Article
Physics, Condensed Matter
Irina Pozdnyakova, Oleksandr Roik, James W. E. Drewitt, Aleksei Bytchkov, Florian Kargl, Sandro Jahn, Severine Brassamin, Louis Hennet
Summary: The short-range order in liquid Si, Ge, and binary Si-x-Ge1-x alloys was studied by x-ray diffraction and reverse Monte Carlo simulations, showing that the high-density liquid structure is retained in the supercooled liquids while also exhibiting characteristics resembling the diamond structure.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Shota Suzuki, Moeko Matsubara, Hideaki Minamiyama, Marwan Dhamrin, Yasufumi Fujiwara, Yukiharu Uraoka
Summary: We conducted two-dimensional X-ray diffraction measurements during the formation of a silicon-germanium (SiGe) layer by a simple method of aluminum-germanium (Al-Ge) paste screen-printing and annealing. The study found that aluminum (Al) and germanium (Ge) in the Al-Ge paste enter the liquid phase at temperatures around 540°C and 430°C respectively. The SiGe layer grows epitaxially in the same direction as the silicon (Si) substrate by utilizing the liquid phase formed during the cooling process.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
W. G. Yang, G. Hasemann, M. Yazlak, B. Gorr, R. Schwaiger, M. Krueger
Summary: The solidification behavior near the ternary V-ss-V3Si-V5SiB2 eutectic reaction in the V-Si-B system was experimentally investigated, and the composition of the reaction was determined. A comparison was made with calculated results to reveal the competitive solidification behavior between the two-phase and three-phase eutectic growth.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Crystallography
Sarah Kuss, Erica Brendler, Joerg Wagler
Summary: Phenyltetrel pyridine-2-olates were synthesized and characterized using solid-state structure determination and NMR spectroscopy.
Article
Chemistry, Physical
Soumia Merazka, Mohammed Kars, Thierry Roisnel, Mohamed Sidoumou
Summary: The crystal structures of three novel germanium tungstates were studied using single-crystal X-ray diffraction and density functional theory (DFT) calculations. These structures have distorted MO6 (M = Ge/W) octahedra, forming infinite zigzag chains. In Ge x W 1-x O 3 (x - 1/4, 1/2 ), a transition from semiconducting to metallike behavior was observed due to germanium's lower valence acting as a p-type semiconductor. Ge x W 1-x O 3 (x - 1/4, 1/2 ) showed strong reflectivity and absorption in the near-infrared region and weak reflectivity and absorption in the visible region. Ge 1-x WO 4 (x - 0.2) exhibited a narrow band gap (0.89 eV) due to Ge-vacancies, leading to increased absorption and reflectivity in the visible region compared to GeWO4. (c) 2023 Elsevier B.V. All rights reserved.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
Keiji Itoh
Summary: The static structure of (Li2S)(x)(GeS2)(100-x) glasses was studied using diffraction measurements and simulation techniques. It was found that the Ge-S network in the glasses is formed by GeS4 tetrahedra linkages. The number of edge-sharing GeS4 tetrahedra decreases with Li2S content, but the ratio to the number of connections remains constant regardless of the composition. Molecular dynamics simulation was used to determine the positions of Li ions in the Ge-S network, showing that each Li ion occupies a deformed octahedral site.
SOLID STATE IONICS
(2022)
Review
Physics, Condensed Matter
Koji Ohara, Yohei Onodera, Motohiko Murakami, Shinji Kohara
Summary: The lack of experimental data has hindered the understanding of the structure of disordered materials. However, advancements in hard X-ray technology have provided high-quality data, improving our understanding of order in disordered materials. Progress in instrumentation and data analysis techniques at SPring-8 over the past 20 years has further enhanced research on the topology in disordered materials.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
T. Auger, V Michel, L. Cassayre, H. Baketi, B. Barkia, A. Michel, E. Perrin
Summary: The liquid metal embrittlement sensitivity of a low nickel 316 L austenitic steel with eutectic gallium indium alloy was studied, showing that limiting deformation-induced martensite can design austenitic steels resistant to liquid metal embrittlement at low temperatures.
