Article
Computer Science, Interdisciplinary Applications
Takashi Hanada, Yuichi Motoyama, Kazuyoshi Yoshimi, Takeo Hoshi
Summary: This paper introduces STR, an open-source simulator for simulating TRHEPD and RHEED experiments, which are used to determine the atomic-scale surface structure of materials. By analyzing experimental data and using first-principles calculations, the surface structure, electronic structure, and other physical quantities can be evaluated.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Iztok Naglic, Blaz Leskovar, Zoran Samardzija, Bostjan Markoli
Summary: This study investigated the influence of gallium addition on the phases formed in Al-Mn alloys during casting, revealing that an increase in gallium content led to the formation of IQCs and DQCs in the alloys. Microanalysis showed that IQCs contained more gallium and less manganese compared to DQCs.
Article
Chemistry, Physical
David Garagnani, Paola De Padova, Carlo Ottaviani, Claudio Quaresima, Amanda Generosi, Barbara Paci, Bruno Olivieri, Mieczyslaw Jalochowski, Mariusz Krawiec
Summary: Si films of different thicknesses were grown on a Bi-covered Si substrate and studied using various surface characterization techniques. The results revealed the presence of a new Si allotrope structure, providing insights for the formation of heterostructures with topological insulator materials.
Article
Chemistry, Physical
Masaki Tahara, Kazuya Hasunuma, Hideki Hosoda
Summary: This study investigated the decomposition process of the isothermal alpha '' phase in beta-Ti alloys, and found that the resulting alpha + beta dual phase inherited the microstructural characteristics of the alpha ''(iso) phase. The research results indicate the existence of a strict variant selection rule between the decomposed alpha and beta phases, with a specific variant combination observed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Fabio Ronci, Stefano Colonna, Roberto Flammini, Maurizio De Crescenzi, Manuela Scarselli, Matteo Salvato, Isabelle Berbezier, Holger Vach, Paola Castrucci
Summary: In this paper, an in-depth study was conducted on the growth of nickel silicides under different conditions. It was found that two different nickel silicides form progressively as the annealing temperature increases. The presence of a graphene layer does not alter the nature of the silicide phases but affects the morphology of the silicide overlayer.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Suji Park, Bo Wang, Tiannan Yang, Jieun Kim, Sahar Saremi, Wenbo Zhao, Burak Guzelturk, Aditya Sood, Clara Nyby, Marc Zajac, Xiaozhe Shen, Michael Kozina, Alexander H. Reid, Stephen Weathersby, Xijie Wang, Lane W. Martin, Long-Qing Chen, Aaron M. Lindenberg
Summary: This study presents the first investigation on the ultrafast dynamics and reconfigurability of polarization in freestanding films of a typical relaxor ferroelectric using femtosecond-resolution electron-scattering techniques. The results demonstrate that femtosecond light pulses can induce changes in both the magnitude and direction of the polarization vector within polar nanodomains on a picosecond time scale. These findings offer new possibilities for dynamically reconfigurable control of polarization in nanoscale relaxor ferroelectrics.
Article
Nanoscience & Nanotechnology
Yoonho Ahn, Jong Yeog Son
Summary: The ferroelectric domain switching kinetics of PbTiO3 nanostructures were investigated, showing faster domain switching behavior and lower activation energy compared to PbTiO3 thin film. This insight could be applied to highly integrated and fast ferroelectric random access memory applications.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Physical
Richard Gawel, Lukasz Rogal, Grzegorz Smola, Chungen Zhou, Zbigniew Grzesik
Summary: The purpose of this study is to investigate the effect of water vapor on the corrosion properties of different high entropy alloys under thermal shock conditions at 1000 degrees C. The results show that the addition of H2O leads to more significant scale spallation. Only the Al25Co25Cr25Ni25 alloy exhibits relatively insignificant mass loss even in the presence of 50 %H2O due to the formation of a more continuous Al2O3 layer. It can be concluded that a minimum of 25 at% Al is necessary to provide sufficient protection against water vapor corrosion at high temperatures in cyclic conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Jeffrey M. Wheeler, Bin Gan, Ralph Spolenak
Summary: The combination of correlated high-speed nanoindentation and energy-dispersive spectroscopy was successfully applied to investigate the Ni-Ta system, resolving all seven phases and determining the mechanical properties and composition ranges for each phase. A simple correlation method using overlaid data matrices allowed for easy labeling and segmentation of the data, demonstrating the potential for future research.
