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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 | Antioxidant Analogue 6-Amino-2,4,5-Trimethylpyridin-3-ol Ameliorates Experimental Colitis in Mice | Background Oxidative stress has been suggested to be a factor contributing to the disease severity of inflammatory bowel disease (IBD). BJ-1108, a derivative of 6-amino-2,4,5-trimethylpyridin-3-ol, is reported to significantly inhibit the generation of reactive oxygen species (ROS) in vitro. However, whether this molecule affects intestinal inflammation is largely unknown. We aimed to investigate the effect of BJ-1108 on dextran sulfate sodium (DSS)-induced experimental colitis in mice. Methods Colitis was induced in mice with DSS, and disease severity was estimated by evaluating body weight, colon length, histology, immune cell infiltration, and intestinal permeability. We examined the protective effects of BJ-1108 on barrier function using Caco-2 cells. Last, we estimated the impact of BJ-1108 on the phosphorylation of NF-kB, PI3K/AKT, and mitogen-activated protein kinases. Results Mice treated with BJ-1108 exhibited improved disease severity, as indicated by evaluations of body weight, histological scores, spleen weight, and infiltrates of T cells and macrophages. The administration of BJ-1108 inhibited the colonic mRNA expression of IL-6 and IL-1 beta in vivo. Additionally, BJ-1108 limited intestinal permeability and enhanced the expression of tight junction (TJ) proteins such as claudin-1 and claudin-3 in the DSS-induced colitis model. In an in vitro model using Caco-2 cells, BJ-1108 ameliorated cytokine-induced ROS generation in a dose-dependent manner and remarkably recovered barrier dysfunction as estimated by evaluating transepithelial electrical resistance and TJ protein expression. BJ-1108 suppressed the NF-kB/ERK/PI3K pathway. Conclusions This study demonstrated that BJ-1108 ameliorated intestinal inflammation in an experimental colitis mouse model, suggesting possible therapeutic implications for IBD. | Lee, Hoyul; Lee, Joon Seop; Cho, Hyun Jung; Lee, Yu-Jeong; Kim, Eun Soo; Kim, Sung Kook; Nam, Tae-gyu; Jeong, Byeong-Seon; Kim, Jung-Ae | Kyungpook Natl Univ Hosp, Leading Edge Res Ctr Drug Discovery & Dev Diabet, Daegu, South Korea; Kyungpook Natl Univ Hosp, Biomed Res Inst, Daegu, South Korea; Kyungpook Natl Univ Hosp, Div Gastroenterol, Dept Internal Med, Daegu, South Korea; Kyungpook Natl Univ, Sch Med, Dept Internal Med, Daegu, South Korea; Hanyang Univ, Coll Pharm, Ansan, South Korea; Yeungnam Univ, Coll Pharm, Gyongsan, South Korea | ; Kim, Sang/J-5398-2012; Kwak, Sang Gyu/AAG-4341-2021 | 58017533900; 57205374013; 57191496377; 57189520824; 57203086704; 34770060400; 8435892100; 34975054400; 7601363878 | dandy813@hanmail.net; | DIGESTIVE DISEASES AND SCIENCES | DIGEST DIS SCI | 0163-2116 | 1573-2568 | 66 | 4 | SCIE | GASTROENTEROLOGY & HEPATOLOGY | 2021 | 3.487 | 60.8 | 0.26 | 2025-07-30 | 5 | 5 | Inflammatory bowel disease; Reactive oxygen species; Antioxidant; DSS-induced colitis | DEXTRAN SODIUM-SULFATE; ACETYLCYSTEINE PLUS MESALAMINE; EPITHELIAL BARRIER DYSFUNCTION; NF-KAPPA-B; OXIDATIVE STRESS; INTERFERON-GAMMA; NITRIC-OXIDE; IKK-BETA; CELLS; ACTIVATION | Antioxidant; DSS-induced colitis; Inflammatory bowel disease; Reactive oxygen species | Aminopyridines; Aniline Compounds; Animals; Antioxidants; Caco-2 Cells; Colitis; Cytokines; Disease Models, Animal; Humans; Intestinal Mucosa; Mice; Oxidative Stress; Permeability; Protective Agents; Severity of Illness Index; Treatment Outcome; 6 amino 2,4,5 trimethylpyridin 3 ol; antiinflammatory agent; antioxidant; bj 1108; CD3 antigen; claudin 1; claudin 3; claudin 4; immunoglobulin enhancer binding protein; interleukin 10; interleukin 12; interleukin 1beta; interleukin 6; messenger RNA; mitogen activated protein kinase; phosphatidylinositol 3 kinase; unclassified drug; aminopyridine derivative; aniline derivative; antioxidant; BJ-1108; cytokine; protective agent; animal cell; animal experiment; animal model; animal tissue; antiinflammatory activity; antioxidant activity; Article; body weight; Caco-2 cell line; CD3+ T lymphocyte; cell infiltration; controlled study; dextran sulfate sodium-induced colitis; disease severity; DNA library; down regulation; electric resistance; enzyme phosphorylation; immunocompetent cell; in vitro study; in vivo study; intestine epithelium cell; intestine mucosa permeability; macrophage; male; MAPK signaling; mouse; nonhuman; Pi3K/Akt signaling; practice guideline; priority journal; protein expression; spleen weight; upregulation; Western blotting; animal; blood; colitis; disease model; drug effect; human; immunology; intestine mucosa; metabolism; oxidative stress; pathology; permeability; severity of illness index; treatment outcome | English | 2021 | 2021-04 | 10.1007/s10620-020-06267-6 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Direct-Acting Antivirals Improve Treatment Outcomes in Patients with Hepatitis C Virus-Related Hepatocellular Carcinoma Treated with Transarterial Chemoembolization: A Nationwide, Multi-center, Retrospective Cohort Study | Background and Aims The influence of direct-acting antivirals (DAAs) on chronic hepatitis C (CHC)-related hepatocellular carcinoma (HCC) remains controversial. We investigated the effect of eradicating CHC using DAAs on treatment outcomes in patients with CHC-related HCC treated with transarterial chemoembolization (TACE). Methods This nationwide, multi-center, retrospective study recruited patients with CHC-related HCC treated with TACE as the first-line anti-cancer treatment, and who achieved a sustained virological response (SVR) using DAAs (DAA group) between 2006 and 2017. Patients achieving an SVR following interferon-based treatment (IFN group) and those without treatment (control group) were also recruited for comparison. Results A total of 425 patients were eligible for the study. Of these, 356 (83.8%), 26 (6.1%), and 43 (10.1%) were allocated to the control, IFN, and DAA groups, respectively. A multivariate analysis showed that liver cirrhosis, segmental portal vein thrombosis, and larger maximal tumor size independently predicted an increased risk of progression (allp < 