Article
Chemistry, Physical
Yi Xiong, Hongjing Li, Wei Zeng, Yumin Wang, Xiaona Zhao, Pengfei Fang, Weiguo Hu, Lirong Zheng
Summary: This study investigates the growth mechanisms and the impact on piezoelectric properties of few-layer edge-on MoS2/TiO2 heterostructure. It demonstrates that under specific growth conditions, efficient electron transfer and enhanced piezocatalytic activity can be achieved.
APPLIED SURFACE SCIENCE
(2022)
Article
Food Science & Technology
Yanlei Li, Fangfang Chen, Zhiming Gao, Wei Xiang, Yuehan Wu, Bing Hu, Xuewen Ni, Katsuyoshi Nishinari, Yapeng Fang
Summary: Oxygen diffusion is important in the lipid oxidation of food emulsions. A simple method was developed to quantitatively observe the oxygen diffusion in the oil-water biphasic system and investigate its relationship with lipid oxidation in O/W emulsions. Various factors influencing emulsion oxidation were considered, with results showing a clear correlation between oxygen diffusion and lipid oxidation in O/W emulsions. Inhibition of oxygen diffusion can slow down lipid oxidation, and changes in the emulsion's oil phase, water phase, and interfacial layer can effectively improve oxidative stability.
FOOD RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Lei Hu, Yi-Feng Sun, Jie Cheng, Xi Qin, Xin-Yi Yang, Song Wu, Ru-Fei Tang, Zhi Long, Ming-Xia Tang, Zheng-Quan Hu, Xing Zou, An-Rong Wang, Shi-Fa Wang, Yong Wei, Li-Li Liu, Xiao-Zhi Wu
Summary: This study investigates the possible applications of single-layer GaInO3 in optoelectronics and piezoelectricity through first-principles study. The findings show that single-layer GaInO3 exhibits a large vertical dipole moment, a direct bandgap, and high transport mobility for both electrons and holes. The strong inside electric field and spatially isolated conduction and valence bands confirm the effective separation of charge carriers. Single-layer GaInO3 is a promising candidate for optical absorbers and detectors, and it possesses a significantly stronger out-of-plane piezoelectric effect compared to previous 2D materials, making it important for modern top-bottom gate technologies.
RESULTS IN PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Haofei Huang, Lei Zhang, Keyun Gu, Zhichao Qian, Yi Shang, Zilong Zhang, Jian Huang, Ke Tang, Linjun Wang
Summary: This study investigates the influence of a Ga2O3 seed layer on the deposition of Ta-doped Ga2O3 (Ga2O3: Ta) nanocrystalline films using RF sputter deposition. The growth process is primarily governed by thermodynamic products. The incorporation of a seed layer decreases the energy requirement for crystallization, encouraging the growth of nanocrystals within the thin film. By choosing an appropriate seed layer and temperature, the nanocrystalline film can adopt a 2D growth mode and achieve a flat surface morphology. Ta5+ effectively replaces Ga3+ in the film, and raising the temperature increases Ta content and reduces resistivity.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Mathematics, Applied
Yu Chen, Junhong Guo
Summary: This study investigates the anti-plane shear problem of piezoelectric composites containing coated nano-elliptical fibers with imperfect interfaces, using both the spring layer interface model and the Gurtin-Murdoch surface/interface model. Conformal mapping and complex function method are employed to derive exact solutions of the electroelastic fields in fiber, coating, and matrix. The generalized self-consistent method accurately predicts the effective electroelastic moduli. Numerical examples demonstrate the effects of material constants, fiber aspect ratio, and volume fraction on the effective electroelastic moduli. The findings provide important theoretical reference for the design and optimization of piezoelectric nanodevices and nanostructures.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2022)
Article
Chemistry, Physical
Intae Son, Seung-Rak Son, Jongil An, Jin-Wook Choi, Soyern Kim, Woo Young Lee, Jun Hyup Lee
Summary: An interfacial molecular array of octadecylamine-functionalized graphene quantum dots was fabricated to achieve simultaneous photoluminescence characteristics and molecular orientation for liquid crystals. The functionalized GQDs were synthesized using a simple bottom-up method and formed a nanostructured molecular array in an LC medium, showing improved performance in LC devices.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Taoufik Slimani Tlemcani, Camille Justeau, Kevin Nadaud, Daniel Alquier, Guylaine Poulin-Vittrant
Summary: In this study, a flexible piezoelectric nanogenerator (PENG) based on zinc oxide (ZnO) nanowires grown on a PDMS substrate was fabricated using hydrothermal synthesis. The electrical characterization and output performance of the ZnO nanowires-based flexible PENG were investigated, showing that adopting an ITO/ZnO seed layer structure can achieve higher electrical output. The proposed ZnO nanowires-based PENG structure provides a flexible and cost-effective solution for supplying portable electronics.
