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○ | ○ | Article | Electrocatalytic activities of electrochemically reduced tubular titania arrays loaded with cobalt ions in flow-through processes | This study examines the electrocatalytic activity of disordered titania nanotube arrays modified with Co2+ for the oxidation of (in)organic substrates and inactivation of E. coli in a flow-through electrochemical device. As-anodized TiO2 nanotubes (TNTs) on perforated Ti foils are electrochemically reduced to create Ti3+ states and oxygen vacancies. The electrochemically reduced TNTs (r-TNTs) are capable of adsorbing Co2+ in similar to 7 times larger amounts than the bare TNTs. Among the bare and modified TNT samples (TNTs, r-TNTs, Co-TNTs, and Co-r-TNTs), Co-r-TNTs exhibit the lowest interfacial charge-transfer resistance and fastest internal charge-transfer kinetics. The electron spin resonance analysis further reveals an enhanced production of OOH radicals in Co-r-TNTs. The combined effect of the excellent charge-transfer behavior and the radical production of Co-r-TNTs leads to faster decomposition of N,N-dimethyl-p-nitrosoaniline, higher current efficiency in the oxidation of iodide to triiodide, and greater inactivation of E. coli as compared to r-TNTs. Details on the surface characterization of the bare and modified TNTs samples are presented and the role of the adsorbed Co2+ is discussed. | Yang, So Young; Park, Jiyeon; Jeong, Hye Won; Park, Hyunwoong | Kyungpook Natl Univ, Sch Energy Engn, Daegu 41566, South Korea | ; Jeong, Hye Won/ABB-1797-2021; Park, Hyunwoong/A-1247-2012 | 54789320800; 57218367393; 55696273000; 7601565583 | hwp@knu.ac.kr; | CHEMICAL ENGINEERING JOURNAL | CHEM ENG J | 1385-8947 | 1873-3212 | 404 | SCIE | ENGINEERING, CHEMICAL;ENGINEERING, ENVIRONMENTAL | 2021 | 16.744 | 2.5 | 0.44 | 2025-07-30 | 11 | 10 | Oxygen vacancy; TiO2 nanotube; Cobalt ions; Electrochemical self-doping; Water treatment | TIO2 NANOTUBE ARRAY; PHOTOELECTROCHEMICAL WATER OXIDATION; DOPED TIO2; ELECTRODES; DEGRADATION; POLLUTANTS; EFFICIENT; HYDROGEN; PHENOL; BIVO4 | Cobalt ions; Electrochemical self-doping; Oxygen vacancy; TiO<sub>2</sub> nanotube; Water treatment | Cobalt; Electrochemical devices; Escherichia coli; Magnetic moments; Nanotubes; Oxide minerals; Titanium dioxide; Current efficiency; Electrocatalytic activity; Interfacial charge transfer resistance; Internal charge transfer; N ,N-dimethyl-p-nitrosoaniline; Radical production; Surface characterization; Titania nanotube arrays; Charge transfer | English | 2021 | 2021-01-15 | 10.1016/j.cej.2020.126410 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
○ | ○ | Article | Electrocatalytic activity of metal-doped SnO2 for the decomposition of aqueous contaminants: Ta-SnO2 vs. Sb-SnO2 | Sb-doped SnO2 (ATO) is one of the most widely used electrocatalyst anodes for the oxidation of water and wastewater. This study synthesizes Ta(V)-doped SnO2 (TTO) electrocatalysts as alternatives to ATO and systematically examines their electrocatalytic activity for the decomposition of organic substrates in various electrolyte solutions. The as-synthesized ITO exhibits the highest activity for the decomposition of phenol, N,N'-dimethyl-4-nitrosoaniline, and rhodamine-B at a Ta doping level of similar to 1%. The optimized TTO exhibits a higher activity for the decomposition of phenol than ATO in a chloride solution and a lower activity than ATO in a sulfate solution. Electron paramagnetic resonance analysis reveals that a relatively larger production of reactive oxygen species is achieved with ATO, whereas a larger production of reactive chlorine species is obtained with TTO. In the durability tests, both electrodes favor an alkaline condition (pH 12.8) over acidic and neutral conditions (pH 1.5 and 6.2, respectively), and Ta-SnO2 is less stable than Sh-SnO2 over the full pH range. Additionally, solid-state and electrochemical surface characterizations are carried out. | Choi, Wonjung; Choi, Jun Hyeok; Park, Hyunwoong | Kyungpook Natl Univ, Sch Energy Engn, Daegu 41566, South Korea | ; Park, Hyunwoong/A-1247-2012 | 56419210400; 57221311984; 7601565583 | hwp@knu.ac.kr; | CHEMICAL ENGINEERING JOURNAL | CHEM ENG J | 1385-8947 | 1873-3212 | 409 | SCIE | ENGINEERING, CHEMICAL;ENGINEERING, ENVIRONMENTAL | 2021 | 16.744 | 2.5 | 1.11 | 2025-07-30 | 20 | 21 | Reactive oxygen species; Reactive chlorine species; Electrocatalyst; Metal oxides; Advanced oxidation process | ELECTROCHEMICAL OXIDATION; MOLECULAR-HYDROGEN; WATER; ELECTRODES; DEGRADATION; REMEDIATION; POLLUTANTS; RADICALS; STRATEGY; PHENOL | Advanced oxidation process; Electrocatalyst; Metal oxides; Reactive chlorine species; Reactive oxygen species | Alkalinity; Antimony compounds; Chlorine compounds; Durability; Electrocatalysts; Electrodes; Electrolytes; Paramagnetic resonance; Phenols; Rhodamine B; Sulfur compounds; Alkaline conditions; Chloride solutions; Electrocatalytic activity; Electrochemical surfaces; Electrolyte solutions; Neutral conditions; Organic substrate; Water and wastewater; Tantalum compounds | English | 2021 | 2021-04-01 | 10.1016/j.cej.2020.128175 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