0.05), whereas, the DAA group (vs. IFN and control groups) independently predicted a reduced risk of progression (hazard ratio (HR) = 0.630, 95% confidence interval 0.411-0.966,p = 0.034). The cumulative incidence rate of HCC progression in the DAA group was significantly lower than that in the IFN and control groups (p = 0.033, log-rank test). In addition, the DAA group (vs. IFN and control groups) was independently associated with a reduced risk of mortality (p = 0.042). Conclusions DAA treatment provided significantly prolonged progression-free survival in patients with CHC-related HCC treated with TACE compared to that in patients administered IFN or no treatment. | Hyun, Hye Kyung; Cho, Eun Ju; Park, Soo Young; Hong, Young Mi; Kim, Soon Sun; Kim, Hwi Young; Heo, Nae-Yun; Park, Jung Gil; Sinn, Dong Hyun; Kang, Wonseok; Jeong, Song Won; Song, Myeong Jun; Park, Hana; Lee, Danbi; Lee, Yong Sun; Cho, Sung Bum; An, Chan Sik; Rhee, Hyung Jin; Lee, Hyun Woong; Kim, Beom Kyung; Park, Jun Yong; Kim, Do Young; Ahn, Sang Hoon; Han, Kwang-Hyub; Lee, Jeong-Hoon; Yu, Su Jong; Kim, Yoon Jun; Yoon, Jung-Hwan; Tak, Won Young; Kweon, Young Oh; Yoon, Ki Tae; Cho, Mong; Cheong, Jae Youn; Park, Seung Ha; Kim, Seung Up | Yonsei Univ, Yonsei Liver Ctr, Dept Internal Med, Coll Med, 50-1 Yonsei Ro, Seoul 03722, South Korea; Seoul Natl Univ, Dept Internal Med & Liver Res Inst, Coll Med, Seoul, South Korea; Kyungpook Natl Univ, Sch Med, Dept Internal Med, Daegu, South Korea; Pusan Natl Univ, Res Inst Convergence Biomed Sci & Technol, Dept Internal Med, Yangsan Hosp, Yangsan, South Korea; Ajou Univ, Dept Gastroenterol, Sch Med, Suwon, South Korea; Ewha Woman Univ, Coll Med, Dept Internal Med, Seoul, South Korea; Inje Univ, Coll Med, Dept Internal Med, Busan, South Korea; Yeungnam Univ, Dept Internal Med, Coll Med, Daegu, South Korea; Sungkyunkwan Univ, Samsung Med Ctr, Dept Internal Med, Sch Med, Seoul, South Korea; Soonchunhyang Univ, Soonchunhyang Univ Hosp Seoul, Dept Internal Med, Coll Med, Seoul, South Korea; Catholic Univ Korea, Coll Med, Dept Internal Med, Seoul, South Korea; Univ Ulsan, Asan Med Ctr, Dept Internal Med, Coll Med, Seoul, South Korea; Korea Univ, Dept Internal Med, Coll Med, Seoul, South Korea; Chonnam Natl Univ, Dept Internal Med, Med Sch, Gwangju, South Korea | Kim, Yoon/J-2746-2012; Sinn, Dong/JAC-4247-2023; SANG-HOON, AHN/AAV-2600-2020; Kim, Dong/F-4608-2014; Kim, Sun/L-4239-2013; Kim, Heui-Soo/ABF-3773-2021; Rhee, Hyungjin/T-7619-2019; Lee, Jeong-Hoon/Q-1055-2018; Kim, Kyung/I-5501-2015; Yoon, Jung/J-5563-2012; Kim, Sejoong/J-5356-2015; song, myeongjun/F-7390-2017; Ahn, Sang Hoon/AFM-2603-2022; LEE, HYUN/ABC-6119-2021; Park, Jun/H-7127-2019; Kim, Duk Hwan/AAC-5666-2022; Heo, Nae-Yun/LUY-9667-2024; Park, Jung/AAK-5167-2020; Lee, Young-Sun/ABI-6420-2020 | 57554457700; 56493998900; 57191674344; 56405847000; 36056907800; 56493773500; 14022750600; 57216816399; 23493891100; 19640141000; 55625009600; 55458619100; 59111312100; 36934067900; 13407433000; 57216641631; 54381478200; 55268406500; 55509204800; 35302925200; 47861376300; 56119929100; 7401989551; 7402963689; 55936232200; 7405730251; 25947520600; 16246591600; 7004074582; 7004694832; 14820137300; 7401727448; 7004933299; 35171133100; 54933821200 | KSUKOREA@yuhs.ac; | DIGESTIVE DISEASES AND SCIENCES | DIGEST DIS SCI | 0163-2116 | 1573-2568 | 66 | 7 | SCIE | GASTROENTEROLOGY & HEPATOLOGY | 2021 | 3.487 | 60.8 | 0.09 | 2025-07-30 | 4 | 2 | Hepatocellular carcinoma; Hepatitis C virus; Direct-acting antiviral; Transarterial chemoembolization; Progression | THERAPY; RECURRENCE; RIBAVIRIN | Direct-acting antiviral; Hepatitis C virus; Hepatocellular carcinoma; Progression; Transarterial chemoembolization | Aged; Antiviral Agents; Carcinoma, Hepatocellular; Chemoembolization, Therapeutic; Cohort Studies; Female; Hepatitis C; Humans; Liver Neoplasms; Male; Middle Aged; Retrospective Studies; antivirus agent; doxorubicin; gelatin sponge; interferon; iodinated poppyseed oil; adult; aged; antiviral therapy; Article; cancer growth; cancer patient; cancer size; cancer survival; chemoembolization; chronic hepatitis C; cohort analysis; controlled study; female; human; incidence; liver cell carcinoma; liver cirrhosis; major clinical study; male; middle aged; mortality risk; multicenter study; overall survival; portal vein thrombosis; progression free survival; retrospective study; sustained virologic response; treatment outcome; viral clearance; chemoembolization; clinical trial; complication; hepatitis C; liver cell carcinoma; liver tumor; procedures | English | 2021 | 2021-07 | 10.1007/s10620-020-06533-7 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Low Bone Mineral Density in Young Patients Newly Diagnosed with Inflammatory Bowel Disease | Background The prevalence and risk factors of low bone mineral density (BMD) in Asian patients newly diagnosed with inflammatory bowel disease (IBD) have not been fully suggested. Aims We aimed to examine the prevalence and risk factors of low BMD in young Korean patients newly diagnosed with IBD. Methods We prospectively enrolled 132 patients aged less than 50 years and newly diagnosed with IBD from six tertiary referral centers in Korea between November 2014 and April 2017. BMD was measured by dual-energy X-ray absorptiometry, and then the Z-score was determined. We defined low BMD as a Z-score = 140 U/L) (P = 0.010) in UC patients, and being underweight (body mass index <= 18.5 kg/m(2)) (P = 0.017) in CD patients. Conclusions Our study showed that about one-third of newly diagnosed IBD Asian patients had low BMD. The clinical factors associated with low BMD were a high level of ALP in UC patients, and being underweight, in CD patients. Therefore, measurements of BMD in young patients should be considered at the diagnosis of IBD. | Lee, Joon Seop; Lee, Hyun Seok; Jang, Byung Ik; Kim, Eun Soo; Kim, Sung Kook; Kim, Kyeong Ok; Lee, Yoo Jin; Lee, Hyun Jik; Kim, Eun Young; Lung, Yun Jin; Yang, Chang Heon | Kyungpook Natl Univ, Kyungpook Natl Univ Hosp, Sch Med, Dept Internal Med, 807 Hokuk Ro, Daegu 41404, South Korea; Yeungnam Univ, Dept Internal Med, Coll Med, Daegu, South Korea; Keimyung Univ, Dept Internal Med, Sch Med, Daegu, South Korea; Catholic Univ Daegu, Dept Internal Med, Sch Med, Daegu, South Korea; Fatima Hosp Daegu, Dept Internal Med, Daegu, South Korea; Dongguk Univ, Dept Internal Med, Sch Med, Gyeongju, South Korea | ; Lee, Yoojin/AAB-9799-2022; Kwak, Sang Gyu/AAG-4341-2021; Kim, Eun Young/JCE-3602-2023 | 57205374013; 36647886100; 22953491400; 57203086704; 34770060400; 53363798100; 55531365900; 59107095100; 58889004100; 56949639800; 23089577400 | lhsworld@nate.com; | DIGESTIVE DISEASES AND SCIENCES | DIGEST DIS SCI | 0163-2116 | 1573-2568 | 66 | 2 | SCIE | GASTROENTEROLOGY & HEPATOLOGY | 2021 | 3.487 | 60.8 | 0.7 | 2025-07-30 | 8 | 8 | Inflammatory bowel disease; Bone mineral density; Ulcerative colitis; Crohn's disease | FRACTURE RISK; CROHNS-DISEASE; OSTEOPOROSIS; PREVALENCE | Bone mineral density; Crohn’s disease; Inflammatory bowel disease; Ulcerative colitis | Absorptiometry, Photon; Adult; Bone Density; Bone Diseases, Metabolic; Female; Humans; Inflammatory Bowel Diseases; Male; Prospective Studies; Republic of Korea; Risk Factors; Young Adult; alkaline phosphatase; adult; Article; Asian; body mass; bone density; Crohn disease; data analysis software; dual energy X ray absorptiometry; female; femoral neck; femur; human; Korean (people); major clinical study; male; prevalence; priority journal; prospective study; risk factor; spine; ulcerative colitis; underweight; bone density; diagnostic imaging; inflammatory bowel disease; metabolic bone disease; photon absorptiometry; physiology; procedures; South Korea; young adult | English | 2021 | 2021-02 | 10.1007/s10620-020-06220-7 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Masked observation for majority-based control of a democratic progress model in the framework of discrete event systems | This paper addresses a simple democratic progress model represented by a discrete-event system (DES) and the influence of information accessibility on the progressiveness of the model. Each agent makes a decision according to its selfish criterion, and the final decision for the progress or regression of the system is done by the majority rule based on individual decisions of agents. We first present the conditions for the closed-loop system to be progressive or regressive under full observation where every agent can observe all the states. Then we focus on the masked observation problem, namely, whether the progressiveness of the closed-loop behavior can be changed by restricting the information accessibility of agents that are characterized by their masks. Especially, we show that due to the elite class, the regressive closed-loop system can never be transformed into progressive regardless of mask design, which conforms to the feature of modern democracy. | Park, Seong-Jin; Yang, Jung-Min | Ajou Univ, Dept Elect & Comp Engn, Suwon 16499, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea | 57188837512; 57208450551 | jmyang@ee.knu.ac.kr; | ASIAN JOURNAL OF CONTROL | ASIAN J CONTROL | 1561-8625 | 1934-6093 | 23 | 5 | SCIE | AUTOMATION & CONTROL SYSTEMS | 2021 | 2.444 | 60.8 | 0 | 2025-07-30 | 0 | 0 | automaton; democracy; discrete event systems (DESs); masked observation; supervisory control | MODULAR SUPERVISORY CONTROL; ECONOMIC-INEQUALITY; DESIGN | automaton; democracy; discrete event systems (DESs); masked observation; supervisory control | Closed loop systems; Closed-loop behavior; Final decision; Information accessibility; Majority rule; Mask design; Discrete event simulation | English | 2021 | 2021-09 | 10.1002/asjc.2353 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | The Development of a Mobile Application for Older Adults for Rehabilitation Instructions After Hip Fracture Surgery | Introduction: Older patients with hip fractures require a long time to rehabilitate and recover after surgery. Although effective discharge instructions for long-term recovery are important, the discharge instructions of most acute-care hospitals are often presented as a brochure, which is difficult for older adults to follow. The purpose of this study was to develop rehabilitation instructions in the form of a mobile application for the physical recovery of older adults after hip fracture surgery. Materials and Methods: A mobile application for rehabilitation instructions after hip fracture surgery was developed in ADDIE order of analysis, design, development, implementation, and evaluation. The contents of the mobile application composed of rehabilitative exercises, activities of daily living, pain and nutrition management, fall prevention, and hospital visits. Nine experts evaluated the application and SPSS version 23.0 program was used for data analysis. Results: In the mobile application evaluation by the experts, the average score of the contents was 2.22 out of 3 points. The average score of understanding was the highest at 2.42, while accuracy was the lowest at 2.00 in the contents. The average score of the interface design was 2.32 out of 3 points. The average score of consistency was the highest at 2.42, while design suitability was the lowest at 2.25 in the interface design. The experts perceived the mobile application as simple and easy to understand while also suggesting some improvements. Conclusion: The average scores were highest for understanding of contents and consistency of the interface design and lowest for accuracy of contents and design suitability of the interface design. The mobile application was easy to understand and had consistency in design. | Ko, YoungJi; Hwang, Jong-Moon; Baek, Seung-Hoon | Kyungpook Natl Univ, Dept Orthoped Surg, Kyungpook Natl Univ Hosp, Sch Med, Daegu, South Korea; Kyungpook Natl Univ, Dept Rehabil Med, Kyungpook Natl Univ Hosp, Sch Med, Daegu, South Korea | Ko, YoungJi/ABD-6413-2020 | 57209233650; 56367634000; 56232924900 | yjko@dhu.ac.kr; | GERIATRIC ORTHOPAEDIC SURGERY & REHABILITATION | GERIATR ORTHOP SURG | 2151-4585 | 2151-4593 | 12 | SCIE | GERIATRICS & GERONTOLOGY;ORTHOPEDICS;REHABILITATION;SURGERY | 2021 | 1.924 | 61.0 | 0.68 | 2025-07-30 | 2 | 5 | older adults; hip fracture; mobile applications; rehabilitation; education | DISCHARGE INSTRUCTIONS; EFFICACY; PROGRAM | education; hip fracture; mobile applications; older adults; rehabilitation | Article; Barthel