Article
Chemistry, Physical
Stefan Michalik, Zuzana Molcanova, Michaela Sulikova, Katarina Kusnirova, Pal Jovari, Jacques Darpentigny, Karel Saksl
Summary: The Mg-Zn-Ca system was investigated for its glass-forming ability by fabricating ribbon specimens using melt-spinning technique with a concentration line of 7 at.% calcium. The samples were characterized to determine their mass density, hardness, elastic modulus, and crystallisation temperatures. Pair distribution functions obtained by HEXRD and ND measurements described the amorphous structure, revealing contributions of Mg-Mg, Mg-Zn, and Zn-Zn pairs. In situ HEXRD showed the transformation process from amorphous to crystalline structure for Mg60Zn33Ca7 and Mg50Zn43Ca7, proposing the formation of intermetallic compounds IM1 and IM3 as well as hcp-Mg phase in multiple crystallisation events.
Article
Materials Science, Multidisciplinary
Y. H. Meng, S. Y. Zhang, W. H. Zhou, J. H. Yao, S. N. Liu, S. Lan, Y. Li
Summary: Structural relaxation and subsequent rejuvenation through thermal treatment can improve the plasticity and fracture toughness of metallic glasses. The recovery of loosely packed regions in the atomic structure during annealing contributes to the observed rejuvenation. Tailoring the mechanical properties of metallic glasses can be achieved by controlling the annealing and thermal treatment conditions.
Article
Chemistry, Physical
Andrea Lachova, Mihai Stoica, Stefan Michalik, Petre F. Gostin, Masako Fujioka-Kobayashi, Benoit Schaller, Joerg F. Loeffler, Pavol Sovak
Summary: Different geometries (wedges, rods, ribbons, and discs) of Ti40Zr10Cu32Pd14Ga4 and Ti40Zr10Cu32Pd14Sn4 bulk metallic glasses (BMGs) were prepared using suction casting, melt spinning, and splat quenching methods. X-ray diffraction measurements showed that the critical casting thickness of the Sn-containing BMG is at least 4 mm, higher than the Ga-containing BMG (2.1 mm) and the reference BMG (2.4 mm). Differential scanning calorimetry revealed a larger supercooled liquid region for glassy rods and ribbons compared to splat-quenched discs. The mechanical properties showed that the Ga-containing BMG has a higher plastic strain and a lower Young's modulus than the Sn-containing BMG and the reference BMG. Corrosion tests demonstrated that Ti40Zr10Cu32Pd14Sn4 has the highest pitting resistance among the BMGs tested. The Ga-containing BMG showed excellent biocompatibility.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Carlo Alberto Biffi, Jacopo Fiocchi, Mauro Coduri, Ausonio Tuissi
Summary: The study found that increasing Al content reduces the amount of CuZr phase transformation and promotes the formation of secondary phases. Higher Al content leads to lower MT temperatures and enthalpies, with implications for mechanical properties.
Article
Materials Science, Multidisciplinary
Soban Muddassir Dar, Yutao Zhao, Xizhou Kai, Zhuangzhuang Xu
Summary: This study investigated the microstructures, mechanical properties, and strain hardening properties of 1 vol% and 2 vol% (Al3Zr/Al2O3 + ZrB2) nanoparticles reinforced 6016Al matrix composites, which were synthesized through in-situ chemical reaction and solidified under squeezing pressure. It was found that Fe-B-rich and AlB2 phase particles were also formed in addition to the reinforcement particles. The matrix of the 1 vol%-6016Al composite exhibited fine Mg2Si precipitates under high squeezing pressure, while the matrix of the 2 vol%-6016Al composite did not show such precipitates. The squeezed 1 vol%-6016Al composite also had a greater reduction in grain size compared to the squeezed 2 vol%-6016Al composite. The squeezed 6016Al matrix composites exhibited high strength, high ductility, and lower strain hardening effect in the aged state, which was different from monolithic 6016Al alloys.
