Article
Chemistry, Physical
M. A. Mazo, A. C. Caballero, J. Rubio
Summary: In this study, cheap, abundant, and easily-obtained carbon fillers such as graphite and carbon black were successfully incorporated into a silicon oxycarbide matrix to obtain dense crack-free bulk composites with enhanced electrical and thermal conductivities. Raman parameters were crucial for understanding the electronic and/or phonon transport in the composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Plant Sciences
Hanna B. Margonska, Malgorzata Kozieradzka-Kiszkurno, Emilia Brzezicka, Lukasz P. Halinski, Kevin L. Davies, Monika M. Lipinska
Summary: Crepidium is a large genus of mainly pantropical orchids with limited information on pollination and floral morphology. Field observations show that the flowers are visited by various insects and have two forms of small liquid droplets on the lip surface. Through GC-MS analysis and microscopy examination, it was found for the first time that these species exhibit liquid secretion.
Article
Chemistry, Multidisciplinary
Ziqian Wang, Meng Gao, Tonghua Yu, Siyuan Zhou, Mingquan Xu, Motoaki Hirayama, Ryotaro Arita, Yuki Shiomi, Wu Zhou, Naoki Ogawa
Summary: Stacking order plays a significant role in the properties of van der Waals layered magnets, and recent studies suggest possible different stackings in few-layer crystals. This study combines atomic-scale electron microscopy and theoretical calculations to show that while the bulk stacking persists in bilayers of MnPS3, the local rippling effect lifts the monoclinic symmetry of the few layers. This finding reveals the impact of rippling on the microscopic symmetry of two-dimensional materials and suggests the possibility of approaching the two-dimensional Neel antiferromagnetic honeycomb lattice in MnPS3 without reaching monolayer thickness.
Article
Chemistry, Physical
Munmun Basak, Md Lutfor Rahman, Md Farid Ahmed, Bristy Biswas, Nahid Sharmin
Summary: Cobalt ferrite nanoparticles were synthesized using co-precipitation technique with different precipitating agents, affecting the structure and size distribution. Various analysis methods showed highly correlated results, with SSP method being the most compatible.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Matthew G. Boebinger, Courtney Brea, Li-Ping Ding, Sudhajit Misra, Olugbenga Olunloyo, Yiling Yu, Kai Xiao, Andrew R. Lupini, Feng Ding, Guoxiang Hu, Panchapakesan Ganesh, Stephen Jesse, Raymond R. Unocic
Summary: An automated and feedback-controlled atomic fabrication method is developed to create 1D-2D heterostructures in MoS2 with atomic precision. The shape and symmetry of the scanning pathway can be controlled using an aberration-corrected scanning transmission electron microscope. Density functional theory calculations and ab initio molecular dynamic simulations are used to study the energetic barriers for atomic edge structures and transformation pathways. This work provides an automated method for understanding atomic-scale transformations and enables more precise atomic-scale engineering of materials.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Christoph Hofer, Kimmo Mustonen, Viera Skakalova, Timothy J. Pennycook
Summary: This article presents a new method for precise local 3D atomic structure analysis of 2D materials. By combining few tilt tomography with highly dose efficient ptychography, it becomes possible to analyze fragile 2D materials, particularly for the analysis of local defects.
Article
Multidisciplinary Sciences
M. B. Sreedhara, Simon Hettler, Ifat Kaplan-Ashiri, Katya Rechav, Yishay Feldman, Andrey Enyashin, Lothar Houben, R. Arenal, Reshef Tenne
Summary: The text discusses the significance and potential applications of asymmetric two-dimensional structures, the synthesis of asymmetric misfit layer superstructures, and the chemical selectivity and stability of these structures, providing insights for further research.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Food Science & Technology
Amal S. Albedwawi, Reem Al Sakkaf, Tareq M. Osaili, Ahmed Yusuf, Amin Olaimat, Shao-Quan Liu, Giovanni Palmisano, Nagendra P. Shah, Mutamed M. Ayyash
Summary: This paper investigated the ability of lactic acid bacteria (LAB) and Bifidobacterium to remove acrylamide (AA) and examined the mechanism(s) of the AA removal using various microscopic techniques. The results showed that Bifidobacterium breve and Lactiplantibacillus plantarum exhibited higher acrylamide reduction rates. The study also found that both strains could tolerate low pH levels and remove acrylamide under in vitro gastrointestinal conditions.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Yawei Li, Li Wang, Yufeng He, Wei Zheng, Langhong Lou, Jian Zhang
Summary: The study found that as the temperature increases, the spacing of dislocation networks in the gamma/gamma' interface decreases, while the minimum creep rate increases non-linearly. This is due to the enhanced dislocation-climb in the interface and gamma'-cutting by a <010> superdislocations.
