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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 | Investigation of Donor-like State Distributions in Solution-Processed IZO Thin-Film Transistor through Photocurrent Analysis | The density of donor-like state distributions in solution-processed indium-zinc-oxide (IZO) thin-film transistors (TFTs) is thoroughly analyzed using photon energy irradiation. This study focuses on quantitatively calculating the distribution of density of states (DOS) in IZO semiconductors, with a specific emphasis on their variation with indium concentration. Two calculation methods, namely photoexcited charge collection spectroscopy (PECCS) and photocurrent-induced DOS spectroscopy (PIDS), are employed to estimate the density of the donor-like states. This dual approach not only ensures the accuracy of the findings but also provides a comprehensive perspective on the properties of semiconductors. The results reveal a consistent characteristic: the Recombination-Generation (R-G) center energy ET, a key aspect of the donor-like state, is acquired at approximately 3.26 eV, irrespective of the In concentration. This finding suggests that weak bonds and oxygen vacancies within the Zn-O bonding structure of IZO semiconductors act as the primary source of R-G centers, contributing to the donor-like state distribution. By highlighting this fundamental aspect of IZO semiconductors, this study enhances our understanding of their charge-transport mechanisms. Moreover, it offers valuable insight for addressing stability issues such as negative bias illumination stress, potentially leading to the improved performance and reliability of solution-processed IZO TFTs. The study contributes to the advancement of displays and technologies by presenting further innovations and applications for evaluating the fundamentals of semiconductors. | Kim, Dongwook; Lee, Hyeonju; Ejderha, Kadir; Yun, Youngjun; Bae, Jin-Hyuk; Park, Jaehoon | Hallym Univ, Sch Informat Sci, Chunchon 24252, South Korea; Bingol Univ, Fac Sci & Arts, Dept Phys, TR-12000 Bingol, Turkiye; Hallym Univ, Sch Semicond<middle dot>Display Technol, Chunchon 24252, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea; Hallym Univ, Dept Elect Engn, Chunchon 24252, South Korea | ; Yun, Youngjun/A-4639-2009 | 57218666795; 57040032800; 34976449200; 26030144600; 35326180700; 55717156300 | d.kim@hallym.ac.kr;hjlee@hallym.ac.kr;kejderha@bingol.edu.tr;youngjun.yun@hallym.ac.kr;jhbae@ee.knu.ac.kr;jaypark@hallym.ac.kr; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 23 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 0.11 | 2025-06-25 | 1 | 1 | solution-processed IZO semiconductor; thin-film transistor; density of donor-like states; photo-excited carrier; photocurrent | DENSITY-OF-STATES; OXIDE; VOLTAGE; ILLUMINATION; TFTS | density of donor-like states; photo-excited carrier; photocurrent; solution-processed IZO semiconductor; thin-film transistor | English | 2023 | 2023-12 | 10.3390/nano13232986 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Long-term survival benefits of intrathecal autologous bone marrow-derived mesenchymal stem cells (Neuronata-R®: lenzumestrocel) treatment in ALS: Propensity-score-matched control, surveillance study | ObjectiveNeuronata-R (R) (lenzumestrocel) is an autologous bone marrow-derived mesenchymal stem cell (BM-MSC) product, which was conditionally approved by the Korean Ministry of Food and Drug Safety (KMFDS, Republic of Korea) in 2013 for the treatment of amyotrophic lateral sclerosis (ALS). In the present study, we aimed to investigate the long-term survival benefits of treatment with intrathecal lenzumestrocel. MethodsA total of 157 participants who received lenzumestrocel and whose symptom duration was less than 2 years were included in the analysis (BM-MSC group). The survival data of placebo participants from the Pooled-Resource Open-Access ALS Clinical Trials (PROACT) database were used as the external control, and propensity score matching (PSM) was used to reduce confounding biases in baseline characteristics. Adverse events were recorded during the entire follow-up period after the first treatment. ResultsSurvival probability was significantly higher in the BM-MSC group compared to the external control group from the PROACT database (log-rank, p < 0.001). Multivariate Cox proportional hazard analysis showed a significantly lower hazard ratio for death in the BM-MSC group and indicated that multiple injections were more effective. Additionally, there were no serious adverse drug reactions found during the safety assessment, lasting a year after the first administration. ConclusionThe results of the present study showed that lenzumestrocel treatment had a long-term survival benefit in real-world ALS patients. | Nam, Jae-Yong; Chun, Sehwan; Lee, Tae Yong; Seo, Yunjeong; Kim, Kwijoo; Park, Jinseok; Sung, Wonjae; Oh, Ki-Wook; Lee, Sanggon; Park, Jin-Sung; Oh, Juyeon; Chung, Kyung Cheon; An, Hyonggin; Chu, Hyeon Sik; Son, Bugyeong; Kim, Seung Hyun | CORESTEMCHEMON Inc, Cent Res Ctr, Seoul, South Korea; Kyung Hee