MATERIALS CHARACTERIZATION
(2023)
Article
Materials Science, Multidisciplinary
Haiming Lu, Yao Tang, Fanheng Jiang, Panpan Wan, Haofei Zhou
Summary: Metallic glasses (MGs) are promising structural materials with high strength, large elastic strain limit and enhanced wear resistance. Numerous efforts have been devoted to investigating the effect of hydrostatic pressure on the mechanical properties and deformation mechanisms of MGs. This review discusses recent studies on pressure-dependent thermodynamic properties, mechanical strength, hardness, and elevated ductility of MGs. The findings deepen the understanding of pressure-dependent mechanical behaviors of MGs and point out the potential of tuning mechanical behaviors through stress engineering.
ACTA MECHANICA SOLIDA SINICA
(2023)
Article
Metallurgy & Metallurgical Engineering
Zeng Qiaoshi, Yin Ziliang, Lou Hongbo
Summary: Metallic glasses possess unique properties due to their densely packed and disordered atomic structures. Recent studies have shown polyamorphic transitions in metallic glasses, sparking excitement and interest in understanding their underlying mechanisms and property changes. These transitions offer new possibilities for tunable properties in materials science.
ACTA METALLURGICA SINICA
(2021)
Article
Chemistry, Physical
Stefan Michalik, Pal Jovari, Karel Saksl, Martin Durisin, Dusan Balga, Jacques Darpentigny, Michael Drakopoulos
Summary: Detailed information on the atomic arrangement of glassy Cu54Hf46, Cu61Hf39 and Cu69Hf31 alloys has been obtained through reverse Monte Carlo simulation using high-energy X-ray diffraction and neutron diffraction data. Cu-centered clusters exhibit stronger ordering compared to Hf-centered clusters, and Cu54Hf46 and Cu61Hf39 have better glass forming ability than Cu69Hf31.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Sergio Scudino, Junhee Han, Rub Nawaz Shahid, Dina Bieberstein, Thomas Gemming, Jon Wright
Summary: Shear bands are nanoscale planar shear defects that mediate plasticity in metallic glasses. The understanding of shear banding requires three-dimensional characterization, which was not possible until now due to the inability of X-ray absorption tomography to distinguish shear bands from the surrounding matrix. However, this study overcomes this limitation by using the strain field generated by shear bands as a local probe for X-ray diffraction tomography.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Mechanical
Wei-Hui Lin, Chong-Min She, Chun-Yu Zhang, Paulo S. Branicio, Zhen - Dong Sha
Summary: The mechanical properties of cellular metallic glasses are influenced by the shape of their cellular structures. Random structures with uniform porosity show higher yield strength and Young's modulus compared to microlattice structures. The chiral structure displays the highest Young's modulus, while stochastic cellular structures exhibit higher energy absorption capacity.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Multidisciplinary Sciences
Luyao Li, Xin Li, Zhiyuan Huang, Jinbiao Huang, Zehang Liu, Jianan Fu, Wenxin Wen, Yu Zhang, Shike Huang, Shuai Ren, Jiang Ma
Summary: Joining metals under liquid has significant implications in various industries and applications. This study presents a method to successfully join different metallic glasses under water, seawater, alcohol, and liquid nitrogen, enabling efficient and strong connections even in extreme environments.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
D. V. Louzguine-Luzgin, Yu. P. Ivanov, A. L. Greer
Summary: The crystallization behavior of a Cu58Y37Sc5 metallic glassy alloy was investigated using various methods. Differential scanning and isothermal calorimetries were performed to study the phase transformations. X-ray diffractometry studies showed the simultaneous formation of Cu2Y, CuY, and CuSc crystalline phases, indicating eutectic crystallization, while the isothermal crystallization kinetics corresponded to primary crystallization. Transmission electron microscopy observations revealed a complex crystallization process involving heterogeneous nucleation on pre-existing particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Zheng Sun, Wenxu Liu, Qiuyang Li, Zhi Tao, Yemei Han
Summary: Introducing Bi(Zn2/3Nb1/3)O-3 successfully improved the dielectric performance of (1-x) BZT20-xBZN composite ceramics, with sample 0.94BZT20-0.06BZN exhibiting enhanced dielectric constants and a higher degree of relaxor behavior (γ=1.91).
