연구성과로 돌아가기
2022 연구성과 (43 / 280)
※ 컨트롤 + 클릭으로 열별 다중 정렬 가능합니다.
Excel 다운로드
| WoS | SCOPUS | Document Type | Document Title | Abstract | Authors | Affiliation | ResearcherID (WoS) | AuthorsID (SCOPUS) | Author Email(s) | Journal Name | JCR Abbreviation | ISSN | eISSN | Volume | Issue | WoS Edition | WoS Category | JCR Year | IF | JCR (%) | FWCI | FWCI Update Date | WoS Citation | SCOPUS Citation | Keywords (WoS) | KeywordsPlus (WoS) | Keywords (SCOPUS) | KeywordsPlus (SCOPUS) | Language | Publication Stage | Publication Year | Publication Date | DOI | JCR Link | DOI Link | WOS Link | SCOPUS Link |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ○ | ○ | Article | Engineering Core Size of InP Quantum Dot with Incipient ZnS for Blue Emission | Blue indium phosphide quantum dot (InP QD) is an emerging colloidal semiconductor nanocrystal, considered as a promising next-generation photoactive material for light-emitting purposes. Despite the tremendous progress in blue InP QDs, the synthetic method for tailoring InP core size to realize the blue-emissive QDs still lags behind. This work suggests a synthetic method for blue-emitting InP QDs by engineering the core size with an incipient ZnS (i-ZnS) shell. The formation of i-ZnS complexes, before the tris(trimethylsilyl)phosphine injection (e.g., before core growth process), restrains the overgrowth of InP nuclei by rapidly forming a ZnS shell on its surface, thereby resulting in further dwarfed InP cores. With additional ZnS shell coating, the blue QDs exhibit a photoluminescence quantum yield of approximate to 52% at 483 nm. The origin of bandgap diminution with the increase of shell thickness, or with the utilization of ZnSe shell is unraveled via the first-principles density functional theory simulations. Simulational evidence on InP-core densification with the shell coating, along with accompanying changes in chemical and structural properties, is presented. The blue-emitting InP QD device shows a maximum luminance of 1162 cd m(-2) and external quantum efficiency of 1.4%. | Suh, Yo-Han; Lee, Sanghyo; Jung, Sung-Min; Bang, Sang Yun; Yang, Jiajie; Fan, Xiang-Bing; Zhan, Shijie; Samarakoon, Chatura; Jo, Jeong-Wan; Kim, Yoonwoo; Choi, Hyung Woo; Occhipinti, Luigi G.; Lee, Tae Hoon; Shin, Dong-Wook; Kim, Jong Min | Univ Cambridge, Dept Engn, Elect Engn Div, 9 JJ Thomson Ave, Cambridge CB3 0FA, England; Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea | Occhipinti, Luigi/C-4850-2015; Bang, Sang/AAU-3471-2021; Lee, Sanghyo/AGV-8544-2022; Lee, Tae/B-1160-2013; Choi, Hyung Woo/G-7992-2015; Shin, Dong-Wook/ABG-1275-2021; 羊, 嘉杰/JZD-1458-2024 | 57212025164; 55100969800; 34869850300; 57212314489; 57212610317; 55955689800; 57212057622; 57219766459; 59118861500; 57226426459; 57206180251; 6701867669; 55731221000; 57189355550; 55870047800 | thl@knu.ac.kr;ds887@cam.ac.uk; | ADVANCED OPTICAL MATERIALS | ADV OPT MATER | 2195-1071 | 10 | 7 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY;OPTICS | 2022 | 9 | 9.5 | 3.26 | 2025-06-25 | 37 | 38 | blue emission; density functional theory modeling; incipient ZnS; indium phosphide quantum dots; quantum dot light-emitting diodes | INP/ZNS NANOCRYSTALS; CLUSTERS | blue emission; density functional theory modeling; incipient ZnS; indium phosphide quantum dots; quantum dot light-emitting diodes | Coatings; Density functional theory; II-VI semiconductors; III-V semiconductors; Indium phosphide; Selenium compounds; Semiconducting indium phosphide; Semiconductor quantum dots; Shells (structures); Wide band gap semiconductors; Zinc sulfide; Blue-emission; Core size; Density functional theory modeling; Density-functional-theory; Incipient ZnS; Indium phosphide quantum dot; InP QDs; Quantum-dot light emitting diodes; Synthetic methods; Theory model; Nanocrystals | English | 2022 | 2022-04 | 10.1002/adom.202102372 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Exploration of concentration-reliant optical and luminescence aspects of Sm³⁺: B2O3-Gd2O3-Li2O-Na2O-LiF glasses for color displays and visible lasers utilization | In this work, for seven compositions of 0.1-2.0 mol% Sm3+-doped transparent borate-rich glasses (prepared utilizing a quick and facile melt-quenching process), optical and visible fluorescence traits combined with luminescence decay patterns have been inspected and analyzed thoroughly. By X-ray diffraction, the amorphous phase has been clarified. Absorption spectra displayed distinctive peaks of Sm3+ ion in ultra-violet, visible, and infrared spectral regions. Relying on absorption and fluorescence spectra, for all Sm3+: glasses, J-O (Judd-Ofelt) analysis has been conducted to compute J-O parameters omega(lambda) (lambda = 2, 4, 6) from experimental oscillator strengths, and using such parameters, radiative aspects like transition probabilities, branching ratios, and radiative decay times of (4)G(5/2) metastable state to( 6)H(11/2), H-6(9/2), H-6(7/2), and H-6(5/2) levels have been estimated. omega(2) reduced continually as Sm2O3 content increased from 0.1-2.0 mol%, hinting at improved symmetry and ionicity between Sm3+ ions and related ligands. Four luminescence bands centered at 565 nm, 602 nm, 648 nm, and 710 nm ascribed to transitions from (4)G(5/2) -> H-6(5/2),H- 6(7/2), H-6(9/2), and H-6(11/2) levels sequentially are obtained under intense lambda(exci).