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| 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 |
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| ○ | ○ | Article | Atomic Structure Evaluation of Solution-Processed a-IZO Films and Electrical Behavior of a-IZO TFTs | Understanding the chemical reaction pathway of the metal-salt precursor is essential for modifying the properties of solution-processed metal-oxide thin films and further improving their electrical performance. In this study, we focused on the structural growth of solution-processed amorphous indium-zinc-oxide (a-IZO) films and the electrical behavior of a-IZO thin-film transistors (TFT). To this end, solution-processed a-IZO films were prepared with respect to the Zn molar ratio, and their structural characteristics were analyzed. For the structural characteristic analysis of the a-IZO film, the cross-section, morphology, crystallinity, and atomic composition characteristics were used as the measurement results. Furthermore, the chemical reaction pathway of the nitrate precursor-based IZO solution was evaluated for the growth process of the a-IZO film structure. These interpretations of the growth process and chemical reaction pathway of the a-IZO film were assumed to be due to the thermal decomposition of the IZO solution and the structural rearrangement after annealing. Finally, based on the structural/chemical results, the electrical performance of the fabricated a-IZO TFT depending on the Zn concentration was evaluated, and the electrical behavior was discussed in relation to the structural characteristics. | Kim, Dongwook; Lee, Hyeonju; Kim, Bokyung; Zhang, Xue; Bae, Jin-Hyuk; Choi, Jong-Sun; Baang, Sungkeun | Hallym Univ, Dept Elect Engn, Chunchon 24252, South Korea; Shangdong Univ Sci & Technol, Coll Ocean Sci & Engn, Qingdao 266590, Peoples R China; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea; Hongik Univ, Dept Elect & Elect Engn, Seoul 04066, South Korea | 57218666795; 57040032800; 57210471966; 55949859900; 35326180700; 7501391400; 6602618479 | d.kim@hallym.ac.kr;hyeonjulee@hallym.ac.kr;d21012@hallym.ac.kr;skd996027@sdust.edu.cn;jhbae@ee.knu.ac.kr;jschoi@hongik.ac.kr;baang@hallym.ac.kr; | MATERIALS | MATERIALS | 1996-1944 | 15 | 10 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 0.25 | 2025-06-25 | 3 | 3 | solution-processed a-IZO films; thin-film transistor; metal-nitrate precursor | HIGH-PERFORMANCE; LOW-TEMPERATURE; TRANSISTORS; SEMICONDUCTORS | metal–nitrate precursor; solution-processed a-IZO films; thin-film transistor | Crystallinity; Decomposition; Film growth; II-VI semiconductors; Metals; Molar ratio; Morphology; Nitrates; Oxide films; Thin films; Zinc oxide; C. thin film transistor (TFT); Electrical behaviors; Indium zinc oxides; Indium-zinc-oxide films; Metal nitrate; Metal–nitrate precursor; Reaction pathways; Solution-processed; Solution-processed amorphous indium-zinc-oxide film; Structural characteristics; Thin film transistors | English | 2022 | 2022-05 | 10.3390/ma15103416 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Biomechanical Efficacy and Effectiveness of Orthodontic Treatment with Transparent Aligners in Mild Crowding Dentition-A Finite Element Analysis | Orthodontic treatment increasingly involves transparent aligners; however, biomechanical analysis of their treatment effects under clinical conditions is lacking. We compared the biomechanical efficacy and effectiveness of orthodontic treatment with transparent aligners and of fixed appliances in simulated clinical orthodontic treatment conditions using orthodontic finite element (FE) models. In the FE analysis, we used Model Activation/De-Activation analysis to validate our method. Fixed appliances and 0.75-mm and 0.5-mm thick transparent aligners were applied to a tooth-alveolar bone FE model with lingually-inclined and axially-rotated central incisors. Compared to the fixed appliance, the 0.75-mm and 0.5-mm transparent aligners induced 5%, 38%, and 28% and 21%, 62%, and 34% less movement of the central incisors and principal stress of the periodontal ligament and of the alveolar bone, respectively, for lingual inclination correction. For axial-rotation correction, these aligners induced 22%, 37%, and 40% and 28%, 67%, and 48% less tooth movement and principal stress of the periodontal ligament and of the alveolar bone, respectively. In conclusion, transparent aligners induced less tooth movement, it is sufficient for orthodontic treatment, but 0.5-mm aligners should be used for only mild corrections. Additionally, the Model Activation/De-Activation analysis method is suitable for FE analysis of orthodontic treatment reflecting clinical treatment conditions. | Seo, Jeong-Hee; Kim, Min-Seok; Lee, Jeong-Hyeon; Eghan-Acquah, Emmanuel; Jeong, Yong-Hoon; Hong, Mi-Hee; Kim, Bongju; Lee, Sung-Jae | DENTIS Co Ltd, R&D Ctr, Daegu 41065, South Korea; Inje Univ, Dept Biomed Engn, Gimhae 50834, South Korea; Griffith Univ, Sch Hlth Sci & Social Work, Gold Coast, Qld 4222, Australia; Osong Med Innovat Fdn, Cheongju 28160, South Korea; Kyungpook Natl Univ, Sch Dent, Dept