○ | ○ | Article | Electrocatalytic activity of nanoparticulate TiO2 coated onto Ta-doped IrO2/Ti substrates: Effects of the TiO2 overlayer thickness | The trade-off between short-term efficiency and long-term durability in electrocatalysis has always been a tough choice. This study examines the electrocatalytic activity of double-layered oxide electrodes comprising a similar to 1 mu m-thick Ta-IrO2 underlayer (coated on a Ti plate) and similar to 3.5 mu m- and 5.5 mu m-thick nanoparticulate TiO2 overlayers (TEC-1 and TEC-2, respectively) in NaClO4 and NaCl solutions as non-active and active supporting electrolytes, respectively. The physicochemical features of both TEC samples, including the crystalline pattern, elemental states, morphology, and electrochemically active surface area, are very similar, except for the TiO2 overlayer thickness. The TEC-1 electrode shows similar to 54% lower electrode/electrolyte interfacial charge-transfer resistances than those of TEC-2. In the bulk electrolysis for the decomposition of ammonia, the current density with the TEC1 electrode is two-fold larger than that with TEC-2 under the same potential, due to the relatively low interfacial charge transfer with TEC-1. Electron spin resonance spectroscopic analysis reveals that OH center dot and O-2(center dot-)/HOO center dot are the primary reactive oxygen species responsible for the ammonia decomposition in NaClO4. In the NaCl electrolyte, reactive chlorine species (i.e., free chlorines) decompose ammonia with significantly faster kinetics compared to the case with the reactive oxygen species. Regardless of the electrolyte type, TEC-1 is always more active than TEC-2. However, prolonged bulk electrolysis tests over 300 h show that TEC-2 is more durable than TEC-1, maintaining its electrocatalytic activity and faradaic efficiency. The effect of the TiO2 overlayer thickness on the efficiency and durability of the electrodes is discussed in detail. | Wang, Miao; Kim, Byeong-ju; Han, Dong Suk; Park, Hyunwoong | Kyungpook Natl Univ, Sch Energy Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Architectural Civil Environm & Energy Engn, Daegu 41566, South Korea; Qatar Univ, Ctr Adv Mat CAM, POB 2713, Doha, Qatar; Qatar Univ, Dept Chem Engn, POB 2713, Doha, Qatar | Park, Hyunwoong/A-1247-2012; Han, Dong SuK/AAX-9333-2021 | 57212492803; 57204095284; 36139213900; 7601565583 | hwp@knu.ac.kr; | CHEMICAL ENGINEERING JOURNAL | CHEM ENG J | 1385-8947 | 1873-3212 | 425 | SCIE | ENGINEERING, CHEMICAL;ENGINEERING, ENVIRONMENTAL | 2021 | 16.744 | 2.5 | 0.83 | 2025-07-30 | 19 | 23 | Electrocatalysts; Reactive chlorine species; Reactive oxygen species; Ammonia oxidation; Durability | MODEL ORGANIC SUBSTRATE; ELECTROCHEMICAL OXIDATION; MOLECULAR-HYDROGEN; CHLORINE EVOLUTION; WASTE-WATER; ELECTRODES; DEGRADATION; PHENOL; PERFORMANCE; ELECTROLYSIS | Ammonia oxidation; Durability; Electrocatalysts; Reactive chlorine species; Reactive oxygen species | Charge transfer; Chlorine; Durability; Economic and social effects; Efficiency; Electrocatalysis; Electrocatalysts; Electrodes; Electrolysis; Electrolytes; Iridium compounds; Magnetic moments; Morphology; Oxygen; Sodium chloride; Spectroscopic analysis; Titanium; Titanium dioxide; Ammonia oxidation; Bulk electrolysis; Electrocatalytic activity; Nano particulates; Overlayer thickness; Reactive chlorine species; Reactive oxygen species; Substrate effects; Ti substrates; TiO$-2$; Ammonia | English | 2021 | 2021-12-01 | 10.1016/j.cej.2021.131435 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
○ | ○ | Article | Electrochemical synthesis of binder-free interconnected nanosheets of Mn-doped Co3O4 on Ni foam for high-performance electrochemical energy storage application | In this study, various nanostructures of Mn-doped Co3O4 were synthesized on Ni foam using binder-free electrochemical technology for electrochemical energy storage applications. Using the cyclic voltammetry method with different scan rates, diverse nanostructures, i.e., irregularly oriented nanooctahedra, interconnected standing nanosheets, and nanopetals of Mn-doped Co3O4, were obtained. The standing interconnected nanosheets on the Ni foam exhibited remarkable supercapacitive performance due to the void space between the sheets and mesoporous structure, which provided additional active sites for faradic transitions. The nanosheets exhibited excellent electrochemical performance with a maximum specific capacitance of 1005F g(-1) and a cyclic stability of 88% during 5000 charge-discharge cycles. Moreover, an asymmetric supercapacitor was assembled comprising activated carbon on Ni foam and interconnected nanosheets of Mn-doped Co3O4 on Ni foam as negative and positive electrodes, respectively. This assembled device exhibited an improved potential of 1.6 V, a maximum specific energy of 20.6 Wh kg(-1), and a maximum specific power of 16 kW kg(-1) with 80.6% capacity retention after 2000 charge-discharge cycles, which is superior for SC devices. | Maile, N. C.; Moztahida, Mokrema; Ghani, Ahsan Abdul; Hussain, Muzammil; Tahir, Khurram; Kim, Bolam; Shinde, S. K.; Fulari, V. J.; Lee, Dae Sung | Kyungpook Natl Univ, Dept Environm Engn, 80 Daehak Ro, Daegu 41566, South Korea; Dongguk Univ, Dept Biol & Environm Sci, Coll Life Sci & Biotechnol, 32 Dongguk Ro,Biomed Campus, Goyang Si 10326, Gyeonggi Do, South Korea; Shivaji Univ, Dept Phys, Holog & Mat Res Lab, Kolhapur 416004, MS, India | ; Tahir, Khurram/KFS-5321-2024; Fulari, Akash Vijay/JLL-8094-2023; Maile, Nagesh/AFD-8838-2022 | 57193804539; 57202904382; 57218294089; 58279975000; 57207114377; 57208922438; 55776351000; 7801667005; 