Article
Physics, Condensed Matter
A. Boroughani, E. Faizabadi
Summary: The study investigates the transmission probability and spin-polarization in the exposure of the exchange field for Phosphorene superlattice by manipulating the barrier area thickness. With an increase in the barrier number, perfect transmission and 100% spin-polarization can be achieved at zero incoming angles.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Muhammad Ejaz Khan, Qamar Wali, Muhammad Aamir, Yong-Hyun Kim
Summary: By using first-principles density functional theory combined with a non-equilibrium Green's function approach, the electronic structure and transport properties of triangle zigzag hole incorporated single-walled carbon nanotubes (CNTs) were studied. The magnetism in CNTs is induced by the development of quasibound defect states of pi-orbitals at the zigzag edges of the triangle zigzag holes. The defective CNTs exhibited interesting transport properties, and the completely spin-polarized transmission could be controlled by applying an external electric field.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Dan-Dan Wu, Yu-Tian Ji, Gui-Fang Du, Xiao-Yu Yue, Yi-Yan Wang, Qiu-Ju Li, Xue-Feng Sun, Hua-Hua Fu
Summary: This study proposes a method using bilayer phosphorene with chlorine adatoms to induce single-atom ferroelectric states and construct related spin caloritronic devices. Pure thermal spin current can be obtained by adjusting the concentration of chlorine adatoms or using in-plane strain engineering technique. The spin-Seebeck current and ferroelectric states are layer-dependent and can be switched to the other layer by an external electric field.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Multidisciplinary Sciences
Hailong Wang, Shu Zhang, Nathan J. McLaughlin, Benedetta Flebus, Mengqi Huang, Yuxuan Xiao, Chuanpu Liu, Mingzhong Wu, Eric E. Fullerton, Yaroslav Tserkovnyak, Chunhui Rita Du
Summary: This study reports a noninvasive method to optically access the intrinsic spin transport properties of an antiferromagnetic insulator (α-Fe2O3) using nitrogen-vacancy (NV) quantum spin sensors. By measuring the dynamic fluctuations of spin density, an intrinsic spin diffusion constant of α-Fe2O3 is experimentally measured. This research highlights the importance of using NV centers for diagnosing high-frequency magnetic materials.
Article
Materials Science, Multidisciplinary
Shidong Zhang, Xiaojiao Zhang, Yun-Peng Wang, Bowen Zeng, Mengqiu Long
Summary: In this study, it was found through first principle calculations that coupling effects of impurity atoms and a transverse electric field in two dimensional black phosphorene can induce spin polarization, transforming the system from a semiconductor to a magnetic metal. Additionally, electron doping was shown to cause spin splitting of impurity subbands, leading to the transformation of the system from a semiconductor to a half metal and then to a magnetic semiconductor.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Physics, Multidisciplinary
Qi Liu, Xianyang Lu, Chengrui Fu, Jiarui Chen, Zhe Zhang, Yuting Gong, Xinyue Wang, Yu Yan, Qinwu Gao, Hui Li, Xuezhong Ruan, Yao Li, Jun Du, Jing Wu, Liang He, Bo Liu, Rong Zhang, Yongbing Xu
Summary: The research on spin polarization of magnetic CoFeB thin films is important for spintronic applications. By using spin-resolved photoemission spectroscopy, the surface spin polarization of Co40Fe40B20 thin films with different annealing temperatures was obtained. The results show that the surface properties, including spin polarization, gradually decrease with increasing annealing temperature and are attributed to the enhanced Fe-B bonding after annealing.
CHINESE PHYSICS LETTERS
(2023)
Article
Multidisciplinary Sciences
Yuwaraj Adhikari, Tianhan Liu, Hailong Wang, Zhenqi Hua, Haoyang Liu, Eric Lochner, Pedro Schlottmann, Binghai Yan, Jianhua Zhao, Peng Xiong
Summary: Chirality is a significant property in physics, chemistry, and biology. A recent study found that electrons become spin polarized after passing through chiral molecules, leading to chirality-induced spin selectivity. In this research, the role of spin-orbit coupling (SOC) in the metal electrode for the CISS spin valve effect was investigated through magnetoconductance measurements on magnetic semiconductor-based chiral molecular spin valves with normal metal electrodes of contrasting SOC strengths. The results highlight the essential role of SOC in converting the orbital polarization induced by the chiral molecular structure to spin polarization.
NATURE COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Jingjin Chen, Zhiyong Wang, Xueqiong Dai, Jianrong Xiao, Mengqiu Long, Liang Xu
Summary: In this study, the stability, electronic structure, and magnetic properties of blue phosphorene were systematically investigated using first-principles calculations. The findings show that defects and heteroatoms doping can effectively modulate the band gap and electronic properties of blue phosphorene, potentially leading to electro-optical and electromagnetic applications. Introducing spin-orbit coupling through specific defects in blue phosphorene further enhances its potential for various technological applications.