index; daily life activity; exercise; grip strength; hip fracture; human; mobile application; nutrition; pain; pain intensity; physical activity; remission | English | 2021 | 2021-03-25 | 10.1177/21514593211006693 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Four-phase interleaved TCM DC-DC buck converter with matrix inductor in battery charging application | In this paper, a 1-kW DC-DC buck converter with a four-phase interleaved matrix inductor is proposed for battery charging applications. It is well-known that the DC bias on the inductor will cause high core loss as it changes the B-H characteristic. Typically, the transient conduction mode employed in high voltage applications for zero-voltage-switching of devices would cause higher inductor current ripple. The conventional approach to reduce the effect of DC bias and inductor current ripple is employing multi-phases. However, the cost and size of the converter will increase significantly. This paper proposes the matrix inductor which has a small volume and reduces the effect of the DC bias by flux sharing and flux cancellation at the same time, results in low inductor core loss. With the interleaved operations the output current ripple can be lower which is suitable for battery charging application. Besides, the comparison of the synchronous and interleaved operation is presented. A 1-kW prototype is built and the experimental results show that the peak efficiency is 99.1% and 99.2% for synchronous and interleaved control, respectively. Additionally, the output current ripple of the interleaved operation is reduced by 85% in comparison with the synchronous operation. | Nguyen, Anh Dung; Chen, Shu-Xin; Chen, Yang; Chen, Cheng-Wei; Han, Byeongcheol; Lai, Jih-Sheng | Virginia Tech, Future Energy Elect Ctr, Bradley Dept Elect & Comp Engn, 220 Invent Ln, Blacksburg, VA 24061 USA; Nanyang Technol Univ, Dept Elect & Elect Engn, 50 Nanyang Ave, Singapore 639798, Singapore; Southwest Jiaotong Univ, Sch Elect Engn, West Sect, Chengdu 611756, Sichuan, Peoples R China; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea | ; Lai, Jih-Sheng/I-1762-2016; Chen, Yang/L-8171-2019; Chen, Shuxin/AAN-3748-2021; Han, Byeongcheol/W-7608-2019; Nguyen, Anh/HTO-8740-2023 | 57189692069; 57195586297; 56540441700; 57208657219; 57188622752; 56493805300 | adnguyen@vt.edu; | IET POWER ELECTRONICS | IET POWER ELECTRON | 1755-4535 | 1755-4543 | 14 | 1 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC | 2021 | 2.112 | 61.4 | 0.56 | 2025-07-30 | 5 | 8 | BOOST CONVERTER; MODE; ACCURATE; LOSSES | Bias voltage; Buck converter; Electric inductors; HVDC power transmission; Secondary batteries; Zero voltage switching; Core loss; DC bias; DC-DC buck converter; Four-phase; Inductor current ripples; Interleaved operations; matrix; Output current; Synchronous operations; Charging (batteries) | English | 2021 | 2021-01 | 10.1049/pel2.12017 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Effect of Source-Drain Electric Field on Charge Transport Mechanism in Polymer-Based Thin-Film Transistors | Donor-acceptor copolymer-based field-effect transistors (FETs) have attracted considerable attention from technological and academic perspectives due to their low band gap, high mobility, low cost, and easy solution processability, flexibility, and stretch ability. Among different solution-processing techniques, meniscus-guided coating has the potential for large-area film formation. Moreover, 29-diketopyrrolopyrroleselenophene vinylene selenophene (29-DPP-SVS) donor-acceptor copolymer-based FETs have already exhibited excellent performance due to their short pi-pi stacking distance and strong pi-pi interaction. Charge carrier mobility of these types of semiconducting materials is significantly dependent on the applied electric field. Therefore, detailed analysis of the electric-field dependency of charge carrier mobility is necessary to understand the transport mechanisms within these materials. Thus, herein, 29-DPP-SVS-based FETs are fabricated by varying the blade-coating speed of their semiconductor layer. Then, the effect of the blade-coating speed on the electrical properties of the FETs is studied through the analysis of electric-field-dependent mobility. The results suggest that the charge carrier mobility of different FETs is dependent on the applied electric field and that the type of dependency is Poole-Frenkel. At an optimized blade-coating speed (2 mm s(-1)), the device exhibits maximum zero-field mobility (3.39 cm(2) V-1 s(-1)) due to the low trap density within the conducting channel. | Biswas, Swarup; Seo, Kyeong-Ho; Lee, Yongju; Kim, Yun-Hi; Bae, Jin-Hyuk; Kim, Hyeok | Univ Seoul, Sch Elect & Comp Engn, Inst Informat Technol, 163 Seoulsiripdaero, Seoul 02504, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, 80 Daehakro, Daegu 41566, South Korea; Korea Inst Ind Technol KITECH, Appl Robot R&D Dept, Ansan 15588, South Korea; Gyeongsang Natl Univ, Dept Chem, Jinju 52828, South Korea; Gyeongsang Natl Univ, Res Inst Nat Sci, Jinju 52828, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea | Biswas, Swarup/AAH-5067-2019; Kim, Yun-Hi/AAP-1769-2021 | 7402251506; 57211978931; 58552016200; 56066944400; 35326180700; 57191718658 | jhbae@ee.knu.ac.kr;hyeok.kim@uos.ac.kr; | PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | PHYS STATUS SOLIDI A | 1862-6300 | 1862-6319 | 218 | 16 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER | 2021 | 2.17 | 61.6 | 0.29 | 2025-07-30 | 4 | 4 | blade coating; field-dependent mobilities; organic polymer semiconductors; Poole– Frenkel law; thin-film transistors | UNIAXIAL ALIGNMENT; MOBILITY; PERFORMANCE; PENTACENE; COPOLYMER; THICKNESS | blade coating; field-dependent mobilities; organic polymer semiconductors; Poole–Frenkel law; thin-film transistors | Electric fields; Energy gap; Hall mobility; Hole mobility; Plastic coatings; Thin film circuits; Thin film transistors; Analysis of electric fields; Charge transport mechanisms; Donor-acceptor copolymers; Electric field dependencies; Field effect transistor (FETs); Semiconducting materials; Semiconductor layers; Solution processability; Field effect transistors | English | 2021 | 2021-08 | 10.1002/pssa.202000753 