Article
Physics, Applied
D. F. N. Santos, M. Lisnyak, N. A. Almeida, L. G. Benilova, M. S. Benilov
Summary: This study uses numerical modeling to investigate the mechanisms of current transfer to non-thermionic arc cathodes during the first quarter-period after ignition of an AC arc on cold electrodes. The dominant mechanisms identified are displacement current, ion current, and thermionic emission current.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Marta Agati, Simona Boninelli, Ahmad Hamdan
Summary: This paper describes the growth mechanism leading to the selective synthesis of 2D-like CuO nanoparticle agglomerates via pulsed electrical discharges in water. By adjusting the voltage and pulse width, the size, shape and crystal properties of CuO nanoparticles can be finely tuned. The agglomeration of CuO nanoparticles is mainly due to the pressure gradients existing within the plasma formed by the discharge.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Analytical
Stevan Stojadinovic, Nenad Radic, Rastko Vasilic
Summary: Ta2O5 coatings were created using micro-arc discharges during anodization on a tantalum substrate in a sodium phosphate electrolyte. The size of the discharges increased while the number of discharges decreased. The effect of discharge duration on the properties and applications of the coatings was investigated.
Article
Chemistry, Physical
Yun-Jae Lee, Trinh Thi Ly, Taehun Lee, Krisztian Palotas, Se Young Jeong, Jungdae Kim, Aloysius Soon
Summary: Accurate atomistic models for metal/oxide interfaces are crucial for understanding copper-based interfacial processes, and in this study, the atomic structures of the 29 and 44 surfaces on Cu(111) are successfully revealed through ab initio STM simulations and experiments. A complete atomistic model for the larger 44 surface is elucidated, providing further insights into early oxidation on copper.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Sangmoon Yoon, Xiang Gao, Jong Mok Ok, Zhaoliang Liao, Myung-Geun Han, Yimei Zhu, Panchapakesan Ganesh, Matthew F. Chisholm, Woo Seok Choi, Ho Nyung Lee
Summary: This study reveals that the ferromagnetism in LaCoO3 thin films does not directly arise from strain itself, but rather from the compressed structural units created within ferroelastically formed twin-wall domains. These compressed structural units exhibit magnetically active properties with a rocksalt-type high-spin/low-spin order. Understanding the ferroelastic nature of these ferromagnetic structural units is crucial for unraveling the intriguing ferromagnetic properties in LCO thin films.
Article
Materials Science, Ceramics
Lingfeng He, Tiankai Yao, Kaustubh Bawane, Miaomiao Jin, Chao Jiang, Xiang Liu, Wei-Ying Chen, J. Matthew Mann, David H. Hurley, Jian Gan, Marat Khafizov
Summary: The early stage of microstructural evolution of ThO2 under krypton irradiation was studied using in situ transmission electron microscopy (TEM). The growth rate and density of dislocation loops were investigated with changing irradiation temperature and ion dose. Different types of dislocation loops were determined using various TEM techniques, and diffusion coefficients of different defects were extracted using a rate theory model.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Coatings & Films
Parisa Molaeipour, Saeed Reza Allahkaram, Sajjad Akbarzadeh
Summary: Plasma electrolytic oxidation (PEO) is a cost-effective and versatile technique to achieve protective oxide coatings in light metals. In this study, composite coatings containing B4C nanoparticles were successfully produced using PEO technique, and the influence of nanoparticles on the coatings' properties and incorporation mechanism were investigated.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Humaira Zafar, Shaima H. Albedwawi, Kyriaki Polychronopoulou, Dalaver Hussain Anjum
Summary: Lanthanide based high entropy oxide (HEO) catalyst supports show promise for catalysis reactions due to the interplay of structural, elemental, and chemical forces. However, determining the structure and chemistry of the phase is challenging because of the high number of elements involved. Researchers use various modalities of transmission electron microscopy (TEM) technique to determine both structure and oxidation states of the HEO phase in samples synthesized with the coprecipitation of five lanthanide metals.