55568524907 | daesung@knu.ac.kr; | CHEMICAL ENGINEERING JOURNAL | CHEM ENG J | 1385-8947 | 1873-3212 | 421 | SCIE | ENGINEERING, CHEMICAL;ENGINEERING, ENVIRONMENTAL | 2021 | 16.744 | 2.5 | 1.67 | 2025-07-30 | 34 | 34 | Mn-doped Co3O4; Potentiodynamic deposition; Nanosheet; Supercapacitor; Electrochemical energy storage | FACILE SYNTHESIS; SUPERCAPACITIVE PERFORMANCE; ADVANCED ELECTRODE; ACTIVATED CARBON; POROUS MNCO2O4; NICKEL FOAM; EFFICIENT; OXIDATION; NANOCUBES; OXIDE | Electrochemical energy storage; Mn-doped Co<sub>3</sub>O<sub>4</sub>; Nanosheet; Potentiodynamic deposition; Supercapacitor | Activated carbon; Binders; Cyclic voltammetry; Electric discharges; Energy storage; Foams; Manganese compounds; Nanosheets; Nickel; Binder free; Charge-discharge cycle; Co$-3$/O$-4$; Electrochemical energy storage; Energy storage applications; Mn-doped; Mn-doped co3O4; Ni foam; Performance; Potentiodynamic deposition; Supercapacitor | English | 2021 | 2021-10-01 | 10.1016/j.cej.2021.129767 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
○ | ○ | Article | Electronic structure modulation of nickel hydroxide and tungsten nanoparticles for fast structure transformation and enhanced oxygen evolution reaction activity | The 3d transition metal-based catalysts have emerged as prospective electrocatalysts for the oxygen evolution reaction (OER) owing to the wide availability of transition metals in the Earth's crust, as well as the low cost and long lifetime of the catalysts. However, their moderate activity for the OER is a challenge for commercial applications. In this study, a hetemstructure (W@Ni(OH)(2)/CC) composed of Ni(OH) 2 nanosheets and tungsten nanoparticles was successfully synthesized on a conductive carbon cloth to overcome the problem of deficient catalytic activity. The constructed heterointerface and the two-dimensional (2D) nanosheet morphology of the catalyst can accelerate the charge transfer, OER kinetics, and the ion/gas transport. In addition, interfacial electronic structure optimization was investigated to facilitate the formation of oxyhydroxide intermediates on the catalyst surface, which enhances the overall OER performance. This paper provides a thorough explanation on the role of modified electronic configuration in the heterostructures and proposes a new path to synthesize these heterostructures. | Kang, Taeoh; Kim, Kwanwoo; Kim, Myeongjin; Kim, Jooheon | Chung Ang Univ, Sch Chem Engn & Mat Sci, 84 Heukseok Ro, Seoul, South Korea; Kyungpook Natl Univ, Dept Hydrogen & Renewable Energy, 80 Daehakro, Daegu 41566, South Korea; Chung Ang Univ, Dept Intelligent Energy & Ind, 84 Heukseok Ro, Seoul, South Korea | 57216830770; 57205454165; 55541419000; 13103271400 | myeongjinkim@knu.ac.kr;jooheonkim@cau.ac.kr; | CHEMICAL ENGINEERING JOURNAL | CHEM ENG J | 1385-8947 | 1873-3212 | 418 | SCIE | ENGINEERING, CHEMICAL;ENGINEERING, ENVIRONMENTAL | 2021 | 16.744 | 2.5 | 1.33 | 2025-07-30 | 18 | 25 | Metallic tungsten; Heterostructure; Electronic coupling effect; Oxygen evolution reaction | ELECTROCHEMICAL OXIDATION; EFFICIENT; ELECTROCATALYSTS; HYDROGEN; NIOOH; OXIDE; NI | Electronic coupling effect; Heterostructure; Metallic tungsten; Oxygen evolution reaction | Catalyst activity; Charge transfer; Electrocatalysts; Electronic structure; Hydrogen production; Morphology; Nanoparticles; Nanosheets; Nickel compounds; Oxygen; Oxygen evolution reaction; Structural optimization; Synthesis (chemical); Tungsten; Electronic coupling effect; Electronic.structure; Evolution reactions; Metallic tungsten; Nickel hydroxides; Nickel-tungsten; OH$+-$; Oxygen evolution; Structure modulation; ]+ catalyst; Heterojunctions | English | 2021 | 2021-08-15 | 10.1016/j.cej.2021.129403 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
○ | ○ | Article | Enhanced adsorption performance for selected pharmaceutical compounds by sonicated Ti3C2TX MXene | This paper is aimed at evaluating the feasibility of selected pharmaceutical compounds' adsorption on Ti3C2TX MXene (termed 'MXene' in this study) as the first attempt. For adsorption mechanism analysis, amitriptyline (AMT), verapamil, carbamazepine, 17 alpha-ethinyl estradiol, ibuprofen, and diclofenac were the selected pharmaceutical compounds and experiments were conducted in three different pH conditions (3.5, 7, and 10.5). Due to electrostatic attraction between negatively charged MXene and positively charged AMT, the adsorption capacity for AMT showed the highest value (58.7 mg/g) at pH 7. In addition, for enhanced adsorption performance, MXene sonicated at different frequencies (0, 28, and 580 kHz) was applied for AMT adsorption. The maximum adsorption capacity was observed in the following order: 28 kHz (214 mg/g) > 580 kHz (172 mg/g) > 0 kHz (138 mg/g). This is because cavitation bubbles by sonication can make well-dispersed MXene and more forming oxygenated functional groups on MXene. In particular, by generating larger cavitation bubbles, the highest performance was shown at lower frequencies. Furthermore, because there are a lot of ions in real aquatic environments, the effect of various ions on adsorption performance on pharmaceutical compounds was evaluated using sonicated MXene. Although background inorganics negatively affect adsorption performance, natural organic matter as background organics increased the adsorption performance. However, cetylpyridinium chloride (CPC), a major cationic