Article
Engineering, Electrical & Electronic
Ragaa S. Mahmoud, A. Abu El-Fadl, A. A. Abu-Sehly, B. M. Alotaibi, Albandari W. Alrowaily, A. M. Aboraia, E. R. Shaaban
Summary: Pristine ZnO and iron-doped ZnO nanoparticles were prepared by precipitation route. The chemical structure of the samples was analyzed using thermogravimetric analysis, EDX, and XPS. The results showed that the iron-doped ZnO nanoparticles had a hexagonal structure, with increasing Fe content leading to higher lattice strain and smaller crystallite size. UV-vis absorption spectroscopy revealed a decrease in energy gap with increasing Fe content. Photoluminescence spectrometry indicated the presence of numerous recombination faults and sites. Magnetization measurements demonstrated ferromagnetism in the Fe-doped ZnO nanoparticles. These findings have important implications for the use of iron-doped ZnO nanoparticles in optoelectronic and spintronic applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Kazutoshi Inoue, Ji-Young Roh, Kazuaki Kawahara, Mitsuhiro Saito, Motoko Kotani, Yuichi Ikuhara
Summary: This study characterized the atomic structures of grain boundaries in ZnO using scanning transmission electron microscopy and discussed the misorientation dependence of the atomic structures around grain boundaries. The polyhedral-unit arrangements for arbitrary tilt angles were described and predicted by a number-theory-based approach, revealing that geometrical restrictions determine the ZnO grain boundary structures.
Article
Chemistry, Analytical
Juan Lu, Yue Wang, Xiangyu Shan, Zhuo Sun, Xin Zhang, Yingjie Zhao, Yue Hu, Erjun Sun, Li Tian
Summary: An electrochemiluminescence sensor was developed by modifying a glassy carbon electrode with multiwall carbon nanotubes, cobalt oxide doped silver oxide, and porphyrin zinc to detect glucose in biological systems. The sensor demonstrated good sensitivity, selectivity, stability, and reproducibility.
MICROCHEMICAL JOURNAL
(2021)
Article
Multidisciplinary Sciences
Wei Hu, Chao Wang, Hao Tan, Hengli Duan, Guinan Li, Na Li, Qianqian Ji, Ying Lu, Yao Wang, Zhihu Sun, Fengchun Hu, Wensheng Yan
Summary: Embedding Cobalt atoms in graphene lattice can achieve robust room-temperature ferromagnetism, facilitated by the formation of square-planar Co-N-4 moieties and local magnetic moments provided by atomically dispersed Co atoms.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Yi Zhou, Qing He, Fei Zhou, Xingqi Liao, Yong Liu, Zhonghong Lai, Mingqing Liao, Tianyi Han, Yudong Huang, Jingchuan Zhu
Summary: A dilute magnetic semiconductor based on perovskite niobates has been reported, showing stable local ferromagnetism at room temperature with the addition of Co doping. The material exhibits strong saturation magnetization, remnant magnetization, and small coercive field, indicating potential for practical applications.
ROYAL SOCIETY OPEN SCIENCE
(2021)
Article
Chemistry, Physical
Junli Liu, Zhaoyang Gao, Hui Liu, Lingyan Pang, Xuanmeng He, Aiping Hui, Aiqin Wang
Summary: In this study, Co-doped ZnO nanoparticles were prepared and decorated on palygorskite to enhance its antibacterial properties. The nanocomposites showed excellent antibacterial performance due to the production of superoxide anions and hydroxyl radicals by Co-ZnO, as well as the physical piercing effect of palygorskite on cell surfaces. This result paves the way for future functional clay materials.