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Tianding Xu, Xiao-Dong Wang, Eric M. Dufresne, Yang Ren, Qingping Cao, Dongxian Zhang, Jian-Zhong Jiang
Summary: Anomalous fast atomic dynamics were discovered in a metallic glass with good glass forming ability, mainly attributed to the increased mobility of Cu atoms by Ag addition, leading to the formation of structural heterogeneity at the atomic level.
MATERIALS TODAY PHYSICS
(2021)
Review
Materials Science, Multidisciplinary
Navid Sohrabi, Jamasp Jhabvala, Roland E. Loge
Summary: Bulk Metallic Glasses (BMG) are metallic alloys with the ability to solidify in an amorphous state, showing enhanced properties. However, conventional methods for producing BMGs are limited. Additive manufacturing techniques may provide a potential solution to overcome these limitations.
Article
Physics, Applied
J. de Rojas, A. Quintana, G. Rius, C. Stefani, N. Domingo, J. L. Costa-Kraemer, E. Menendez, J. Sort
Summary: Magneto-ionics is an emerging field in materials science that utilizes voltage-driven ion transport to control magnetic properties. This article provides an overview of the development and key research areas of magneto-ionics, focusing on the structural-ion approach and the use of nitrogen as a mobile ion. The potential applications in patterned systems and the future prospects of magneto-ionics are also discussed.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
S. Leila Panahi, Jordina Fornell, Catalin Popescu, Eloi Pineda, Jordi Sort, Pere Bruna
Summary: New high-entropy metallic glasses were produced by adding B and Si to the Fe25Co25Cr25Ni25 high entropy alloy, resulting in extremely hard materials through structural relaxation and nanocrystallization. The study explored the effects of composition and annealing treatments on structure and mechanical properties, finding that the relative amount of B and Si determines the main nanocrystalline phase and influences mechanical behavior.
Article
Nanoscience & Nanotechnology
Piotr Bazarnik, Aleksandra Bartkowska, Yi Huang, Karol Szlazak, Boguslawa Adamczyk-Cieslak, Jordi Sort, Malgorzata Lewandowska, Terence G. Langdon
Summary: This study presents a method of utilizing high-pressure torsion (HPT) to fabricate a novel hybrid material by direct bonding of aluminum and titanium disks at room temperature. Detailed structural observations reveal the formation of a multi-layered nanostructure in the edge regions of the disks, which leads to exceptional hardness in the hybrid material. The investigation highlights the potential of HPT processing for diffusion bonding, mechanical joining technologies, and the fabrication of valuable hybrid nanomaterials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Sofia Martins, Julius de Rojas, Zhengwei Tan, Matteo Cialone, Aitor Lopeandia, Javier Herrero-Martin, Jose L. Costa-Kramer, Enric Menendez, Jordi Sort
Summary: Reducing the thickness of paramagnetic cobalt oxide films can achieve sub-second ON-OFF magnetic transitions, with cumulative magneto-ionic effects generated by applying voltage pulses at frequencies as high as 100 Hz. Neuromorphic-like dynamic effects occur at these frequencies, mimicking many of the biological synapse functions.
Article
Nanoscience & Nanotechnology
Andrea Bonaccini Calia, Eduard Masvidal-Codina, Trevor M. Smith, Nathan Schafer, Daman Rathore, Elisa Rodriguez-Lucas, Xavi Illa, Jose M. De la Cruz, Elena Del Corro, Elisabet Prats-Alfonso, Damia Viana, Jessica Bousquet, Clement Hebert, Javier Martinez-Aguilar, Justin R. Sperling, Matthew Drummond, Arnab Halder, Abbie Dodd, Katharine Barr, Sinead Savage, Jordina Fornell, Jordi Sort, Christoph Guger, Rosa Villa, Kostas Kostarelos, Rob C. Wykes, Anton Guimera-Brunet, Jose A. Garrido
Summary: Flexible neural probes made of graphene microtransistors can record a wide range of brain signals, from DC shifts to high-frequency activity, showing potential for epilepsy research. This technology allows stable and chronic recordings of various brain signals, benefiting both preclinical and clinical applications.