Article
Materials Science, Multidisciplinary
Kai Chen, Lefu Zhang, Zhao Shen, Xiaoqin Zeng
Summary: This study investigated the characteristics and formation mechanisms of the surface oxide scale of 310S stainless steel exposed to 650℃ supercritical water for 1000 hours.
Article
Materials Science, Ceramics
Kevin Pachuta, Halyna Volkova, Benjamin Hirt, Marie-Helene Berger, Emily Pentzer, Alp Sehirlioglu
Summary: Two-dimensional materials have attracted attention for their unique properties, and research into their processing and scalability is crucial for next-generation technologies. A liquid-phase exfoliation method has been developed to produce multilayer cobalt oxide nanosheets in pH-neutral aqueous solutions, with their size, thickness, and morphology confirmed using microscopy techniques.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Review
Materials Science, Multidisciplinary
Knut W. Urban, Juri Barthel, Lothar Houben, Chun-Lin Jia, Lei Jin, Markus Lentzen, Shao-Bo Mi, Andreas Thust, Karsten Tillmann
Summary: Transmission electron microscopy is a crucial tool for studying the structure and properties of materials at atomic resolution. It allows for high spatial resolution and enables the correlation between microstructure and macroscopic properties. With the development of aberration-corrected electron optics, it became possible to perform picometer-scale measurements and chemical analyses. This paper aims to introduce this new type of electron microscopy, discuss its implications, applications, and limitations in materials science, and provide access to relevant literature.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Engineering, Environmental
Simeng Zhu, Pengyu Xiao, Xue Wang, Yang Liu, Xianliang Yi, Hao Zhou
Summary: This study investigates the use of photochemically synthesized manganese oxides as an activator for peroxymonosulfate (PMS) in wastewater treatment. The results show that manganese oxides can effectively remove acid organic pollutants and exhibit anti-interference capacity.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Mechanics
Xian-dong Li, Tian-fei Xiao, Ming-yan Lan, Peng Zheng, Run-ze Li, Zhi-li Zhou, Le-teng Gong, Jian Li
Summary: The dynamic evolution behavior of subsonic streamers and their voltage polarity effects were investigated. The streamer development process can be divided into two stages: bottom-up period characterized by root spherical expansion and OH emission line, and top-down period characterized by head burst expansion and emission lines of H-beta, H-alpha, and O. The magnetic pinch effect on the internal plasma distribution determines the expansion mode of the streamer, while the low capture energy of the solvated electron and local space charge accumulation contribute to the faster propagation of positive streamers at low voltage levels.
Article
Chemistry, Physical
Jingjie Liu, Yifei Yuan, Xiaowei Guo, Bao Li, Reza Shahbazian-Yassar, Dai-Huo Liu, Zhongwei Chen, Khalil Amine, Jun Lu, Lin Yang, Zhengyu Bai
Summary: The morphology and crystallinity of electrode materials play a crucial role in their charge carrier storage properties in rechargeable batteries. By designing electrode particles consisting of numerous nanograins with uniform crystalline orientation, both high surface area and high structural integrity can be achieved, significantly improving Li+ storage kinetics and performance. The mesocrystalline NiCo2O4 electrode exhibits a high specific capacity of 1403 mAh g(-1) after 200 cycles at 1.6 A g(-1) (a rate of 1.8 C), demonstrating the effectiveness of this strategy in enhancing battery performance.