Article
Materials Science, Multidisciplinary
Sharmistha Rakshit, Kshitish Ch. Mistri, Amrita Das, Anirban Lakshman
Summary: The article discusses the propagation of SH-waves in a porous piezoelectric layer sandwiched between different bonding conditions, with interface imperfections significantly affecting the phase velocity of SH-waves.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Peng Wang, Zhihao Lou, Shuai Zhao, Haiyan Chen, Feng Gao, Wenya Li
Summary: n-Sr0.9La0.1TiO3 ceramic and Al2O3 substrate were welded using vacuum diffusion bonding with different electrode layers. Intermetallic compounds were observed at the interface with silver foil and nickel foil as electrode layers. No obvious reaction product was found with copper foil as electrode layer. The joints fabricated with copper electrode layer showed the highest shear strength of 10.23 MPa.
Article
Food Science & Technology
Gan Hu, Jiemin Zhang, Qi Wang, Meihu Ma, Lulu Ma, Shugang Li
Summary: This study investigated the structural and functional properties of succinylated ovalbumin (SOVA) by succinylating ovalbumin (OVA) with different levels of succinic anhydride. The succinylated OVA showed enhanced thermal stability, solubility, and surface properties, as well as improved emulsifying and foaming abilities.
Article
Chemistry, Multidisciplinary
Donghwan Kim, Eunchan Kim, Sohyun Park, Seungah Kim, Byoung Koun Min, Hyo Jae Yoon, Kyungwon Kwak, Minhaeng Cho
Summary: The study utilized vibrational sum-frequency-generation spectroscopy to elucidate the water structure at a water-graphene interface. The observation of an excellent correlation between water adhesion energy of graphene and the fraction of dangling OH groups suggests that VSFG can be an incisive technique for measuring water's adhesion energy on spatially confined interfaces. The results are anticipated to aid in understanding the wettability of low-dimensional materials.
Article
Materials Science, Multidisciplinary
Luyao Fan, Haokai Dong, Liang Yang, Zhigang Yang, Hao Chen
Summary: The study investigates interfacial coherency in the kinetics of austenite to ferrite transformation in Fe-C-M alloys using the phase field method. It is found that incoherent interfaces have higher intrinsic mobility but also more significant solute drag effects compared to semicoherent interfaces. The contribution of semicoherent interfaces to transformation kinetics cannot be ignored when considering coherency-dependent solute drag effects.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Metallurgy & Metallurgical Engineering
Gong Shengkai, Liu Yuan, Geng Lilun, Ru Yi, Zhao Wenyue, Pei Yanling, Li Shusuo
Summary: This paper summarizes the evolution and diffusion behavior of the microstructure at the interface of protective coatings and superalloys. It discusses the influence of interfacial behavior on the microstructural stability and mechanical properties of superalloys. Three methods for controlling the coating/alloy interface are introduced, and the key characteristics of the compatibility of the coating/superalloy interface are summarized. This will promote systematic studies on the effect of the interface on the coating/alloy properties, the combination of multiple methods to control the interface, and the computer-aided coating design.
ACTA METALLURGICA SINICA
(2023)
Review
Multidisciplinary Sciences
Markus Axer, Katrin Amunts
Summary: A comprehensive understanding of the interconnectedness of neurons and brain regions is crucial for studying brain function and dysfunction. Neuroimaging, including diffusion magnetic resonance imaging and tractography, has revolutionized the study of brain connectivity. New methods, such as machine learning and simulation, can help fill in missing experimental data. Future research requires the development of high-resolution templates and directionality concepts in order to represent different solutions of tractography and their accuracy estimates.
Article
Nanoscience & Nanotechnology
Shardul Pandit, Michael Schneider, Claudio Berger, Sabine Schwarz, Ulrich Schmid
Summary: This paper focuses on the impact of an AlN seed layer on the growth and piezoelectric properties of sputter-deposited, polycrystalline Y0.15Al0.85N thin films on a silicon substrate. For the first time, the increase in piezoelectric performance of YxAl1-xN (x = 15%) thin films with a d(33) of approximate to 7.85 pC N-1 due to this seed layer approach is presented, thus reaching in good agreement theoretical predictions. Furthermore, for the first time, the crystalline stability of Y0.15Al0.85N layers in a pure oxygen environment up to 1200 degrees C is reported, demonstrating a high oxygen resistance up to 800 degrees C even in this harsh environment.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Ceramics
Tiandong Zhang, Zhuangzhuang Shi, Chao Yin, Changhai Zhang, Qingguo Chi
Summary: In this work, all-inorganic flexible capacitor films were developed by growing antiferroelectric Pb0.94(Li0.5Al0.5)0.06ZrO3 (PLAZO) and insulating Al2O3 (AO) layer by layer on flexible mica substrates. The introduction of insulating AO layers reconciles the polarization and breakdown strength, resulting in a remarkable improvement in energy storage density and efficiency. Moreover, the APAPA flexible thin film capacitors exhibit excellent frequency stability and bending cyclic endurance.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Tiandong Zhang, Hao Li, Changhai Zhang, Chao Tang, Zhonghua Li, Qingguo Chi
Summary: In this study, the electrical properties of three different inorganic fillers filled into EPDM matrix were systematically studied. The results showed that the conductivity of the composites increased with the increase of filler content, and further increased with temperature, while the electric breakdown strength decreased. It was found that the composites with non-linear electrical conductivity could effectively uniform the electric field, solving the problem of electric field concentration at the root of the stress cone and improving the safe operation of cable accessories.
Article
Polymer Science
Fuping Xu, Yu Feng, Guang Liu, Changhai Zhang, Changming Li, Qingguo Chen, Qingguo Chi
Summary: The serious deterioration of energy density of polymer energy storage dielectrics in high temperature environment is a major obstacle to the application of dielectric film capacitors in electrical and electronic engineering. This study proposes a simple and low-cost method to grow inorganic polar functional layer on the surface of polymer film, which significantly improves the polarization characteristics and energy storage density of the dielectric at high temperature. The in situ growth of Ti(OH)(4) functional layer on the surface of polyetherimide (PEI) film achieves a high energy storage density of 4.59 J/cm(2) at 150 degrees C and 600 MV/m.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Xubin Wang, Tiandong Zhang, Changhai Zhang, Zhonghua Li, Qingguo Chi
Summary: With the development of semiconductor power devices, there is an increasing demand for packaging materials with excellent heat resistance and insulation properties. In this study, the heat resistance and electrical properties of epoxy resins (EP) were improved by incorporating bismaleimide (BMI) with both imide ring and benzene ring structures. The results showed that the introduction of BMI increased the glass transition temperature (T-g) of the EP. The electrical conductivity decreased and the DC breakdown field strength increased in the BMI/EP system, indicating improved insulation properties.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Chunbiao Wang, Yu Feng, Changhai Zhang, Tiandong Zhang, Qingguo Chi, Qingguo Chen, Qingquan Lei
Summary: By introducing polyhedral oligomeric silsesquioxanes (POSS) into epoxy, composites with improved high temperature resistance and insulation are prepared. The composite with a filling content of 2.5% exhibits the highest dipole relaxation activation energy value and the lowest dielectric constant and loss. Trap energy and density are tested and calculated, with the deepest traps introduced in the 1% POSS composite. The composites show similar trends in DC breakdown strength, DC conductivity, and space charge dynamics.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Mengjia Feng, Yu Feng, Changhai Zhang, Tiandong Zhang, Xu Tong, Qiang Gao, Qingguo Chen, Qingguo Chi
Summary: Optimizing the high-temperature energy storage characteristics of energy storage dielectrics is important for the development of pulsed power devices and power control systems. Selecting a polymer with a higher glass transition temperature (T-g) and combining it with other polymers can improve the high-temperature breakdown strength and energy storage efficiency. The novel high-T-g polymer fiber-reinforced microstructure, with polyimide fibers distributed in the composite dielectric, shows excellent high-temperature energy storage properties.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Xinle Zhang, Qingguo Chi, Chao Tang, Hua Li, Changhai Zhang, Zhonghua Li, Tiandong Zhang