surfactant of the pharmaceutical industry, had a negative effect on adsorption performance by exhibiting a competition effect between CPC and pharmaceutical compounds. Finally, a comparison between sonicated MXene and commercial powdered activated carbon and recyclability performances indicated that sonicated MXene could be an alternative adsorbent for pharmaceutical compounds removal due to its high adsorption capacity, selectivity, and reusability. | Kim, Sewoon; Gholamirad, Farivash; Yu, Miao; Park, Chang Min; Jang, Am; Jang, Min; Taheri-Qazvini, Nadar; Yoon, Yeomin | Univ South Carolina, Dept Civil & Environm Engn, 300 Main St, Columbia, SC 29208 USA; Univ South Carolina, Dept Chem Engn, Columbia, SC 29208 USA; Rensselaer Polytech Inst, Dept Chem & Biol Engn, Troy, NY 12180 USA; Kyungpook Natl Univ, Dept Environm Engn, 80 Daehak Ro, Daegu 41566, South Korea; Sungkyunkwan Univ, Sch Civil & Architecture Engn, 2066 Seobu Ro,Jangan 16 Gu, Suwon 16419, Gyeonggi Do, South Korea; Kwangwoon Univ, Dept Environm Engn, 447-1 Wolgye Dong Nowon Gu, Seoul 01897, South Korea; Univ South Carolina, Biomed Engn Program, Columbia, SC 29208 USA | ; Park, Chang Min/CAA-8506-2022; Jang, Min/J-2230-2012; Yoon, Yeomin/KDP-2253-2024; Gholamirad, Farivash/AFL-0546-2022; Jang, Min/M-6690-2018 | 57201422323; 57218710079; 35410925300; 57209588953; 7004582729; 36762550700; 36609373800; 7402126688 | yoony@cec.sc.edu; | CHEMICAL ENGINEERING JOURNAL | CHEM ENG J | 1385-8947 | 1873-3212 | 406 | SCIE | ENGINEERING, CHEMICAL;ENGINEERING, ENVIRONMENTAL | 2021 | 16.744 | 2.5 | 7.33 | 2025-07-30 | 138 | 156 | Ti3C2TX MXene; Pharmaceuticals; Sonication; Adsorption; Water treatment | ENDOCRINE DISRUPTING COMPOUNDS; PERSONAL CARE PRODUCTS; WASTE-WATER; EMERGING CONTAMINANTS; TITANIUM CARBIDE; DRINKING-WATER; REMOVAL; DESORPTION; PPCPS; SULFAMETHOXAZOLE | Adsorption; Pharmaceuticals; Sonication; Ti<sub>3</sub>C<sub>2</sub>T<sub>X</sub> MXene; Water treatment | Activated carbon; Amides; Cationic surfactants; Cavitation; Chlorine compounds; Competition; Drug products; Reusability; Adsorption performance; Cetylpyridinium Chloride; Electrostatic attractions; High adsorption capacity; Natural organic matters; Pharmaceutical compounds; Pharmaceutical industry; Powdered activated carbon; Adsorption | English | 2021 | 2021-02-15 | 10.1016/j.cej.2020.126789 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
○ | ○ | Article | Enhanced methane storage in clathrate hydrates induced by antifreezes | Antifreezes are widely used in preventing hydrate formation in oil and gas flowlines. Recent studies have revealed that methanol and ammonia can be incorporated into clathrate hydrate phases along with a more hydrophobic guest such as THF or propane and that these antifreezes act as catalysts for methane hydrate formation from ice. In this work, we demonstrated that these antifreezes can enhance the methane storage content of binary clathrate hydrates, namely those of THF and TBAB. THF + methane and TBAB + methane binary hydrates with/without methanol or ammonia were synthesized and analyzed with 13C NMR spectroscopy and Xray diffraction (XRD) methods. In the THF hydrate system, 84% and 81% of the 512 small cages were occupied by methane in the presence of methanol and ammonia respectively, while only 44% of the small cages were occupied in the absence of these antifreezes. In the TBAB-H2O system, the powder XRD (PXRD) patterns of 1TBAB:38H2O samples without antifreeze both before and after methane introduction showed mostly tetragonal structures. On the other hand, it was confirmed that methanol can easily induce TBAB hydrates to form the orthorhombic structure which is more suitable for methane storage than the tetragonal structures of TBAB hydrates. The single crystal XRD analysis of a crystal grown from the 1TBAB:1CH3OH:38H2O solution at 277 K showed that methanol was present in the 512 cage of the orthorhombic TBAB hydrate phase. The 13C NMR spectra of TBAB + methane hydrates also showed an enhanced methane content in the presence of methanol. The present findings on the enhancement of methane storage induced by antifreezes suggest that methanol can be a key material for hydrate-based methane storage systems. | Lee, Byeonggwan; Shin, Kyuchul; Muromachi, Sanehiro; Moudrakovski, Igor L.; Ratcliffe, Christopher I.; Ripmeester, John A. | Kyungpook Natl Univ, Dept Hydrogen & Renewable Energy, 80 Daehak Ro, Daegu 41566, South Korea; Korea Atom Energy Res Inst, Radioact Waste Treatment Res Team, 111 Daedeok Daero 989, Daejeon 34057, South Korea; Kyungpook Natl Univ, Dept Appl Chem, 80 Daehak Ro, Daegu 41566, South Korea; Natl Inst Adv Ind Sci & Technol, Energy Proc Res Inst EPRI, 16 1 Onogawa, Tsukuba, Ibaraki 2058569, Japan; Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany; Natl Res Council Canada, 100 Sussex Dr, Ottawa, ON K1A 0R6, Canada | Ripmeester, John/G-1950-2011; Lee, Byeonggwan/HPD-2363-2023; Muromachi, Sanehiro/L-6203-2018 | 57201269846; 14030501800; 24481936000; 7004239422; 7005946708; 7102709932 | kyuchul.shin@knu.ac.kr;ripmeesterjohn5@gmail.com; | CHEMICAL ENGINEERING JOURNAL | CHEM ENG J | 1385-8947 | 1873-3212 | 418 | SCIE | ENGINEERING, CHEMICAL;ENGINEERING, ENVIRONMENTAL | 2021 | 16.744 | 2.5 | 1.67 | 2025-07-30 | 33 | 37 | Clathrate; Hydrate; Antifreeze; Methane; Gas Storage | BROMIDE SEMICLATHRATE HYDRATE; DENSITY-FUNCTIONAL THEORY; TETRA-N-BUTYL; CARBON-DIOXIDE; GAS; CO2; SEPARATION; CRYSTAL; CAPTURE; TETRABUTYLAMMONIUM | Antifreeze; Clathrate; Gas Storage; Hydrate; Methane | Ammonia; Gas hydrates; Hydration; Methanol; Nuclear magnetic resonance spectroscopy; Single crystals; Storage (materials); X ray diffraction; $+13$/C NMR; Antifreeze; Clathrate hydrate; Clathrates; Gas storage; Hydrate; Hydrate formation; Hydrate phase; Methane hydrates; Methane storage; Methane | English | 2021 | 2021-08-15 | 10.1016/j.cej.2021.129304 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