Univ, Dept Biol, Seoul, South Korea; Chungbuk Natl Univ, Coll Pharm, Cheongju, South Korea; Hanyang Univ, Coll Med, Dept Neurol, Seoul, South Korea; Chung Ang Univ, Dept Neurol, Gwangmyeong Hosp, Gwangmyeong, South Korea; Kyungpook Natl Univ, Chilgok Hosp, Sch Med, Dept Neurol, Daegu, South Korea; Dankook Univ, Coll Nursing, Cheonan, South Korea; Bethesda Gospel Hosp, Dept Neurol, Yangsan, South Korea; Korea Univ, Dept Biostat, Coll Med, Seoul, South Korea; Hanyang Univ Hosp, Cell Therapy Ctr, Seoul, South Korea | KIM, Seung Hyun/T-5133-2017; Oh, Ki-wook/E-6996-2017 | 57696159500; 57210834815; 57205775062; 58195761300; 57696159600; 57202928365; 57225185701; 55337510100; 57219600016; 44061744500; 56623729800; 58195909700; 7202277445; 57202873933; 57862065000; 55911799500 | kimsh1@hanyang.ac.kr; | FRONTIERS IN AGING NEUROSCIENCE | FRONT AGING NEUROSCI | 1663-4365 | 15 | SCIE | GERIATRICS & GERONTOLOGY;NEUROSCIENCES | 2023 | 4.1 | 26.0 | 1.17 | 2025-06-25 | 7 | 8 | lenzumestrocel; amyotrophic lateral sclerosis; stem cell therapy; survival analysis; mesenchymal stem cell | AMYOTROPHIC-LATERAL-SCLEROSIS; STROMAL CELLS; TRANSPLANTATION; SAFETY; EFFICACY; DIAGNOSIS; CRITERIA; THERAPY | amyotrophic lateral sclerosis; lenzumestrocel; mesenchymal stem cell; stem cell therapy; survival analysis | lenzumestrocel; adult; amyotrophic lateral sclerosis; arachnoiditis; Article; autologous bone marrow transplantation; backache; bone marrow mesenchymal stem cell; bone pain; chill; clinical trial; coccydynia; coccydynia; constipation; controlled study; coughing; demographics; diarrhea; disease duration; disease surveillance; dizziness; drug efficacy; dyspepsia; female; fever; follow up; functional assessment; genetic heterogeneity; hazard ratio; headache; hospitalization; human; human cell; incidence; injection site pain; insomnia; k nearest neighbor; limb fracture; long term survival; major clinical study; male; mesenchymal stem cell; micturition disorder; multicenter study; muscle tightness; musculoskeletal pain; myalgia; nausea; new drug application; pain; probability; productive cough; propensity score; proportional hazards model; pruritus; respiratory failure; risk assessment; risk management; sleep disorder; stem cell transplantation; survival; survival analysis; survival time; vomiting | English | 2023 | 2023-04-12 | 10.3389/fnagi.2023.1148444 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Low-Temperature Enhancement-Mode Amorphous Oxide Thin-Film Transistors in Solution Process Using a Low-Pressure Annealing | The interest in low processing temperature for printable transistors is rapidly increasing with the introduction of a new form factor in electronics and the growing importance of high throughput. This paper reports the fabrication of low-temperature-processable enhancement-mode amorphous oxide thin-film transistors (TFTs) using the solution process. A facile low-pressure annealing (LPA) method is proposed for the activation of indium oxide (InOx) semiconductors at a significantly low processing temperature of 200 degrees C. Thermal annealing at a pressure of about similar to 10 Torr induces effective condensation in InOx even at a low temperature. As a result, the fabricated LPA InOx TFTs not only functioned in enhancement mode but also exhibited outstanding switching characteristics with a high on/off current ratio of 4.91 x 10(9). Furthermore, the LPA InOx TFTs exhibit stable operation under bias stress compared to the control device due to the low concentration of hydroxyl defects. | Park, Won; Park, Jun-Hyeong; Eun, Jun-Su; Lee, Jinuk; Na, Jeong-Hyeon; Lee, Sin-Hyung; Jang, Jaewon; Kang, In Man; Kim, Do-Kyung; Bae, Jin-Hyuk | Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 41566, South Korea; LG Display, Paju 10845, South Korea | ; Lee, Sin-Hyung/ABD-6425-2022 | 58494046100; 57454302100; 58493099200; 58487758300; 57192006339; 57226880204; 57194107504; 7203062678; 57984042900; 35326180700 | qkrdnjs0320@knu.ac.kr;kdk7362@knu.ac.kr;jhbae@ee.knu.ac.kr; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 15 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 0.44 | 2025-06-25 | 4 | 4 | metal-oxide semiconductor; thin-film transistors; solution process; low processing temperature; enhancement mode; low-pressure annealing | INDIUM OXIDE; PERFORMANCE; SEMICONDUCTOR; TRANSPARENT; IMPROVEMENT; STABILITY; HYDROGEN | enhancement mode; low processing temperature; low-pressure annealing; metal-oxide semiconductor; solution process; thin-film transistors | English | 2023 | 2023-08 | 10.3390/nano13152231 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Nanostructured Calcium-Incorporated Surface Compared to Machined and SLA Dental Implants-A Split-Mouth Randomized Case/Double-Control Histological Human Study | Background: Implant surface topography is a key element in achieving osseointegration. Nanostructured surfaces have shown promising results in accelerating and improving bone healing around dental implants. The main objective of the present clinical and histological study is to compare, at 4 and 6 weeks, (w) bone-to-implant contact