Article
Physics, Multidisciplinary
Marta Galbiati, Fernando Ramiro-Manzano, Jose Joaquin Perez Grau, Fernando Cantos-Prieto, Jaume Meseguer-Sanchez, Ivona Kosic, Filippo Mione, Ana Pallares Vilar, Andres Cantarero, David Soriano, Efren Navarro-Moratalla
Summary: By using hyperspectral wide-field imaging, researchers revealed a nonmonotonic thickness dependence of the optical properties in magnetic 2D material CrI3. This finding sheds light on the structural conundrum and offers insights into mesoscopic effects in layered materials and light-matter interactions in magnetic 2D materials.
PHYSICAL REVIEW LETTERS
(2023)
Article
Nanoscience & Nanotechnology
H. L. Shi, J. Yang, Q. Z. Han, Y. H. Ren, Y. H. Zhao, S. Y. He, L. J. Gong, Z. T. Jiang
Summary: We systematically investigated the effects of Cr doping on the thermoelectric properties of blue phosphorene along the armchair and zigzag directions. The results showed that the doping concentration and transport directions significantly affected the band structure, Seebeck coefficient, electronic conductance, thermal conductance, and ZTs of blue phosphorene. Moreover, we observed two pairs of peaks in the charge and spin ZTs, with the low-height (high-height) pair located on the side of the negative (positive) Fermi energy. At temperature 300 K, the extrema of charge (spin) ZTs remained above 22 (90) for different doping concentrations and could be further enhanced at lower temperatures. These findings suggest that Cr-doped blue phosphorene could be a versatile high-performance material for thermoelectric and spin caloritronic applications.
Article
Nanoscience & Nanotechnology
Na Liu, Huihui Zhu, Yulin Feng, Sicong Zhu, Kailun Yao, Saiyu Wang
Summary: In this study, the electronic structures and spin-dependent transport properties of vanadium-doped zigzag phosphorene nanoribbons (ZPNRs) were investigated using first-principles calculations and nonequilibrium Green's function approach. The ZPNRs were found to transition from nonmagnetic metals to magnetic metals or half-metals by different doping positions, which resulted from the hybridization among different electron orbitals under the crystal field. Additionally, a robust negative differential resistance effect was observed in all studied devices, along with a perfect spin-filter effect with almost 100% spin polarization under low bias. The transport properties were analyzed in detail based on the transmission spectrum and molecular energy levels. These findings suggest the potential applications of vanadium-doped ZPNRs as multi-functional spintronic devices.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Review
Nanoscience & Nanotechnology
Maciej R. Molas, Lukasz Macewicz, Aleksandra Wieloszynska, Pawel Jakobczyk, Andrzej Wysmolek, Robert Bogdanowicz, Jacek B. Jasinski
Summary: This study provides a detailed evaluation of photoluminescence (PL) as a comprehensive tool for phosphorene characterization, emphasizing its prominent quantitative role in providing fingerprint-like features due to extreme sensitivity to band structure details, anisotropy, disorder, and external fields. It reviews the effects of factors such as number of layers, dimensionality, structural and chemical disorder, and environmental factors on phosphorene's PL signal, as well as elaborates on the applications of PL in monitoring phosphorene and its modifications in various fields such as chemical and biosensing, nanomedicine, and solar energy harvesting.
NPJ 2D MATERIALS AND APPLICATIONS
(2021)
Article
Multidisciplinary Sciences
Jing-Jing Xian, Cong Wang, Jin-Hua Nie, Rui Li, Mengjiao Han, Junhao Lin, Wen-Hao Zhang, Zhen-Yu Liu, Zhi-Mo Zhang, Mao-Peng Miao, Yangfan Yi, Shiwei Wu, Xiaodie Chen, Junbo Han, Zhengcai Xia, Wei Ji, Ying-Shuang Fu
Summary: Researchers have successfully fabricated monolayers of CrTe2 and demonstrated antiferromagnetic ordering with spin reorientation under finite magnetic fields. This study enriches our understanding of two-dimensional magnetic materials and provides a foundation for further analysis.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
I. A. Armijo, R. E. Arias
Summary: This study investigates the relation between surface properties of ferromagnetic films and the propagation of spin waves. The frequencies of spin waves are experimentally determined and their relation with surface properties validates and derives parameters of models. Different parameters are varied to test the relation, and the effects of surface properties on spin waves are significant for certain angles of inclination of the applied magnetic field. The results have important implications for defining film thickness and understanding the influence of spin waves.