APPLIED CLAY SCIENCE
(2021)
Article
Materials Science, Ceramics
Arash Babaei, Reza Norouzbeigi, Sogol Asaei
Summary: In this research, nanostructured green pigments of ZnO and Co (CoxZn(1-x)O) were synthesized using impregnated layer combustion synthesis under microwave radiation. The Taguchi design of experiments was employed to investigate the influence of variables on the average crystallite size of particles, and it was found that the Co percentage and template type were the most important factors affecting the colorimetric properties of the final green product.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Environmental
Can-Wen Yu, Cong-Yi Du, Ting Ouyang, Xi-Ting Zhang, Zhao-Qing Liu
Summary: Physical structure change of catalysts based on the electronic metal-support interaction effects is a prospective strategy to enhance their catalytic performance. In this study, Ag and MnCo2O4 supported on N-doped carbon nanotubes were synthesized using a facile hydrothermal and photoreduction strategy, and exhibited enhanced performance for oxygen evolution reaction and oxygen reduction reaction. Theoretical calculations showed that the introduction of Ag optimized the adsorption properties and lowered the reaction activation energy, providing new insights for the fabrication of advanced oxygen electrocatalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Shi-Yi Lin, Li-Xue Xia, Ying Cao, Hong-Ling Meng, Lu Zhang, Jiu-Ju Feng, Yan Zhao, Ai-Jun Wang
Summary: In this study, ZnCo dual-atomic sites were incorporated in hierarchical N-doped carbon via a one-step bio-inspired pyrolysis. The resulting ZnCo-N-x system exhibited excellent catalytic characteristics for the ORR. The assembled Zn-air battery showed a maximum power density of 123.7 mW cm(-2) and robust stability.
Article
Engineering, Environmental
Youngmoo Jeon, Jeongyeon Lee, Hakrae Jo, Hwichan Hong, Lawrence Yoon Suk Lee, Yuanzhe Piao
Summary: The study successfully synthesized N-doped hollow carbon composite embedded with well-dispersed Co/Co3O4 nanoparticles via the carbonization of a Zn/Co bimetallic metal-organic frameworks/ZnO nanospheres core-shell structure. The sulfur-infiltrated Co/Co3O4-NHC cathode exhibited excellent rate performance and stability, retaining 87.8% of specific capacity after 250 cycles, showing promise for high-performance Li-S batteries. This work provides insights on designing sulfur host materials for next-generation energy storage technology.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Physics, Applied
V. Ney, B. Henne, M. de Souza, W. Jantsch, K. M. Johansen, F. Wilhelm, A. Rogalev, A. Ney
Summary: The valence state and lattice incorporation of Ni in Zn/Co-based magnetic oxides are investigated in a wide range. The structural and magnetic properties of various types of samples are analyzed. In wurtzite ZnO, Ni is found to exclusively occupy tetrahedral lattice sites with a 2+ oxidation state and behaves as an anisotropic paramagnet. In ZnCo2O4 spinel, Ni is incorporated in a 3+ oxidation state on octahedral sites and couples antiferromagnetically to Co moments. The concentration of Ni affects the magnetic properties, leading to partial magnetic compensation and ferrimagnetism. Increasing Ni concentration results in phase separation and a less defined composite magnetic oxide.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Chia-Hsun Hsu, Xin-Peng Geng, Pao-Hsun Huang, Wan-Yu Wu, Ming-Jie Zhao, Xiao-Ying Zhang, Qi-Hui Huang, Zhan-Bo Su, Zi-Rong Chen, Shui-Yang Lien, Wen-Zhang Zhu
Summary: Aluminum-doped ZnO films were prepared using spatial ALD technique, and the Al doping level was successfully predicted by controlling the ratio of TMA to DEZ vapor molecules. Films prepared under specific conditions showed good electrical properties with a high Al-doping efficiency of 73%.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Hanaa. M. Ahmed, Zakaria M. Abd El-Fattah, Noori. S. Anad, Mohamed Attallah, Hany. H. El-Bahnasawy
Summary: In this study, pure polyvinyl chloride (PVC) and PVC-based nanocomposites containing pure and Cr-doped ZnO nanoparticles were fabricated using the solvent casting method. Scanning electron microscopy images confirmed the successful incorporation of nanoparticles within the PVC matrix. The nanocomposite samples exhibited improved thermo-mechanical stability and remarkable enhancement in dielectric response.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Nanoscience & Nanotechnology
Michael W. Murphy, Laura Bovo, Gregorio Bottaro, Lidia Armelao, Tsun-Kong Sham
Summary: Controlled synthesis of Mn-doped ZnO nanostructures with varying Mn concentrations and temperature treatments revealed interesting characteristics. Mn doping affects the lattice structure and optical luminescence properties of ZnO nanoparticles, showing potential for improved photocatalytic behavior.