in implants having either machined surface (MAC), sandblasted, large grit, acid-etched implant surface (SLA) medium roughness surface or a nanostructured calcium-incorporated surface (XPEED (R)). Methods: 35 mini-implants of 3.5 x 8.5 mm with three different surface treatments (XPEED (R) (n = 16)-SLA (n = 13)-MAC (n = 6), were placed in the posterior maxilla of 11 patients (6 females and 5 males) then, retrieved at either 4 or 6w in a randomized split-mouth study design. Results: The BIC rates measured at 4w and 6w respectively, were: 16.8% (+/- 5.0) and 29.0% (+/- 3.1) for MAC surface; 18.5% (+/- 2.3) and 33.7% (+/- 3.3) for SLA surface; 22.4% (+/- 1.3) and 38.6% (+/- 3.2) for XPEED (R) surface. In all types of investigated surfaces, the time factor appeared to significantly increase the bone to implant contact (BIC) rate (p < 0.05). XPEED (R) surface showed significantly higher BIC values when compared to both SLA and MAC values at 4w (p < 0.05). Also, at 6w, both roughened surfaces (SLA and XPEED (R)) showed significantly higher values (p < 0.05) than turned surface (MAC). Conclusions: Nanostructured Calcium titanate coating is able to enhance bone deposition around implants at early healing stages. | Makary, Christian; Menhall, Abdallah; Lahoud, Pierre; An, Hyun-Wook; Park, Kwang-Bum; Traini, Tonino | St Joseph Univ, Oral Surg Dept, Beirut 11042020, Lebanon; Kyungpook Natl Univ, Dept Dent Sci, Daehak ro, Daegu 41566, South Korea; Daegu Mir Dent Hosp, Daegu 41934, South Korea; Univ G Annunzio Chieti Pescara, Dept Innovat Technol Med & Dent, I-66100 Chieti, Pescara, Italy; Univ G Annunzio Chieti Pescara, Electron Microscopy Lab, I-66100 Chieti, Pescara, Italy | Traini, Tonino/M-3514-2017; Traini, Tonino/AFQ-6844-2022 | 37261690000; 57190987416; 57223054876; 53863338600; 56164619300; 8590564000 | christian.makary@usj.edu.lb;tonino.traini@unich.it; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 2 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 0.98 | 2025-06-25 | 9 | 10 | nano surfaces; early bone formation; implant surface; histomorphometry; osseointegration | TITANIUM IMPLANTS; ENDOSSEOUS IMPLANTS; BONE INTEGRATION; SINGLE IMPLANTS; OSSEOINTEGRATION; MULTICENTER; STABILITY; IMMEDIATE; CONTACT; TI | early bone formation; histomorphometry; implant surface; nano surfaces; osseointegration | English | 2023 | 2023-01 | 10.3390/nano13020357 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Novel LiAlO2 Material for Scalable and Facile Lithium Recovery Using Electrochemical Ion Pumping | In this study, alpha-LiAlO2 was investigated for the first time as a Li-capturing positive electrode material to recover Li from aqueous Li resources. The material was synthesized using hydrothermal synthesis and air annealing, which is a low-cost and low-energy fabrication process. The physical characterization showed that the material formed an alpha-LiAlO2 phase, and electrochemical activation revealed the presence of AlO2* as a Li deficient form that can intercalate Li+. The AlO2*/activated carbon electrode pair showed selective capture of Li+ ions when the concentrations were between 100 mM and 25 mM. In mono salt solution comprising 25 mM LiCl, the adsorption capacity was 8.25 mg g(-1), and the energy consumption was 27.98 Wh mol Li-1. The system can also handle complex solutions such as first-pass seawater reverse osmosis brine, which has a slightly higher concentration of Li than seawater at 0.34 ppm. | Elmakki, Tasneem; Zavahir, Sifani; Hafsa, Umme; Al-Sulaiti, Leena; Ahmad, Zubair; Chen, Yuan; Park, Hyunwoong; Shon, Ho Kyong; Ho, Yeek-Chia; Han, Dong Suk | Qatar Univ, Ctr Adv Mat, POB 2713, Doha, Qatar; Qatar Univ, Coll Arts & Sci, Dept Math Stat & Phys, POB 2713, Doha, Qatar; Qatar Univ, Qatar Univ Young Scientists Ctr QUYSC, POB 2713, Doha, Qatar; Univ Sydney, Sch Chem & Biomol Engn, Sydney, NSW 2006, Australia; Kyungpook Natl Univ, Sch Energy Engn, Daegu 41566, South Korea; Univ Technol Sydney, Fac Engn & IT, Sch Civil & Environm Engn, POB 123, Broadway, NSW 2007, Australia; Univ Teknol PETRONAS, Inst Selfsustainable Bldg, Ctr Urban Resource Sustainabil, Seri Iskandar 32610, Malaysia; Qatar Univ, Coll Engn, Dept Chem Engn, POB 2713, Doha, Qatar | Ahmad, Zubair/JFS-5475-2023; Chen, Yuan/C-6637-2008; Shon, Ho/P-7057-2015; Han, Dong SuK/AAX-9333-2021; Han, Dong Suk/Q-8641-2017; Shon, Ho Kyong/P-7057-2015 | 57221280532; 56493120500; 57389723300; 35368318800; 55358599200; 35261539500; 7601565583; 6701629946; 57192371616; 36139213900 | dhan@qu.edu.qa; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 5 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 0.22 | 2025-06-25 | 3 | 2 | alpha-LiAlO2; activated carbon; lithium recovery; electrochemical ion pumping | BATTERIES; BRINES; AVAILABILITY; EXTRACTION; OPERATION; ELECTRODE; EXCHANGE; WATER | activated carbon; electrochemical ion pumping; lithium recovery; α-LiAlO<sub>2</sub> | English | 2023 | 2023-03 | 10.3390/nano13050895 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Numerical Approach to the Plasmonic Enhancement of Cs2AgBiBr6 Perovskite-Based Solar Cell by Embedding