Article
Nanoscience & Nanotechnology
Jie Gong, Lu Li, Xiaoying Zhou, Benhu Zhou, Benliang Zhou
Summary: The study showed that specific strains can close the band gap of multilayer phosphorene nanoribbons, leading to the appearance of peaks. The band gaps of all APNRs are linearly dependent on the strain, but four layer APNRs are most sensitive to it.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Nanoscience & Nanotechnology
Zuolun Chen, Xiang Liu, Jiawei Jiang, Rui Li, Yue Wang, Liu Guo, Yingdan Xu, Wenbo Mi
Summary: The integration of ferromagnetic/antiferromagnetic bilayers with exchange bias effect on flexible substrates is crucial for flexible spintronics. Here, the epitaxial Co/MnN bilayers are deposited on mica by facing-target sputtering. A large in-plane exchange bias field (HEB) of 1800 Oe with a coercive field (HC) of 2750 Oe appears in the Co (3.8 nm)/MnN (15.0 nm) bilayer at 5 K after field cooling from 300 to 5 K. Effective interfacial exchange energy Jeff of the Co/MnN bilayer is 0.83 erg/cm2. The strain-induced maximum increase of HEB and HC reaches 18% and 21%, respectively, in the Co(3.8 nm)/MnN(15.0 nm) bilayer. Strain-modulated HEB is attributed to the change of interfacial exchange coupling between Co and MnN layers. HEB is inversely proportional to Co thickness but independent of MnN thickness. The change of HEB is less than 5% after 100 bending cycles, indicating mechanical durability.。
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Zhenxian Zhao, Xianghui Duan, Xiaotian Fang, Xiaocha Wang, Wenbo Mi
Summary: In this study, the electronic structure and magnetic anisotropy of a series of two-dimensional transition metal nitride monolayers (MSi2N4) were systematically analyzed. It was found that ScSi2N4 and VSi2N4 monolayers exhibit half-metallic properties, while TiSi2N4 and CrSi2N4 monolayers are semiconductors. The remaining monolayers are metallic. By applying strain, the metallic monolayers can be transformed into half-metallic or semiconductor ones. Two-dimensional materials with half-metallic abundance and perpendicular magnetic anisotropy have potential applications in spintronic devices.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Ze-Yu Zhang, Jia-Wei Jiang, Xiao-Hui Shi, Xiang Liu, Xia Chen, Zhi-Peng Hou, Wen-Bo Mi
Summary: The spin-dependent transport properties of Pt/Mn4N bilayers on MgO (001) substrates have been systematically investigated. The results show that the Hall resistivity of the bilayers is strongly dependent on temperature, applied current intensity, Mn4N and Pt layer thicknesses. The temperature-dependent sign reversal of the anomalous Hall resistivity is dominated by the competition between the magnetic proximity and spin Hall effects. Furthermore, the magnitude of the anomalous Hall resistivity can be manipulated by applied current density.
Review
Chemistry, Multidisciplinary
Jiawei Jiang, Wenbo Mi
Summary: This review provides a comprehensive overview of the emergent physical properties of magnetic Janus monolayers and their van der Waals heterostructures from a theoretical point of view. The review introduces theoretical methodologies, including state-of-the-art methods and challenges and limitations in validations for the descriptions of magnetic ground states and thermodynamic properties in magnetic materials. The inherent polarization field induced physical phenomena of magnetic Janus monolayers and the tunable electronic and magnetic properties of their heterostructures are discussed.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
Yingdan Xu, Yin Xiao, Yong Wang, Wenbo Mi
Summary: Chiral-induced spin selectivity effect provides a new strategy for manipulating electron spin, which can be used to control spin-selective electronic transport and photocurrent response. Chiral magnetic tunnel junctions have the ability to switch spin channels and photocurrent directions.