= 401 nm. In all emission peaks, the reddish-orange one (602 nm) is identified to be very intense in all glasses. All fluorescence bands' intensity increased up to 0.5 mol% Sm3+ doping level and above 0.5 mol% doping content, intensity reduced regularly owing to the concentration quenching effect caused by the ET (energy transfer) via CR (cross-relaxation) channels among Sm3+ ions. CIE (Commission Internationale de leclairage) coordinates, CCT (correlated color temperature), dominant wavelength, and color purity have been derived from emission spectra of all investigated samples, and derived CIE (x, y) and CCT values are located in the CIE plot's reddish-orange light region, signifying such glasses potential for color displays and orange light-emitting diodes. As CCT 0.25 mol% Sm3+) doping contents accordingly for deducing tau(exp) (experimental decay time). Here tau(exp) of (4)G(5/2) state (lambda(exci.) = 401 nm, lambda(emi.) = 602 nm) gradually decreased with an increase in Sm3+ content from 0.1 m to 2.0 mol%. Non- exponential decay curves are well fitted to the Inokuti-Hirayama model for S = 6, implying that the ET process is of dipole-dipole nature for Sm-Sm ions. Later, effective bandwidth, stimulated emission cross-section, gain bandwidth, and optical gain have been calculated for all Sm(3+ )ion fluorescence transitions in studied glasses. In all samples, possessing lesser CR rates and higher quantum efficiency, 0.1 mol% Sm3+: glass could be opted for producing effective visible lasing action upon violet excitation. (c) 2022 Elsevier B.V. All rights reserved. | Lakshminarayana, G.; Meza-Rocha, A. N.; Soriano-Romero, O.; Caldino, U.; Lira, A.; Lee, Dong-Eun; Yoon, Jonghun; Park, Taejoon | Kyungpook Natl Univ, Intelligent Construct Automat Ctr, 80 Daehak Ro, Daegu 41566, South Korea; CONACYT Benemerita Univ Autonoma Puebla, Fac Ciencias Fis Matemat, Fis Aplicada, Av San Claudio & Av 18 Sur, Puebla 72570, Pue, Mexico; Benemerita Univ Autonoma Puebla, Fac Ciencias Fis Matemat, Fis Aplicada, Av San Claudio & Av 18 Sur, Puebla 72570, Pue, Mexico; Univ Autonoma Metropolitana Iztapalapa, Dept Fis, POB 55-534, Mexico City 09340, DF, Mexico; Univ Autonoma Estado Mexico, Fac Ciencias, Dept Fis, Toluca 50000, Mexico; Kyungpook Natl Univ, Sch Architecture Civil Environm & Energy, 1370 Sangyeok Dong, Daegu 702701, South Korea; Hanyang Univ, BK21 Four ERICA ACE Ctr, Dept Mech Engn, 55 Hanyangdaehak Ro, Ansan 15588, Gyeonggi Do, South Korea; Hanyang Univ, Dept Robot Engn, 55 Hanyangdaehak Ro, Ansan 15588, Gyeonggi Do, South Korea | LIRA, ALICIA/O-6173-2015; Lira, Alicia/M-4722-2019 | 57194637883; 37063511900; 57201460286; 56110056100; 6603757680; 56605563300; 56449838900; 55717001200 | gandham@knu.ac.kr;dolee@knu.ac.kr;yooncsmd@gmail.com;taejoon@hanyang.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 926 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2022 | 6.2 | 9.5 | 0.97 | 2025-06-25 | 11 | 11 | B2O3-rich glasses; Sm3+; J-O analysis; Luminescence traits; CIE color coordinates; Visible laser | JUDD-OFELT PARAMETERS; ENERGY-TRANSFER; SPECTROSCOPIC PROPERTIES; RADIATIVE PROPERTIES; BORATE GLASSES; IONS; TEMPERATURE; ZINC; INTENSITIES; ABSORPTION | B<sub>2</sub>O<sub>3</sub>-rich glasses; CIE color coordinates; J-O analysis; Luminescence traits; Sm<sup>3+</sup>; Visible laser | English | 2022 | 2022-12-10 | 10.1016/j.jallcom.2022.166936 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Field-Induced Structural Transitions in Liquid Crystal Microemulsions | Liquid crystal (LC) droplets have fascinating properties, such as anisotropic properties, in response to external stimuli. As LC droplet size may determine the proper application of soft composites, various results from numerical simulations and experimental observations of LC droplets are reported. Here, detailed topological responses of individual bipolar droplets to electric fields, are shown. The integration of each response influences the entire electro-optic behavior. Monodispersed LC bipolar droplets are fabricated in a polyvinyl alcohol-dissolved aqueous solution via a membrane-emulsification method. The planar anchoring, provided by the polyvinyl alcohol surface, and surface elasticity, guide the entire LC director configuration, associated with topological defects, in the droplets. By simply blade-coating the solution, bipolar axes of the droplets can be randomly placed on a flat substrate. Two different subsequential stages are found when applying voltages: 1) director reorientation, which is threshold-less and 2) topological defect movement, which exhibits a threshold-like behavior. Various initial directions of the bipolar axes with respect to the field direction provide the transition voltage between these two stages. It is believed that this study can provide important clues to handle several fundamental issues in electro-optics of encapsulated LCs, such as the determination of response times, threshold, and operating voltages. | Kim, MinSu; Manda, Ramesh; Lee, DaYeon; Lee, Jae-Won; Nauman, Asad; Kim, Hak-Rin; Lee, Seung Hee | Jeonbuk Natl Univ, Dept Nano Convergence Engn, Jeonju 54896, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea; Jeonbuk Natl Univ, Dept Polymer Nano Sci & Technol, Jeonju 54896, South Korea | Kim, Hak-Rin/T-1897-2019; Kim, MinSu/AED-3387-2022; Manda, Ramesh/D-7315-2015 | 57219585425; 57194193627; 57419285000; 58377059800; 57796499100; 7410124944; 56304432800 | rineey@knu.ac.kr;lsh1@jbnu.ac.kr; | ADVANCED OPTICAL MATERIALS | ADV OPT MATER | 2195-1071 | 10 | 19 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY;OPTICS | 2022 | 9 | 9.5 | 0.28 | 2025-06-25 | 2 | 3 | bipolar droplets; electro-optics; encapsulation; liquid crystals; microemulsions | NANO-DROPLETS | bipolar droplets; electro-optics; encapsulation; liquid crystals; microemulsions | Drops; Electric fields; Electrospinning; Emulsification; Microemulsions; Polyvinyl alcohols; Topology; Anisotropic property; Bipolar droplet; Electro-optics; Field-induced; Liquid-crystal droplets; Liquid-crystals; Property; Structural transitions; Topological defect; Transitions in liquid crystals; Liquid crystals | English | 2022 | 2022-10 | 10.1002/adom.202200563 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Intense 2.9 μm mid-infrared emission from Dy³⁺/Yb³⁺: SrF2 crystal under 975 nm excitation | The intense 2.9 mu m MIR (mid-infrared) luminescence corresponding to the Dy3+: H-6(13/2 )-> H-6(15/2) transition was achieved for the first time in Dy3+/Yb3+ ions co-doped SrF2 crystals. 