Metallic Nanosphere | Lead-free Cs2AgBiBr6 perovskites have emerged as a promising, non-toxic, and eco-friendly photovoltaic material with high structural stability and a long lifetime of carrier recombination. However, the poor-light harvesting capability of lead-free Cs2AgBiBr6 perovskites due to the large indirect band gap is a critical factor restricting the improvement of its power conversion efficiency, and little information is available about it. Therefore, this study focused on the plasmonic approach, embedded metallic nanospheres in Cs2AgBiBr6 perovskite solar cells, and quantitatively investigated their light-harvesting capability via finite-difference time-domain method. Gold and palladium were selected as metallic nanospheres and embedded in a 600 nm thick-Cs2AgBiBr6 perovskite layer-based solar cell. Performances, including short-circuit current density, were calculated by tuning the radius of metallic nanospheres. Compared to the reference devices with a short-circuit current density of 14.23 mA/cm(2), when a gold metallic nanosphere with a radius of 140 nm was embedded, the maximum current density was improved by about 1.6 times to 22.8 mA/cm(2). On the other hand, when a palladium metallic nanosphere with the same radius was embedded, the maximum current density was improved by about 1.8 times to 25.8 mA/cm(2). | Seo, Kyeong-Ho; Zhang, Xue; Park, Jaehoon; Bae, Jin-Hyuk | Kyungpook Natl Univ, Sch Elect & Elect Engn, 80 Daehakro, Daegu 41566, South Korea; Shandong Univ Sci & Technol, Coll Ocean Sci & Engn, Qingdao 266590, Peoples R China; Hallym Univ, Dept Elect Engn, Chunchon 24252, South Korea | 57211978931; 55949859900; 55717156300; 35326180700 | tjrudgh0826@naver.com;zhangxue00@sdust.edu.cn;jaypark@hallym.ac.kr;jhbae@ee.knu.ac.kr; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 13 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 0.22 | 2025-06-25 | 2 | 2 | metallic nanospheres; Cs2AgBiBr6 perovskite solar cells; finite-difference time-domain method; plasmonic performance | ABSORPTION; BAND | Cs<sub>2</sub>AgBiBr<sub>6</sub> perovskite solar cells; finite-difference time-domain method; metallic nanospheres; plasmonic performance | English | 2023 | 2023-07 | 10.3390/nano13131918 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Numerical Study on Overcoming the Light-Harvesting Limitation of Lead-Free Cs2AgBiBr6 Double Perovskite Solar Cell Using Moth-Eye Broadband Antireflection Layer | Lead-free Cs2AgBiBr6 double perovskite has emerged as a promising new-generation photovoltaic, due to its non-toxicity, long carrier lifetime, and low exciton binding energies. However, the low power conversion efficiency, due to the high indirect bandgap (approximate to 2 eV), is a challenge that must be overcome and acts as an obstacle to commercialization. Herein, to overcome the limitations through the light trapping strategy, we analyzed the performance evaluation via FDTD simulation when applying the moth-eye broadband antireflection (AR) layer on top of a Cs2AgBiBr6 double perovskite cell. A parabola cone structure was used as a moth-eye AR layer, and an Al2O3 (n: 1.77), MgF2 (n: 1.38), SiO2 (n: 1.46), and ZnO (n: 1.9) were selected as investigation targets. The simulation was performed assuming that the IQE was 100% and when the heights of Al2O3, MgF2, SiO2, and ZnO were 500, 350, 250, and 450 nm, which are the optimal conditions, respectively, the maximum short-circuit current density improved 41, 46, 11.7, and 15%, respectively, compared to the reference cell. This study is meaningful and innovative in analyzing how the refractive index of a moth-eye antireflection layer affects the light trapping within the cell under broadband illumination until the NIR region. | Seo, Kyeong-Ho; Biswas, Swarup; Eun, Junsu; Kim, Hyeok; Bae, Jin-Hyuk | Kyungpook Natl Univ, Sch Elect & Elect Engn, 80 Daehakro, Daegu 702701, South Korea; Univ Seoul, Ctr Smart Sensor Syst Seoul CS4, Sch Elect & Comp Engn, 163 Seoulsiripdaero, Seoul 02504, South Korea | Biswas, Swarup/AAH-5067-2019 | 57211978931; 7402251506; 58493099200; 57191718658; 35326180700 | tjrudgh0826@knu.ac.kr;biswas1988@uos.ac.kr;wnstn0812@knu.ac.kr;hyeok.kim@uos.ac.kr;jhbae@ee.knu.ac.kr; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 23 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 0.11 | 2025-06-25 | 1 | 1 | lead-free Cs2AgBiBr6 double perovskite; light trapping strategy; FDTD simulation; moth-eye antireflection layer; refractive index | REFRACTIVE-INDEX; ENERGY; NANOSTRUCTURES; FABRICATION; FILMS | FDTD simulation; lead-free Cs<sub>2</sub>AgBiBr<sub>6</sub> double perovskite; light trapping strategy; moth-eye antireflection layer; refractive index | English | 2023 | 2023-12 | 10.3390/nano13232991 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Piezoelectric Nanogenerators Fabricated Using Spin Coating of Poly(vinylidene fluoride) and ZnO Composite | In this context, the open-circuit voltage generated by either poly (vinylidene fluoride) or PVDF and ZnO composite sample before being enhanced to 4.2 V compared to 1.2 V for the samples of pure PVDF. The spin coating method was used to create a composite film, which served as a piezoelectric nanogenerator (PNG). Zinc oxide (ZnO) nanoparticles and PVDF serve as the matrix for the coating structure. Thin films were created that employed the spin coating method to achieve the desired results of ZnO's non-brittle outcome and piezoelectric characteristics, as well as PVDF for use in self-powered devices. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and fourier transform infrared (FT-IR) were used to evaluate the properties of these formations. The electrical properties of the film were measured using an oscilloscope. Results indicated that by adding ZnO nanoparticles to the PVDF samples, piezoelectric capabilities were enhanced compared to samples containing PVDF only. These results point to promising uses for various wearable devices, such as water strider robot systems and self-operating equipment. | Islam, Md. Jahirul; Lee, Hyeji; Lee, Kihak; Cho, Chanseob; Kim, Bonghwan | Daegu Catholic Univ, Dept Semicond Elect Engn, Gyongsan 38430, South Korea; Kyungpook Natl Univ, Sch Elect Engn, Daegu 41566, South Korea | ; Islam, Jahirul/LXB-2010-2024 | 57212005167; 58167356700; 58148203200; 24471515900; 24833360700 | jahirruet@cu.ac.kr;bhkim@cu.ac.kr; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 7 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 1.63 | 2025-06-25 | 15 | 17 | spin coating; piezoelectric; nanogenerator | HYBRID STRUCTURE; NANOWIRE NANOGENERATOR; ENERGY; OUTPUT; DRIVEN; NANOFIBERS; FILM; ELECTRICITY; BEHAVIOR; ARRAYS | nanogenerator; piezoelectric; spin coating | English | 2023 | 2023-04 | 10.3390/nano13071289 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Simulation of Capacitorless DRAM Based on the Polycrystalline Silicon Nanotube Structure with Multiple Grain Boundaries | In this study, a capacitorless one-transistor dynamic random-access memory (1T-DRAM), based on polycrystalline silicon (poly-Si) nanotube structure with a grain boundary (GB), is designed and analyzed using technology computer-aided design (TCAD) simulation. In the proposed 1T-DRAM, the 1T-DRAM cell exhibited a sensing margin of 422 & mu;A/& mu;m and a retention time of 213 ms at T = 358 K with a single GB. To investigate the effect of random GBs, it was assumed that the number of GB is seven, and the memory characteristics depending on the location and number of GBs were analyzed. The memory performance rapidly degraded due to Shockley-Read-Hall recombination depending on the location and number of GBs. In the worst case, when the number of GB is 7, the mean of the sensing margin was 194 & mu;A/& mu;m, and the mean of the retention time was 50.4 ms. Compared to a single GB, the mean of the sensing margin and the retention time decreased by 59.7% and 77.4%, respectively. | Park, Jin; Lee, Sang-Ho; Kang, Ga-Eon; Heo, Jun-Hyeok; Jeon, So-Ra; Kim, Min-Seok; Bae, Seung-Ji; Hong, Jeong-Woo; Jang, Jae-won; Bae, Jin-Hyuk; Lee, Sin-Hyung; Kang, In-Man | Kyungpook Natl Univ, Sch Elect & Elect Engn, Daegu 702201, South Korea | ; Lee, Sang Ho/MCX-8396-2025; Lee, Sin-Hyung/ABD-6425-2022 | 57376422900; 57416738400; 57883409400; 57884155500; 58070647300; 59073001500; 58485369600; 58485369700; 57194107504; 35326180700; 57226880204; 7203062678 | imkang@ee.knu.ac.kr; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 13 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 0.54 | 2025-06-25 | 5 | 5 | polycrystalline silicon; one-transistor dynamic random-access memory; grain boundary; nanotube; metal-oxide-semiconductor field-effect transistor; dual-gate; statistical analysis | 1T DRAM; 1T-DRAM; OPERATION; PROPOSAL; DESIGN; CELL | dual-gate; grain boundary; metal–oxide–semiconductor field-effect transistor; nanotube; one-transistor dynamic random-access memory; polycrystalline silicon; statistical analysis | English | 2023 | 2023-07 | 10.3390/nano13132026 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Size Effect of a Piezoelectric Material as a Separator Coating Layer for Suppressing Dendritic Li Growth in Li Metal Batteries | Li metal has been intensively investigated as a next-generation rechargeable battery anode. However, its practical application as the anode material is hindered by the deposition of dendritic Li. To suppress dendritic Li growth, introducing a modified separator is considered an effective strategy since it promotes a uniform Li ion flux and strengthens thermal and mechanical stability. Herein, we present a strategy for the surface modification of separator, which involves coating the separator with a piezoelectric material (PM). The PM-coated separator shows higher thermal resistance than the pristine separator, and its modified surface properties enable the homogeneous regulation of the Li-ion flux when the separator is punctured by Li dendrite. Furthermore, PM was synthesized in different solvents via solvothermal method to explore the size effect. This strategy would be helpful to overcome the intrinsic Li metal anode problems. | Kim, Junghwan; Kwon, Kihwan; Kim, Kwanghyun; Han, Seungmin; Kim, Patrick Joohyun; Choi, Junghyun | Korea Inst Ceram Engn & Technol, Energy Storage Mat Ctr, Jinju 52851, South Korea; Kyungpook Natl Univ, Dept Appl Chem, Daegu 41566, South Korea | 55966669500; 58045803700; 55261223600; 58619237900; 57195611779; 59883103900 | pjkim@knu.ac.kr;jchoi@kicet.re.kr; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 1 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 0.76 | 2025-06-25 | 7 | 7 | Li metal battery; separator modification; piezoelectric material; size effect | LITHIUM; ENERGY; CHALLENGES; EMISSIONS; SEI | Li metal battery; piezoelectric material; separator modification; size effect | English | 2023 | 2023-01 | 10.3390/nano13010090 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Sol-Gel-Processed Y2O3 Multilevel Resistive Random-Access Memory Cells for Neural Networks | Yttrium oxide (Y2O3) resistive random-access memory (RRAM) devices were fabricated using the sol-gel process on indium tin oxide/glass substrates. These devices exhibited conventional bipolar RRAM characteristics without requiring a high-voltage forming process. The effect of current compliance on the Y2O3 RRAM devices was investigated, and the results revealed that the resistance values gradually decreased with increasing set current compliance values. By regulating these values, the formation of pure Ag conductive filament could be restricted. The dominant oxygen ion diffusion and migration within Y2O3 leads to the formation of oxygen vacancies and Ag metal-mixed conductive filaments between the two electrodes. The filament composition changes from pure Ag metal to Ag metal mixed with oxygen vacancies, which is crucial for realizing multilevel cell (MLC) switching. Consequently, intermediate resistance values were obtained, which were suitable for MLC switching. The fabricated Y2O3 RRAM devices could function as a MLC with a capacity of two bits in one cell, utilizing three low-resistance states and one common high-resistance state. The potential of the Y2O3 RRAM devices for neural networks was further explored through numerical simulations. Hardware neural networks based on the Y2O3 RRAM devices demonstrated effective digit image classification with a high accuracy rate of approximately 88%, comparable to the ideal software-based classification (similar to 92%). This indicates that the proposed RRAM can be utilized as a memory component in practical neuromorphic systems. | Lee, Taehun; Kim, Hae-In; Cho, Yoonjin; Lee, Sangwoo; Lee, Won-Yong; Bae, Jin-Hyuk; Kang, In-Man; Kim, Kwangeun; Lee, Sin-Hyung; Jang, Jaewon | Kyungpook Natl Univ, Coll IT Engn, Sch Elect Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Inst Elect Technol, Daegu 41566, South Korea; Korea Aerosp Univ, Sch Elect & Informat Engn, Goyang 10540, South Korea | ; Lee, Sin-Hyung/ABD-6425-2022 | 57930311700; 57929938600; 58567567900; 58567753300; 57209527128; 35326180700; 7203062678; 36004977500; 57226880204; 57194107504 | lth0313@knu.ac.kr;khi5735@knu.ac.kr;chongo815wls@knu.ac.kr;sangw98@knu.ac.kr;yongsz@knu.ac.kr;jhbae@ee.knu.ac.kr;imkang@ee.knu.ac.kr;kke@kau.ac.kr;sinhlee@knu.ac.kr;j1jang@knu.ac.kr; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 17 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 0.98 | 2025-06-25 | 10 | 10 | sol-gel; Y2O3; RRAM; multilevel cell | THIN-FILM | multilevel cell; RRAM; sol–gel; Y<sub>2</sub>O<sub>3</sub> | English | 2023 | 2023-09 | 10.3390/nano13172432 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Sol-Gel-Processed Y2O3-Al2O3 Mixed Oxide-Based Resistive Random-Access-Memory Devices | Herein, sol-gel-processed Y2O3-Al2O3 mixed oxide-based resistive random-access-memory (RRAM) devices with different proportions of the involved Y(2)O3 and Al2O3 precursors were fabricated on indium tin oxide/glass substrates. The corresponding structural, chemical, and electrical properties were investigated. The fabricated devices exhibited conventional bipolar RRAM characteristics without requiring a high-voltage forming process. With an increase in the percentage of Al2O3 precursor above 50 mol%, the crystallinity reduced, with the amorphous phase increasing owing to internal stress. Moreover, with increasing Al2O3 percentage, the lattice oxygen percentage increased and the oxygen vacancy percentage decreased. A 50% Y2O3-50% Al2O3 mixed oxide-based RRAM device exhibited the maximum high-resistance-state/low-resistance-state (HRS/LRS) ratio, as required for a large readout margin and array size. Additionally, this device demonstrated good endurance characteristics, maintaining stability for approximately 100 cycles with a high HRS/LRS ratio (>104). The HRS and LRS resistances were also retained up to 104 s without considerable degradation. | Kim, Hae-In; Lee, Taehun; Cho, Yoonjin; Lee, Sangwoo; Lee, Won-Yong; Kim, Kwangeun; Jang, Jaewon | Kyungpook Natl Univ, Sch Elect Engn, Sch Elect & Elect Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Inst Elect Technol, Daegu 41566, South Korea; Korea Aerosp Univ, Sch Elect & Informat Engn, Goyang 10540, South Korea | 57929938600; 57930311700; 58567567900; 58567753300; 57209527128; 36004977500; 