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Letter | Fabrication and evaluation of molecularly imprinted structured polymeric films via photopolymerization for bisphenol A detection | Molecularly imprinted polymers (MIPs) are a promising technology for sensing specific analytes. Structured MIP-coated quartz crystal microbalance sensors were developed for the detection of bisphenol A (BPA) using 2-dimethylaminoethyl methacrylate (DMAEMA) as a functional monomer. A simple unidirectional rubbing technique and a soft lithographic technique were used to fabricate convex hemispherical and hierarchical hemispherical MIP patterns, including a planar MIP film as a control. The two structured MIP films exhibited relatively higher imprinting factors and sensitivities compared with the planar MIP film and the selectivity coefficients of the structured MIP films were slightly increased due to the MIP structuring effect. | Goo, Seung Hyo; Velhal, Ninad B.; Park, Jinyoung | Kyungpook Natl Univ, Sch Appl Chem Engn, 80 Daehak Ro, Daegu 41566, South Korea; Kyungpook Natl Univ, Dept Polymer Sci & Engn, 80 Daehak Ro, Daegu 41566, South Korea | Velhal, Ninad/O-2578-2014; PARK, JUN-YOUNG/P-5981-2015 | 57250247000; 56116686900; 57286293400 | jinpark@knu.ac.kr; | MRS COMMUNICATIONS | MRS COMMUN | 2159-6859 | 2159-6867 | 11 | 5 | SCIE | MATERIALS SCIENCE, MULTIDISCIPLINARY | 2021 | 2.935 | 61.6 | 0.26 | 2025-07-30 | 2 | 2 | PARTICLES | Adsorption; Hierarchical; Kinetics; Lithography; Polymerization | English | 2021 | 2021-10 | 10.1557/s43579-021-00077-1 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Transcranial Alternating Current Stimulation Reduces Network Hypersynchrony and Persistent Vertigo | Objectives Persistent oscillating vertigo that occurs after entrainment to periodic motion is known as Mal de Debarquement Syndrome (MdDS). Down-modulation of this oscillating vertigo is associated with reduction in long-range resting-state functional connectivity between fronto-parieto-occipital regions. In order to determine the association between this oscillating vertigo and hypersynchrony as measured by the auditory steady-state response (ASSR), we investigated the differences in ASSR between individuals with MdDS and healthy controls as well as the change in ASSR in individuals with MdDS before and after treatment with transcranial alternating current stimulation (tACS). Materials and Methods Individuals with treatment refractory MdDS lasting at least six months received single administrations of fronto-parieto-occipital tACS in an "n-of-1" double-blind randomized design: alpha-frequency in-phase, alpha-frequency antiphase, and gamma frequency antiphase control. The treatment protocol that led to the most acute reduction in symptoms and improved balance was administered for 10-12 sessions given over three days (each session 20-min at 2-4 mA). Results Twenty-four individuals with MdDS participated (mean age 53.0 +/- 11.8 years [range: 22-66 years, median: 57.0 years]; mean duration of illness 38.6 +/- 53.4 months [range: 6-240 months, median: 18.0 months]). Individuals with MdDS had elevated ASSR compared to healthy controls at baseline (t(11) = 5.95, p < 0.001). There was a significant decrease in the 40 Hz-ASSR response between responders compared to nonresponders to tACS (t-test, t(15) = -2.26, p = 0.04). Both in-phase and anti-phase alpha tACS lead to symptom improvement but only antiphase alpha-tACS led to a significant decrease of 40 Hz-ASSR (t-test, t(12) = -9.6, p < 0.001). Conclusions Our findings suggest that tACS has the potential to reduce network-level hypersynchrony and pathological susceptibility to entrainment by sensory input. To the best of our knowledge, this is the first successful demonstration of desynchronization by noninvasive brain stimulation leading to reduced vertigo. Other disease states associated with pathological functional coupling of neuronal networks may similarly benefit from this novel approach. | Ahn, Sangtae; Gleghorn, Diamond; Doudican, Benjamin; Frohlich, Flavio; Cha, Yoon-Hee | Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu, South Korea; Univ North Carolina Chapel Hill, Carolina Ctr Neurostimulat, Chapel Hill, NC USA; Univ North Carolina Chapel Hill, Dept Psychiat, Chapel Hill, NC USA; Missouri State Univ, Phys Assistant Studies Dept, Springfield, MO USA; Univ Minnesota, Dept Neurol, Minneapolis, MN 55455 USA; Univ North Carolina Chapel Hill, Dept Neurol, Chapel Hill, NC USA; Univ North Carolina Chapel Hill, Dept Biomed Engn, Chapel Hill, NC USA; Univ North Carolina Chapel Hill, Dept Cell Biol & Physiol, Chapel Hill, NC USA; Univ North Carolina Chapel Hill, Neurosci Ctr, Chapel Hill, NC USA; Laureate Inst Brain Res, Tulsa, OK USA | ; Frohlich, Flavio/P-6429-2017; Ahn, Sangtae/AFQ-7342-2022 | 55468016100; 57197713662; 57203483172; 57204276548; 56104862400 | ycha@umn.edu; | NEUROMODULATION | NEUROMODULATION | 1094-7159 | 1525-1403 | 24 | 5 | SCIE | CLINICAL NEUROLOGY;MEDICINE, RESEARCH & EXPERIMENTAL | 2021 | 3.025 | 61.6 | 0.61 | 2025-07-30 | 9 | 8 | Auditory steady‐ state response; Mal de Dé barquement Syndrome; persistent oscillating vertigo; transcranial alternating current stimulation | STEADY-STATE RESPONSE; MAGNETIC STIMULATION; ENTORHINAL CORTEX; OSCILLATIONS; ENTRAINMENT; BRAIN; TACS; CONNECTIVITY; DISORDER | Auditory steady-state response; Mal de Débarquement Syndrome; persistent oscillating vertigo; transcranial alternating current stimulation | Humans; Middle Aged; Neurons; Occipital Lobe; Transcranial Direct Current Stimulation; Vertigo; adult; aged; aging; Article; auditory system function; clinical article; clinical protocol; comparative study; controlled study; double blind procedure; female; frontoparietal cortex; human; Mal de Debarquement syndrome; male; parieto-occipital sulcus; pathology; randomized controlled trial; sensory stimulation; steady state; transcranial alternating current stimulation; treatment duration; treatment response; vertigo; middle aged; nerve cell; occipital lobe; transcranial direct current stimulation; vertigo | English | 2021 | 2021-07 | 10.1111/ner.13389 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Stuck fragment of totally implantable central venous