2 at% Dy3+: SrF2, 2 at% Dy3+/5 at% Yb3+: SrF2, and 5 at% Yb3+: SrF2 crystals were grown by Bridgman method. The influence of Yb3+ on its spectral properties and energy transfer mechanisms has been studied. In comparison to Dy3+ doped SrF2 crystals, Dy3+/Yb3+ co-doped crystals exhibit not only intense 2.9 mu m emission but also longer high laser energy level lifetimes, favoring 2.9 mu m population inversion and lasing behavior. Furthermore, the ET efficiency from Yb3+ to Dy3+ in Dy3+/Yb3+ co-doped crystals is found to be as high as 95.34%, indicating that the ET from Yb3+ is efficient. The results show that incorporating Yb3+ into Dy3+: SrF2 crystals improves the ability to achieve 2.9 mu m lasing action, which could be used as a potential gain media for laser diode-pumped MIR lasers. (C) 2022 Elsevier B.V. All rights reserved. | Gao, Xiangqi; Zou, Yaqian; Zheng, Longxing; Wang, Yan; Zhu, Zhaojie; You, Zhenyu; Li, Jianfu; Sun, Yijian; Lakshminarayana, G.; Tu, Chaoyang | Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, Fuzhou 350002, Fujian, Peoples R China; Fujian Normal Univ, Coll Chem & Mat Sci, Fuzhou 350007, Fujian, Peoples R China; Fujian Sci & Technol Innovat Lab Optoelect Informa, Fuzhou 350108, Fujian, Peoples R China; Univ Chinese Acad Sci, Beijing 100039, Peoples R China; Fuzhou Univ, Coll Chem, Fuzhou 350116, Fujian, Peoples R China; Jiangxi Univ Sci & Technol, Fac Mat Met & Chem, Ganzhou 341000, Jiangxi, Peoples R China; Kyungpook Natl Univ, Intelligent Construct Automat Ctr, 80 Daehak Ro, Daegu 41566, South Korea | 57220601626; 57322958600; 57487931500; 55992327100; 7404803891; 7102207842; 8643618700; 56449531400; 57194637883; 55543060400 | tcy@fjirsm.ac.cn; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 907 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2022 | 6.2 | 9.5 | 1.06 | 2025-06-25 | 12 | 12 | Crystals; Yb3+; Dy3+; Dy3+/Yb3+; ET; MIR laser | LASER PERFORMANCE; FIBER LASER; 1ST-PRINCIPLES CALCULATIONS; TELLURITE GLASSES; GROWTH; IONS; ER | Crystals; Dy<sup>3+</sup>; Dy<sup>3+</sup>/Yb<sup>3+</sup>; ET; MIR laser; Yb<sup>3+</sup> | Crystal growth from melt; Crystals; Energy transfer; Fluorine compounds; Pumping (laser); Strontium compounds; Ytterbium compounds; Yttrium compounds; Co-doped; Doped crystals; Dy3+; Dy3+/yb3+; ET; Infrared-laser; Mid-infrared emission; Mid-infrared laser; Midinfrared; Yb3+; Infrared devices | English | 2022 | 2022-06-25 | 10.1016/j.jallcom.2022.164513 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Interdependence of the electrical performance of NiCuFeCoMn multi-structure carbonates as electrode material for supercapacitors | Mesoporous NiCuFeCoMn multi-structure compounds were grown as cathodes for supercapacitors using a hydrothermal method. A multi-structure electrode was constructed using a variety of nanostructures by varying the reaction time. These diverse nanostructures were highly beneficial in achieving a high electrical performance by increasing the electrode/electrolyte contact area and shortening the ion diffusion path. Optimized multi-structure arrays, which were heated for 12 h, had an excellent maximum specific capacitance of 1241 F g-1 at 3 A g-1, significantly greater than that of the other electrodes. Furthermore, the multi-structure electrode exhibited exceptional cycling stability, with 84.7% retention of the original capacitance after 5000 cycles. Moreover, an asymmetric supercapacitor with the optimized multi-structure compound as the positive electrode and graphene as the negative electrode demonstrated a high energy density of 61 W h kg-1 at a power density of 1017 W k g-1 and exceptional cycling stability by retaining 88.5% of the initial capacity after 5000 cycles. Additionally, the as-obtained asymmetric supercapacitor was capable of powering an LED light. Thus, in terms of electrical performance, the asymmetric supercapacitor fabricated with the NiCuFeCoMn multi-structure compounds outperformed the majority of previously reported transition-metal-based carbonate hydroxide asymmetric supercapacitors. (c) 2022 Elsevier B.V. All rights reserved. | Verma, Anjneya; Kim, Kwang Ho; Mathur, Sanjay; Lee, Damin | Univ Cologne, Inst Inorgan & Mat Chem, D-50939 Cologne, Germany; Pusan Natl Univ, Global Frontier R&D Ctr Hybrid Interface Mat, Pusan 46241, South Korea; Kyungpook Natl Univ, Reg Leading Res Ctr Smart Energy Syst, Daegu 41566, South Korea; DGIST, Div Nanotechnol, 333 Techno Jungang Daero, Daegu 42988, South Korea | Kim, Hee-Je/O-3501-2019 | 57218462391; 57199439961; 59120618600; 57194601076 | sanjay.mathur@uni-koeln.de;damin91@knu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 922 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2022 | 6.2 | 9.5 | 1.94 | 2025-06-25 | 24 | 23 | Multi -structure electrode; Faradaic capacitor; Carbonate hydroxide; Hydrothermal method; Supercapacitors | LAYERED DOUBLE HYDROXIDE; ASYMMETRIC SUPERCAPACITORS; CUCO2O4 NANOSHEETS; GRAPHENE SHEETS; NANOWIRE ARRAYS; POROUS NIO; NICKEL; GROWTH; FILMS; COMPOSITES | Carbonate hydroxide; Faradaic capacitor; Hydrothermal method; Multi-structure electrode; Supercapacitors | Capacitance; Cathodes; Copper alloys; Nanostructures; Transition metals; Asymmetric supercapacitor; Carbonate hydroxide; Cycling stability; Electrical performance; Electrode material; Faradaic capacitor; Hydrothermal methods; Mesoporous; Multi-structure electrode; Multistructures; Supercapacitor | English | 2022 | 2022-11-20 | 10.1016/j.jallcom.2022.166222 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Investigation of spectroscopic and photoluminescence properties of Erbium doped phosphate (P2O5-K2O3-Al2O3) glasses | Erbium (Er) doped P2O5-K2O3-Al2O3:Er2O3 glasses (KPEr) with different contents of Er3+ ions were fabricated by famous melt-quenching technique. The fabricated samples were characterized by using physical, X-ray photoelectron spectroscopy (XPS), photoluminescence, absorption, and J-O analysis techniques. The XRF analyses were performed in order to know the change in elemental composition of fabricated glasses, while using the various concentrations of Er3+ ions. Three emission peaks were observed, two peaks in visible regions of 526 nm (H-2(11/2) -> I-4(15/2)) and 550 nm (S-4(3/2) -> I-4(15/2)) and one peak in near infrared (NIR) region of 1545 nm (I-4(13/2) -> I-4(15/2)). Nine peaks were observed in absorption spectra in the range of 390-1800 nm. The trend of JO parameters for the present KPEr6 glass sample is Omega(2) > Omega(4) > Omega(6). Higher values of stimulated emission cross-section sigma(emi)(lambda), full wave half maxima FWHM and (FWHM x sigma(emi) (lambda)), for KPEr6 indicate that the present glass has potential