57194107504 | khi5735@knu.ac.kr;lth0313@knu.ac.kr;chongo815wls@knu.ac.kr;sangw98@knu.ac.kr;yongsz@knu.ac.kr;kke@kau.ac.kr;j1jang@knu.ac.kr; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 17 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 0.11 | 2025-06-25 | 3 | 2 | Y2O3; Al2O3; sol-gel; resistive random-access-memory; high-resistance state; low-resistance state | SWITCHING PARAMETER VARIATION; THIN-FILM; STRESS; LAYER | Al<sub>2</sub>O<sub>3</sub>; high-resistance state; low-resistance state; resistive random-access-memory; sol–gel; Y<sub>2</sub>O<sub>3</sub> | English | 2023 | 2023-09 | 10.3390/nano13172462 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Structure and Dielectric Properties of Poly(vinylidenefluoride-co-trifluoroethylene) Copolymer Thin Films Using Atmospheric Pressure Plasma Deposition for Piezoelectric Nanogenerator | This study investigates the structural phase and dielectric properties of poly(vinylidenefluoride-co-trifluoroethylene) (P[VDF-TrFE]) thin films grown via atmospheric pressure (AP) plasma deposition using a mixed polymer solution comprising P[VDF-TrFE] polymer nano powder and dimethylformamide (DMF) liquid solvent. The length of the glass guide tube of the AP plasma deposition system is an important parameter in producing intense cloud-like plasma from the vaporization of DMF liquid solvent containing polymer nano powder. This intense cloud-like plasma for polymer deposition is observed in a glass guide tube of length 80 mm greater than the conventional case, thus uniformly depositing the P[VDF-TrFE] thin film with a thickness of 3 mu m. The P[VDF-TrFE] thin films with excellent beta-phase structural properties were coated under the optimum conditions at room temperature for 1 h. However, the P[VDF-TrFE] thin film had a very high DMF solvent component. The post-heating treatment was then performed on a hotplate in air for 3 h at post-heating temperatures of 140 degrees C, 160 degrees C, and 180 degrees C to remove DMF solvent and obtain pure piezoelectric P[VDF-TrFE] thin films. The optimal conditions for removing the DMF solvent while maintaining the beta phases were also examined. The post-heated P[VDF-TrFE] thin films at 160 degrees C had a smooth surface with nanoparticles and crystalline peaks of beta phases, as confirmed by the Fourier transform infrared spectroscopy and XRD analysis. The dielectric constant of the post-heated P[VDF-TrFE] thin film was measured to be 30 using an impedance analyzer at 10 kHz and is expected to be applied to electronic devices such as low-frequency piezoelectric nanogenerators. | Jung, Eunyoung; Park, Choon-Sang; Hong, Taeeun; Tae, Heung-Sik | Kyungpook Natl Univ, Inst Elect Technol, Coll IT Engn, Daegu 41566, South Korea; Milligan Univ, Dept Elect Engn, Johnson City, TN 37682 USA; Korea Basic Sci Inst, Div High Technol Mat Res, Busan 46742, South Korea; Kyungpook Natl Univ, Coll IT Engn, Sch Elect & Elect Engn, Daegu 41566, South Korea | 57203199724; 16025295400; 19337084900; 7006298844 | eyjung@knu.ac.kr;cpark@milligan.edu;tehong@kbsi.re.kr;hstae@ee.knu.ac.kr; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 10 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 0.22 | 2025-06-25 | 2 | 2 | P[VDF-TrFE]; atmospheric pressure plasmas; plasma deposition; dielectric constant | FERROELECTRIC PROPERTIES; TEMPERATURE; FLUORIDE; PHASE; TRFE | atmospheric pressure plasmas; dielectric constant; plasma deposition; P[VDF–TrFE] | English | 2023 | 2023-05-22 | 10.3390/nano13101698 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Structure and Raman Spectra of Exotic Carbon Microcrystals from Meteoritic Dust of Chelyabinsk Superbolide | The Chelyabinsk superbolide, the largest in XXI century, which exploded on 15 February 2013 over snowy fields of Southern Urals was a historic event not just only because of its massive scale and explosive power. High-temperature, high-pressure conditions in the front shock wave caused intense ablation of the asteroid material and formation of huge amount of meteoritic dust dispersed in the atmosphere during the flyby. Massive snowfalls just few days before and after the event conserved precipitated meteoritic dust in thin layer of snow which was collected and studied later. The most intriguing and challenging material discovered in the dust was closed-shell 10-70 mu m exotic polygonal graphitic carbon microcrystals of undisclosed nature. Using optical and electron microscopy and Raman spectroscopy the atomic structure of closed-shell microcrystals was thoroughly studied and their graphitic nature was revealed. It was found that some of the particles formed by multilayer graphitic polygonal shells have extensive hollows inside. Comparative microscopic and spectroscopic analysis of meteorite exotic carbon microcrystals with different graphite species, carbon onions, and diamond revealed two distinctively different closed-shell carbon particles. The first type of the particles can be attributed to carbon onions with characteristic graphite nanocrystalline basic structural units (BSU) of 49 nm lateral size and less