access ports during removal: risk factor analysis in children | BackgroundTotally implantable central venous access ports (TICVAPs) have increasingly been used in pediatric patients because they provide reliable venous access. However, many complications associated with TICVAPs have been reported. Here, we aimed to analyze the risk factors of stuck fragment of TICVAPs during removal in children and recommend the appropriate periods of use or exchange.MethodsWe retrospectively reviewed the medical records of 121 patients, including 147 cases of TICVAP insertion, between January 2010 and July 2020.ResultsAmong these, 98 cases in 72 patients involved of TICVAP removal, with 8 patients having had incomplete TICVAP removal resulting in a stuck fragment of the catheter in the central venous system (Group S). All Group S patients were male and had acute leukemia, and their TICVAPs were used for chemotherapy. Compared with the complete removal group (Group N), stuck fragment in Group S were significantly found in patients diagnosed with acute leukemia than those with other diagnoses (p<0.001). Indwelling duration and body weight change during TICVAP indwelling were significantly longer and larger in Group S, respectively (p<0.001). In multivariate logistic regression analysis, indwell duration (odds ratio [OR], 1.13; 95% confidence interval [Cl] 1.02-1.37, p=0.10), body weight change during indwell (OR, 1.00; 95% Cl 0.83-1.18, p=0.97), and platelet count at TICVAP insertion (OR, 0.98; 95% Cl 0.95-0.99; p=0.48) showed an increased trend of risk for a stuck catheter.ConclusionsWe suggest prophylactic catheter exchange before indwell duration of 46 months (area under the curve [AUC], 0.949; 95% Cl 0.905-0.993) and body weight change up to 9.9 kg (AUC, 0.903; 95% Cl 0.840-0.966) to prevent a catheter from becoming stuck, especially in children with rapidly growing acute leukemia. Management of a stuck fragment remains controversial in asymptomatic patients, and we suggest careful, close observation rather than aggressive and invasive treatment. | Jung, Hanna; Cho, Joon Yong; Seok, Yangki; Lee, Youngok | Kyungpook Natl Univ, Sch Med, Dept Thorac & Cardiovasc Surg, Kyungpook Natl Univ Hosp, Daegu 41944, South Korea; Soonchunhyang Univ, Dept Thorac & Cardiovasc Surg, Gumi Hosp, Gumi 39371, South Korea | Jung, Hanna/Y-4165-2019 | 56467570700; 57195637434; 37052883000; 36461117600 | yolee1210@knu.ac.kr; | BMC SURGERY | BMC SURG | 1471-2482 | 21 | 1 | SCIE | SURGERY | 2021 | 2.03 | 61.7 | 0.33 | 2025-07-30 | 3 | 3 | Child; Risk factor; Vascular access ports | PINCH-OFF SYNDROME; CATHETER; COMPLICATIONS; RETRIEVAL; CHEMOPORT; DEVICE | Child; Risk factor; Vascular access ports | Catheterization, Central Venous; Catheters, Indwelling; Child; Device Removal; Factor Analysis, Statistical; Female; Humans; Male; Retrospective Studies; Risk Factors; adverse device effect; adverse event; central venous catheterization; child; device removal; factor analysis; female; human; indwelling catheter; male; retrospective study; risk factor | English | 2021 | 2021-06-02 | 10.1186/s12893-021-01271-7 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Dual Clarithromycin and Metronidazole Resistance Is the Main Cause of Failure in Ultimate Helicobacter pylori Eradication | Background/Aim: Antimicrobial resistance significantly affects the cure rate of Helicobacter pylori (H. pylori) eradication. We evaluated the risk factor of failure in ultimate H. pylori eradication and assessed the efficacy of current regimens to overcome antibiotic resistance. Methods: Patients with H. pylori infection were prospectively enrolled in a single center. They were classified into 3 groups according to the previous history of H. pylori eradication, and antibiotic susceptibility was evaluated by culture and minimum inhibitory concentrations (MICs). Results: Ninety-seven patients were successfully cultured for H. pylori and 81 (83.5%), 7 (7.2%), and 9 (9.3%) were classified into primary resistance, 1st eradication failure, and 2nd or more eradication failure groups; the resistance to clarithromycin (CLA), metronidazole (MET), and levofloxacin increased in the 1st eradication failure (85.7, 57.1, and 42.9%) and 2nd or more eradication failure (88.9, 88.9, and 55.6%) groups. The prevalence of MDR was 21.0% (17/81), 57.1% (4/7), and 88.9% (8/9) in the primary, 1st eradication failure, and 2nd or more eradication failure groups, respectively. In multivariate analysis, dual CLA/MET resistance (CLA/MET-R) (OR = 31.432, 95% CI: 3.094-319.266, p = 0.004) was an independent risk factor for ultimate H. pylori eradication failure. In patients with dual CLA/MET-R, the eradication ratio of concomitant therapy was 57.1% (4/7), whereas that of bismuth-containing quadruple therapy was 27.3% (3/11) (p = 0.350). Conclusions: Dual CLA/MET-R was the main cause of failure in ultimate H. pylori eradication, and 7-day bismuth quadruple or concomitant regimen would not be suitable for H. pylori eradication in the dual CLA/MET-R group. | Hwang, Ji Yong; Kim, Changho; Kwon, Yong Hwan; Lee, Ji Eun; Jeon, Seong Woo; Nam, Su Youn; Seo, An Na; Han, Man-Hoon; Park, Ji Hye | Kyungpook Natl Univ Hosp, Dept Internal Med, Daegu, South Korea; Kyungpook Natl Univ, Sch Med, Daegu, South Korea; Kyungpook Natl Univ Hosp, Dept Pathol, Daegu, South Korea | ; Jeon, Seongwoo/AAU-4618-2020 | 57249869000; 58259039200; 55775556800; 57249724700; 9733636500; 55617028500; 55804153700; 57194067936; 57250156800 | tear1480@hanmil.net;tear1480@hanmail.net; | DIGESTIVE DISEASES | DIGEST DIS | 0257-2753 | 1421-9875 | 39 | 5 | SCIE | GASTROENTEROLOGY & HEPATOLOGY | 2021 | 3.421 | 61.8 | 1.27 | 2025-07-30 | 14 | 14 | Helicobacter pylori; Drug resistance; Antimicrobial resistance; Clarithromycin; Metronidazole | TRIPLE-THERAPY; CONCOMITANT; EFFICACY; REGIMEN | Antimicrobial resistance; Clarithromycin; Drug resistance; Helicobacter pylori; Metronidazole | Anti-Bacterial Agents; Bismuth; Clarithromycin; Drug Resistance, Bacterial; Drug Therapy, Combination; Helicobacter Infections; Helicobacter pylori; Humans; Metronidazole; Proton Pump Inhibitors; amoxicillin; bismuth; clarithromycin; immunoglobulin G; levofloxacin; metronidazole; oligonucleotide; tetracycline; antiinfective