candidate to be used for broadband amplification in telecommunication. The McCumber theory is used to study absorption and emission cross-section for I-4(13/2) -> I-4(15/2) transition. The luminescence colors of these samples were almost entirely fall in the yellow green (Y-G) region (x = 0.33, y = 0.64) in the CIE 1931 diagram. The calculated CCT values for our prepared glasses were found to be 5554 K. The present study suggest that KPEr glass samples have potential candidate for broadband amplification in telecommunication, green LED and display devices. (C) 2021 Elsevier B.V. All rights reserved. | Zaman, F.; Rooh, G.; Chanthima, N.; Khan, S. U.; Kim, H. J.; Kothan, S.; Chanlek, N.; Arshad, M.; Kaewkhao, J. | Univ Buner, Fac Sci, Dept Phys, Swari 17290, Pakistan; Abdul Wali Khan Univ, Fac Sci, Dept Phys, Mardan 23200, Pakistan; Nakhon Pathom Rajabhat Univ, Ctr Excellence Glass Technol & Mat Sci CEGM, Nakhon Pathom Dist 73000, Nakhon Pathom, Thailand; Nakhon Pathom Rajabhat Univ, Fac Sci & Technol, Phys Program, Nakhon Pathom Dist 73000, Nakhon Pathom, Thailand; Kyungpook Natl Univ, Dept Phys, Deagu 702701, South Korea; Chiang Mai Univ, Fac Associated Med Sci, Ctr Radiat Res & Med Imaging, Dept Radiol Technol, Chiang Mai 50200, Thailand; Synchrotron Light Res Inst Publ Org, Nakhon Ratchasima 30000, Thailand; Univ Peshawar, Fac Numer & Phys Sci, Dept Elect, Peshawar, Pakistan | Zaman, Farasat/AAE-1144-2020; Chanthima, Natthakridta/HRC-8083-2023; Rooh, Gul/AAF-2076-2019; Khan, Shafqat Ullah/JBS-5943-2023 | 57188710334; 24401665700; 35361597600; 57291950000; 59051568100; 6507017165; 24775167600; 25722979300; 23974520300 | falakzaman88@gmail.com;jakrapong@webmail.npru.ac.th; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 893 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2022 | 6.2 | 9.5 | 3 | 2025-06-25 | 31 | 34 | KPEr; luminescence; glasses; spectra | ELECTRONIC POLARIZABILITY; OPTICAL BASICITY; ER3+ IONS; LUMINESCENCE | glasses; KPEr; luminescence; spectra | Alumina; Aluminum oxide; Display devices; Fabrication; Infrared devices; Photoluminescence; X ray photoelectron spectroscopy; Analysis techniques; Broadband amplification; Elemental compositions; Emission peaks; Erbium doped; Glass samples; Melt quenching techniques; Photoluminescence properties; Spectra's; Spectroscopic property; Glass | English | 2022 | 2022-02-10 | 10.1016/j.jallcom.2021.162215 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Magnetically sensitive TiO2 hollow sphere/Fe3O4 core-shell hybrid catalyst for high-performance sunlight-assisted photocatalytic degradation of aqueous antibiotic pollutants | Owing to the ease of catalyst separation and recycling, magnetically sensitive catalysts are essential for developing a cost-effective method for the photocatalytic degradation of aqueous organic pollutants. This study demonstrates the efficacy of a magnetically sensitive TiO2 hollow sphere/Fe3O4 (THS/FO) core-shell hybrid catalyst for the sunlight-assisted degradation of aqueous antibiotic pollutants, namely amoxicillin (AMC) and levofloxacin (LVF). To fabricate this core-shell hybrid catalyst, THS was first synthesized via a wrap-bake-peel approach using SiO2 templates and FO nanoparticles were then carefully deposited on the THS surface via an in situ growth method. The THS/FO core-shell hybrid catalyst exhibited significantly higher activity for degrading AMC and LVF than THS under simulated sunlight. Moreover, the activity results indicate that the proposed hybrid catalyst outperforms numerous reported photocatalysts owing to its strong optical response properties and the synergistic effect of THS and FO due to the core-shell configuration of the hybrid catalyst, which facilitates charge separation. Additionally, due to the strong magnetic properties of the hybrid catalyst, the catalyst can be magnetically recovered and reused in the AMC and LVF degradation processes without exhibiting a significant loss in its activity even after five consecutive test cycles. Thus, the hybrid catalyst designed herein promotes the use of practical photocatalytic techniques for treating aqueous antibiotic pollutants. (C) 2022 Elsevier B.V. All rights reserved. | Lee, Dong-Eun; Devthade, Vidyasagar; Moru, Satyanarayana; Jo, Wan-Kuen; Tonda, Surendar | Kyungpook Natl Univ, Sch Architecture Civil Environm & Energy Engn, 80 Daehak Ro, Daegu 41566, South Korea; Kyungpook Natl Univ, Dept Mat Sci & Engn, 80 Daehak Ro, Daegu 41566, South Korea; Kakatiya Inst Technol & Sci, Dept Phys Sci, Warangal 506015, Telangana, India | Moru, Satyanarayana/AAF-3189-2021; Tonda, Surendar/AAO-3358-2020; Jo, Wan/AAO-5329-2020; Vidyasagar, Devthade/O-3930-2015; MORU, SATYANARAYANA/AAF-3189-2021 | 56605563300; 57201674442; 58562229700; 7103322277; 56114866900 | wkjo@knu.ac.kr;surendar.t86@gmail.com; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 902 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2022 | 6.2 | 9.5 | 3.44 | 2025-06-25 | 38 | 39 | TiO2 hollow sphere; Fe3O4; Core-shell hybrid catalyst; Magnetic separation; Pollutant degradation | COMPOSITE PHOTOCATALYSTS; AQUATIC ENVIRONMENT; ANATASE TIO2; EFFICIENT; REDUCTION; CO2; CONSTRUCTION; SPHERES; WATER; HETEROJUNCTION | Core-shell hybrid catalyst; Fe<sub>3</sub>O<sub>4</sub>; Magnetic separation; Pollutant degradation; TiO<sub>2</sub> hollow sphere | Antibiotics; Catalyst activity; Cost effectiveness; Magnetic separation; Magnetite; Optical properties; Organic pollutants; Photocatalytic activity; Shells (structures); Silica; SiO2 nanoparticles; Spheres; Synthesis (chemical); TiO2 nanoparticles; Amoxicillin; Core-shell hybrid catalyst; Core-shell hybrids; Hollow sphere; Hybrid catalysts; Levofloxacin; Photocatalytic degradation; Pollutant degradation; TiO2 hollow sphere; ]+ catalyst; Titanium dioxide | English | 2022 | 2022-05-05 | 10.1016/j.jallcom.2022.163612 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Metal- and non-metal-incorporated vitamin B12 on graphene as a bio-derived electrocatalyst for the high-performance oxygen reduction reaction in acidic media | The development of fine-tuned non-platinum group metals and their derivatives, which are high-performance, economical, and