and, probably, BSU heteroatomic termination necklace with oxygen content comparable to 1.1% and more. It was shown that the second type of unique graphitic carbon particles of a convex shape and perfect hexagonal symmetry with lateral dimensions of 14 mu m correspond to multiply twinned closed-shell graphite microcrystals with polyhexacyclooctadecane (-C-18-)(n) core wrapped by multiple layers of carbon honeycombs with low (<1%) content of oxygen termination necklace. | Savosteenko, Galina; Taskaev, Sergey; Avramov, Pavel | Chelyabinsk State Univ, Phys Dept, Chelyabinsk 454001, Russia; Univ Sci & Technol MISIS, Energy Efficiency Res & Educ Ctr, Moscow 119049, Russia; Kyungpook Natl Univ, Coll Nat Sci, Dept Chem, Daegu 41566, South Korea | Taskaev, Sergey/AAU-9890-2021 | 57219545971; 55886287900; 7004322420 | paul.veniaminovich@knu.ac.kr; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 1 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 0.22 | 2025-06-25 | 3 | 2 | Chelyabinsk superbolide; meteoritic dust; multiply twinned closed-shell graphite microcrystals | SPHERULES; SILICON; BLACK | Chelyabinsk superbolide; meteoritic dust; multiply twinned closed-shell graphite microcrystals | English | 2023 | 2023-01 | 10.3390/nano13010073 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Studies on the Functional Properties of Titanium Dioxide Nanoparticles Distributed in Silyl-Alkyl Bridged Polyaniline-Based Nanofluids | In the present work, a new kind of nanocomposite (NC)-based solid component was prepared for formulating nanofluids (NFs). The NC comprised metal oxide (titanium dioxide, TiO2) dispersed in a conducting polymer with polyaniline (PANI) and chemically linked silyl-alkyl units in it (PSA) that were designated as T-PSA NC. The NFs with ethylene glycol (EG) as a base fluid were prepared with T-PSA NCs with various compositions of TiO2 and PSA as well for various concentrations of T-PSA NCs. The scanning electron microscopic evaluation of the NC revealed that PSA deposition on TiO2 nanoparticles (NPs) decreased particle agglomeration. The PSA coating on the TiO2 NPs did not influence the crystalline structure of the TiO2 NPs, according to the X-ray diffraction patterns. The thermophysical characterization and molecular interaction features of the NFs at 303 K including a novel inorganic-organic T-PSA NC, were detailed. Furthermore, the stability of the T-PSA NC-based NFs was investigated experimentally using the zeta potential, and the particle size distribution change was analyzed using the dynamic light scattering (DLS) method. The T-PSA NCs had particle sizes that were significantly bigger than pristine PSA and pure TiO2. Most of the preparation conditions used to produce the T-PSA NCs resulted in moderately stable suspensions in EG. The results revealed that the ultrasonic velocity increased with the increase in the concentration of T-PSA NC mass % in the NFs, the refractive index and thermal conductivity increased with the increase in the concentration, and the surface tension exhibited a linear change when the ratio of mass % concentration of the T-PSA NCs increased. The combined presence of components that synergistically contribute to the electro, thermal, optical, and rheological properties is expected to attract advanced applications for NFs. | Arumugam, Chandravadhana; Velu, Nandakumar; Radhakrishnan, Padmanaban; Roy, Vellaisamy A. L.; Anantha-Iyengar, Gopalan; Lee, Dong-Eun; Kannan, Venkatramanan | Sri Chandrasekharendra Saraswathi Viswa Mahavidyal, Dept Phys, Kanchipuram 631561, India; S A Engn Coll, Dept Phys, Chennai 600077, India; Maharanis Sci Coll Women, Dept Phys, Mysuru 570005, India; Hong Kong Metropolitan Univ, Sch Sci & Technol, Hong Kong, Peoples R China; Kyungpook Natl Univ, Intelligent Construct Automat Ctr, Daegu 41566, South Korea; Kyungpook Natl Univ, Sch Architecture Civil Environm & Energy, 1370, Sangyeok Dong, Daegu 702701, South Korea | V, NANDA/KDO-7547-2024; VELLAISAMY, Arul Lenus Roy/NDY-9741-2025; A, chandravadhana/LQK-3893-2024; kannan, venkatramanan/N-4628-2016 | 57219466766; 57219472507; 55253788200; 7005870324; 57191999779; 56605563300; 57218952492 | chandu.vadhana@gmail.com;vnandakumar1981@gmail.com;padhu.mphil@gmail.com;vroy@hkmu.edu.hk;algopal99@gmail.com;dolee@knu.ac.kr;kv@kanchiuniv.ac.in; | NANOMATERIALS | NANOMATERIALS-BASEL | 2079-4991 | 13 | 16 | SCIE | CHEMISTRY, MULTIDISCIPLINARY;MATERIALS SCIENCE, MULTIDISCIPLINARY;NANOSCIENCE & NANOTECHNOLOGY;PHYSICS, APPLIED | 2023 | 4.4 | 26.0 | 0.33 | 2025-06-25 | 2 | 3 | titanium dioxide; polyaniline; silyl-alkyl groups; nanofluids; thermal conductivity; stability; thermophysical properties | THERMAL-CONDUCTIVITY ENHANCEMENT; ETHYLENE-GLYCOL; TIO2 NANOPARTICLES; ULTRASONIC INVESTIGATIONS; MOLECULAR-INTERACTIONS; REFRACTIVE-INDEX; WATER; HEAT; VISCOSITY; STABILITY | nanofluids; polyaniline; silyl–alkyl groups; stability; thermal conductivity; thermophysical properties; titanium dioxide | English | 2023 | 2023-08 | 10.3390/nano13162332 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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