ADVANCED ENERGY MATERIALS
(2021)
Article
Materials Science, Ceramics
Tetiana Prikhna, Mykola Monastyrov, Ivan Soldatov, Bernd Buechner, Lars Giebeler, Aniruddha Sathyadharma Prasad, Orest Ostash, Viktor Moshchil, Viktoriya Podhurska, Pavel Potapov, Vitaliy Romaka, Kai Neufeld, Robert Kluge, Tetiana Serbenyuk, Myroslav Karpets, Mykhaylo Omelyanenko, Anja Wolter-Giraud, Semyon Ponomaryov
Summary: Nanopowder of iron oxide (Fe3O4) was prepared by electroerosion dispersion method and used for manufacturing microwave absorbing materials. The materials exhibited high absorption at 36.6 GHz with a level of 99% and at 10 GHz and 36.6 GHz with absorption rates of 90% and 98.4%, respectively. The study also showed that the magnetic properties of the materials can be controlled non-destructively under mechanical load. Sintering of the iron oxide nanopowder under high pressure and temperature conditions resulted in the reduction of iron oxide and nitriding with nitrogen released from hexagonal boron nitride, leading to improved soft magnetic characteristics.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Madeeha Riaz, Manahil Najam, Hina Imtiaz, Farooq Bashir, Tousif Hussain
Summary: This study focuses on the structural and biological analysis of Zn-Cu based biodegradable alloys for orthopedic applications. The results indicate that the alloys have good electrical conductivity and biocompatibility, with potential for promoting bone growth and healing process. Additionally, the alloys exhibit a low corrosion rate and improved corrosion resistance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Rijo Rajeev, Sk Safikul Islam, Anitha Varghese, Gurumurthy Hegde, Suryasarathi Bose
Summary: In this study, a facile and selective electrochemical sensor was developed for the sensing of guanosine. The sensor utilized a unique porous structure and ordered framework, enabling linear detection of guanosine concentration in the range of 0.123-720 μM under specific conditions.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Rafael V. M. Freire, Dominique Celeste de A. Dias, Jose Yago Rodrigues Silva, Dayane Kelly Dias do Nascimento Santos, Larissa T. Jesus, Ricardo O. Freire, Severino A. Junior
Summary: This study reports the extraction and isolation of euphol from nature, its adsorption in nanosized ZIF-8, and the efficacy of this system against cancer cells. Experimental and simulation results show that ZIF-8 can enhance the effectiveness of euphol against cancer cells and selectively target cancer cells.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Manal A. Awad, Awatif A. Hendi, Maha M. Almoneef, Maymunah Alwehaibi, Khalid M. Ortashi, Wadha Alenazi, Fatimah S. Alfaifi, Shareefa Alahmariye, Asma Alangery, Warda Ali Alghoubiri, Haia Aldosari
Summary: In this study, magnesium-doped zinc oxide nanoparticles were synthesized and characterized. The research findings show that magnesium doping can alter the crystal structure and optical properties of zinc oxide, while enhancing its dielectric constant.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
F. J. Willars-Rodriguez, I. R. Chaverz-Urbiola, M. A. Hernandez-Landaverde, A. Zavala-Franco, E. A. Chavez-Urbiola, P. Vorobiev, Yu V. Vorobiev
Summary: This study focuses on manganese doped CdS thin films synthesized by chemical bath deposition. The incorporation of Mn2+ cations in CdS was found to influence the crystalline structure, morphology, and optoelectronic properties. Doped thin films exhibited a uniform hexagonal structure, changed growth orientation, and showed scale-like and needle-like morphologies. The bandgap and rectification speed of Schottky diodes were modified by introducing manganese. This study suggests the potential for affordable high-speed optoelectronic devices.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Mehdi Javidi, Hooman Karimi Abadeh, Fatemeh Namazi, Hamid Reza Yazdanpanah, Narjes Shirvani Shiri
Summary: This study investigated the synergistic effect of temperature, solution velocity, and sulphuric acid concentration on the corrosion behavior of carbon steel using response surface methodology. The results showed that temperature affected anodic reactions, solution velocity influenced cathodic reactions, and acid concentration altered the corrosion mechanisms by changing the properties of the surface layer.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
R. Sakthivel, Thirumoorthy Kulandaivel, Kirankumar Venkatesan Savunthari, K. Mohanraj, Hans-Uwe Dahms, Aswin kumar Anbalagan, Manjunath Rangasamy, Kien-Voon Kong