○ | ○ | Article | Enhancement of bonding strength in BiTe-based thermoelectric modules by electroless nickel, electroless palladium, and immersion gold surface modification | In this study, an electroless nickel (EN), electmless palladium (EP), and immersion gold (IG) (ENEPIG) multilayer coat was developed for application on BiTe-based thermoelectric materials to increase the bonding strength between BiTe-based materials and Cu electrodes in thermoelectric modules. The ENEPIG-plated thermoelectric module exhibited a bonding strength of over 11 MPa, which was approximately 40% higher than those of conventional EN-plated modules. According to the interfacial analysis of the bonding areas via a field emission electron probe micro analyzer (FE-EPMA), the Ni layers in ENEPIG and EN acted as diffusion barriers to inhibit the formation of brittle Sn-Te intermetallic compounds (IMCs). Sn-Cu-Pd and Sn-Cu IMCs were formed below the Ni-plated area at the bonding interface of the ENEPIG and EN-plated modules, respectively. However, Sn-Cu-Pd IMCs in the ENEPIG interface exhibited thicker and more homogeneous IMC layers after heat treatment compared to the Sn-Cu IMCs in the conventional EN interface. The wettability of the ENEPIG-plated BiTe surface was significantly greater than that of the EN-plated surface. This directly induced fewer and smaller pores on the bonding interface of the BiTe-based materials with ENEPIG plating compared to those with EN plating, thereby resulting in the higher bonding strength of ENEPIG-plated modules. | Nguyen, Yen Ngoc; Kim, Subin; Bae, Sung Hwa; Son, Injoon | Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea; Kyushu Univ, Grad Sch Engn, Dept Mat Proc Engn, Fukuoka 8190395, Japan | ; Nguyen, Yen/CAJ-4943-2022 | 57197767959; 57221554860; 57210171283; 9942975800 | ijson@knu.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 545 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2021 | 7.392 | 2.5 | 1.23 | 2025-07-30 | 20 | 20 | ENEPIG; Diffusion barrier; Bonding strength; BiTe alloy; Thermoelectric modules | BiTe alloy; Bonding strength; Diffusion barrier; ENEPIG; Thermoelectric modules | After-heat treatment; Diffusion barriers; Palladium; Palladium alloys; Strength of materials; Tellurium compounds; Thermoelectricity; Tin compounds; Bonding interfaces; Bonding strength; Cu electrode; Electroless nickel; Gold surfaces; Interfacial analysis; Thermo-Electric materials; Thermo-electric modules; Bismuth compounds | English | 2021 | 2021-04-15 | 10.1016/j.apsusc.2021.149005 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
○ | ○ | Article | Exploring the intrinsic active sites and multi oxygen evolution reaction step via unique hollow structures of nitrogen and sulfur co-doped amorphous cobalt and nickel oxides | The unique designed and their tunable intrinsic active sites for OER have a key role in alternating the noble metal (IrO2). Herein, we fabricated Co-Ni-N-S nanocage through a simple self-catalytic process. The outstanding OER performance is based on the rich defect sites and oxygen vacancies in the amorphous phase with abundant surface area attributed to the hollow nanocage structure, and the 'ensemble effect' caused by N and S doping. The high intrinsic active surface area of Co-Ni-N-S-O was confirmed by double-layer capacitance (C-dl : 5.39 mF/cm(2)), and the 'ensemble effect' was determined through XPS and XAS analysis. The metal centers were located to a higher oxidation state, resulting the advantageous for the formation of OER intermediates (*OOH), as proved by operando XAS analysis. The Co-Ni-N-S-O catalyst provides a valuable strategy to design electrocatalysts of high efficiency and expand the applications of catalysts based on amorphous metal oxides. | Kim, Kwanwoo; Kang, Taeoh; Kim, Myeongjin; Kim, Jooheon | Chung Ang Univ, Sch Chem Engn & Mat Sci, 84 Heukseok Ro, Seoul, South Korea; Kyungpook Natl Univ, Dept Hydrogen & Renewable Energy, 80 Daehakro, Daegu 41566, South Korea; Chung Ang Univ, Dept Intelligent Energy & Ind, 84 Heukseok Ro, Seoul, South Korea | 57205454165; 57216830770; 55541419000; 13103271400 | myeongjinkim@knu.ac.kr;jooheonkim@cau.ac.kr; | CHEMICAL ENGINEERING JOURNAL | CHEM ENG J | 1385-8947 | 1873-3212 | 426 | SCIE | ENGINEERING, CHEMICAL;ENGINEERING, ENVIRONMENTAL | 2021 | 16.744 | 2.5 | 1.11 | 2025-07-30 | 24 | 23 | Hollow structure; Amorphous cobalt- and nickel- oxides; Ensemble effect; In-situ X-ray absorption spectroscopy; Oxygen evolution reaction | EFFICIENT ELECTROCATALYST; REDUCTION; SULFIDE; CATALYSIS; NANOCAGES; IRON; FE | Amorphous cobalt- and nickel- oxides; Ensemble effect; Hollow structure; In-situ X-ray absorption spectroscopy; Oxygen evolution reaction | Cobalt compounds; Electrocatalysts; Nitrogen; Oxygen vacancies; Precious metals; Reaction intermediates; X ray absorption spectroscopy; Active site; Amorphous cobalt- and nickel- oxide; Ensemble effect; Evolution reactions; Hollow structure; In-situ X-ray absorption spectroscopy; Nanocages; Oxygen evolution; Reaction steps; ]+ catalyst; Nickel oxide | English | 2021 | 2021-12-15 | 10.1016/j.cej.2021.130820 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
○ | ○ | Article | Extremely bias stress stable enhancement mode sol-gel-processed SnO2 thin-film transistors with Y2O3 passivation layers | Herein, a new combination of high-performance and bias-stress-stable SnO2 thin-film transistors (TFTs) with Y2O3 passivation layers is introduced. The Y2O3 layers on SnO2 semiconductors function suitably as passivation layers to minimize H2O adsorption and to avoid free carrier trapping by creating physical gaps that are larger than the characteristic diffusion length. Yttrium is observed to partially diffuse into SnO2, suppressing the formation of oxygen vacancies in the SnO2 semiconductor because of its low electronegativity and standard electrode potential. The SnO2 TFTs with Y2O3 passivation layers exhibit a mobility of 5.7 +/- 0.3 cm(2)/Vs, subthreshold swing of 1.1 +/- 0.2 V/decade, threshold voltage (V-TH) of + 6.8 +/- 0.4 V, and on/off current ratio of 6.1 (+/- 0.3) x 10(7). The fabricated sol-gel-processed SnO2 TFTs with Y2O3 passivation layers revealed remarkable negative and positive bias stress stabilities without hysteresis and consistently delivered high performance with enhancement mode operations. Owing to this high performance, the SnO2/Y2O3 combination reported herein has potential as a commercial-product-level TFT for next-generation displays. | Lee, Changmin; Lee, Won-Yong; Kim, Do Won; Kim, Hyeon Joong; Bae, Jin-Hyuk; Kang, In-Man; Lim, Doohyeok; Kim, Kwangeun; Jang, Jaewon | Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea; Kyonggi Univ, Dept Elect Engn, Suwon 16227, South Korea; Korea Aerosp Univ, Sch Elect & Informat Engn, Goyang 10540, South Korea | Kim, Byung Joo/ABG-7715-2021 | 57191709616; 57209527128; 59110033500; 57221742722; 35326180700; 7203062678; 56780918100; 36004977500; 57194107504 | j1jang@knu.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 559 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2021 | 7.392 | 2.5 | 1.68 | 2025-07-30 | 26 | 26 | Sol-gel; SnO2; Negative Bias Stree; Positive Bias Stress; Y2O3; Thin film transistors | OXIDE; STABILITY; AMBIENT | Negative Bias Stree; Positive Bias Stress; SnO<sub>2</sub>; Sol-gel; Thin film transistors; Y<sub>2</sub>O<sub>3</sub> | Chemical bonds; Electronegativity; Passivation; Semiconducting tin compounds; Sol-gel process; Thin film circuits; Thin films; Threshold voltage; Bias stress; Free carriers; Negative bias stree; Passivation layer; Performance; Positive bias stress; SnO$-2$; Sol'gel; Thin-film transistors; Y$-2$/O$-3$; Thin film transistors | English | 2021 | 2021-09-01 | 10.1016/j.apsusc.2021.149971 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
○ | ○ | Article | Fe3O4 nano assembly embedded in 2D-crumpled porous carbon sheets for high energy density supercapacitor | Due to the copious development of industries and depletion of fossil fuels generate deteriorating environmental pollution and appalling economic crisis. Thus, there are increasing unmet for developing well-defined nanostructures to mitigate energy and environmental issues. Herein, we firstly report a unique concerted method to convert agm bio-waste into an economical wealth material. By the inspiration of nature, we selected a waste 2D garlic husk (Allium sativum) as a torchbearer to make a unique material. The garlic extract was applied for the synthesis of Fe3O4 NAs@2D-CCS composite nano-assemblies (NAs). Interestingly, the small-sized Fe3O4 nanocrystals (<20 nm) underwent nucleation in the presence of biogenic 2D-CCS and formed a pomegranate like a cluster (200 nm) forming a conglomerate on porous carbon layers. Most importantly, no secondary waste was generated in this work. This Fe3O4 NAs@2D-CCS composite affords high specific capacitance of 820F g(-1) at a current density of 0.5 A g(-1), which is nearly 5 to 3 times higher than pristine Fe(3)O(4 )NPs (<20 nm) electrode with an outstanding power density (3500-8000 W kg(-1)) and specific energy density (115.5 to 65.9 Wh Kg(-1)), which is superior among most of all reported iron oxide and graphitic carbon composites. This simple work stimulates a new door for the generation of waste to well-defined nanostructure materials for energy, catalysis, and environmental applications. | Venkateswarlu, Sada; Mahajan, Hansa; Panda, Atanu; Lee, Jihyun; Govindaraju, Saravanan; Yun, Kyusik; Yoon, Minyoung | Kyungpook Natl Univ, Dept Chem, Daegu 41566, South Korea; Kyungpook Natl Univ, Green Nano Mat Res Ctr, Daegu 41566, South Korea; Gachon Univ, Dept Nanochem, Sungnam 13120, South Korea; Gachon Univ, Dept Bionanotechnol, Sungnam 13120, South Korea | ; Panda, Dr. Atanu/AAU-7780-2020; Panda, Atanu/AAU-7780-2020; venkateswarlu, sada/P-2034-2018 | 55649254900; 57202075318; 57201632042; 57211144130; 57190229119; 35331093900; 25222186500 | venkisada67@gmail.com;myyoon@knu.ac.kr; | CHEMICAL ENGINEERING JOURNAL | CHEM ENG J | 1385-8947 | 1873-3212 | 420 | SCIE | ENGINEERING, CHEMICAL;ENGINEERING, ENVIRONMENTAL | 2021 | 16.744 | 2.5 | 2.55 | 2025-07-30 | 50 | 53 | Garlic husk; 2D-crumpled porous carbon; Fe3O4; Fe3O4 NAs@2D-CCS; Supercapacitor | HIGH-PERFORMANCE; ELECTRODE-MATERIALS; GRAPHENE; NANOPARTICLES; COMPOSITE; STORAGE; OXIDE; NANOCOMPOSITES; TRANSFORMATION; CAPACITANCE | 2D-crumpled porous carbon; Fe<sub>3</sub>O<sub>4</sub>; Fe<sub>3</sub>O<sub>4</sub> NAs@2D-CCS; Garlic husk; Supercapacitor | Carbon capture; Carbon carbon composites; Fossil fuels; Magnetite; Nanostructures; Porous materials; Supercapacitor; Environmental applications; Environmental issues; Environmental pollutions; High energy densities; High specific capacitances; Nanostructure material; Porous carbon layer; Specific energy density; Iron oxides | English | 2021 | 2021-09-15 | 10.1016/j.cej.2020.127584 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