Orthodont, Daegu 41940, South Korea; Seoul Natl Univ, Dent Life Sci Res Inst, Dent Hosp, Seoul 03080, South Korea | ; Kim, Bongju/M-2016-2019; Lee, Sang Yup/C-1526-2011; Jeong, Yong/C-1680-2011 | 57221471850; 57221465359; 57221469970; 57221466656; 55181537600; 57190379016; 55523207800; 35290561500 | sjh00@dentis.co.kr;kms20162296@gmail.com;jeonghyeon6089@gmail.com;eghanacquah@gmail.com;yonghoonj186@kbio.kr;mhhong1208@knu.ac.kr;bjkim016@snu.ac.kr;biomech100@gmail.com; | MATERIALS | MATERIALS | 1996-1944 | 15 | 9 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 1.17 | 2025-06-25 | 10 | 14 | orthodontic treatment; transparent aligner; finite element analysis; model activation; de-activation method; biomechanical efficacy and effectiveness | FIXED APPLIANCES; MOVEMENT | biomechanical efficacy and effectiveness; finite element analysis; model activation/ de-activation method; orthodontic treatment; transparent aligner | Activation analysis; Biomechanics; Chemical activation; Activation method; Aligners; Alveolar bones; Biomechanical efficacy and effectiveness; Finite element analyse; Finite element modelling (FEM); Model activation/ de-activation method; Orthodontic treatments; Transparent aligner; Treatment conditions; Finite element method | English | 2022 | 2022-05 | 10.3390/ma15093118 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Blown Composite Films of Low-Density/Linear-Low-Density Polyethylene and Silica Aerogel for Transparent Heat Retention Films and Influence of Silica Aerogel on Biaxial Properties | Blown films based on low-density polyethylene (LDPE)/linear low-density polyethylene (LLDPE) and silica aerogel (SA; 0, 0.5, 1, and 1.5 wt.%) were obtained at the pilot scale. Good particle dispersion and distribution were achieved without thermo oxidative degradation. The effects of different SA contents (0.5-1.5 wt.%) were studied to prepare transparent-heat-retention LDPE/LLDPE films with improved material properties, while maintaining the optical performance. The optical characteristics of the composite films were analyzed using methods such as ultraviolet-visible spectroscopy and electron microscopy. Their mechanical characteristics were examined along the machine and transverse directions (MD and TD, respectively). The MD film performance was better, and the 0.5% composition exhibited the highest stress at break. The crystallization kinetics of the LDPE/LLDPE blends and their composites containing different SA loadings were investigated using differential scanning calorimetry, which revealed that the crystallinity of LDPE/LLDPE was increased by 0.5 wt.% of well-dispersed SA acting as a nucleating agent and decreased by agglomerated SA (1-1.5 wt.%). The LDPE/LLDPE/SA (0.5-1.5 wt.%) films exhibited improved infrared retention without compromising the visible light transmission, proving the potential of this method for producing next-generation heat retention films. Moreover, these films were biaxially drawn at 13.72 MPa, and the introduction of SA resulted in lower draw ratios in both the MD and TD. Most of the results were explained in terms of changes in the biaxial crystallization caused by the process or the influence of particles on the process after a systematic experimental investigation. The issues were strongly related to the development of blown nanocomposites films as materials for the packaging industry. | Yang, Seong Baek; Lee, Jungeon; Yeasmin, Sabina; Park, Jae Min; Han, Myung Dong; Kwon, Dong-Jun; Yeum, Jeong Hyun | Kyungpook Natl Univ, Dept Biofibers & Biomat Sci, Daegu 41566, South Korea; Hans Intech Co Ltd, Daegu 41243, South Korea; Gyeongsang Natl Univ, Res Inst Green Energy Convergence Technol, Dept Mat Engn & Convergence Technol, Jinju 52828, South Korea | Yang, Seong/AAP-1745-2020; Park, JaeMin/ABG-2197-2021 | 56258526300; 57559595700; 57216565706; 58361029500; 57871629800; 36550312000; 6602257098 | ysb@knu.ac.kr;dlwjddjs2@gmail.com;yeasminsabina44@yahoo.com;woawoa9025@naver.com;mdhan@hanschemtek.com;rorrir@empas.com;jhyeum@knu.ac.kr; | MATERIALS | MATERIALS | 1996-1944 | 15 | 15 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 0.08 | 2025-06-25 | 1 | 1 | blends; composites; blown film extrusion; silica aerogel; biaxial properties; morphology; thermal properties; mechanical properties | POLYMER; NANOPARTICLES; PERFORMANCE; BLENDS | biaxial properties; blends; blown film extrusion; composites; mechanical properties; morphology; silica aerogel; thermal properties | Aerogels; Crystallinity; Crystallization kinetics; Differential scanning calorimetry; Light transmission; Packaging materials; Silica; Biaxial property; Blend; Blown film extrusion; Blown-films; Heat retention; Linear low-density polyethylene; Low-density silica; Lower density; Property; Silica aerogels; Morphology | English | 2022 | 2022-08 | 10.3390/ma15155314 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Correlation Analysis of Ultrasonic Pulse Velocity and Mechanical Properties of Normal Aggregate and Lightweight Aggregate Concretes in 30-60 MPa Range | This study classified the strength of normal aggregate concrete (NC) and lightweight