Article
Materials Science, Ceramics
Robert Peter, Ales Omerzu, Ivna Kavre Piltaver, Renato Speranza, Kresimir Salamon, Matejka Podlogar, Karlo Velican, Marko Percic, Mladen Petravic
Summary: In this study, we investigated the photocatalytic activity of ZnO thin films doped with copper atoms during film growth using atomic layer deposition. The results showed that the doped ZnO films exhibited enhanced optical absorption in the visible region, leading to a significant improvement in photocatalytic efficiency under simulated sunlight irradiation.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Da-Young Hong, Seong Kyu Kim, Young-Uk Kwon
JOURNAL OF PHYSICAL CHEMISTRY C
(2015)
Review
Acoustics
Eunjik Lee, Young-Uk Kwon
ULTRASONICS SONOCHEMISTRY
(2016)
Article
Chemistry, Multidisciplinary
Eunjik Lee, Young-Uk Kwon
Article
Multidisciplinary Sciences
Hyung Ik Lee, Yoon Yun Lee, Dong-Uk Kang, Kirim Lee, Young-Uk Kwon, Ji Man Kim
SCIENTIFIC REPORTS
(2016)
Article
Chemistry, Physical
Seung-Ik Jo, Young-In An, Kang-Yeong Kim, Seo-Yeong Choi, Jin-Su Kwak, Kyung-Ryul Oh, Young-Uk Kwon
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2017)
Article
Chemistry, Physical
Jin-Su Kwak, Kang-Yeong Kim, Ji Woong Yoon, Kyung-Ryul Oh, Young-Uk Kwon
JOURNAL OF PHYSICAL CHEMISTRY C
(2018)
Article
Chemistry, Physical
Wenjuan Shi, Ah-Hyeon Park, Byeong Jun Cha, Hyun-Uk Park, Young-Dok Kim, Young-Uk Kwon
APPLIED SURFACE SCIENCE
(2020)
Article
Chemistry, Physical
Anil H. Valekar, Minhui Lee, Ji Woong Yoon, Jaesung Kwak, Do-Young Hong, Kyung-Ryul Oh, Ga-Young Cha, Young-Uk Kwon, Jaehoon Jung, Jong-San Chang, Young Kyu Hwang
Article
Chemistry, Physical
Wenjuan Shi, Ah-Hyeon Park, Hyun-Uk Park, Young-Uk Kwon
JOURNAL OF CATALYSIS
(2020)
Article
Chemistry, Physical
Md. Abdul Matin, Junsu Lee, Gwan Woo Kim, Hyun-Uk Park, Byeong Jun Cha, Sarvjit Shastri, Gunn Kim, Young-Dok Kim, Young-Uk Kwon, Valeri Petkov
APPLIED CATALYSIS B-ENVIRONMENTAL
(2020)
Article
Electrochemistry
Wenjuan Shi, Ah-Hyeon Park, Zhengyang Li, Shiyu Xu, Ji Man Kim, Pil J. Yoo, Young-Uk Kwon
Summary: The study shows that the TiO2 coating on carbon material can enhance the activity and durability of Pt/TiO2/C catalysts for oxygen reduction reaction. The significantly improved performance is attributed to the strong metal-support interactions (SMSI) effect between TiO2 coating and Pt NPs, as well as the bifunctional mechanism from the TiO2 surface around Pt NPs.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Kyung-Ryul Oh, Yejin Han, Ga-Young Cha, Anil H. Valekar, Mijung Lee, Sanil E. Sivan, Young-Uk Kwon, Young Kyu Hwang
Summary: This study demonstrates a dual catalyst system incorporating CO2 hydration and Pd/C catalysts to increase the yield of formic acid from base-free CO2 hydrogenation. The addition of a Mo-132 cluster significantly improves the FA yields and turnover numbers of Pd/C through a ligand exchange-derived CO2 hydration process. The Mo-132@MIL-100(Fe) catalyst not only showed higher turnover numbers compared to the Mo-132 cluster, but also remained separable and recyclable with Pd/C for consecutive reactions.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Physical
Kyung-Ryul Oh, Anil H. Valekar, Ga-Young Cha, Youngmin Kim, Su-Kyung Lee, Sanil E. Sivan, Pravin P. Upare, Mi-Jung Lee, Young-Uk Kwon, Young Kyu Hwang
CHEMISTRY OF MATERIALS
(2020)
Article
Nanoscience & Nanotechnology
Yong-Tae Kim, Hyunok Jung, U-Hwang Lee, Tae-Hoon Kim, Jae Kyung Jang, Jong Bae Park, Joo Yull Rhee, Cheol-Woong Yang, Je-Geun Park, Young-Uk Kwon
ACS APPLIED NANO MATERIALS
(2019)
Article
Nanoscience & Nanotechnology
Kang-Yeong Kim, Jin-Su Kwak, Young-In An, Kyung-Ryul Oh, Young-Uk Kwon
ACS APPLIED MATERIALS & INTERFACES
(2017)
Article
Materials Science, Multidisciplinary
Bibhutibhusan Nayak, S. Narayana Jammalamadaka