stable electrocatalysts used for the oxygen reduction reaction (ORR), is critical for the large-scale deployment of fuel cells and metal-air batteries. This study presents a novel strategy that uses vitamin B12 (VB) as a bioinspired resource for the ORR; VB was modified using metal and non-metal incorporation to boost the efficiency of the ORR. The chemical structure of VB on a graphene substrate was tailored by synergistically incorporating both iron and sulfur upon pyrolysis, yielding various active sites based on Fe-(N,S)-C and Co-(N,S)-C. The resultant catalysts, termed Fe-SVB/GR, exhibit prominent electrocatalytic performance for the ORR via a favorable 4e(-) reaction pathway. The onset and half-wave potentials of the optimized electrocatalyst were 0.90 and 0.74 V vs. reversible hydrogen electrode, respectively, which are comparable or better than those previously reported for non-platinum group catalysts. The Fe-SVB/GR electrocatalyst developed in this study outperformed a commercial Pt/C catalyst in terms of its durability and methanol tolerance. Therefore, this study introduced a novel strategy to produce bio-derived materials as non-platinum group electrocatalysts used as efficient cathode materials in energy-conversion devices. (c) 2022 Elsevier B.V. All rights reserved. | Lee, Dong-Eun; Moru, Satyanarayana; Jo, Wan-Kuen; Tonda, Surendar | Kyungpook Natl Univ, Sch Architecture Civil Environm & Energy Engn, 80 Daehak Ro, Daegu 41566, South Korea; Kakatiya Inst Technol & Sci, Dept Phys Sci, Warangal 506015, Telangana, India | Jo, Wan/AAO-5329-2020; Tonda, Surendar/AAO-3358-2020; MORU, SATYANARAYANA/AAF-3189-2021 | 56605563300; 58562229700; 7103322277; 56114866900 | surendar.t86@gmail.com; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 912 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2022 | 6.2 | 9.5 | 0.53 | 2025-06-25 | 6 | 6 | Vitamin B-12; Bioresource; Electrocatalysis; Bimetallic catalyst; Oxygen reduction reaction | FE-N-C; BIFUNCTIONAL ELECTROCATALYST; CARBON NANOSHEETS; ACTIVE-SITES; FUEL-CELLS; EFFICIENT; CATALYST; NITROGEN; HYDROGEN; ALKALINE | Bimetallic catalyst; Bioresource; Electrocatalysis; Oxygen reduction reaction; Vitamin B<sub>12</sub> | Catalyst activity; Cathodes; Electrocatalysts; Electrolytic reduction; Energy conversion; Fuel cells; Graphene; Metals; Oxygen; Platinum compounds; Acidic media; Bimetallic catalysts; Bioresource; Non-metals; Non-platinum; Novel strategies; Oxygen reduction reaction; Performance; Platinum group metals; Vitamin B12; Electrocatalysis | English | 2022 | 2022-08-15 | 10.1016/j.jallcom.2022.165118 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Optimized electronic performance in half-Heusler Ti-doped NbFeSb materials by stoichiometric tuning at the Fe and Sb sites | Electronic structure is known to be highly influenced by the site occupancy and the stoichiometry of the material which in turn largely effects the thermoelectric properties. Herein, we present electronic calculations using density functional theory (DFT) of non-stoichiometric Ti doped NbFeSb configuration, showing the effect of the anti-site Fe atoms on the electronic properties, and supporting them with experimental results of the prepared Nb0.8Ti0.2Fe1+xSb1-x samples. The electronic structure of the non-stoichiometric sample shows the introduction of two distinct peaks near the Fermi level by the Fe atoms at the Sb sites. These resonance states are known to cause an increase in the density of states effective mass near the Fermi level, which explains the increase in the Seebeck coefficient in the sample x = 0.03 compared to the sample x = 0.00. In addition, a comparatively higher electrical conductivity is reported from sample x = 0.03, which is attributed to the aliovalent substitution of Sb atoms by Fe atoms. The simultaneous increase in the Seebeck coefficient and electrical conductivity culminates in an increased power factor of similar to 50.3 mu W/cmK(2) at 373 K, which is similar to 46% higher than that of samples x = 0.00 and x = 0.05, highlighting the possibility of increasing the power density by stoichiometric variation to achieve the high joule-per-dollar performance of NbFeSb-based TE devices, the relevance of which is also currently emphasized in the quest for commercial viability. (C) 2021 Elsevier B.V. All rights reserved. | Kahiu, Joseph Ngugi; Shenoy, U. Sandhya; Kihoi, Samuel Kimani; Kim, Hyunji; Yi, Seonghoon; Bhat, D. Krishna; Lee, Ho Seong | Kyungpook Natl Univ, Dept Hydrogen & Renewable Energy, 80 Daehak Ro, Daegu 41566, South Korea; Srinivas Univ, Dept Chem, Coll Engn & Technol, Mangalore 574146, Karnataka, India; Kyungpook Natl Univ, Sch Mat Sci & Engn, 80 Daehak Ro, Daegu 41566, South Korea; Natl Inst Technol Karnataka, Dept Chem, Mangalore 575025, Karnataka, India | ; BHAT, DENTHAJE/Y-8524-2019; Yi, Seonghoon/HGC-6912-2022; Shenoy, U/AAW-2458-2021; Kihoi, Samuel Kimani/IUM-8515-2023 | 57222096169; 56494709500; 57208396874; 57208408040; 14008383000; 15130527000; 55706810400 | hs.lee@knu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 891 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2022 | 6.2 | 9.5 | 1.67 | 2025-06-25 | 18 | 19 | Resonant states; Electronic structure; P-type half-Heusler; Power density; Thermoelectric materials | THERMOELECTRIC PROPERTIES; HIGH-TEMPERATURE; WASTE HEAT; POWER; NIOBIUM; IRON | Electronic structure; P-type half-Heusler; Power density; Resonant states; Thermoelectric materials | Antimony; Atoms; Density functional theory; Electric conductivity; Electronic properties; Fermi level; Iron; Niobium compounds; Seebeck coefficient; Thermoelectric equipment; Titanium compounds; Electronic.structure; Fe atoms; Half-heusler; P-type; P-type half-heusler; Power densities; Resonant state; Thermo-Electric materials; Thermoelectric material; Ti doped; Electronic structure | English | 2022 | 2022-01-25 | 10.1016/j.jallcom.2021.162033 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Performance of Bi2Te3-based thermoelectric modules tailored by diffusion barriers | Fifty-pair Bi2Te3-based thermoelectric (TE) modules were produced by spreading Sn alloy solder on Cu electrodes before heating