Summary: In this study, saturated fatty acids were incorporated with silane to modify viscose fabric, resulting in superhydrophobic and superoleophilic properties. The modified fabric showed excellent separation efficiency for oil and organic solvents, with high absorption capacity. The modified fabric also exhibited durability and retained its properties in harsh conditions.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Wei Zhang, Hong Lei, Wenqing Liu, Zefang Zhang, Yi Chen, Xiaogang Hu, Xiangshan Ye
Summary: In this study, EDTA-grafted alumina composite abrasives were produced by a two-step process for the CMP of sapphire substrates. Experimental results showed that the modified abrasives exhibited better dispersion properties and significantly improved polishing efficiency, with higher material removal rates and lower surface roughness. The combination of chemical reaction and mechanical action enhanced the CMP performance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Shumaila Rafaqat, Bushra Perveen, Warda Raqba, Warda Imran, Arshad Hussain, Naeem Ali
Summary: This study developed a MnP-based biosensor for quantitative measurement of dye concentrations using electrochemical signals. The effects of two different dyes on MnP activity were investigated, with one dye showing inhibitory effects and the other dye having no effect. The study demonstrates the potential application of enzyme-based biosensors in dye detection and toxicological monitoring.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Jinyan Shi, Oguzhan Yavuz Bayraktar, Baris Bayrak, Burak Bodur, Ali Oz, Gokhan Kaplan, Abdulkadir Cuneyt Aydin
Summary: The elemental composition of precursors is crucial for the performance development of geopolymers. The use of lime instead of metakaolin increases the fluidity and mechanical properties of geopolymers, while the addition of gypsum decreases them. Furthermore, higher lime content exacerbates the negative effect of gypsum.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Aayush Gupta, Kaveri Ajravat, Loveleen K. Brar, O. P. Pandey, Pandey Rajagopalan
Summary: This study focuses on the performance of Mn3O4-ZnO composite material in wastewater treatment and energy storage applications, and presents a detailed comparative analysis. Results show that the composite material with equal concentrations of Mn3O4 and ZnO exhibits excellent photocatalytic activity and high capacitance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
V. Murugabalaji, Matruprasad Rout, Harsh Soni, Biranchi Narayan Sahoo
Summary: This study focuses on the corrosion characteristics of AA 7075 and AA 7075 based hybrid composite fabricated using stir casting and hot rolling techniques. The results show that the hybrid composite produced by hot cross rolling exhibits better corrosion resistance compared to the base metal. The addition of a small amount of graphite improves the bonding between the matrix and reinforcements, and the hot cross rolling enhances this bonding, leading to the formation of a strong passivation oxide layer and increased charge transfer resistance, thereby improving corrosion resistance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Fangkun Ning, Qinghao Shi, Shuping Kong, Weitao Jia, Lifeng Ma
Summary: The paper investigates a new method of rolling sheets with variable chamfering amounts in both the transversal and normal directions. The feasibility of the technological process was tested through simulation and compared with experimental results. Three important process parameters, temperature, stress, and flow velocity, were used to evaluate the effects on chamfering amount before determining the optimal angle. The spread formula for evaluating the shape quality of the plate after ECR was obtained through testing and theory.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Aqeel Abbas, M. A. Hussein, Mohamed Javid
Summary: In this study, the AM60 magnesium alloy was processed using high-energy ball milling, and the results showed that different reinforcement agents had certain effects on particle size, crystallite size, lattice strain, and dislocation density.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
D. S. Mahmoud, E. M. Eldesouki, W. M. Abd El-Gawad
Summary: The development of flexible and lightweight microwave-absorbing materials has become a trendy topic. This study focuses on enhancing the microwave-absorbing performance of butadiene-acrylonitrile rubber (NBR) by incorporating novel reinforcing nanofillers. The results show that the NBR nanocomposite with a loading of 16 parts per hundred rubber (phr) of LiFe 20%/Si has the best microwave-absorbing performance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)