Summary: This article presents a method for remote detection of bovine serum albumin (BSA) using modified cantilever beam magnetometry (CBM). By combining a magnetostrictive Fe70Ga30 cantilever with optical detection technique, researchers were able to detect high concentrations of BSA remotely. The results of this study demonstrate the potential of this method in estimating the magnetostriction of thin films.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yu Hao, R. E. Camley, Z. Celinski
Summary: Magnetic particles have various applications and their magnetic state is determined by their size and the strength of an applied magnetic field. Numerical simulations were performed to study the effect of an applied field on the critical size of single-domain magnetic particles, and the critical field at which a particle becomes single-domain was determined.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Nitesh Singh, Naresh Kumar, Dharohar Sahadot, Anil Annadi, Vidyadhar Singh, Murtaza Bohra
Summary: The unique magnetic properties of FM/AFM and hard-FM/soft-FM nanocomposite thin films have significant relevance for numerous applications. The composition and performance of different magnetic phases in the nanocomposite films can be significantly affected by the laser ablation conditions and annealing temperature.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alya Ali Musaed, Samir Salem Al-Bawri, Khaled Aljaloud, Wazie M. Abdulkawi, Mohammad Tariqul Islam, Mandeep Jit Singh, Zaini Sakawi, Husam Hamid Ibrahim
Summary: This research presents a wideband tunable metamaterial for body-centric applications in the millimeter-wave frequency band. The proposed metamaterial has a wide operating frequency range and enhanced gain, making it suitable for improving the antenna performance in 5G wireless communication systems.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Binod K. Rai, Boris Maiorov, Krzysztof Gofryk, Patrick O'Rourke, Catherine Housley, Henry Ajo, Asraf Sawon, Arjun K. Pathak, Narayan Poudel, Qiang Zhang, Travis J. Williams, Matthias Frontzek
Summary: This manuscript reports on the structural and magnetic properties of NdCuGa3. The study confirmed the crystal structure and magnetic phase transition of NdCuGa3 using XRD, neutron diffraction, magnetization, and specific heat measurements. The neutron diffraction data further confirmed the antiferromagnetic phase of NdCuGa3.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Haonan Li, Cong Li, Hailiang Huang, Guodong Hao, Fei Wang
Summary: The electronic structure and ferroelectric-ferromagnetic coupling properties of Y-doped and vacancy-containing GaN-ZnO heterojunctions are systematically investigated. The magnetism in vacancy-containing systems is generated by the spin polarization of unpaired electrons induced by cationic vacancies, while in Y-doped systems, bound magnetic polarons are formed by the orbital hybridization of s-state and d-state electrons of Y-doped elements.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Muhammad Ijaz, Hafeez Ullah, Bandar Ali Al-Asbahi, Mati Ullah Khan, Zaheer Abbas, Sana Ullah Asif
Summary: M-type BaFe11.4-xAlxCo0.6O19 hexaferrites with Al3+ substitutions were synthesized using the co-precipitation method followed by Sonochemical process. The synthesized materials were characterized using XRD, FTIR, UV-vis spectroscopy, VSM, SEM, and LCR meter. The results showed that aluminum doping decreased the band gap and enhanced the magnetic and dielectric properties of the hexaferrites, making them suitable for various applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg I. Utesov
Summary: The elementary excitations spectrum of anisotropic frustrated antiferromagnets in the fan phase is discussed. It is found that the low-energy part of the spectrum consists of a gapless phason branch with linear dispersion and a gapped optical branch corresponding to the fan structure amplitude oscillations. In the high-energy part of the spectrum, the excitations are similar to the magnons of the fully polarized phase.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alexander Ya. Simonovskii, Alexander A. Yanovskii, Arthur R. Zakinyan
Summary: In this study, the departure frequency of vapor bubbles during boiling of ferrofluid in a horizontal magnetic field is experimentally investigated. Two methods, visual and inductive, are used to measure the frequency of bubble departure. The results show that the bubble departure frequency can decrease with increasing magnetic field strength and increase with increasing temperature of the heat-emitting surface. A linear stability analysis is conducted to analyze the influence of the magnetic field on the frequency of bubble formation during ferrofluid boiling.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg Heczko, Michal Rames, Vit Kopecky, Petr Vertat, Michal Varga, Ladislav Straka
Summary: Heusler Ni-Mn-Ga alloys are multiferroic materials that exhibit magnetic shape memory (MSM) phenomena. By doping transition elements into Ni2MnGa alloys, the transformation temperatures can be modified and complex behaviors can be observed, such as the variation in saturation magnetization and the effects of elemental substitution on compound properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Carlos Ariel Samudio Perez, Ariel Flaig de Marchi
Summary: This study investigates the electronic and magnetic properties of the Full-Heusler Fe2MnAs alloy using first-principles calculations. The alloy may form spontaneously and exhibits a ferromagnetic order and high spin-polarization. It can be transformed into a half-metal by contracting the lattice constant. Additionally, certain defects contribute to the spin-polarization of the alloy, making it a fully half-metallic material.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Satish Geeri, Aditya Kolakoti, Prasadarao Bobbili
Summary: In this study, an electromagnetic wave-absorbing material was fabricated using a polymer composite material with fiber orientation and Multiwall Carbon Nanotubes as filler materials, along with a Perfect Electric Conducting material. The experiments demonstrated strong electromagnetic absorbing properties for the composites with PEC-coated and non-PEC-coated materials. Mechanical, thermal, and morphological analysis confirmed the similar trend in properties. CRITIC analysis helped identify the sequence order of sustaining properties for the fabricated composites.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yankai Chen, Ruoxue Zhang, Yukai An
Summary: The piezoelectricity, valley character, and magnetic properties of 2H-VS2 monolayer were studied, revealing its potential applications in spintronics and valleytronics due to its bipolar magnetic semiconductor characteristics and superior physical properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Leonardo S. Lima
Summary: This study investigates the thermodynamic quantities, such as entropy, specific heat, and magnetic susceptibility, in the next-nearest-neighbors Heisenberg model on a honeycomb-kagome lattice. The linear spin-wave approach is applied to obtain the temperature-dependent behavior of these quantities. Additionally, the entanglement negativity, a quantifier of quantum entanglement, and the spin Hall conductivity are also studied. The results show that all the thermodynamic quantities, as well as the entanglement negativity and spin Hall conductivity, exhibit an increasing trend with temperature. Furthermore, it is found that all the analyzed quantities approach zero in the low-temperature limit, consistent with experimental observations.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxing Wang, Maximilian Kai Reimann, Wang Chen, Yikun Zhang, Rainer Poettgen
Summary: The Mo2FeB2-type compounds RE2Ga2Mg (RE = Tm, Er, Ho) exhibit a large magnetocaloric effect, making them promising for cryogenic magnetic cooling applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)