Article
Chemistry, Physical
Md Akhlak Alam, Ayushi Trivedi, M. K. Tiwari, Devarani Devi, Sanjay Rai, Mukul Gupta, D. K. Avasthi
Summary: Gold ion implantation in silicon substrates is widely used in microelectronics, with research indicating significant effects on both the crystalline structure and surface of the silicon material.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Motoharu Imai, Kwangsik Han, Mitsuaki Nishio, Takeshi Kato, Satoshi Kawada, Satoshi Emura, Taichi Abe, Hiroshi Fujihisa
Summary: Cubic SrSi2 is a potentially significant material in thermoelectricity and material science. However, its physical properties have not been thoroughly examined. This study investigates the Sr-Si phase diagram at different silicon content and identifies two intermetallic compounds and two eutectic reactions within the Si content range of 55-100 at%. Additionally, the study presents the crystal structure of the newly discovered SrSi2-X compound.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jie Ren, Margaret Wu, Chenyang Li, Shuai Guan, Jiaqi Dong, Jean-Baptiste Forien, Tianyi Li, Katherine S. Shanks, Dunji Yu, Yan Chen, Ke An, Kelvin Y. Xie, Wei Chen, Thomas Voisin, Wen Chen
Summary: We develop a dual-phase nanolamellar structure in a high-entropy alloy using laser powder-bed fusion additive manufacturing. This structure exhibits a combination of ultrahigh yield strength and large tensile ductility. The deformation mechanisms involve effective blockage of dislocation motion, stacking fault-mediated deformation, and martensitic transformation. The cooperative deformation of the dual phases, assisted by the semi-coherent lamellar interfaces, gives rise to the large ductility.
Article
Chemistry, Multidisciplinary
Diana Zapata Dominguez, Christopher L. Berhaut, Anton Buzlukov, Michel Bardet, Praveen Kumar, Pierre-Henri Jouneau, Antoine Desrues, Adrien Soloy, Cedric Haon, Nathalie Herlin-Boime, Samuel Tardif, Sandrine Lyonnard, Stephanie Pouget
Summary: Germanium is a promising active material for high energy density anodes in Li-ion batteries, and a deep understanding of its (de)lithiation mechanism requires advanced characterizations. By using operando X-ray diffraction and ex situ Li-7 solid-state NMR, researchers have revealed the structural and chemical evolution of crystalline germanium nanoparticles during charge and discharge cycles. The study shows the reversible lattice strain behavior of crystalline germanium, as well as the formation of amorphous and crystalline lithiated phases.
Article
Biochemistry & Molecular Biology
Joerg Wagler, Robert Gericke
Summary: Compound 1Ge and CuCl react to form the heteronuclear complex 2Ge' instead of the expected compound 2Ge. Single-point calculations confirmed the stability of 2Ge' over 2Ge and the stability of 2Si over 2Si'. Decomposition of 2Ge' provided access to crystals of the copper(II) compound 3Ge.
Article
Chemistry, Physical
Jong Woo Choi, Jeong Tae Kim, Je Hyung Park, Sung Hwan Hong, Hae Jin Park, Taek Jib Choi, Ki Buem Kim
Summary: This study evaluated the microstructure and mechanical properties of as-cast non-equiatomic medium entropy alloys, showing that MEAs with 10% Cr content exhibited the highest yield strength and excellent plastic strain. Abnormal deformation behaviors, such as double-yielding phenomenon, were observed in the stress-strain curve, which was related to phase transformation during compressive loading as confirmed through TEM analysis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Polymer Science
Xiang Shi, Pierre-Antoine Albouy, Pascale Launois
Summary: This study presents a different view that the evolution of X-ray patterns reflects changes in crystalline texture rather than polymorphism. This enables a quantitative description of X-ray fiber patterns but also highlights some fundamental structural issues.
Article
Chemistry, Physical
Takahisa Omata, Aman Sharma, Issei Suzuki, Tomohiro Ishiyama, Shinji Kohara, Koji Ohara, Madoka Ono, Yang Ren, Khurelbaatar Zagarzusem, Masaya Fujioka, Gaoyang Zhao, Junji Nishii
Summary: Anhydrous silicophosphoric acid glass exhibited high viscosity at high temperatures, displayed proton conduction, but had lower conductivity.