SCRIPTA MATERIALIA
(2022)
Review
Chemistry, Multidisciplinary
Zu-Wei Yin, Wenguang Zhao, Jianyuan Li, Xin-Xing Peng, Cong Lin, Mingjian Zhang, Zhiyuan Zeng, Hong-Gang Liao, Haibiao Chen, Hai Lin, Feng Pan
Summary: This article introduces the importance of EELS as a powerful tool for chemical compositional analyses in battery studies, as well as its role in revealing abundant information in materials. It also looks ahead at the future development of EELS techniques and their potential applications in battery research.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Doyoung Lee, Chang-Lae Kim, Yoonchul Sohn
Summary: The research focused on the formation and growth of intermetallic compounds during reactions between liquid Ga and solid Ni, revealing the presence of a Ga7Ni3 bottom layer and a GaxNi top layer. The experimental results are expected to be valuable for the future incorporation of liquid metals into electronic devices.
Article
Chemistry, Physical
Subodh Shrivastava, Shubhra Mathur, Nutan Sharma, Ankit Kumar Vishwakarma, Chagan Lal Saini, S. P. Nehra
Summary: In this study, conducting MWNT/PANI nanocomposite was successfully synthesized using in-situ oxidative polymerization at low temperatures. The physicochemical properties of the nanocomposite were characterized, and the effect of MWNT loading on the gas sensing properties for hydrogen gas was analyzed. The results showed that the addition of MWNT improved the crystallite, conductivity, stability, and morphology of the composite material. The MWNT/PANI thin film sensor demonstrated high sensitivity and fast response for hydrogen gas detection at low temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Byungwoo Kim, Yoonchul Sohn
Summary: Interfacial reactions between liquid Ga and solid Pd were studied at different temperature ranges, and the growth and precipitation processes of intermetallic compounds were observed. The growth rates at different temperatures were analyzed and possible growth mechanisms were proposed.
SURFACES AND INTERFACES
(2022)
Article
Microbiology
Monika Kakol, Ezher Tagliasacchi, Andrzej Borkowski, Miroslaw Slowakiewicz
Summary: The nutritional condition of seed mussels used in New Zealand's Greenshell mussel aquaculture industry shows high variability, which may contribute to the marked variation observed in spat performance. Environmental factors that limit feeding during harvest and transport of spat are likely influencing the quality of spat used by the industry. Measures to improve the quality of wild spat supply, such as testing nutritional condition and developing nursery culture methods and artificial spat feeds, are needed.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Chemistry, Physical
Xin F. Tan, Flora Somidin, Stuart D. McDonald, Michael J. Bermingham, Hiroshi Maeno, Syo Matsumura, Kazuhiro Nogita
Summary: In this study, high voltage transmission electron microscopy (HV-TEM) was used to observe the morphological changes of Cu6Sn5 in a Sn-3.0 wt%Ag-0.5 wt%Cu (SAC305) solder alloy and Cu substrate. Continuous surveillance of Cu6Sn5 grain boundary movements during soldering increased the fundamental understanding of reaction mechanisms in solder solid/liquid interfaces.
Article
Physics, Multidisciplinary
Zeng Liu, Ling Du, Shao-Hui Zhang, Ang Bian, Jun-Peng Fang, Chen-Yang Xing, Shan Li, Jin-Cheng Tang, Yu-Feng Guo, Wei-Hua Tang
Summary: A flower-like SnO2-SnO/porous GaN (FSS/PGaN) heterojunction was fabricated for the first time, involving a spraying process, hydrothermal preparation of FSS, and electrochemical wet etching of GaN. The loaded SnO2-SnO composites with p-n junctions on the PGaN surface exhibited excellent transport capability, achieving a short response time and release time for H2S sensing. The obtained sensor showed high stability and potential for various applications.