aggregate concrete (LC) into three levels (30, 45, and 60 MPa). In particular, the compressive strength, ultrasonic pulse velocity, and elastic modulus were measured and analyzed at the ages of 1, 3, 7, and 28 days to establish the correlation between the compressive strength and the ultrasonic pulse velocity and between the elastic modulus and the ultrasonic pulse velocity. In addition, this study proposed strength and elastic modulus prediction equations as functions of the ultrasonic pulse velocity. The developed equations were compared with previously proposed strength prediction equations. The results showed that the measured mechanical properties of NC tended to be higher at all ages than in LC. However, LC45 exhibited relatively high compressive strength compared to NC45. The relative mechanical properties of LC compared to NC were the highest at 45 MPa and the lowest at 60 MPa. The relative ultrasonic pulse velocity converged at all levels as the age increased. Moreover, the correlation between the compressive strength and the ultrasonic pulse velocity in LC exceeded that of NC, and in LC, the correlation coefficient decreased as the strength increased. The correlation coefficients between the elastic modulus and the ultrasonic pulse velocity were high at all levels except for LC45. Finally, this study proposed compressive strength and elastic modulus prediction equations as an exponential function of LC. The proposed equations outperformed the previously proposed strength prediction equations. | Kim, Wonchang; Jeong, Keesin; Choi, Hyeonggil; Lee, Taegyu | Semyung Univ, Dept Fire & Disaster Prevent, Choongbuk 27136, South Korea; Kyungpook Natl Univ, Sch Architecture & Civil Engn, Daegu 41566, South Korea | 57659934800; 57305923800; 56430165800; 7501437272 | kimwc69082@gmail.com;jks@semyung.ac.kr;hgchoi@knu.ac.kr;ltg777@semyung.ac.kr; | MATERIALS | MATERIALS | 1996-1944 | 15 | 8 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 1.09 | 2025-06-25 | 14 | 14 | normal aggregate concrete; lightweight aggregate concrete; ultrasonic pulse velocity; strength prediction; elastic modulus prediction model; compressive strength; elastic modulus | ENGINEERING PROPERTIES; COMPRESSIVE STRENGTH; RATIO | compressive strength; elastic modulus; elastic modulus prediction model; lightweight aggregate concrete; normal aggregate concrete; strength prediction; ultrasonic pulse velocity | Concrete aggregates; Elastic moduli; Exponential functions; Forecasting; Light velocity; Light weight concrete; Aggregate concrete; Elastic moduli prediction; Elastic modulus prediction model; Lightweight aggregate concrete; Lightweight aggregates; Normal aggregate concrete; Prediction modelling; Strength prediction; Ultrasonic pulse velocity; Compressive strength | English | 2022 | 2022-04 | 10.3390/ma15082952 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Correlation between Pitch Impregnation Pressure and Pore Sizes of Graphite Block | This study aimed to investigate the effect of impregnation pressure on the decrease in porosity of impregnated bulk graphite. The correlation between pitch impregnation behavior and the pore sizes of the bulk graphite block was studied to determine the optimal impregnation pressure. The densities and porosities of the bulk graphite before and after pitch impregnation under various pressures between 10 and 50 bar were evaluated based on the Archimedes method and a mercury porosimeter. The density increased rates increased by 1.93-2.44%, whereas the impregnation rate calculated from the rate of open porosity decreased by 15.15-24.48%. The density increase rate and impregnation rate were significantly high when the impregnation pressures were 40 and 50 bar. Compared with impregnation pressures of 10, 20, and 30 bar, the minimum impregnatable pore sizes with impregnation pressures of 40 and 50 bar were 30-39 and 24-31 nm, respectively. The mercury intrusion porosimeter analysis results demonstrated that the pressure-sensitive pore sizes of the graphite blocks were in the range of 100-4500 nm. Furthermore, the ink-bottle-type pores in this range contributed predominantly to the effect of impregnation under pressure, given that the pitch-impregnated-into-ink-bottle-type pores were difficult to elute during carbonization. | Kim, Changkyu; Kwon, Woong; Lee, Moon Hee; Woo, Jong Seok; Jeong, Euigyung | Kyungpook Natl Univ, Dept Text Syst Engn, Daegu 41566, South Korea; Morgan Adv Mat, Adv Ctr Engn, 23,Dalseong2cha 4 Ro, Daegu 43013, South Korea | 57220131199; 57208867074; 57204428104; 37063910000; 35885596300 | se02126000@gmail.com;kwoong7242@naver.com;moonhee.lee@morganplc.com;JustinJongSeok.Woo@morganplc.com;wolfpack@knu.ac.kr; | MATERIALS | MATERIALS | 1996-1944 | 15 | 2 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 0.67 | 2025-06-25 | 7 | 8 | artificial graphite; graphite block; pitch; impregnation; pore properties | THERMAL-CONDUCTIVITY; BULK GRAPHITE; COAL-TAR; TEMPERATURE; BINDER | Artificial graphite; Graphite block; Impregnation; Pitch; Pore properties | Bottles; Carbonization; Graphite; Mercury (metal); Pore size; Pressure