Article
Chemistry, Physical
Yuki Mizuno, Yuansheng Zhao, Hiroshi Akiba, Shinji Kohara, Koji Ohara, Matthew G. Tucker, Marshall T. McDonnell, Osamu Yamamuro
Summary: This study prepared simple molecular glasses by using a novel cryostat and investigated the orientational correlation between liquid CS2 and glassy CS2. The results showed that at room temperature, the nearest neighbor correlation tended to be parallel and T-shaped arrangements, while in the glassy state, the dominant arrangement was slipped-parallel arrangement.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Materials Science, Ceramics
Jayani Kalahe, Yohei Onodera, Yasuyuki Takimoto, Hiroyuki Hijiya, Madoka Ono, Katsuaki Miyatani, Shinji Kohara, Shingo Urata, Jincheng Du
Summary: This study investigated the effects of various simulation parameters on the short and medium range structures of sodium aluminosilicate glasses using molecular dynamics simulations. It was found that different interatomic potentials have different applicability in studying the glass forming process, with fixed-charge and reactive potentials having their own advantages and disadvantages. Moreover, the results demonstrate that the reactive potential provides reasonable structures consistent with experiments.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
Anita Zeidler, Philip S. Salmon, Takeshi Usuki, Shinji Kohara, Henry E. Fischer, Mark Wilson
Summary: The structure of molten NaCl was investigated using neutron and x-ray diffraction along with molecular dynamics simulations. The results showed that the rigid-ion approach matched the simple theory qualitatively, while the polarizable ion approach provided a good account of the diffraction results and agreed with experimental data.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Materials Science, Ceramics
Shinya Hosokawa, Jean-Francois Berar, Nathalie Boudet, Wolf-Christian Pilgrim, Laszlo Pusztai, Satoshi Hiroi, Shinji Kohara, Hidemi Kato, Henry E. Fischer, Anita Zeidler
Summary: By comparing the local structures of metallic glasses with different glass-forming abilities, characteristic features related to high GFA were discovered. The larger concentration inhomogeneity of Ni/Cu in PNCP, the increased fraction of pure icosahedral arrangements, and the presence of the largest intermediate-size Cu rings may contribute to the excellent GFA of PNCP.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Nanoscience & Nanotechnology
Koji Kimoto, Motoki Shiga, Shinji Kohara, Jun Kikkawa, Ovidiu Cretu, Yohei Onodera, Kazuo Ishizuka
Summary: This study demonstrates a novel technique to analyze the local structure of disordered materials using scanning transmission electron microscopy (STEM) under a contrast variation scheme. By utilizing the contrast of annular dark-field (ADF) and annular bright-field (ABF) imaging, the method provides consistent results with traditional diffractometry techniques and reveals the short-range ordering of amorphous materials.
Article
Chemistry, Physical
Marie-Louise Saboungi, Oleg Borodin, David L. L. Price, Bela Farago, Miguel A. A. Gonzalez, Shinji Kohara, Lucile Mangin-Thro, Andrew Wildes, Osamu Yamamuro
Summary: A new class of electrolytes, hybridizing aqueous with non-aqueous solvents, has been reported. The structure of an electrolyte composed of a mixture of LiTFSI-water and LiTFSI-dimethyl carbonate was measured using high-energy X-ray diffraction and polarized neutron diffraction. The results were compared with molecular dynamics simulations, which showed good agreement except for the prediction of intense scattering in partially deuterated samples, indicating a partial segregation between the two solvents not observed in experimental measurements.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Review
Instruments & Instrumentation
Leighanne C. C. Gallington, Stephen K. K. Wilke, Shinji Kohara, Chris J. J. Benmore
Summary: The popularity of PDF analysis for X-ray total scattering data has increased as access to ex situ synchrotron data has expanded. There is a growing demand for user-friendly software to extract PDFs accessible to non-experts. This review compares the accuracy of different software in analyzing scattering data, emphasizes the importance of normalization and corrections, and highlights the need to understand competing conventions in defining the PDF.