Article
Materials Science, Multidisciplinary
Francesca Servadei, Luca Zoli, Antonio Vinci, Pietro Galizia, Diletta Sciti
Summary: The oxidation behavior of Cf/ZrB2-SiC materials with different fiber architectures was investigated, showing that the good dispersion of ZrB2 particles in the polymer-derived SiC(O) matrix promoted the formation of compact oxide scales. It was found that a ZrB2 content of 20-30% in the material was a good compromise between lightness and oxidation resistance.
Article
Chemistry, Physical
Kh. Nazaretyan, S. Aydinyan, H. Kirakosyan, D. Moskovskikh, A. Nepapushev, K. Kuskov, M. Tumanyan, A. Zargaryan, R. Traksmaa, S. Kharatyan
Summary: In this study, novel AlCo-rich AlCoNiFe and AlCoNiFeCr high entropy alloys were successfully prepared and their formation range was predicted by thermodynamic modeling. The factors influencing their formation mechanism and thermal stability were investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Cyril Besnard, Robert A. Harper, Enrico Salvati, Thomas E. J. Moxham, Leon Romano Brandt, Gabriel Landini, Richard M. Shelton, Alexander M. Korsunsky
Summary: In this study, a multi-scale correlative approach was used to compare artificially demineralised human enamel with healthy enamel, revealing structural differences at the micron to sub-micron scale. The decrease in Ca/P atomic % ratio in etched samples compared to healthy enamel, as shown by energy-dispersive X-ray spectroscopy, suggests greater loss of calcium. Synchrotron wide-angle X-ray scattering was employed to analyze differences in lattice structure and texture before and after etching, providing insights into the demineralisation-induced enamel structure alteration.
MATERIALS & DESIGN
(2021)
Article
Energy & Fuels
Olivia E. Baxter, Amit Kumar, J. Marty Gregg, Raymond G. P. Mcquaid
Summary: Researchers have successfully used scanning thermal microscopy to spatially image temperature changes in electrocaloric materials, enabling investigations at sub-micron length scales.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Wan-Hsin Chen, Naoya Kawakami, Jing-Wen Hsueh, Lai-Hsiang Kuo, Jiun-Yu Chen, Ting-Wei Liao, Chia-Nung Kuo, Chin-Shan Lue, Yu-Ling Lai, Yao-Jane Hsu, Der-Hsien Lien, Chenming Hu, Jyh-Pin Chou, Meng-Fan Luo, Chun-Liang Lin
Summary: Layered transition metal dichalcogenides (TMDs) are two-dimensional materials with great potential in electronic and optoelectronic applications, but surface defects significantly affect their performance. We propose a counterintuitive two-step process involving Ar ion bombardment and subsequent annealing to decrease surface defects on TMDs. With this approach, the defect density on PtTe2 and PdTe2 surfaces was reduced by more than 99%, mainly Te vacancies, achieving a defect density <1.0 x 10^10 cm-2, which cannot be achieved solely with annealing. We also attempt to propose a mechanism behind these processes.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Jiwon Jeong, Woo-Sung Jang, Kwang Hun Kim, Aleksander Kostka, Gilho Gu, Young-Min Kim, Sang Ho Oh
Summary: This study evaluates two advanced, automated crystal orientation mapping techniques suitable for nanocrystalline materials. The comparison shows that TEM-PED is more reliable for characterizing grains oriented along low-index zone axes, while SEM-TKD is better at detecting small misorientation between grains, providing better quantification and statistical analysis of grain orientation. Both techniques are complementary tools for nanocrystalline materials and can be selected based on analysis requirements, as they have competitive performance in terms of angular resolution and texture quantification.
MICROSCOPY AND MICROANALYSIS
(2021)
Article
Chemistry, Physical
Zhengwei Xiong, Zhipeng Gao, Shourui Li, Qiang He, Zhen Yang, Haixue Yan, Jun Li
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Energy & Fuels
Zhangyang Zhou, Jun Li, Zhengwei Xiong, Linhong Cao, Yajun Fu, Zhipeng Gao
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2020)
Article
Materials Science, Ceramics
Zhengwei Xiong, Gaomin Liu, Hengchang Nie, Yi Liu, Zhipeng Gao, Qian Liu, Xuefeng Chen, Jun Li, Leiming Fang, Qiang Yang, Xiaoqiang Zhang, Jinlong Tang, Genshui Wang, Xianlin Dong
Summary: Ferroelectric materials can generate current and power under shock compression by changing polarizations and surface bound charge. Lead-free materials like BNT-8BA ceramics exhibit phase transition-induced depolarization at lower pressures than their lead-containing counterparts, making them potential candidates for high-pressure applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Fan Jiang, Jianghe Lan, Zhantao Wei, Bin You, Jun Li, Yang Li, Deli Shi, Zhengwei Xiong, Pingchuan Zhang, Jinsong Chen
Summary: By investigating the cooperation effect of In3+ and V5+ co-doped into bismuth-iron garnets, it was found that the total doped concentration decreased with the increase in V concentration and decrease in In concentration. The synthesized bismuth-iron garnets presented a well single-crystal structure, with the lattice spacing decreasing as x + y decreased. Both the Curie temperature and saturation magnetization showed a linear increase with the decrease of x + y.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Physics, Multidisciplinary
Zhangyang Zhou, Jia Yang, Yi Liu, Zhipeng Gao, Linhong Cao, Leiming Fang, Hongliang He, Zhengwei Xiong
Summary: Controlling the Ag nanonet arrays in monoclinic VO2(M) can effectively adjust the metal-insulator transition, with the transition temperature (T (c)) decreasing from 68 degrees C to 51 degrees C as the volume fraction of Ag NAs increases. The mechanism of the T (c) decrease involves an increase in carrier density through the introduction of more free electrons into the VO2 films at the metal-semiconductor junction. These findings offer a new strategy for controlling metal-insulator transitions in VO2 and have potential implications for other strongly correlated materials and their applications.
Article
Chemistry, Inorganic & Nuclear
Zhengwei Xiong, Qian Liu, Zhipeng Gao, Jia Yang, Xiaoqiang Zhang, Qiang Yang, Chenchun Hao
Summary: It was found that heterojunction interface plays an important role in affecting the photocatalytic performance. By designing different interface models and optimizing them, the photocatalytic performance of composites can be significantly improved, with the face-to-face model showing the best performance.
INORGANIC CHEMISTRY
(2021)
Article
Physics, Multidisciplinary
Zhengwei Xiong, Xuemei An, Qian Liu, Jiayi Zhu, Xiaoqiang Zhang, Chenchun Hao, Qiang Yang, Zhipeng Gao, Meng Zhang
Summary: Different nanostructures of CrN material were prepared and studied for their performance in supercapacitors. Results showed that CrN microspheres exhibited the best specific capacitance, cyclic stability, energy density, and power density, mainly due to their high conductance and specific surface area. This work presents a general strategy of fabricating controllable CrN nanostructures to achieve enhanced supercapacitor performance.
Article
Nanoscience & Nanotechnology
Qian Liu, Leiming Fang, Zhengwei Xiong, Jia Yang, Ye Tan, Yi Liu, Youjun Zhang, Qing Tan, Chenchun Hao, Linhong Cao, Jun Li, Zhipeng Gao
Summary: The structure evolution of steels under different strain rates shows a strong rate effect, with dislocations forming low angle grain boundaries at high strain rates and low angle grain boundaries more likely to transform into high angle grain boundaries at low strain rates. The transformation from low angle grain boundaries to high angle grain boundaries is accompanied by grain rotation, and the texture of the steel changes accordingly. These results highlight the importance of the rate effect in guiding materials design and applications.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Fan Long, Zhong Changjie, Wang Xuemin, Cao Linhong, Wang Jin, Peng Liping, Zhan Zhiqiang, Xiong Zhengwei, Wu Weidong
Summary: ZnO bulk crystals were grown using low-cost GaN/Al2O3 substrates as seeds by CVT. The crystal quality was improved with decreasing dislocation densities and impurity concentrations. The carrier concentration decreased and carrier mobility increased with the increase of growth time. The findings suggest that GaN/Al2O3 seeds have potential application value in the industrial production of ZnO single crystals.
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
(2022)
Article
Physics, Applied
Zhangyang Zhou, Zhipeng Gao, Zhengwei Xiong, Gaomin Liu, Ting Zheng, Yuanjie Shi, Mingzhu Xiao, Jiagang Wu, Leiming Fang, Tiexing Han, Hao Liang, Hongliang He
Summary: This study reports the electrical response of 0.9BiFeO(3)-0.1BaTiO(3) (BFO-BT) ferroelectric ceramics under shock-wave compression and achieves a record-high power density. The mechanism of shock-induced depolarization and the excellent performance of BFO-BT ceramics are analyzed through in situ high-pressure neutron diffraction.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Zhengwei Xiong, Yi Xiao, Chen Shen
Summary: This study investigates the catalytic activity and electronic properties of catalysts during the electrochemical reduction of CO2 and N2 by using density functional theory calculations. The results show that M@alpha-B (Ti, Cr, Nb, Mo, and Ta) exhibits promising catalytic activity and selectivity for the production of urea. The study also reveals that the d-band center position and charge density transfer of the active center atoms are closely related to the superior activity of the catalysts.
CHEMISTRY OF MATERIALS
(2022)
Review
Materials Science, Multidisciplinary
Xudong Liu, Shufan Chen, Zhengwei Xiong, Kailin Li, Yuxin Zhang
Summary: This review presents the development history and charge storage mechanisms of WO3-x-based electrode materials for pseudocapacitors. The various synthesis strategies and the relationship between microstructure and electrochemical performance are highlighted. The device performance and multifunctional applications of WO3-x-based supercapacitors are introduced. Finally, the challenges and future directions for further development of high-performance WO3-x-based supercapacitors are discussed.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Y. Xiao, C. Shen, Z. Xiong, J. Li, W. Zhang
Summary: A new approach for synthesizing urea on 2D metal borides (MBenes) via electrocatalytic C-N coupling was proposed, utilizing sustainable energy (solar energy) to address the challenge of activating CO2 and N-2 molecules. Computational screening was used to identify efficient catalysts for urea electrosynthesis based on the C-N coupling mechanism.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Jia Yang, Zhipeng Gao, Yi Liu, Zhengwei Xiong, Faqiang Zhang, Zhengqian Fu, Fangfang Xu, Xuefeng Chen, Qiang Yang, Leiming Fang
Summary: Researchers synthesized Li-doped KNN ceramics and characterized the domain structures. Two ferroelectric domains, the 60 degrees/120 degrees and 180 degrees domains, were identified in the ceramic. Surprisingly, the domain structure changed naturally as time passed, with most of the change occurring in the 180 degrees domain wall.
Article
Chemistry, Multidisciplinary
Zhengwei Xiong, Qian Liu, Jinlong Tang, Leiming Fang, Xiaoqiang Zhang, Jun Li, Yajun Fu, Jin Wang, Zhipeng Gao, Deli Shi
Summary: This study embeds iron nanocrystals into epitaxial BaTiO3 matrix, creating a novel nanocomposite system. Different dielectric responses in low temperature-high frequency and low frequency-high temperature regions are revealed by hopping and interfacial polarizations. The increase in iron nanocrystals leads to enhancement in low-frequency conductivity, middle-frequency capacitance, and high-frequency inductive effect.
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)
