray diffraction(XRD)patterns,and Raman spectra demonstrate that the porous CN material has a partly graphitized *** addition,elemental analyses,X-ray photoelectron spectra(XPS),Fourier transform infrared spectra(FT-IR),and CO_(2) temperature-programmed desorption(CO_(2)-TPD)show that the material has a high nitrogen content(17.8 wt%)with nitrogen-containing groups and abundant basic *** hierarchical porous CN spheres have excellent CO_(2) capture properties with a capacity of 2.90 mmol/g at 25℃and 0.97 mmol/g at 75℃,superior to those of the pure carbon materials with analogous *** can be mainly attributed to the abundant nitrogen-containing basic groups,hierarchical mesostructure,relatively high BET surface area and stable ***,the presence of a large number of micropores and small mesopores also enhance the CO_(2) capture performance,owing to the capillary condensation effect.

关键词： Mesoporous materials carbon nitride nanocasting sphere hard template CO_(2)capture

Internal modification in transparent hybrid germanium-silica plates using plasma formation induced by a femtosecond laser

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中国有色金属学会会刊：英文版 2012年第S3期22卷 808-812页

作者： Ji-Wook YOON jung-Kyu PARK Kwang-Ho KIM Myung-Chang KANG sung-Hak CHO Nano Machining Laboratory Korea Institute of Machinery and Materials Department of Nano-Mechatronics University of Science and Technology National Core Research Center for Hybrid Materials Solution Pusan National University

The fabrication of an internal diffraction grating with photoinduced refractive index modification in planar hybrid germanium-silica plates was demonstrated using low-density plasma formation excited by a high-intensity femtosecond (150 fs) Ti:sapphire laser (λp=790 nm).The refractive index modifications with diameters ranging from 400 nm to 3 μm were photoinduced after plasma formation occurred upon irradiation with peak intensities of more than 2×1013 W/*** graded refractive index profile was fabricated to be a symmetric around from the center of the point at which low-density plasma occurred.

关键词： diffraction grating refractive index modification plasma formation hybrid germanium-silica plate femtosecond laser