○ | ○ | Article | Fluorine-based plasma treatment for hetero-epitaxial β-Ga2O3 MOSFETs | In this work, we demonstrate the lateral metal-oxidesemiconductor field-effect transistors (MOSFETs) with beta-Ga2O3 film (thickness = 150 nm) grown on a c-plane sapphire substrate by a hydride vapor phase epitaxy (HVPE) method using a CF4-based plasma treatment. By incorporating fluorine (F) the electrical characteristics of the surface and bulk regions of the resistive beta-Ga2O3 film could be significantly improved. The analyses by secondary ion mass spectrometry and x-ray photoemission spectroscopy confirmed the formation of the substitutional fluorine, F-O, with its peak concentration of 2.3 x 10(18) cm(-3) at 5 similar to 10 nm deep from the surface and about 10(15) similar to 10(16) cm(-3) in the bulk region. While the argon-plasma treatment was insufficient for making a Ti/Au/Ti metal contact ohmic, the same contact formed on the CF4-treated surface showed an ohmic behavior with specific resistivity of 2.0 x 10(-3) Omega.cm(2) and contact resistance of 0.8 Omega.m without any post thermal annealing. With the improvement of the electrical properties in both the surface and bulk regions, the HVEP-grown heteroepitaxial beta-Ga2O3 MOSFET exhibited the field-effect mobility of up to 5.3 cm(2)/V.s and on/off ratio of 10(6). | Jeong, Yeong Je; Yang, Jeong Yong; Lee, Chan Ho; Park, Ryubin; Lee, Gyeongryul; Chung, Roy Byung Kyu; Yoo, Geonwook | Soongsil Univ, Sch Elect Engn, Seoul 06938, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea | Yoo, Geonwook/AEC-6673-2022; Yang, Jeong Yong/AGR-9699-2022 | 57668555400; 57216440553; 55598571200; 57223217758; 57192425717; 16642183100; 56950197800 | roy.b.chung@knu.ac.kr;gwyoo@ssu.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 558 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2021 | 7.392 | 2.5 | 1.61 | 2025-07-30 | 34 | 33 | beta-Ga2O3 MOFETs; CF4 plasma treatment; Ohmic contacts; Fluorine doping | POWER; GROWTH; TRANSISTORS; FILMS; OXIDE | CF<sub>4</sub> plasma treatment; Fluorine doping; Ohmic contacts; β-Ga<sub>2</sub>O<sub>3</sub> MOFETs | Electric contactors; Fluorine; Gallium compounds; MOSFET devices; Photoelectron spectroscopy; Plasma applications; Sapphire; Secondary ion mass spectrometry; Semiconductor doping; C-plane sapphire substrates; CF$-4$; CF4 plasma treatment; Electrical characteristic; Field-effect transistor; Film-thickness; Fluorine doping; Hydride vapor phase epitaxy; Plasma treatment; Β-ga2O3 MOFET; Ohmic contacts | English | 2021 | 2021-08-30 | 10.1016/j.apsusc.2021.149936 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
○ | ○ | Article | Highly-configured TiO2 hollow spheres adorned with N-doped carbon dots as a high-performance photocatalyst for solar-induced CO2 reduction to methane | Transforming CO2 into solar fuel using renewable solar energy and a catalyst is an effective approach that simultaneously addresses energy scarcity and climate deterioration. Therefore, it is necessary, albeit challenging, to design a catalyst that works effectively for this purpose. Herein, we have rationally developed a hybrid catalyst composed of highly-configured TiO2 hollow spheres (TOH) and N-doped carbon dots (CD), referred to as CD/TOH, and use this hybrid as a catalyst for photocatalytic CO2 reduction to produce CH4 under simulated sunlight. The electron microscopy results revealed that the CD/TOH hybrid possesses a porous hollow sphere structure uniformly adorned with N-doped carbon dots. Moreover, the CD/TOH hybrid demonstrates many beneficial properties for CO2 photoreduction reactions, including a large surface area, effective light-harvesting capability, high CO2 adsorption, and, most importantly, significantly enhanced separation of photoexcited charges. Consequently, the CD/TOH containing 2 wt% CD achieves an optimum CH4 formation rate of 26.8 mu mol h(-1) g(-1), corresponding to 98% CH4 selectivity against competitive H-2 production. Further, the hybrid also demonstrated stable CO2 reduction activity during consecutive test runs. Thus, the insights gained from this study may aid in the development of effective catalysts for CO2 photoreduction. | Lee, Dong-Eun; Kim, Dong Jin; Moru, Satyanarayana; Kim, Mi Gyeong; 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; MORU, SATYANARAYANA/AAF-3189-2021; Moru, Satyanarayana/AAF-3189-2021; Tonda, Surendar/AAO-3358-2020 | 56605563300; 57201652080; 58562229700; 57192680180; 7103322277; 56114866900 | wkjo@knu.ac.kr;surendart@knu.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 563 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2021 | 7.392 | 2.5 | 2.05 | 2025-07-30 | 31 | 31 | TiO2 hollow sphere; Carbon dot; Hybrid heterojunction; CO2 photoreduction; Solar energy conversion | FACILE SYNTHESIS; QUANTUM DOTS; EFFICIENT; HYBRID; NITRIDE; HETEROJUNCTION; CONVERSION; SURFACE; H2O; CH4 | Carbon dot; CO<sub>2</sub> photoreduction; Hybrid heterojunction; Solar energy conversion; TiO<sub>2</sub> hollow sphere | Carbon dioxide; Catalysts; Deterioration; Doping (additives); Energy conversion; Heterojunctions; Hydrogen production; Solar energy; Spheres; Titanium dioxide; Carbon dots; CO2 photoreduction; Doped carbons; Hollow sphere; Hybrid heterojunction; N-doped; Solar energy conversions; TiO$-2$; TiO2 hollow sphere; ]+ catalyst; Carbon | English | 2021 | 2021-10-15 | 10.1016/j.apsusc.2021.150292 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