at 270 degrees C for 10 min to connect Bi2Te3-based legs with Cu electrodes. To suppress unexpected reactions between solder and TE materials, a conventional electroless nickel (EN) layer and a novel coating encompassing EN, electroless palladium, and immersion gold (ENEPIG) layers were adopted for Bi2Te3 materials as diffusion barriers. Influence of different diffusion barriers, namely, EN and ENEPIG, on TE performance of module was ascertained. Interfacial structure at Bi2Te3/solder/Cu electrode interface revealed that intermetallic compounds were generated owing to interdiffusion among Cu, Sn, and coating elements, and they mostly concentrated at Bi2Te3/solder and solder/Cu electrode interfaces. Additionally, ENEPIG coating exhibited much better wettability with solder than the EN coating, resulting in fewer defect sites at Bi2Te3/solder interface. When current flowed through TE modules, the ENEPIG-coated module yielded lower temperatures on both hot and cold sides than the EN-coated module. While the modules had temperature differences between two substrates, output power generated by the ENEPIG-coated module was higher than that of the EN-coated module. In addition, the ENEPIG-coated module showed a smaller internal resistance than the EN-coated module. After heating at 200 degrees C for 200 h, both modules presented markedly reduced output power, whereas internal resistance was escalated. (C) 2021 Elsevier B.V. All rights reserved. | Yen Ngoc Nguyen; Kim, Kyung-Tae; Chung, Soo-Ho; Son, Injoon | Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea; Korea Inst Mat Sci, Powder Mat Div, Chang Won 51508, Gyeongnam, South Korea | Nguyen, Yen/CAJ-4943-2022 | 57197767959; 56984373000; 57349911300; 9942975800 | ijson@knu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 895 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2022 | 6.2 | 9.5 | 1.15 | 2025-06-25 | 11 | 13 | Thermoelectric; Coating materials; Surfaces and interfaces; Intermetallics | OPTIMAL NI(P) THICKNESS; INTERFACIAL REACTIONS; POWER-GENERATION; BONDING STRENGTH; SOLDER; NI; RESISTANCE; BI | Coating materials; Intermetallics; Surfaces and interfaces; Thermoelectric | Bismuth alloys; Bismuth compounds; Diffusion barriers; Diffusion coatings; Electrodes; Gold coatings; Thermoelectricity; Tin alloys; Coating material; Cu electrode; Electrode interface; Electroless; Electroless nickel; Gold-coated; Nickel coated; Surfaces and interfaces; Thermo-electric modules; Thermoelectric; Intermetallics | English | 2022 | 2022-02-25 | 10.1016/j.jallcom.2021.162716 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Rational Engineering of Homoserine O-Succinyltransferase from Escherichia coli for Reduced Feedback Inhibition by Methionine | Methionine is an essential amino acid in all living organisms and has been used in various industrial applications such as food and feed additives. However, inhibition of enzymes involved in methionine biosynthesis is considered to be a crucial bottleneck for an efficient bio-based methionine production process. Homoserine O-succinyltransferase fromEscherichia coli (EcHST) has been reported to be feedback inhibited by the final product methionine. To understand the regulation mechanism of the enzyme and generate a feedback-resistant mutant, we determined the crystal structure of EcHST and elucidated the binding site of homoserine and succinyl-CoA. The enzyme kinetic experiments of EcHST revealed that the enzyme is noncompetitively inhibited by methionine with a K-i value of 2.44 mM, and we also identified a putative inhibitor binding site located in the vicinity of the substrate binding site. We then generated the EcHSTT242A variant with reduced feedback inhibition with a K-i value of 17.40 mM. | Sagong, Hye-Young; Lee, Donghoon; Kim, Il-Kwon; Kim, Kyung-Jin | Kyungpook Natl Univ, Sch Life Sci, BK21 FOUR KNU Creat BioRes Grp, Daegu 41566, South Korea; Kyungpook Natl Univ, KNU Inst Microorganisms, Daegu 41566, South Korea | Kim, Kyung-Jin/MVY-3405-2025 | 57006554000; 57207418964; 56547774100; 55510867400 | kkim@knu.ac.kr; | JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | J AGR FOOD CHEM | 0021-8561 | 1520-5118 | 70 | 5 | SCIE | AGRICULTURE, MULTIDISCIPLINARY;CHEMISTRY, APPLIED;FOOD SCIENCE & TECHNOLOGY | 2022 | 6.1 | 9.5 | 1.14 | 2025-06-25 | 10 | 11 | Escherichia coli; homoserine O-succinyltransferase; methionine; feedback inhibition | ENZYME-CATALYZED ACYLATION; MECHANISTIC CHARACTERIZATION; REPLACEMENT | Escherichia coli; feedback inhibition; homoserine O-succinyltransferase; methionine | Escherichia coli; Escherichia coli Proteins; Feedback; Homoserine; Homoserine O-Succinyltransferase; Methionine; Additives; Amino acids; Biochemistry; Crystal structure; Enzyme inhibition; Escherichia coli protein; homoserine; homoserine succinyltransferase; methionine; Binding-sites; Essential amino acids; Feed additives; Feedback inhibition; Homoserine; Homoserine O-succinyltransferase; Living organisms; Methionine; Methionine biosynthesis; Reduced feedbacks; Escherichia coli; feedback system; genetics; Escherichia coli | English | 2022 | 2022-02-09 | 10.1021/acs.jafc.1c07211 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | Article | Sustainable Production of Shinorine from Lignocellulosic Biomass by Metabolically Engineered Saccharomyces cerevisiae | Mycosporine-like amino acids (MAAs) have been used in cosmetics and pharmaceuticals. The purpose of this work was to develop yeast strains for sustainable and economical production of MAAs, especially shinorine. First, genes involved in MAA biosynthetic pathway from Actinosynnema mirum were introduced into Saccharomyces cerevisiae for heterologous shinorine production. Second, combinatorial expression of wild and mutant xylose reductase was adopted in the engineered S. cerevisiae to facilitate xylose utilization in the pentose phosphate pathway. Finally, the accumulation of sedoheptulose 7-phosphate (S7P) was attempted by deleting transaldolase-encoding TAL1 in the pentose phosphate pathway to increase carbon flux toward shinorine production. In fed-batch fermentation, the engineered strain (DXdT-M) produced 751 mg/L shinorine in 71 h. Ultimately, 