Article
Physics, Multidisciplinary
Li-Li Yang, Yu-Si Peng, Zeng Liu, Mao-Lin Zhang, Yu-Feng Guo, Yong Yang, Wei-Hua Tang
Summary: A self-powered solar-blind ultraviolet (UV) photodetector (PD) was successfully fabricated on a Ga2O3/Bi2WO6 heterojunction. The PD demonstrated a distinct photovoltaic effect and excellent photodetection performance with an ultra-low dark current and a high light-to-dark current ratio in self-powered mode. The PD also showed a stable and fast response speed under different light intensities and voltages. Overall, the Ga2O3/Bi2WO6 heterojunction has the potential to be a candidate for self-powered and high-performance UV photodetectors.
Article
Physics, Multidisciplinary
Jian-Ying Yue, Xue-Qiang Ji, Shan Li, Xiao-Hui Qi, Pei-Gang Li, Zhen-Ping Wu, Wei-Hua Tang
Summary: In this study, solar-blind ultraviolet photodetectors with metal-semiconductor-metal structure were fabricated using β-(Al0.25Ga0.75)x(2)O(3)/β-Ga2O3 film. The performance of the β-Ga2O3 detector was significantly improved after surface passivation with β-(Al0.25Ga0.75)(2)O-3.
Article
Engineering, Electrical & Electronic
Xiao-Hui Qi, Zeng Liu, Xue-Qiang Ji, Jian-Ying Yue, Yu-Song Zhi, Shan Li, Zu-Yong Yan, Yu-Feng Guo, Wei-Hua Tang
Summary: In this article, a deep-ultraviolet (DUV) photodetector (PD) based on a Ga2O3/TiO2 planar heterojunction is fabricated using both the solution and the metalorganic chemical vapor deposition (MOCVD) methods. The PD exhibits impressive DUV sensing properties, including high responsivity (R), specific detectivity (D-*), and external quantum efficiency (EQE). The PD can operate stably in a self-powered mode and has potential for applications in energy-conserving DUV sensing systems.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Jiawei Zhang, Yixuan Cui, Chunxiao Liu, Xiangfu Wang, Weihua Tang
Summary: This paper introduces a new flexible pressure sensor designed with LIG/AgNWs composite to improve ultra-high sensitivity and stability. The dependence of sensor property on LIG/NMP concentration and coating layers was studied, and the sensor showed good sensitivity (56.9 kPa(-1)) and stable performance. Its application in bending fingers and high fives was also studied, and results demonstrate its suitability for human body dynamic posture monitoring.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Review
Physics, Applied
Zeng Liu, Weihua Tang
Summary: This article discusses the recent progress of Ga2O3-based Schottky photodiodes and provides suggestions for Schottky metal selection, interfacial barrier modulation, space electric field adjustment, energy band engineering, and improvement of photodetection performance, aiming to promote the further development of deep-ultraviolet photodetection in the near future.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Instruments & Instrumentation
Zeng Liu, Shaohui Zhang, Maolin Zhang, Junpeng Fang, Ling Du, Jian Zhang, Chang Xu, Yufeng Guo, Weihua Tang
Summary: In this paper, a Ga2O3-based pressure sensor is introduced using the technique of metalorganic chemical vapor deposition thin film growth. Although Ga2O3 is an important semiconductor material for functional electronics and optoelectronics, there has been limited research on Ga2O3-based pressure sensors. However, this study demonstrates that the fabricated Ga2O3-based pressure sensor exhibits good sensing performance for different pressures. The sensor shows an increase in current by two orders of magnitude under a pressure of 5 kPa. Additionally, the response/release times were measured under different pressures ranging from 1 to 20 kPa. This work provides a potential method for constructing smart pressure sensors based on functional Ga2O3.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Physics, Applied
Shan Li, Lili Yang, Zeng Liu, Maolin Zhang, Yufeng Guo, Weihua Tang
Summary: This study reported an ultraviolet photodetector constructed on a simple vertical PEDOT:PSS/SiC hybrid heterojunction, which demonstrated superior self-powered performance. The SiC based photodetector achieved self-powered responsivity over A/W level, comparable with many reported 4H-SiC avalanche photodiodes, due to the abundant charge carrier concentration in 4H-SiC substrate and the large built-in field at PEDOT:PSS/SiC heterointerface. The fabricated PD showed high responsivity, detectivity, and external quantum efficiency, fast rise/decay time, large on-off switching ratio, high spectral rejection ratio, and long lifetime reliability.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Xueqiang Ji, Jianying Yue, Xiaohui Qi, Zuyong Yan, Shan Li, Chao Lu, Zhitong Li, Zeng Liu, Song Qi, Xu Yan, Jinjin Wang, Shuang Wang, Peigang Li, Weihua Tang
Summary: In this study, stable and tunable electron concentration in fl-Ga2O3 homoepitaxial epitaxial films was achieved by using metal-organic chemical vapor deposition (MOCVD) on Fe-doped (010)-oriented fl-Ga2O3 substrates. The electrical properties of the films were found to vary depending on the concentration of Si ions incorporated during the growth process. The results suggest that stable and tunable electron concentration is crucial for optimizing high-power electronic devices based on fl-Ga2O3.