○ | ○ | Article | Histone sumoylation and chromatin dynamics | Chromatin structure and gene expression are dynamically controlled by post-translational modifications (PTMs) on histone proteins, including ubiquitylation, methylation, acetylation and small ubiquitinlike modifier (SUMO) conjugation. It was initially thought that histone sumoylation exclusively suppressed gene transcription, but recent advances in proteomics and genomics have uncovered its diverse functions in cotranscriptional processes, including chromatin remodeling, transcript elongation, and blocking cryptic initiation. Histone sumoylation is integral to complex signaling codes that prime additional histone PTMs as well as modifications of the RNA polymerase II carboxy-terminal domain (RNAPII-CTD) during transcription. In addition, sumoylation of histone variants is critical for the DNA double-strand break (DSB) response and for chromosome segregation during mitosis. This review describes recent findings on histone sumoylation and its coordination with other histone and RNAPII-CTD modifications in the regulation of chromatin dynamics. | Ryu, Hong-Yeoul; Hochstrasser, Mark | Kyungpook Natl Univ, Coll Natl Sci, Sch Life Sci, BK21 FOUR KNU Creat BioRes Grp, Daegu 41566, South Korea; Yale Univ, Dept Mol Biophys & Biochem, New Haven, CT 06520 USA | 55889917800; 26643419800 | rhr4757@knu.ac.kr;mark.hochstrasser@yale.edu; | NUCLEIC ACIDS RESEARCH | NUCLEIC ACIDS RES | 0305-1048 | 1362-4962 | 49 | 11 | SCIE | BIOCHEMISTRY & MOLECULAR BIOLOGY | 2021 | 19.16 | 2.5 | 2.84 | 2025-07-30 | 96 | 100 | RNA-POLYMERASE-II; CENTROMERE PROTEIN-A; H3 VARIANT CSE4; H2B UBIQUITYLATION; SACCHAROMYCES-CEREVISIAE; DEACETYLASE COMPLEX; REMODELING COMPLEX; MASS-SPECTROMETRY; TRANSCRIPTION; RSC | Centromere; Chromatin; DNA Repair; Gene Expression Regulation; Histone Code; Histones; Sumoylation; Transcription, Genetic; histone; RNA polymerase II; histone; centromere; chromatin; chromatin dynamics; chromatin structure; double strand break repair; gene expression regulation; gene overexpression; genetic transcription; genome; histone acetylation; histone methylation; histone modification; histone sumoylation; histone ubiquitination; human; nonhuman; protein degradation; protein domain; protein processing; Review; transcription regulation; transcription repression; chemistry; chromatin; DNA repair; histone code; metabolism; sumoylation | English | 2021 | 2021-06-21 | 10.1093/nar/gkab280 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
○ | ○ | Article | Improved contact resistance and solderability of electrodeposited Au-Sn alloy layer with high thermal stability for electronic contacts | We investigated the effect of thermal aging on the contact resistance and solderability of Au-Sn and Au-Co alloy films. The Au-Sn alloy exhibited lower contact resistance and better solderability compared to the conventional Au-Co alloy. In the Au-Sn alloy, an Au-Sn-Ni intermetallic compound layer was formed at the interface between the electroplated Ni and Au-Sn layers during the thermal aging process. The resulting Au-Sn-Ni layer effectively blocked the diffusion of underlying nickel to the surface, leading to improved solderability and enhanced thermal stability of the contact resistance. Meanwhile, the results revealed that a significant amount of nickel diffused to the surface of the Au-Co alloy during the thermal treatment, and the nickel atoms on the surface were oxidized to NiO or Ni2O3, which increased the contact resistance and deteriorated solderability by acting as a barrier layer. | Park, Jaewang; Bae, Sung Hwa; Son, Injoon | Kyungpook Natl Univ, Sch Mat Sci & Engn, 80 Daehakro, Daegu 41566, South Korea; Kyushu Univ, Grad Sch Engn, Dept Mat Proc Engn, Fukuoka 8190395, Japan | 59875352300; 57210171283; 9942975800 | qkrwodhkd@nate.com;bae.seonghwa.233@s.kyushu-u.ac.jp;ijson@knu.ac.kr; | APPLIED SURFACE SCIENCE | APPL SURF SCI | 0169-4332 | 1873-5584 | 551 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2021 | 7.392 | 2.5 | 0.37 | 2025-07-30 | 8 | 8 | Au-Sn alloy; Au-Co alloy; Contact resistance; Solderability; Thermal aging; Electroplating | COPPER DIFFUSION; GOLD; OXIDATION; NICKEL; METAL; NI | Au-Co alloy; Au-Sn alloy; Contact resistance; Electroplating; Solderability; Thermal aging | Binary alloys; Cobalt alloys; Contact resistance; Lead-free solders; Nickel oxide; Thermal aging; Thermodynamic stability; Tin alloys; Au-Sn alloy; Barrier layers; Co alloys; Electroplated Ni; High thermal stability; Intermetallic compound layer; Nickel atoms; Solderability; Gold alloys | English | 2021 | 2021-06-15 | 10.1016/j.apsusc.2021.149405 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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