54 mg/L MAAs was produced by DXdT-M from rice straw hydrolysate. The results suggest that shinorine production by S. cerevisiae might be a promising process for sustainable production and industrial applications. © 2022 American Chemical Society. | Kim, So-Rim; Cha, Minseok; Kim, Taeok; Song, Sihoon; Kang, Hye Jee; Jung, Younghoon; Cho, Jeong-Yong; Moh, Sang Hyun; Kim, Soo-Jung | Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju, 61186, South Korea; Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju, 61186, South Korea; Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju, 61186, South Korea; Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju, 61186, South Korea; School of Food Science and Biotechnology, Institute of Fermentation Biotechnology, Kyungpook National University, Daegu, 41566, South Korea; School of Food Science and Biotechnology, Institute of Fermentation Biotechnology, Kyungpook National University, Daegu, 41566, South Korea; Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju, 61186, South Korea, Department of Food Science and Technology, Chonnam National University, Gwangju, 61186, South Korea; Bio-FD&C Co., Ltd., Incheon, 21990, South Korea; Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju, 61186, South Korea, Department of Food Science and Technology, Chonnam National University, Gwangju, 61186, South Korea | 57340120900; 55455907100; 57340644100; 58002807400; 57219656318; 55550063700; 7403535508; 26026377700; 57092299400 | bioksj@jnu.ac.kr; | Journal of Agricultural and Food Chemistry | J AGR FOOD CHEM | 0021-8561 | 1520-5118 | 70 | 50 | SCIE | AGRICULTURE, MULTIDISCIPLINARY;CHEMISTRY, APPLIED;FOOD SCIENCE & TECHNOLOGY | 2022 | 6.1 | 9.5 | 1.04 | 2025-06-25 | 12 | lignocellulose; mycosporine-like amino acids (MAAs); Saccharomyces cerevisiae; shinorine | Biomass; Fermentation; Lignin; Saccharomyces cerevisiae; Xylose; Amino acids; Biomass; Sustainable development; Yeast; lignin; lignocellulose; shinorine; xylose; Amino acid biosynthetic pathways; Economical production; Lignocellulosic biomass; Mycosporine-like amino acid; Mycosporine-like amino acids; Pentose phosphate pathway; S.cerevisiae; Shinorine; Sustainable production; Yeast strain; biomass; fermentation; genetics; metabolism; Saccharomyces cerevisiae; Lignocellulose | English | Final | 2022 | 10.1021/acs.jafc.2c07218 | 바로가기 | 바로가기 | 바로가기 | |||||||
| ○ | ○ | Article | Development of metal enhanced fluorescent nanomaterials featuring gold nanocubes in proximity to carbon nanodots | In the present study, gold nanocube (AuNC) particles conjugated with a carbon nanodot (CND) layer and spaced with polyethylene glycol (PEG) were prepared to generate a metal-enhanced fluorescence (MEF) effect. This is the first report of MEF from gold nanoparticles in proximity to CNDs. Biocompatible materials (AuNCs, CNDs, and PEGs) were used to fabricate the proposed AuNC-CND complex, thus providing potential utilities of fluorescent materials in various nanobiotechnology fields. Additionally, the use of AuNCs played a critical role in controlling the size and shape of amorphous CNDs exhibiting a soft polymer cluster morphology stemming from bottom-up synthesis. We also attempted to explain the complex interplay between the quenching and enhancing processes through the energy transfer direction between the AuNCs and CNDs based on our experimental results for photoluminescence emission spectra, dark-field microscope imaging, and single-particle scattering measurements in relation to differences in the size of core metals, and the concentration of fluorophores. | Goh, Eunseo; Kim, Geun Wan; Ha, Ji Won; Lee, Young Hoon; Lee, Min Hyung; Lee, Hye Jin | Kyungpook Natl Univ, Dept Chem, 80 Daehakro, Daegu City 41566, South Korea; Kyungpook Natl Univ, Green Nano Mat Res Ctr, 80 Daehakro, Daegu City 41566, South Korea; Univ Ulsan, Dept Chem, 93 Daehak Ro, Ulsan 44610, South Korea | Lee, Min/H-6777-2012; Lee, Young/I-1938-2014; Ha, Ji/AAB-7949-2019; LEE, HYEJIN/W-1345-2018 | 57194014885; 57193609425; 56735319800; 57199024317; 57203782211; 56569175200 | esgoh@knu.ac.kr;hyejinlee@knu.ac.kr; | DYES AND PIGMENTS | DYES PIGMENTS | 0143-7208 | 1873-3743 | 197 | SCIE | CHEMISTRY, APPLIED;ENGINEERING, CHEMICAL;MATERIALS SCIENCE, TEXTILES | 2022 | 4.5 | 9.6 | 0.31 | 2025-06-25 | 3 | 4 | Carbon dots; Gold nanocubes; Au nanocube-Carbon dot conjugates; Metal-enhanced fluorescence; Biocompatibility | DOTS SYNTHESIS; NANOPARTICLES | Au nanocube-Carbon dot conjugates; Biocompatibility; Carbon dots; Gold nanocubes; Metal-enhanced fluorescence | Carbon; Distance; Emission Spectroscopy; Energy Transfer; Fluorescence; Gold Compounds; Materials; Metals; Carbon; Emission spectroscopy; Energy transfer; Fluorescence; Gold compounds; Gold nanoparticles; Nanodots; Particle size analysis; A-carbon; Au nanocube-carbon dot conjugate; Carbon dots; Carbon nanodots; Gold nanocube; Metal enhanced fluorescence; Nanocubes; Potential utility; Biocompatibility | English | 2022 | 2022-01 | 10.1016/j.dyepig.2021.109896 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | Article | Dielectric surface-dependent photogating phenomenon in C8-BTBT leading to broad spectral ultraviolet to near-infrared photoresponse and linearly-weighted synaptic phototransistors | Conventional organic phototransistors (OPTs) studies focus on the development of organic semiconductor layers to improve the photoresponsive characteristics. However, exploring a desirable dielectric surface is also an important factor in determining these photoresponsive characteristics in OPTs. This study investigates the dielectric surface-dependent broadband photoresponsive behaviors of C8-BTBT phototransistors and simulates optoelectrical artificial synapse behavior with SiO2-based OPT. Photogating effect is observed depending on the trap states between C8-BTBT and various dielectric interfaces: CYTOP, PMMA, Al2O3, and SiO2. No photogating effect is observed in the hydrophobic dielectric based OPTs, whereas shifts of turn-on voltage (Vturn-on) toward positive gate bias are observed in the hydrophilic dielectric based OPTs. The Vturn-on of SiO2-based OPTs is shifted by up to 43 V under 400 nm light