effects; Archimedes methods; Carbonisation; Graphite blocks; Ink-bottles; Mercury intrusion porosimeters; Mercury porosimeters; Open porosity; Pitch; Pore property; Pressure sensitive; Impregnation | English | 2022 | 2022-01 | 10.3390/ma15020561 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Corrosion of Stirred Electrochemical Nano-Crystalline Hydroxyapatite (HA) Coatings on Ti6Al4V | Ti6Al4V substrates were electrochemically deposited with nano-crystalline hydroxyapatite (HA) from aqueous electrolytes. Cathodic HA coatings were obtained when the electrolyte was stirred using ultrasonic vibration. Two current densities of 20 mA/cm(2) and 50 mA/cm(2) were employed. Polarization and electrochemical impedance spectroscopy (EIS) were the techniques used to estimate the corrosion of coatings in simulated body fluid (SBF). The results indicate good corrosion resistance for the coating obtained at 50 mA/cm(2) from ultrasonic stirring of the electrolyte. | Ramaswamy, Narayanan; Gopalan, Venkatachalam; Kwon, Tae Yub | VIT Chennai, Sch Mech Engn, Chennai 600127, India; VIT Chennai, Ctr Innovat & Prod Dev, Chennai 600127, India; Kyungpook Natl Univ, Sch Dent, Dept Dent Biomat, Daegu 41566, South Korea | Ramaswamy, Narayanan/ABI-6187-2020; Venkatachalam, Gopalan/ABI-6435-2020 | 7202724072; 57211661995; 7202206084 | narayanan.ramaswamy@vit.ac.in; | MATERIALS | MATERIALS | 1996-1944 | 15 | 23 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 0.17 | 2025-06-25 | 2 | 2 | Ti6Al4V; ultrasonics; coating; nano-crystalline; hydroxyapatite; corrosion | CALCIUM-PHOSPHATE COATINGS; OSTEOBLAST ADHESION; TITANIUM; BEHAVIOR; DEPOSITION; MORPHOLOGY; TI-6AL-4V; ALLOY; FILMS | coating; corrosion; hydroxyapatite; nano-crystalline; Ti6Al4V; ultrasonics | Aluminum alloys; Body fluids; Corrosion resistance; Corrosion resistant alloys; Corrosion resistant coatings; Electrochemical corrosion; Electrochemical impedance spectroscopy; Electrolytes; Hydroxyapatite; Nanocomposites; Titanium alloys; Ultrasonic effects; Ultrasonic waves; Vanadium alloys; Aqueous electrolyte; Crystalline hydroxyapatite; Electrochemical-impedance spectroscopies; Electrochemicals; Hydroxyapatite coating; Nanocrystallines; Polarization impedance; Simulated body fluids; Ultrasonic stirring; Ultrasonic-vibration; Ternary alloys | English | 2022 | 2022-12 | 10.3390/ma15238609 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Crash Performance of Strength Gradient Tube Induced by Selective Laser Patterning | This paper presents an investigation of the performance of a 22 MnB5 tube after local heat treatment according to a patterning shape under dynamic crash test conditions to propose the patterning shape with the best energy absorption efficiency. Numerical simulations support experimental results to validate the deformation mode during dynamic crash test as well as the strain distribution of the specimen. The helical patterning not only demonstrates the highest axial loading force and energy absorbance in both static and dynamic crash tests, but also can be easily fabricated in a short time. The helical pattern can optimize different pitch sizes according to the thickness and diameter of the cylindrical tube, and it has the highest energy absorption rate with 83.0% in dynamic conditions. | Kim, HyungGyu; Trinh, NamHoai; Kwon, JunBeom; Hong, SukJoon; Park, SungHyuk; Yoon, JongHun | Hanyang Univ, Dept Mech Design Engn, 222 Wangsimni Ro, Seoul 04763, South Korea; Hanyang Univ, BK21 FOUR ERICA ACE Ctr, Dept Mech Engn, 55 Hanyangdaehak Ro, Ansan 15588, Gyeonggi Do, South Korea; Korea Inst Mat Sci KIMS, Mat Anal & Evaluat Dept, 797 Changwon Daero, Chang Won 51508, Gyeongsangnam D, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, 80 Daehakro, Daegu 41566, South Korea; AIDICOME Inc, 55 Hanyangdaehak Ro, Ansan 15588, Gyeonggi Do, South Korea | 57201583389; 57930561600; 55496112100; 34973077200; 54786002500; 56449838900 | yooncsmd@gmail.com; | MATERIALS | MATERIALS | 1996-1944 | 15 | 19 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 0 | 2025-06-25 | 0 | 0 | local hardening; laser; strain rate sensitivity; FEM analysis; auxetic; helical; laser patterning | HEAT-TREATED BLANKS; TAILORED PROPERTIES; STEEL; BEHAVIOR; DESIGN | auxetic; FEM analysis; helical; laser; laser patterning; local hardening; strain rate sensitivity | Absorption efficiency; Accidents; Crashworthiness; Finite element method; Manganese compounds; Strain rate; Auxetics; Crash performance; Crash tests; Fem analyze; Helical; Laser patterning; Local hardening; Performance; Strain-rate sensitivity; Strength gradients; Energy absorption | English | 2022 | 2022-10 | 10.3390/ma15196580 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Effect of Carbon Nanotubes on the Mechanical, Crystallization, Electrical and Thermal Conductivity Properties of CNT/CCF/PEKK Composites | Carbon nanotube/continuous carbon fiber-reinforced poly(etherketoneketone) (CNT/CCF/PEKK) prepreg tapes were prepared by the wet powder impregnation method, and then the prepreg tapes were molded into laminates. The effects of carbon nanotubes on the mechanical