Article
Crystallography
Suhao Yao, Kemeng Yang, Lili Yang, Ganrong Feng, Maolin Zhang, Yufeng Guo, Weihua Tang
Summary: This study investigated the performance of beta-Ga2O3-based Schottky barrier diodes (SBDs) with floating metal rings (FMRs) using numerical simulations. The simulation parameters of beta-Ga2O3 were extracted from experimental results. The device exhibited similar forward conduction characteristics to SBDs without FMRs and its breakdown characteristics were influenced by various structural parameters. An optimized device achieved a breakdown voltage 2.5 times higher than a device without FMRs. The study also showed that the breakdown voltage with such structures can reach at least 1.5 times higher than that of a device without FMRs for general conditions.
Article
Engineering, Environmental
Changqing Jin, Fanglin Wu, Haibo Tang, Hongfei Pan, Zhida Chen, Rui Wang, Zihan Meng, Junsheng Li, Haolin Tang
Summary: This study successfully developed a highly active and anti-ammonia catalyst for hydrogen oxidation reaction by tuning the charge distribution of the support material through nitrogen-doping of carbon. The catalyst demonstrated superior activity and stability, facilitating the resistance to ammonia poisoning in hydrogen electrochemical purification devices.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Gao-Hui Shen, Zeng Liu, Mao-Lin Zhang, Yu-Feng Guo, Wei-Hua Tang
Summary: This paper introduces a 16 x 16 Ga2O3 photodetector array, in which Ga2O3 thin film was deposited on a c-sapphire substrate using metal-organic chemical vapor deposition. The array device was constructed through UV photolithography, lift-off, and electron-beam evaporation techniques. The photodetector showed good wavelength selectivity with a high rejection ratio of 8 x 10(3). It exhibited a fast response ability, with a rise time of 6 ms and a decay time of 48 ms, when excited by a laser. The dark current of the 256 pixels in the array ranged from 2 pA to 4 pA, without any disparity.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Engineering, Multidisciplinary
Gaohui Shen, Zeng Liu, Kai Tang, Shulin Sha, Lei Li, Chee-Keong Tan, Yufeng Guo, Weihua Tang
Summary: This study introduces an 8x8 Ga2O3 solar-blind ultraviolet photodetector array with high photo-response performance and uniform responsivity, which is of great significance for developing Ga2O3-based optoelectronic device applications.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Song Qi, Jiahang Liu, Jianying Yue, Xueqiang Ji, Jiaying Shen, Yongtao Yang, Jinjin Wang, Shan Li, Zhenping Wu, Weihua Tang
Summary: In this work, a graphene/beta-Ga2O3/Ag asymmetric Schottky junction photodetector was constructed to address the issue of elevated dark currents in existing graphene/Ga2O3 devices. By taking advantage of the asymmetric structure design to suppress dark current and the transparent graphene electrode to increase carrier collection efficiency, the device achieved outstanding responsivity, detectivity, external quantum efficiency, and response time. Importantly, it exhibited low dark current and high light-to-dark ratio. Overall, the graphene/beta-Ga2O3/Ag asymmetric Schottky junction photodetector has considerable potential as a deep ultraviolet detector.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Physics, Multidisciplinary
Lei Li, Yu-Song Zhi, Mao-Lin Zhang, Zeng Liu, Shao-Hui Zhang, Wan-Yu Ma, Ma Qiang, Gao-Hui Shen, Xia Wang, Yu-Feng Guo, Wei-Hua Tang
Summary: In this study, a Ga2O3/Al0.1Ga0.9N heterojunction DU PD was successfully fabricated and its photodetection performance was evaluated. The experimental results showed that the PD exhibited good photocurrent response under 254nm and 365nm DUP light illumination, and had low dark current. In addition, the operating mechanism of the dual-band dual-mode heterojunction PD was analyzed, and it was found that it could be sensitive to UVA and UVC wavelengths, expanding its photodetection range.
ACTA PHYSICA SINICA
(2023)
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)