Summary: The rapidly growing third-generation wide-band-gap semiconductor electronic device industry urgently requires high-temperature-resistant packaging materials. In this study, bisphenol A-type cyanate (BADCy) with triazine ring structure was introduced into epoxy resin (EP) to improve its heat resistance. The copolymer at higher BADCy concentration achieved the highest crosslink density, showing excellent glass transition temperature and thermal decomposition temperature. The heat resistance and electrical insulation properties of the BADCy/EP system were investigated, and a balance between high heat resistance and good electrical insulation was achieved at 66 mol% BADCy content.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Peng Liu, Tiandong Zhang, Changhai Zhang, Yongquan Zhang, Yu Feng, Yue Zhang, Qingguo Chi, Changming Li
Summary: In this study, an AlN insulation layer was grown on the surfaces of PVTC ferroelectric films using magnetron sputtering. The effects of the AlN layer on the dielectric and energy storage properties were investigated. The results showed that the deposition of an AlN insulation layer can improve the insulation properties and energy storage performance of the films.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Polymer Science
Tiandong Zhang, Shuang Liang, Hainan Yu, Changhai Zhang, Chao Tang, Hua Li, Qingguo Chi
Summary: In this study, the dielectric constant of biaxially oriented polypropylene (BOPP) films was increased by laminating with high dielectric polyvinylidene fluoride (PVDF), leading to an improvement in high-temperature energy storage density. The BOPP/PVDF multilayer films demonstrated excellent energy storage performance at high temperatures and low electric fields.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jingshun Wang, Yongquan Zhang, Guang Liu, Tiandong Zhang, Changhai Zhang, Yue Zhang, Yu Feng, Qingguo Chi
Summary: This study prepared TiO2-B nanoflowers with different nickel doping concentrations using the solvothermal method for use as cathode materials in magnesium-ion batteries. The Ni doping enhanced the electrical conductivity of TiO2-B and promoted magnesium-ion diffusion, resulting in improved electrochemical performance.
Article
Engineering, Electrical & Electronic
Tiandong Zhang, Huiduo Xu, Chuanxian Dai, Changhai Zhang, Yongquan Zhang, Qingguo Chi
Summary: This study investigates the use of conductive carbon nanotubes (CNT) filled into EPDM to improve the non-linear conductivity and the use of insulating hexagonal boron nitride nanosheets (h-BN) to reconcile the electric breakdown strength. The results show that the non-linear conductivity becomes more prominent with increasing CNT loading content, but the electric breakdown strength deteriorates due to the increase of CNT content and temperature. The incorporation of 10 wt.% h-BN significantly reduces the reduction percentage of breakdown strength, enabling the cable accessory to have good lightning shock resistance.
Article
Engineering, Electrical & Electronic
Changhai Zhang, Weidong Yan, Yue Zhang, Yang Cui, Tiandong Zhang, Chao Tang, Xianli Liu, Qingguo Chi
Summary: This paper proposes a method to enhance the energy storage performance of film capacitors by adding linear polymer polycarbonate (PC) to polyvinylidene fluoride (PVDF) and incorporating high-dielectric nanofiller titanium dioxide (TiO2) into the blended matrix.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Chao Yin, Tiandong Zhang, Changhai Zhang, Chang Kyu Jeong, Geon-Tae Hwang, Qingguo Chi
Summary: In this study, flexible all-inorganic (PbLa)ZrO3 thin films were fabricated using the sol-gel method and the influence of microstructure on the electrical properties and energy storage performances was investigated. The results showed that annealing at 550 degrees C resulted in a nanocrystalline structure, leading to high W-rec and outstanding eta. Additionally, the flexible films exhibited good stability.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Guang Liu, Qingquan Lei, Yu Feng, Changhai Zhang, Tiandong Zhang, Qingguo Chen, Qingguo Chi
Summary: In this study, a polycarbonate-based energy storage dielectric with BN/SiO2 heterojunctions was designed to improve the insulation performance at high temperatures. The composite film showed excellent high-temperature energy storage properties, with the ability to withstand high electric field intensity even at 150 degrees C.
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)