agent; clarithromycin; metronidazole; proton pump inhibitor; adult; adult,human; aged; antibiotic resistance; antibiotic sensitivity; antiretroviral therapy; Article; bacterium culture; bacterium isolation; controlled study; diabetes mellitus; disk diffusion; female; follow up; gastrectomy; gene mutation; Helicobacter infection; Helicobacter pylori; histopathology; human; major clinical study; male; middle aged; minimum inhibitory concentration; nonhuman; pathogen clearance; polymerase chain reaction; prevalence; risk assessment; risk factor; salvage therapy; stomach cancer; transurethral resection; very elderly; antibiotic resistance; combination drug therapy; Helicobacter infection | English | 2021 | 2021-09 | 10.1159/000514278 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Clinical Implication of 'Obesity Paradox' in Elderly Patients With Acute Myocardial Infarction | Background The clinical impact of body mass index (BMI), especially in the elderly with acute myocardial infarction (AMI), has not been sufficiently evaluated. The purpose of this study was to elucidate the clinical impact BMI in very old patients (>80 years) with AMI. Methods The study analysed 2,489 AMI patients aged >80 years from the Korea Acute Myocardial Infarction Registry and the Korea Working Group on Myocardial Infarction (KAMIR/KorMI) registries between November 2005 and March 2012. The study population was categorised into four groups based on their BMI: underweight (n=301), normal weight (n=1,150), overweight (n=890), and obese (n=148). The primary endpoint was major adverse cardiovascular event (MACE), a composite of cardiac death, myocardial infarction, target lesion revascularisation, and target vessel revascularisation. Results Baseline characteristics among the four groups were similar, except for hypertension (45.1 vs 58.4 vs 66.2 vs 69.9%, respectively; p27.5 kg/m(2)) as an independent predictor of reduced MACE (hazard ratio [HR], 0.20; 95% confidence interval [CI], 0.06-0.69; p=0.010) along with reduced left ventricular ejection fraction (<40%) as a predictor of increased MACE (HR,1.87; 95% CI, 1.31-2.68; p=0.001). Conclusion Body mass index in elderly patients with acute myocardial infarction was significantly associated with coronary care unit stay and clinical cardiovascular outcomes. | Kim, Hun-Tae; Jung, Sung-Yun; Nam, Jong-Ho; Lee, Jung-Hee; Lee, Chan-Hee; Son, Jang-Won; Kim, Ung; Park, Jong-Seon; Shin, Dong-Gu; Her, Sung-Ho; Chang, Ki-yuk; Ahn, Tae-Hoon; Jeong, Myung-Ho; Rha, Seung-Woon; Kim, Hyo-Soo; Gwon, Hyeon-Cheol; Seong, In-Whan; Hwang, Kyung-Kuk; Chae, Sung-Chull; Kim, Kwon-Bae; Cha, Kwang-Soo; Oh, Seok-Kyu; Chae, Jei-Keon | Yeungnam Univ, Med Ctr, Div Cardiol, Daegu 42415, South Korea; Dongkang Med Ctr, Div Cardiol, Ulsan, South Korea; Catholic Univ Korea, Daejeon St Marys Hosp, Daejeon, South Korea; Catholic Univ Korea, Seoul St Marys Hosp, Seoul, South Korea; Gachon Univ, Gil Med Ctr, Incheon, South Korea; Chonnam Natl Univ Hosp, Gwangju, South Korea; Korea Univ, Guro Hosp, Seoul, South Korea; Seoul Natl Univ Hosp, Seoul, South Korea; Sungkyunkwan Univ, Samsung Med Ctr, Seoul, South Korea; Chungnam Natl Univ Hosp, Daejeon, South Korea; Chungbuk Natl Univ Hosp, Cheongju, South Korea; Kyungpook Natl Univ Hosp, Daegu, South Korea; Keimyung Univ, Dongsan Med Ctr, Daegu, South Korea; Pusan Natl Univ Hosp, Busan, South Korea; Wonkwang Univ Hosp, Iksan, South Korea; Chonbuk Natl Univ Hosp, Jeonju, South Korea | ; Rha, Seung-Woon/AGE-5810-2022; Kim, Sang-Hyun/J-5402-2012; 안, 태훈/GON-9067-2022 | 57218189359; 57219310298; 57206259132; 55969086000; 36045642800; 36646742500; 35226439300; 15763054600; 14045949300; 12806475600; 25521288100; 57202554645; 56485157500; 8569030400; 33567809200; 6603262426; 35254371300; 7402426370; 59804761300; 8319343800; 7102837700; 24734336000; 26029709000 | woongwa@yu.ac.kr; | HEART LUNG AND CIRCULATION | HEART LUNG CIRC | 1443-9506 | 1444-2892 | 30 | 4 | SCIE | CARDIAC & CARDIOVASCULAR SYSTEMS | 2021 | 2.838 | 61.9 | 0.74 | 2025-07-30 | 10 | 10 | Myocardial infarction; Age >= 80 years; Body mass index; Cardiovascular outcome | Age ≥80 years; Body mass index; Cardiovascular outcome; Myocardial infarction | Aged; Humans; Myocardial Infarction; Obesity; Percutaneous Coronary Intervention; Registries; Stroke Volume; Treatment Outcome; Ventricular Function, Left; acute heart infarction; aged; Article; body mass; cardiovascular disease; diabetes mellitus; female; hazard ratio; heart death; heart left ventricle ejection fraction; human; hypertension; length of stay; major clinical study; male; obesity; priority journal; retrospective study; target lesion revascularization; underweight; very elderly; complication; heart infarction; heart left ventricle function; heart stroke volume; obesity; percutaneous coronary intervention; register; treatment outcome | English | 2021 | 2021-04 | 10.1016/j.hlc.2020.08.013 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | QUADRATIC KILLING NORMAL JACOBI OPERATOR FOR REAL HYPERSURFACES IN THE COMPLEX QUADRIC | We introduce the notion of quadratic Killing normal Jacobi operator (simply, Killing normal Jacobi operator) and its geometric meaning for real hypersurfaces in the complex quadric. In addition, we give a nonexistence theorem for Hopf real hypersurfaces with quadratic Killing normal Jacobi operator in the complex quadric. | Lee, Hyunjin; Suh, Young Jin | Kyungpook Natl Univ, Res Inst Real & Complex Manifolds, Daegu, South Korea; Kyungpook Natl Univ, Dept Math, Daegu, South Korea | 55706812200; 7202260479 | lhjibis@hanmail.net;yjsuh@knu.ac.kr; | ROCKY MOUNTAIN JOURNAL OF MATHEMATICS | ROCKY MT J MATH | 0035-7596 | 1945-3795 | 51 | 4 | SCIE | MATHEMATICS | 2021 | 0.813 | 62.0 | 0.22 | 2025-07-30 | 1 | 1 | Killing tensor; quadratic Killing tensor; cyclic parallelism; normal Jacobi operator; singular normal vector; A-isotropic; A-principal; complex structure; real structure; Hopf real hypersurface; complex quadric | GENERALIZED TANAKA-WEBSTER; 2-PLANE GRASSMANNIANS | A-isotropic; A-principal; Complex quadric; Complex structure; Cyclic parallelism; Hopf real hypersurface; Killing tensor; Normal Jacobi operator; Quadratic Killing tensor; Real structure; Singular normal vector | English | 2021 | 2021-08 | 10.1216/rmj.2021.51.1281 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Improving the Thermal Stability and Oxidation Resistance of Silver Nanowire Films via 2-Mercaptobenzimidazole Modification | For electronic devices, a tradeoff exists between the structural stability and electrical conductivity of silver nanowires (Ag NWs). Self-assembled monolayers (SAMs) containing sulfur functional groups formed on the Ag nanowire surface through Ag-S covalent bonds can act as a passivation layer, thereby improving the corrosion resistance. This work explored the effect of 2-mercaptobenzimidazole (MBI) SAM on the thermal and oxidation resistance of Ag NW films. The conductivity, surface morphology, chemical properties, and thermal stability of MBI-modified Ag NW films were analyzed via four-point probe measurements, field-emission scanning electron microscopy, x-ray photoelectron spectroscopy (XPS), and thermal characterization. In particular, the results show that the MBI layer can significantly reduce the oxidation of Ag NW films at room temperature for 60 days. Moreover, the MBI layer improved the thermal stability of the Ag NW films up to 230 degrees C by inhibiting Ag diffusion. The unmodified Ag NW film completely lost conductivity after heating and oxidation treatment. In contrast, the sheet resistance of the Ag NW film modified by 0.1 wt.% MBI only increased from 65 Omega/square to 106 Omega/square, and 156 Omega/square after heating treatment and oxidation test, respectively. | Ma, Junfei; Kim, Ji-Hyeon; Lee, Ga Hyun; Jo, Sungjin; Kim, Chang Su | Korea Inst Mat Sci KIMS, Dept Nanobio Convergence, 797 Changwondaero, Chang Won 51508, South Korea; Kyungpook Natl Univ, Sch Architectural Civil Environm & Energy Engn, 80 Daehakro, Daegu 41566, South Korea | ; Kim, Donghee/C-4288-2013 | 57207769424; 57210338058; 57215123354; 7101724027; 57201346735 | ready@kims.re.kr;sangdu87@kims.re.kr;gaataan2@kims.re.kr;sungjin@knu.ac.kr;cskim1025@kims.re.kr; | JOURNAL OF ELECTRONIC MATERIALS | J ELECTRON MATER | 0361-5235 | 1543-186X | 50 | 8 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2021 | 2.047 | 62.1 | 0.31 | 2025-07-30 | 8 | 8 | Silver nanowire; 2-mercaptobenzimidazole; oxidation resistance; transparent conductive film; thermal stability; self-assembled monolayers | ORGANIC SOLAR-CELLS; OXIDE THIN-FILMS; TRANSPARENT ELECTRODE; RAYLEIGH-INSTABILITY; HIGHLY TRANSPARENT; COPPER; BENZOTRIAZOLE; CONDUCTIVITY; NANOSCALE; CORROSION | 2-mercaptobenzimidazole; oxidation resistance; self-assembled monolayers; Silver nanowire; thermal stability; transparent conductive film | Chemical analysis; Chemical stability; Electric resistance measurement; Field emission microscopes; Morphology; Oxidation; Oxidation resistance; Passivation; Scanning electron microscopy; Silver metallography; Silver nanowires; Surface morphology; Thermodynamic stability; X ray photoelectron spectroscopy; 2-mercapto-benzimidazole; Electrical conductivity; Field emission scanning electron microscopy; Four-point probe measurements; Heating treatments; Oxidation treatments; Structural stabilities; Thermal characterization; Silver | English | 2021 | 2021-08 | 10.1007/s11664-021-09018-z | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Synthesis and Thermoelectric Properties of ZrxTi1-xNiSn0.98Sb0.02n-Type Half-Heusler Materials | Hf-free ZrxTi1-xNiSn0.98Sb0.02 (x = 0.25, 0.5, 0.75) n-type half-Heusler (HH) thermoelectric materials were synthesized by a serial processing method including induction melting (IM), annealing, ball milling, and spark plasma sintering (SPS). For comparison, a Hf-containing half-Heusler Hf0.25Zr0.25Ti0.5NiSn0.98Sb0.02 ingot was also alloyed by arc melting, and the effects of Hf on the thermoelectric properties were estimated. The ZrxTi1-xNiSn0.98Sb0.02 HH materials were nearly pure according to the x-ray diffraction analysis, but microscopic investigation revealed impurity phase inclusions of unalloyed Sn, Zr, and Ti. The power factor (PF) of the Hf-free HH materials reached the maximum value of 4.31 mWm(-1) K-2 at 823 K in Zr0.75Ti0.25NiSn0.98Sb0.02, which was higher than Hf0.25Zr0.25Ti0.5NiSn0.98Sb0.02 (4.01 mWm(-1) K-2 at 773 K) in this study. However, the thermal conductivity of the Hf-free samples was significantly higher, by which the maximum dimensionless figure of merit was slightly lower (ZT(max) = 0.92 in Zr0.75Ti0.25NiSn0.98Sb0.02 at 873 K) than that of Hf0.25Zr0.25Ti0.5NiSn0.98Sb0.02 (ZT(max) = 1.03 at 873 K). The thermal conductivity was decomposed into lattice and electronic contributions, and the possible correlation with Ni off-stoichiometry is discussed. | Joo, Sung-Jae; Son, Ji-Hee; Lee, Ho Seong; Jang, Jeongin; Kim, Bong-Seo; Min, Bok-Ki | Korea Electrotechnol Res Inst, Energy Convers Res Ctr, Chang Won 51543, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, 80 Daehak Ro, Daegu 41566, South Korea | Son, Ji-Hee/I-4942-2016 | 7101656619; 57190658425; 55706810400; 55336555600; 55338437600; 26664804800 | sj_joo@keri.re.kr; | JOURNAL OF ELECTRONIC MATERIALS | J ELECTRON MATER | 0361-5235 | 1543-186X | 50 | 7 | SCIE | ENGINEERING, ELECTRICAL & ELECTRONIC;MATERIALS SCIENCE, MULTIDISCIPLINARY;PHYSICS, APPLIED | 2021 | 2.047 | 62.1 | 0.23 | 2025-07-30 | 4 | 4 | Thermoelectric; half-Heusler; induction melting; ZrxTi1-xNiSn0.98Sb0.02; spark plasma sintering | FIGURE-OF-MERIT; ENHANCEMENT; (TI,ZR,HF)NISN; COMPOUND; HAFNIUM; BAND | half-Heusler; induction melting; spark plasma sintering; Thermoelectric; Zr<sub>x</sub>Ti<sub>1−x</sub>NiSn<sub>0.98</sub>Sb<sub>0.02</sub> | Ball milling; Hafnium alloys; Impurities; Melting; Spark plasma sintering; Thermal conductivity; Thermoelectric equipment; Thermoelectricity; Tin alloys; Tin metallography; Titanium metallography; X ray powder diffraction; Zircaloy; Zirconium metallography; Dimensionless figure of merit; Electronic contributions; Impurity phase; Induction melting; Power factors; Serial processing; Thermo-Electric materials; Thermoelectric properties; Titanium alloys | English | 2021 | 2021-07 | 10.1007/s11664-021-08938-0 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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