properties, conductivity, thermal conductivity and crystallinity of the composites were studied by universal testing machine, thermal conductivity and resistivity tester, dynamic mechanical analyzer (DMA) and differential scanning calorimeter (DSC). The results show that when the content of carbon nanotubes is 0.5 wt% (relative to the mass of PEKK resin, the same below), the flexural strength and interlaminar shear strength of the laminates reach the maximum, which are increased by 15.99% and 18.16%, respectively, compared with the laminates without carbon nanotubes. The results of conductivity and thermal conductivity show that the higher the content of carbon nanotubes, the better the conductivity and thermal conductivity of the material. DSC results show that the addition of CNT promoted the crystallization of PEKK in the material and decreased the cold crystallization of PEKK. DMA results show that the deformation resistance of the material can be improved by adding an appropriate amount of CNT and the bonding between CF and PEKK can be enhanced, while excessive CNT destroys this phenomenon. | Yan, Xu; Qiao, Liang; Tan, Hao; Tan, Hongsheng; Liu, Changheng; Zhu, Kaili; Lin, Zhitao; Xu, Shanshan | Shandong Univ Technol, Sch Mat Sci & Engn, Zibo 255049, Peoples R China; Kyungpook Natl Univ, Sch Appl Chem Engn, Polymer Nano Mat Lab, Daegu 41566, South Korea; Shandong Qinghe Chem Technol Co Ltd, Zibo 255000, Peoples R China | 57223314122; 57223314126; 56895457900; 22936036100; 57208653932; 57208651200; 55430572400; 57202866447 | polaris_xu@foxmail.com;qiao166@163.com;tanhao@naver.com;hstan@sdut.edu.cn;15666700706@163.com;18369902273@163.com;lin.zhi.tao@163.com;xushanshan@sdut.edu.cn; | MATERIALS | MATERIALS | 1996-1944 | 15 | 14 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 0.75 | 2025-06-25 | 6 | 9 | carbon fiber; carbon nanotube; PEKK; wet power impregnation; laminate | DAMAGE | carbon fiber; carbon nanotube; laminate; PEKK; wet power impregnation | Carbon fibers; Crystallinity; Differential scanning calorimetry; Impregnation; Laminated composites; Reinforced plastics; Shear strength; Carbon fiber reinforced; Conductivity properties; Dynamic mechanical analyzer; Effect of carbons; Mechanical; PEKK; Power; Prepregs; The differential scanning calorimeter (DSC); Wet power impregnation; Carbon nanotubes | English | 2022 | 2022-07 | 10.3390/ma15144950 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Enhanced Switching Reliability of Sol-Gel-Processed Y2O3 RRAM Devices Based on Y2O3 Surface Roughness-Induced Local Electric Field | Sol-gel-processed Y2O3 films were used as active channel layers for resistive random access memory (RRAM) devices. The fabricated ITO/Y2O3/Ag RRAM devices exhibited the properties of conventional bipolar memory devices. A triethylamine stabilizer with a high vapor pressure and low surface tension was added to realize the local electric field area. During drying and high-temperature post-annealing processes, the large convective flow enhanced the surface elevation, and the increased -OH groups accelerated the hydrolysis reaction and aggregation. These phenomena afforded Y2O3 films with an uneven surface morphology and an increased surface roughness. The increased roughness of the Y2O3 films attributable to the triethylamine stabilizer enhanced the local electrical field, improved device reliability, and achieved successful repetition of the switching properties over an extended period. | Kim, Do-Won; Kim, Hyeon-Joong; Lee, Won-Yong; Kim, Kyoungdu; Lee, Sin-Hyung; Bae, Jin-Hyuk; Kang, In-Man; 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; Korea Aerosp Univ, Sch Elect & Informat Engn, Goyang 10540, South Korea | ; Kim, Byung Joo/ABG-7715-2021; Lee, Sin-Hyung/ABD-6425-2022; Kim, Do-Yeon/B-1877-2009 | 59110033500; 57221742722; 57209527128; 57221754528; 57226880204; 35326180700; 7203062678; 36004977500; 57194107504 | ehdnjs5169@knu.ac.kr;dan7620@knu.ac.kr;yongsz@knu.ac.kr;kkd9506@knu.ac.kr;sinhlee@knu.ac.kr;jhbae@ee.knu.ac.kr;imkang@ee.knu.ac.kr;kke@kau.ac.kr;j1jang@knu.ac.kr; | MATERIALS | MATERIALS | 1996-1944 | 15 | 5 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 1.5 | 2025-06-25 | 17 | 19 | sol-gel; Y2O3; RRAM; surface roughness; local electric field; reliability | MEMORY; SELECTION; GROWTH; SET | Local electric field; Reliability; RRAM; Sol–gel; Surface roughness; Y<sub>2</sub>O<sub>3</sub> | Annealing; Deterioration; Morphology; Reliability; RRAM; Sols; Surface morphology; Surface roughness; Active channel layers; Drying temperature; Local electric field; Property; Random access memory; Resistive random access memory; Sol'gel; Stabiliser; Triethylamines; Vapour pressures; Electric fields | English | 2022 | 2022-03 | 10.3390/ma15051943 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Evaluation of Recycled Spent Coffee Material Treated with Animal Glue, Starch, and Red Clay as Acid Materials | Annual coffee consumption has increased to 10 million tons. Of the coffee consumed, 65% is discarded as spent coffee grounds (SCG). However, most SCG are buried in the ground as organic waste. The more coffee consumption increases, the more land is used for disposing of spent coffee. SCG recycling has gotten considerable attention as a solution involved in these issues. The construction community has studied means and methods to recycle SCG as construction materials, such as bricks, subgrade fillers, thermal insulators, etc. This paper presents a new method, which recycles SCG as a construction material, maximally using its acidity. The SCG were hardened with natural binders (i.e., animal glue (AG) and starch (S)) and red clay (RC). The SCG mixtures were pressed with 2 MPa in a cylindrical mold and cured for 7 days. Then, the strength, durability, and pH tests were measured. The AG- and RC-treated SCG sample, which outputs 1933 kPa of strength and a 4.9 pH value, is identified as the optimal sampling method among the acid materials produced in this study. The optimal sample decreases the pH to approximately 7 of water where 68% weight of Ordinary Portland cement was soaked in. | Park, Sung-Sik; Woo, Seung-Wook; Lee, Jung-Shin; Yun, Young-Mook; Lee, Dong-Eun | Kyungpook Natl Univ, Dept Civil Engn, Daehakro 80, Daegu 41566, South Korea; Kyungpook Natl Univ, Intelligent Construct Automat Ctr, Global Plaza 905,Daehakro 80, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Architecture Civil Environm & Energy Engn, 80 Daehakro, Daegu 41566, South Korea | ; Lee, Jae/E-6796-2015 | 36241850300; 57212917862; 57210867035; 7201731110; 56605563300 | dolee@knu.ac.kr; | MATERIALS | MATERIALS | 1996-1944 | 15 | 19 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 0.25 | 2025-06-25 | 1 | 3 | spent coffee ground; red clay; waste recycling; construction material | RESISTANCE; PRODUCTS; IMPACTS; WASTE | construction material; red clay; spent coffee ground; waste recycling | Animals; Binders; Durability; Glues; Gluing; Portland cement; Recycling; Animal glues; Coffee consumption; Construction communities; Durability test; Organic wastes; Red clay; Spent coffee grounds; Strength tests; Thermal insulators; Wastes recycling; Starch | English | 2022 | 2022-10 | 10.3390/ma15196622 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Explicit Thermal Resistance Model of Self-Heating Effects of AlGaN/GaN HEMTs with Linear and Non-Linear Thermal Conductivity | We presented an explicit empirical model of the thermal resistance of AlGaN/GaN high-electron-mobility transistors on three distinct substrates, including sapphire, SiC, and Si. This model considered both a linear and non-linear thermal resistance model of AlGaN/GaN HEMT, the thickness of the host substrate layers, and the gate length and width. The non-linear nature of channel temperature-visible at the high-power dissipation stage-along with linear dependency, was constructed within a single equation. Comparisons with the channel temperature measurement procedure (DC) and charge-control-based device modeling were performed to verify the model's validity, and the results were in favorable agreement with the observed model data, with only a 1.5% error rate compared to the measurement data. An agile expression for the channel temperature is also important for designing power devices and monolithic microwave integrated circuits. The suggested approach provides several techniques for investigation that could otherwise be impractical or unattainable when utilizing time-consuming numerical simulations. | Chakraborty, Surajit; Amir, Walid; Shin, Ju-Won; Shin, Ki-Yong; Cho, Chu-Young; Kim, Jae-Moo; Hoshi, Takuya; Tsutsumi, Takuya; Sugiyama, Hiroki; Matsuzaki, Hideaki; Kwon, Hyuk-Min; Kim, Dae-Hyun; Kim, Tae-Woo | Univ Ulsan, Dept Elect Elect & Comp Engn, Ulsan 44610, South Korea; Korea Adv Nano Fab Ctr, Suwon 16229, Gyeonggi Do, South Korea; NTT Corp, NTT Device Technol Labs, Atsugi, Kanagawa 2430198, Japan; Korea Polytech, Dept Semicond Proc Equipment, Semicond Convergence Campus, Anseong 17550, South Korea; Kyungpook Natl Univ, Sch Elect Engn, 80 Daehak Ro, Daegu 41566, South Korea | ; Chakraborty, Surajit/IXD-2458-2023; Kim, Yong/H-6157-2013; Kim, Junghwan/AAQ-9204-2021; Hoshi, Takuya/JRZ-1293-2023 | 57363002700; 57220184861; 57344071200; 57221120602; 23972116700; 57343343000; 36442190000; 37007126500; 35417698400; 7202461821; 55549386600; 57212363794; 57203495132 | dae-hyun.kim@ee.knu.ac.kr;twkim78@ulsan.ac.kr; | MATERIALS | MATERIALS | 1996-1944 | 15 | 23 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 0.92 | 2025-06-25 | 10 | 11 | AlGaN; GaN; self-heating phenomenon; modeling; substrates; thermal resistance | CHANNEL TEMPERATURE; GAN; PERFORMANCE; FREQUENCY; SAPPHIRE; HFETS | AlGaN/GaN; modeling; self-heating phenomenon; substrates; thermal resistance | Aluminum gallium nitride; Gallium nitride; High electron mobility transistors; III-V semiconductors; Power semiconductor devices; Sapphire; Silicon carbide; Temperature measurement; Thermal conductivity; Wide band gap semiconductors; AlGaN/GaN; AlGaN/GaN HEMTs; AlGaN/GaN-HEMT; Channel temperature; Modeling; Non linear; Resistance models; Self-heating; Self-heating effect; Self-heating phenomenon; Substrates | English | 2022 | 2022-12 | 10.3390/ma15238415 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Flexible Sol-Gel-Processed Y2O3 RRAM Devices Obtained via UV/Ozone-Assisted Photochemical Annealing Process | Flexible indium tin oxide (ITO)/Y2O3/Ag resistive random access memory (RRAM) devices were successfully fabricated using a thermal-energy-free ultraviolet (UV)/ozone-assisted photochemical annealing process. Using the UV/ozone-assisted photochemical process, the organic residue can be eliminated, and thinner and smother Y2O3 films than those formed using other methods can be fabricated. The flexible UV/ozone-assisted photochemical annealing process-based ITO/Y2O3/Ag RRAM devices exhibited the properties of conventional bipolar RRAM without any forming process. Furthermore, the pure and amorphous-phase Y2O3 films formed via this process showed a decreased leakage current and an increased high-resistance status (HRS) compared with the films formed using other methods. Therefore, RRAM devices can be realized on plastic substrates using a thermal-energy-free UV/ozone-assisted photochemical annealing process. The fabricated devices exhibited a resistive window (ratio of HRS/low-resistance status (LRS)) of >10(4), with the HRS and LRS values remaining almost the same (i.e., limited deterioration occurred) for 10(4) s and up to 10(2) programming/erasing operation cycles. | Kim, Hyeon-Joong; Kim, Do-Won; Lee, Won-Yong; Kim, Kyoungdu; Lee, Sin-Hyung; Bae, Jin-Hyuk; Kang, In-Man; 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; Korea Aerosp Univ, Sch Elect & Informat Engn, Goyang 10540, South Korea | Lee, Sin-Hyung/ABD-6425-2022; Kim, Byung Joo/ABG-7715-2021 | 57221742722; 59110033500; 57209527128; 57221754528; 57226880204; 35326180700; 7203062678; 36004977500; 57194107504 | dan7620@knu.ac.kr;ehdnjs5169@knu.ac.kr;yongsz@knu.ac.kr;kkd9506@knu.ac.kr;sinhlee@knu.ac.kr;jhbae@ee.knu.ac.kr;imkang@ee.knu.ac.kr;kke@kau.ac.kr;j1jang@knu.ac.kr; | MATERIALS | MATERIALS | 1996-1944 | 15 | 5 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 1.34 | 2025-06-25 | 15 | 17 | sol-gel; Y2O3; RRAM; UV; ozone; photochemical; flexible | THIN-FILM TRANSISTORS; OPTICAL-PROPERTIES; MEMORY; THICKNESS; BEHAVIOR; SET; SI | Flexible; Photochemical; RRAM; Sol-gel; UV/ozone; Y<sub>2</sub>O<sub>3</sub> | Annealing; Indium compounds; RRAM; Sol-gel process; Sol-gels; Tin oxides; Annealing process; Flexible; High resistance; Low resistance; Photochemical process; Photochemicals; Random access memory; Resistive random access memory; Sol'gel; Ultraviolet-ozone; Deterioration | English | 2022 | 2022-03 | 10.3390/ma15051899 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Improved Environment Stability of Y2O3 RRAM Devices with Au Passivated Ag Top Electrodes | In this study, we fabricated sol-gel-processed Y2O3-based resistive random-access memory (RRAM) devices. The fabricated Y2O3 RRAM devices exhibited conventional bipolar RRAM device characteristics and did not require the forming process. The long-term stability of the RRAM devices was investigated. The Y2O3 RRAM devices with a 20 nm thick Ag top electrode showed an increase in the low resistance state (LRS) and high resistance state (HRS) and a decrease in the HRS/LRS ratio after 30 days owing to oxidation and corrosion of the Ag electrodes. However, Y2O3 RRAM devices with inert Au-passivated Ag electrodes showed a constant RRAM device performance after 30 days. The 150 nm-thick Au passivation layer successfully suppressed the oxidation and corrosion of the Ag electrode by minimizing the chance of contact between water or oxygen molecules and Ag electrodes. The Au/Ag/Y2O3/ITO RRAM devices exhibited more than 300 switching cycles with a decent resistive window (>10(3)). They maintained constant LRS and HRS resistances for up to 10(4) s, without significant degradation of nonvolatile memory properties for 30 days while stored in air. | Kim, Hae-In; Lee, Taehun; Lee, Won-Yong; Kim, Kyoungdu; Bae, Jin-Hyuk; Kang, In-Man; Lee, Sin-Hyung; 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; Korea Aerosp Univ, Sch Elect & Informat Engn, Goyang 10540, South Korea | ; Lee, Sin-Hyung/ABD-6425-2022 | 57929938600; 57930311700; 57209527128; 57221754528; 35326180700; 7203062678; 57226880204; 36004977500; 57194107504 | j1jang@knu.ac.kr; | MATERIALS | MATERIALS | 1996-1944 | 15 | 19 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 0.67 | 2025-06-25 | 10 | 9 | sol-gel; Y2O3; RRAM; environment stability; passivation | SWITCHING CHARACTERISTICS; MEMORY; MOISTURE | environment stability; passivation; RRAM; sol-gel; Y<sub>2</sub>O<sub>3</sub> | Electrodes; Gold; RRAM; Silver; Sol-gel process; Sol-gels; Ag electrode; Device characteristics; Environment stabilities; High-resistance state; Long term stability; Low-resistance state; Random access memory; Resistive random-access memory; Sol'gel; State resistance; Passivation | English | 2022 | 2022-10 | 10.3390/ma15196859 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Investigation of Strength Properties for Concrete Containing Fine-Rubber Particles Using UPV | Since the early 1990s, many studies were conducted to utilize waste tires as a replacement for natural coarse and fine aggregates in concrete, known as rubberized concrete or rubber-concrete. In this paper, an experimental study was performed on the strength properties of concrete containing fine-rubber particles as a replacement of fine aggregate, using destructive and non-destructive tests. Ultrasonic pulse velocity (UPV) tests were used to evaluate the strength property of rubber-concrete as a non-destructive test. Compressive and splitting tensile strengths were determined for four different volume contents of fine-rubber particles and exponential equations were proposed for the relationship between compressive, splitting tensile strength and the UPV of rubber-concrete, respectively. With the limited conditions in this paper, it found that UPV tests could also be used to estimate the compressive and tensile strengths of rubber-concrete, that are used in other types of concrete. | Choi, Yeol; Kim, Il-Hyun; Lim, Hyeon-Jin; Cho, Chang-Geun | Kyungpook Natl Univ, Sch Architecture, Daegu 41566, South Korea; Chosun Univ, Dept Architectural Engn, Gwangju 61452, South Korea | Cho, Chang-Geun/B-3875-2015 | 14519187800; 57704937800; 55342669500; 24722559700 | choiyeol@knu.ac.kr;kih328@knu.ac.kr;jericho0220@naver.com;chocg@chosun.ac.kr; | MATERIALS | MATERIALS | 1996-1944 | 15 | 10 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 1.17 | 2025-06-25 | 12 | 14 | fine-rubber particle; rubber-concrete; UPV; non-destructive test; toughness; strength property | ULTRASONIC PULSE VELOCITY; COMPRESSIVE STRENGTH; TIRE-RUBBER; HIGH-VOLUME | fine-rubber particle; non-destructive test; rubber-concrete; strength property; toughness; UPV | Bridge decks; Compressive strength; Concrete aggregates; Concrete testing; Rubber; Tensile strength; Ultrasonic testing; Coarse aggregates; Fine aggregates; Fine-rubber particle; Nondestructive tests; Rubber concrete; Rubber particles; Strength property; Ultrasonic pulse velocity; Ultrasonic pulse velocity tests; Waste tires; Nondestructive examination | English | 2022 | 2022-05 | 10.3390/ma15103452 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Investigation on Atomic Bonding Structure of Solution-Processed Indium-Zinc-Oxide Semiconductors According to Doped Indium Content and Its Effects on the Transistor Performance | The atomic composition ratio of solution-processed oxide semiconductors is crucial in controlling the electrical performance of thin-film transistors (TFTs) because the crystallinity and defects of the random network structure of oxide semiconductors change critically with respect to the atomic composition ratio. Herein, the relationship between the film properties of nitrate precursor-based indium-zinc-oxide (IZO) semiconductors and electrical performance of solution-processed IZO TFTs with respect to the In molar ratio was investigated. The thickness, morphological characteristics, crystallinity, and depth profile of the IZO semiconductor film were measured to analyze the correlation between the structural properties of IZO film and electrical performances of the IZO TFT. In addition, the stoichiometric and electrical properties of the IZO semiconductor films were analyzed using film density, atomic composition profile, and Hall effect measurements. Based on the structural and stoichiometric results for the IZO semiconductor, the doping effect of the IZO film with respect to the In molar ratio was theoretically explained. The atomic bonding structure by the In doping in solution-processed IZO semiconductor and resulting increase in free carriers are discussed through a simple bonding model and band gap formation energy. | Kim, Dongwook; Lee, Hyeonju; Kim, Bokyung; Baang, Sungkeun; Ejderha, Kadir; Bae, Jin-Hyuk; Park, Jaehoon | Hallym Univ, Dept Elect Engn, Chunchon 24252, South Korea; Bingol Univ, Fac Sci & Arts, Dept Phys, TR-12000 Bingol, Turkey; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea | 57218666795; 57040032800; 57210471966; 6602618479; 34976449200; 35326180700; 55717156300 | jhbae@ee.knu.ac.kr;jaypark@hallym.ac.kr; | MATERIALS | MATERIALS | 1996-1944 | 15 | 19 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2022 | 3.4 | 24.7 | 0.58 | 2025-06-25 | 6 | 7 | solution-processed IZO semiconductor; thin-film transistor; atomic structure; doping | THIN-FILM TRANSISTORS; AMORPHOUS-SILICON; ELECTRONIC-STRUCTURE; EXTRACTION; MOBILITY; DEFECTS; ENERGY; CHARGE; GAP | atomic structure; doping; solution-processed IZO semiconductor; thin-film transistor | Atoms; Crystallinity; Energy gap; Field effect transistors; II-VI semiconductors; Molar ratio; Oxide films; Oxide semiconductors; Semiconducting indium compounds; Semiconductor doping; Thin film circuits; Thin films; Zinc oxide; Atomic bonding; Atomic compositions; Atomic structure; Bonding structure; C. thin film transistor (TFT); Composition ratio; Electrical performance; Indium zinc oxides; Solution-processed; Solution-processed indium-zinc-oxide semiconductor; Thin film transistors | English | 2022 | 2022-10 | 10.3390/ma15196763 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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