QUANTUM BEAM SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Philip S. Salmon, Anita Zeidler, Motoki Shiga, Yohei Onodera, Shinji Kohara
Summary: The structure of permanently densified silica glass is investigated using neutron and x-ray diffraction and atomistic models. The focus is on the ordering on an intermediate length scale that originates from the formation of n-rings. The densification process affects this ordering, as evidenced by changes to the first sharp diffraction peak. However, the distribution of ring sizes does not directly influence the form of this peak. Instead, a significant contribution to glass densification is from compaction of the n-rings, which is quantified by the radius of gyration and lifetime of the rings.
Article
Materials Science, Multidisciplinary
Mohammad Kassem, Chris J. J. Benmore, Andrey Tverjanovich, Takeshi Usuki, Maxim Khomenko, Daniele Fontanari, Anton Sokolov, Koji Ohara, Maria Bokova, Shinji Kohara, Eugene Bychkov
Summary: Antimony sesquisulfide Sb2S3 is an outstanding advanced functional material in various rapidly growing applications. The high optical and electric contrast between the crystalline and amorphous states of Sb2S3 is due to the different short and intermediate range order. Substitution with anions (Se) or cations (Bi) can further improve the material's performance.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Hirokazu Masai, Shinji Kohara, Toru Wakihara, Yuki Shibazaki, Yohei Onodera, Atsunobu Masuno, Sohei Sukenaga, Koji Ohara, Yuki Sakai, Julien Haines, Claire Levelut, Philippe Hebert, Aude Isambert, David A. Keen, Masaki Azuma
Summary: Densified amorphous silica (SiO2) fabricated from siliceous zeolite (SZ) remains permanently densified, unlike densified glassy SiO2 (GS) fabricated by cold compression. The topology of the densified SZ retains the characteristics of crystalline SZ, while the densified GS relaxes to pristine GS after thermal annealing. These findings suggest the possibility of designing new functional amorphous materials by tuning the topology of the initial zeolitic crystalline phases.
COMMUNICATIONS CHEMISTRY
(2023)
Review
Materials Science, Ceramics
Shinji Kohara
Summary: The advent of advanced quantum beam sources and advanced instrumentation techniques enable the probing of intermediate-range ordering in glasses and liquids. Recent research studies on probing the order within disorder in oxide glasses and liquids are reviewed, and the application of advanced topological analyses to uncover hidden ordering is addressed.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2022)
Article
Materials Science, Ceramics
Takuya Aoyagi, Yohei Onodera, Shinji Kohara, Takashi Naito, Toshiaki Ina, Daiko Takamatsu, Taigo Onodera, Tatsuya Miyake, Shinichi Tachizono, Kei Yoshimura
Summary: This article focuses on the characteristics of Ag2O·V2O5·TeO2 glass and its application in low-temperature hermetic sealing. The study found that increasing the content of Ag2O can reduce the glass transition temperature and improve water durability, which is attributed to the increase in the coordination number of oxygen atoms around vanadium ions.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2022)
Article
Chemistry, Physical
Miguel Angel Gonzalez, Hiroshi Akiba, Oleg Borodin, Gabriel Julio Cuello, Louis Hennet, Shinji Kohara, Edward J. Maginn, Lucile Mangin-Thro, Osamu Yamamuro, Yong Zhang, David L. Price, Marie-Louise Saboungi
Summary: In this study, a systematic diffraction study of water-in-salt electrolytes and water-in-bisalt electrolytes was conducted using high-energy X-ray diffraction and polarized and unpolarized neutron diffraction. The measurements provided detailed information about the short- and intermediate-range order of the solutions. The experimental results were compared with molecular dynamics simulations, highlighting the differences between simulations and suggesting potential improvements for the force fields used in the simulations.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Materials Science, Ceramics
Yuta Shuseki, Shinji Kohara, Koji Ohara, Takahiro Ohkubo, Koyo Takei, Matthew G. Tucker, Alexander Kolesnikov, Marshall T. Mcdonnell, Robert L. Sacci, Joerg C. Neuefeind, Ken Takeuchi
Summary: This study demonstrates that amorphous calcium carbonate (ACC) can transform into crystalline calcium carbonate, revealing the process of Sr extraction from aqueous solution. The crystallization of ACC leads to the formation of calcite, while the local environment of Sr in ACC is similar to that in crystalline calcium carbonate aragonite.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2022)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)