CHEMISTRY OF MATERIALS
(2023)
Article
Physics, Applied
Dongyao Zhang, Jiawei Jiang, Rui Li, Wenbo Mi
Summary: Polycrystalline iron tin nitride films were deposited on different substrates with various nitrogen flow rates using the facing-target reactive sputtering method. Epitaxial Fe3SnN(111) films were successfully fabricated on Al2O3(0001) and MgO(111) with a nitrogen flow rate of two standard cubic centimeter per minute. The structures, electronic transport, and magnetic properties were systematically investigated. The temperature-induced transition of charge carriers from electron to hole was observed and the skew scattering mechanism was found to dominate the anomalous Hall effect in the Fe3SnN(111) epitaxial film.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Yue Wang, Jiawei Jiang, Ji-Jun Zou, Wenbo Mi
Summary: This study successfully fabricated 200 μm single-crystal 2D MOFs and studied their electronic, magnetic, and catalytic properties using first-principles calculations. The results showed that different transition metal 2D MOFs have different properties, providing candidates for the study of spintronics and electrocatalysts.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ying Cui, Jiawei Jiang, Wenbo Mi, Yin Xiao
Summary: We report the fabrication of a five-layer chiral perovskite nanowire and its regulation of polarity preference using chiral phenylethylamine or 2-butylamine as chiral ligands. The chiroptical response of the nanowire is governed by the localized surface chiral potential related to the ligand-induced helical distortion of [PbX6]4- octahedra on the top and bottom layers. By varying the ligand's type or concentration, an optical enantiomeric pair is created, unlocking high-n chiral perovskite nanostructures and providing an additional degree of freedom beyond configurational chirality in regulating polarity.
CELL REPORTS PHYSICAL SCIENCE
(2023)
Article
Chemistry, Physical
Xueping Fan, Jiawei Jiang, Rui Li, Liu Guo, Wenbo Mi
Summary: The band alignment, intrinsic ferromagnetism, Dzyaloshinskii-Moriya interaction, magnetic anisotropy, and critical temperature (TC) of a GdI2/GeC van der Waals (vdW) heterostructure were systematically investigated. The heterostructure exhibited Type-I band alignment, large in-plane magnetic anisotropy energy (MAE) of -0.912 mJ/m2, and a high critical temperature of 466 K. Under biaxial strains, the heterostructure transformed from a semiconductor into a metal, with the easy magnetization axis remaining in-plane and TC increasing. These findings suggest potential applications of the GdI2/GeC vdW heterostructure in spintronic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Applied
Zhenxian Zhao, Xiaocha Wang, Wenbo Mi
Summary: In this paper, the electronic structure and magnetic properties of 2D vdW ScSi2N4/CuInP2S6 heterostructure were investigated using first-principles calculations, and it was found that the biaxial strains can modulate its properties. The potential of this heterostructure in spintronic devices was demonstrated.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Multidisciplinary Sciences
Minhua Ai, Lun Pan, Chengxiang Shi, Zhen-Feng Huang, Xiangwen Zhang, Wenbo Mi, Ji-Jun Zou
Summary: The study finds that chiral structure in zinc oxide can induce spin selectivity effect to promote photocatalytic performance. By synthesizing zinc oxide crystals using chiral methionine molecules, hierarchical chirality is demonstrated, and it is shown that the chiral structure acts as spin filters and induces spin polarization in photoinduced carriers. The chiral zinc oxide exhibits significantly higher activities in photocatalytic O-2 production and contaminant photodegradation compared with achiral zinc oxide.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Kai Zhang, Xiaocha Wang, Wenbo Mi
Summary: The ferromagnetic GdClBr monolayer in GdClBr/CuBiP2Se6 transforms from a semiconductor to a half-metal during the reversal of the ferroelectric polarization of CuBiP2Se6. The GdClBr/CuBiP2Se6 heterojunction exhibits perpendicular magnetic anisotropy regardless of the direction of ferroelectric polarization, and shows potential applications in spintronic devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Review
Chemistry, Multidisciplinary
Yingdan Xu, Wenbo Mi
Summary: This article summarizes the important discoveries and recent experiments performed during the development of the chiral-induced spin selectivity (CISS) effect, which provides a new strategy for manipulating electron's spin and understanding spin selective processes in organisms. Furthermore, it discusses the mechanisms, theoretical calculations, experimental techniques, and biological significance of the CISS effect.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
Liu Guo, Rui Li, Jiawei Jiang, Xueping Fan, Ji-Jun Zou, Wenbo Mi
Summary: CO2 reduction reactions (CO2RRs) are a promising strategy for effective capture and conversion of CO2. In this study, the electronic structure of TM-Mo2C catalysts and their performance in CO2 reduction were investigated. TM doping enhanced CO2 capture and activation abilities, while also promoting the adsorption of CHOH/CH2O. The results provide insights into the relationship between spin up/down anti-bonding states filling and the reaction rate of CHO conversion into CH2O.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Bo Chen, Xiaocha Wang, Wenbo Mi
Summary: This study investigates the electronic and magnetic properties of 2D Janus Ni-trihalide monolayers using first-principle calculations. The research shows that these monolayers have two distinct magnetic ground states and two different orbital splits. By applying biaxial strain, the semimetal state of the monolayers can be tuned to a semiconductor or metallic state, and the easy magnetization direction can also be changed. The design of the Janus Ni2X3Y3 structure expands the range of 2D magnetic materials and contributes to the advancement of spintronics and its applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(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)