NATURE NANOTECHNOLOGY
(2022)
Article
Chemistry, Applied
Roberto Fagotto Clavijo, Marta Riba-Moliner, Arantzazu Gonzalez-Campo, Jordi Sort, Eva Pellicer, Konrad Eiler
Summary: Highly porous Ni films were synthesized using custom-made PS-b-P4VP block copolymer micelles as a soft template. The Ni films exhibited large pores with diameters varying from 25 to 600 nm (1:1) and from 10 to 230 nm (1:4). Compared to dense Ni films and highly mesoporous Ni films with monodisperse 10 nm wide pores, the porous Ni films showed significantly improved electrocatalytic performance for hydrogen evolution reaction (HER) in alkaline media, with lower overpotential and better long-term stability.
Article
Chemistry, Multidisciplinary
Arnon Fluksman, Aritz Lafuent, Zhi Li, Jordi Sort, Silvia Lope-Piedrafita, Maria Jose Esplandiu, Josep Nogues, Alejandro G. Roca, Ofra Benn, Borja Sepulveda
Summary: In this study, metal iron based magnetoplasmonic drug-loaded nanocapsules (MAPSULES) were developed to enhance the efficacy of cancer nanotherapies locally. The MAPSULES combine powerful external magnetic concentration in the tumor and efficient photothermal actuation to boost the drug therapeutic action at ultralow drug concentrations. The results show that this approach has the potential to significantly amplify the therapeutic effects of drugs for different diseases.
Article
Chemistry, Multidisciplinary
Zhengwei Tan, Julius de Rojas, Sofia Martins, Aitor Lopeandia, Alberto Quintana, Matteo Cialone, Javier Herrero-Martin, Johan Meersschaut, Andre Vantomme, Jose L. Costa-Kramer, Jordi Sort, Enric Menendez
Summary: Magneto-ionics is a promising technology for energy-efficient spintronics, but the post-stimulated behavior of magneto-ionic systems is not well-controlled. In this study, we demonstrate a voltage-controllable N ion accumulation effect on the outer surface of CoN films, allowing for control of magneto-ionic properties during and after voltage pulse actuation. This effect has potential applications in neuromorphic computing, such as post-stimulated neural learning.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Deepti Raj, Gabriele Barrera, Federico Scaglione, Federica Celegato, Matteo Cialone, Marco Coisson, Paola Tiberto, Jordi Sort, Paola Rizzi, Eva Pellicer
Summary: Dense and mesoporous FePd nanowires were successfully fabricated using template- and micelle-assisted pulsed potentiostatic electrodeposition. The structural and magnetic properties of the nanowires were investigated, and it was found that the mesoporous core and dense shell structure slightly affected the magnetic properties. Moreover, the mesoporous nanowires showed excellent performance as SERS substrates for the detection of 4,4'-bipyridine, attributed to the mesoporous morphology and the close proximity of the embedded nanowires enabling localized surface plasmon resonance.
Article
Chemistry, Physical
Sofia Martins, Zheng Ma, Xavier Solans-Monfort, Mariona Sodupe, Luis Rodriguez-Santiago, Enric Menendez, Eva Pellicer, Jordi Sort
Summary: This study improves the magneto-ionic performance of electrolyte-gated cobalt oxide thin films by adding inorganic salts. The simulations show that potassium iodide favors the accumulation of positive charge on the cobalt oxide surface. The experiments demonstrate a significant enhancement of room temperature magneto-ionics in cobalt oxide films with the presence of potassium iodide in the electrolyte.
NANOSCALE HORIZONS
(2022)
Article
Nanoscience & Nanotechnology
P. Monalisha, Zheng Ma, Eva Pellicer, Enric Menendez, Jordi Sort
Summary: This study exploits voltage-driven nitrogen ion motion in transition metal nitride thin films to emulate biological synapses, achieving distinct multilevel non-volatile magnetic states and successfully simulating essential synaptic functionalities of the human brain. The device exhibits excellent synaptic properties and is suitable for hardware implementation of neuromorphic computing.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Muireann de h-Ora, Aliona Nicolenco, P. Monalisha, Tuhin Maity, Bonan Zhu, Shinbuhm Lee, Zhuotong Sun, Jordi Sort, Judith MacManus-Driscoll
Summary: Tuning the properties of magnetic materials through voltage-driven ion migration allows for energy-efficient and non-volatile magnetic memory and neuromorphic computing. We demonstrated significant changes in magnetic moment and coercivity in an array of CFO nanopillar electrodes with an applied voltage, along with fast magneto-ionic response and high cyclability. The magnetic switching is attributed to the modulation of oxygen content in CFO, and the self-assembled nanopillar structures emulate various synaptic behaviors for analog computing and high-density storage. CFO nanopillar arrays have the potential to be used as interconnected synapses for advanced neuromorphic computing applications.
Article
Multidisciplinary Sciences
Zheng Ma, Laura Fuentes-Rodriguez, Zhengwei Tan, Eva Pellicer, Llibertat Abad, Javier Herrero-Martin, Enric Menendez, Nieves Casan-Pastor, Jordi Sort
Summary: Magneto-ionics is a unique approach to control magnetism with electric field. This study demonstrates wireless control of magnetism through induced polarization in conducting materials, providing a new pathway for voltage-driven magnetism control. The results have potential applications in various fields such as bioelectronics, catalysis, neuromorphic computing, and wireless communications.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Aleksandra Bartkowska, Oriol Careta, Adam Benedict Turner, Andreu Blanquer, Elena Ibanez, Margarita Trobos, Carme Nogues, Eva Pellicer, Jordi Sort
Summary: Porous FeMn(-xAg) alloys were fabricated through powder metallurgy methods. The effects of porosity and Ag addition on the microstructure, biodegradability, magnetic and mechanical properties of the alloys were investigated. Cytocompatibility, inflammatory cytokine response, and antibacterial effect studies were also conducted. The fabricated alloys exhibited a macro- and nanoporous structure with uniformly distributed silver particles. The biodegradability tests showed higher release of Mn compared to Fe, without significant differences between the alloys. The degradation products mainly consisted of Fe, Mn, O, and compounds enriched in Ca, P, and Cl. The as-sintered alloys showed low saturation magnetization values, which did not significantly increase with immersion time. The biocompatibility results indicated that all tested alloys were non-cytotoxic, but the addition of Ag might interfere with cell proliferation. However, the ions released by the FeMn(-xAg) alloys did not induce an inflammatory response in macrophages. The obtained results on microbiological interactions revealed a significant reduction in the total biofilm biomass of both live and dead bacteria after 24 hours in Ag containing FeMn-5Ag surfaces, although no significant bactericidal effect was observed at 4 hours between FeMn control and FeMn-5Ag.
MATERIALS ADVANCES
(2023)
Article
Automation & Control Systems
Jiaen Wu, David Folio, Jiawei Zhu, Bumjin Jang, Xiangzhong Chen, Junxiao Feng, Pietro Gambardella, Jordi Sort, Josep Puigmarti-Luis, Olgac Ergeneman, Antoine Ferreira, Salvador Pane
Summary: In this study, catalytic Janus micromotors with magnetic steering were fabricated, and a dynamic model was developed to predict the motion trajectory of micromotors in fluid. The model is applicable to motors of different sizes, geometries, and materials, and can be used for biosensing, fuel concentration detection, and other applications.
ADVANCED INTELLIGENT SYSTEMS
(2022)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