irradiation, achieving high sensitivity of >1.74 × 104 A∙A−1 and detectivity of >2.40 × 1012 Jones. In the hydrophilic dielectric based OPTs, devices are characterized in ultra-broad optical range from the ultraviolet (UV) to near-infrared (NIR). In addition, optoelectrical artificial synaptic simulation with SiO2-based OPT accomplishes a recognition rate of more than 95%, whereas, despite the same semiconductor, CYTOP-based OPT accomplishes a recognition rate of 0%. © 2022 Elsevier Ltd | Shin, Jihyun; Kim, Somi; Jang, Byung Chul; Yoo, Hocheon | Department of Electronic Engineering, Gachon University, Seongnam, 13120, South Korea; Department of Electronic Engineering, Gachon University, Seongnam, 13120, South Korea; School of Electronic Engineering, Kyungpook National University, Daegu, 41566, South Korea, School of Electronic and Electrical Engineering, Kyungpook National University, Daegu, 41566, South Korea; Department of Electronic Engineering, Gachon University, Seongnam, 13120, South Korea | 57954492100; 57226938800; 9238827900; 56637576900 | hyoo@gachon.ac.kr;bc.jang@knu.ac.kr; | Dyes and Pigments | DYES PIGMENTS | 0143-7208 | 1873-3743 | 208 | SCIE | CHEMISTRY, APPLIED;ENGINEERING, CHEMICAL;MATERIALS SCIENCE, TEXTILES | 2022 | 4.5 | 9.6 | 0.93 | 2025-06-25 | 12 | Fluoropolymer; Interface trap engineering; Photogating effect; Surface energy; Synaptic devices; Ultra-broadband photodetection | Aluminum Oxide; Characteristics; Dielectrics; Silica; Silicon; Surfaces; Ultraviolet Radiation; Water; Wettability; Alumina; Aluminum oxide; Hydrophilicity; Infrared devices; Interface states; Low-k dielectric; Phototransistors; Silicon; Dielectric surface; Interface trap engineering; Interface traps; Near Infrared; Organic phototransistors; Photo detection; Photogating effect; Synaptic device; Ultra-broadband; Ultra-broadband photodetection; Silica | English | Final | 2022 | 10.1016/j.dyepig.2022.110882 | 바로가기 | 바로가기 | 바로가기 | ||||||||
| ○ | ○ | Article | Intracranial non-occlusive intraluminal thrombus may indicate underlying etiology of large vessel occlusion in patients undergoing endovascular therapy | Background The underlying etiology of intracranial non-occlusive intraluminal thrombus (iNOT) remains unknown. This study aimed to investigate whether the presence of iNOT can indicate the underlying etiology of large vessel occlusion (LVO) in patients undergoing endovascular therapy (EVT). Methods Among patients who underwent EVT at three comprehensive stroke centers, we included those with intracranial LVO in the anterior circulation. The presence of iNOT was determined by pretreatment DSA. We investigated the association between iNOT and intracranial atherosclerotic stenosis (ICAS) related LVO. Results Of 546 patients, 44 (8.1%) had iNOT. Patients with iNOT were younger, had less hypertension, atrial fibrillation, and a history of antiplatelet use. In addition, the involvement of the M1 segment of the middle cerebral artery (MCA) was more frequent. However, they had a lower National Institutes of Health Stroke Scale (NIHSS) score on admission and longer onset to recanalization time compared with patients with no iNOT. In a logistic regression model adjusting for age, sex, atrial fibrillation, smoking, prior antiplatelet and anticoagulant use, intravenous tissue plasminogen activator, NIHSS on admission, number of technical trials, intraprocedural re-occlusion, and the location of LVO (p<0.10 in the univariate analysis), the presence of iNOT was significantly associated with ICAS related LVO (adjusted OR 3.04; 95% CI 1.33 to 6.90; p=0.007). Conclusions The presence of iNOT may reflect an underlying ICAS related LVO in patients undergoing EVT. | Jang, Seong Hwa; Park, Hyungjong; Yoo, Joonsang; Hong, Jeong-Ho; Lee, Jin Soo; Lee, Seong-Joon; Kim, Yong-Won; Hong, Ji Man; Choi, Jin Wook; Kang, Dong-Hun; Kim, Yong-Sun; Hwang, Yang-Ha; Sohn, Sung-Il | Keimyung Univ, Dept Neurol, Dongsan Hosp, Daegu, South Korea; Keimyung Univ, Dept Neurol, Sch Med, Daegu, South Korea; Yonsei Univ, Dept Neurol, Coll Med, Yonging Severance Hosp, Yongin, South Korea; Keimyung Univ, Dept Neurol, Coll Med, Daegu, South Korea; Ajou Univ, Dept Neurol, Sch Med, Suwon, South Korea; Ajou Univ, Dept Neurol, Sch Med, Suwon, South Korea; Ajou Univ, Grad Sch Med, Suwon, South Korea; Kyungpook Natl Univ Hosp, Dept Neurol, Daegu, South Korea; Ajou Univ, Dept Radiol, Sch Med, Suwon, South Korea; Kyungpook Natl Univ Hosp, Dept Neuroradiol, Daegu, South Korea; Kyungpook Natl Univ Hosp, Dept Neurol, Daegu, South Korea; Kyungpook Natl Univ Hosp, Cerebrovasc Ctr, Daegu, South Korea | ; Lee, Wang-Soo/AAS-1477-2021; Hong, Ji Man/AAE-2686-2022; HWANG, Yang-Ha/F-3068-2013; Hong, Jeong-Ho/T-8099-2018; Hong, Jeong-Ho/AAE-1002-2022; Park, Hyungjong/AAI-5361-2020 | 57200290928; 57199865406; 55261162200; 55931654800; 55963063300; 57218256679; 56203298200; 55729426200; 55722501000; 8977805800; 57095278300; 7402311308; 36479287000 | hjpark209042@gmail.com;sungil.sohn@gmail.com; | JOURNAL OF NEUROINTERVENTIONAL SURGERY | J NEUROINTERV SURG | 1759-8478 | 1759-8486 | 14 | 10 | SCIE | NEUROIMAGING;SURGERY | 2022 | 4.9 | 9.6 | 0.16 | 2025-06-25 | 3 | 2 | atherosclerosis; stroke; thrombectomy | ACUTE ISCHEMIC-STROKE; CAROTID-ARTERY; DISEASE | Atrial Fibrillation; Endovascular Procedures; Humans; Stroke; Thrombectomy; Tissue Plasminogen Activator; anticoagulant agent; antithrombocytic agent; tissue plasminogen activator; tissue plasminogen activator; adult; age; aged; Article; atrial fibrillation; blood vessel occlusion; cerebral thrombosis; controlled study; disease association; drug use; female; hospital admission; human; hypertension; intracranial atherosclerotic stenosis; intracranial non occlusive intraluminal thrombus; large vessel occlusion; major clinical study; male; medical history; middle cerebral artery; National Institutes of Health Stroke Scale; pathogenesis; patient; recanalization; recurrent disease; sex; smoking; adverse event; atrial fibrillation; cerebrovascular accident; complication; endovascular surgery; thrombectomy | English | 2022 | 2022-10 | 10.1136/neurintsurg-2021-017995 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
페이지 이동: