Article
Chemistry, Physical
Daria Lazurenko, Victor V. Lozanov, Andreas Stark, Florian Pyczak, Alexey A. Ruktuev, Kemal Emurlaev, Lin Song, Ivan A. Bataev, Ivan Ivanov, Tatiana S. Ogneva, Anatoly A. Bataev
Summary: Ti-Al3Ti composites have attracted attention for their outstanding mechanical properties, but limited by the low ductility and fracture toughness of Al3Ti phase. This study discusses stabilizing the L1(2) structure of titanium trialuminide as a promising way to improve composite properties, with Zn and Ag found to be the most efficient stabilizers.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
N. E. Volkova, M. Bazueva, D. T. Aisarinova, A. D. Alkhamova, L. Ya Gavrilova, V. A. Cherepanov, A. Maignan
Summary: The study investigated 96 samples in the Ba1-xPrxFe1-yCoyO3-delta system, establishing the compositional boundaries of stability for three types of crystal structure. The cubic and orthorhombic perovskites' unit cell parameters were refined, and the oxygen content was found to increase with Pr and Fe contents. A pseudo-phase diagram outlining the stability ranges for all three types of complex oxides was generated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Iurii Dovgaliuk, Irena Senkovska, Xiao Li, Vadim Dyadkin, Yaroslav Filinchuk, Dmitry Chernyshov
Summary: Using in situ powder X-ray diffraction, this study evaluated the intracrystalline diffusion scenarios of Ar, Kr, and Xe adsorption by nanoporous gamma-Mg(BH4)(2). Different noble gas molecules exhibit varying diffusion pathways within the crystal structure, influenced by their kinetic diameter and temperature. The results indicate that smaller Ar atoms diffuse equally through both intra- and interchannel apertures, while medium sized Kr molecules show contributions from two parallel transport mechanisms and larger Xe atoms primarily diffuse along 1D channels with the highest barrier.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Ceramics
Tatiana Aksenova, Nadezhda E. Volkova, Antoine Maignan, Vladimir A. Cherepanov
Summary: The phase equilibria in the 1/2Nd(2)O(3)-BaO-1/2Fe(2)O(3) system were studied, and the crystal structure and oxygen content of different intermediate oxides were determined. The substitution of neodymium by barium was found to decrease the oxygen content and influence the thermal properties.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Elis Sjogren-Levin, Wolfgang Pantleon, Aylin Ahadi, Zoltan Hegedus, Ulrich Lienert, Nobuhiro Tsuji, Kei Ameyama, Dmytro Orlov
Summary: In situ X-ray diffraction was used to study the tensile deformation behavior of HS nickel, which consists of a continuous network of fine grains and islands of coarse grains. A separation algorithm was developed to analyze the X-ray diffraction signals from coarse and fine grains separately. Line profile analysis was used to examine the evolution of local stresses and microstrains in different grain fractions. The study identified several stages during yielding and the onset of plastic deformation in HS nickel, and found that the plastic deformation of coarse grains is constrained by the network of fine grains.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Huajie Luo, Shiyu Tang, Hui Liu, Zheng Sun, Baitao Gao, Yang Ren, He Qi, Shiqing Deng, Houbing Huang, Jun Chen
Summary: The structures of 6BT and 7BT ceramics were investigated, and the results show that their refined structures significantly affect their piezoelectric properties. The less pronounced structure distortion and oxygen octahedral tilting in 7BT contribute to an enhanced piezoelectricity.
JOURNAL OF MATERIOMICS
(2022)
Article
Chemistry, Physical
Nadezhda S. Smirnova, Evgeny Khramov, Igor P. Stolarov, Ilya A. Yakushev, Galina N. Baeva, Galina O. Bragina, Ekaterina Belova, Arcady Ishchenko, Anna S. Popova, Yan Zubavichus, Michael N. Vargaftik, Aleksander Y. Stakheev
Summary: This study thoroughly investigates the phase transformations of a newly synthesized heterobimetallic acetate in a chemically reductive atmosphere, with a focus on optimizing conditions for the formation of nanostructured PtZn intermetallic compound. Through a two-stage process, the formation of ordered PtZn intermetallic compound with a tetragonal structure is achieved in a narrow temperature range. The results provide insight into the optimum reduction temperature for the preparation of supported bimetallic Pt?Zn/Al2O3 catalyst.
Article
Chemistry, Physical
Bryce G. Mullens, Matilde Saura-Muzquiz, Frederick P. Marlton, Maxim Avdeev, Helen E. A. Brand, S. Mondal, G. Vaitheeswaran, Brendan J. Kennedy
Summary: Synchrotron X-ray powder diffraction methods were used to study the structures and doping effects of lanthanoid tantalates and orthoniobates, revealing different crystal structures and changes in atomic bond lengths. This provides important clues for understanding the properties and phase transitions of these compounds.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Metallurgy & Metallurgical Engineering
Youhong Peng, Kesong Miao, Wei Sun, Chenglu Liu, Hao Wu, Lin Geng, Guohua Fan
Summary: Characterizing the microstructure and deformation mechanism of metallic materials is crucial for understanding the microstructure-property relationship. Advanced synchrotron radiation facilities have enabled non-destructive visualization of full-field structural information in three dimensions, contributing to significant progress in recent decades. Future innovations in next-generation synchrotron radiation and emerging technologies hold great potential for further advancements in material characterization.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
L. V. Khvostova, N. E. Volkova, L. Ya. Gavrilova, A. Maignan, V. A. Cherepanov
Summary: A phase diagram of the 1/2 Gd2O3-SrO-1/2 Fe2O3 system was constructed at 1100 degrees C in air. Six types of phases were identified with different impacts on oxygen content within the oxides of the system. Oxygen content in the perovskitetype oxides gradually increases with Gd concentration, while significant changes in oxygen content are associated with higher Fe oxidation states in RP-type oxides.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Nicolas Madern, Judith Monnier, Jean -Claude Crivello, Junxian Zhang, Karine Provost, Valerie Paul-Boncour, Solenn Reguer, Dominique Thiaudiere, Michel Latroche
Summary: Various applications benefit from lanthanides-3d metals compounds due to their fundamental physicochemical properties. To overcome raw material criticality and geopolitical tension, a better understanding of ternary systems is required. This study focuses on the Mn-Ni-Sm system, which is useful for energy storage applications. The combination of different techniques provides a better understanding of the physicochemical properties and phase equilibrium of this system, including the substitution of Mn atoms in the Ni sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
D. V. Lazurenko, I. Yu. Petrov, V. I. Mali, M. A. Esikov, R. I. Kuzmin, V. V. Lozanov, F. Pyczak, A. Stark, G. D. Dovzhenko, I. A. Bataev, D. S. Terentiev, A. A. Ruktuev
Summary: This study aims to improve the brittleness issue of Ti-Al3Ti metal-intermetallic laminate composites by changing the crystal structure of Al3Ti to the more ductile L12 structure through alloying with silver. The optimal fabrication regimes of Ti-Ti(Al1-xAgx)3 composites were determined based on in-situ synchrotron X-ray diffraction analysis, leading to enhanced properties of the composite material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
V. Nikolov, R. Nikolova, N. Petrova, I. Koseva, N. Kuvandjiev
Summary: The pseudo-ternary system Li2O.MoO3-CaO-GeO2 was investigated, and the concentration and temperature ranges of crystallization of a new compound Li2CaGe6O14 were experimentally determined. Single crystals of this compound were successfully grown and its structure was solved using single crystal XRD investigation. The chemical composition was confirmed using electron probe microanalyses (EPMA) and solid state synthesis. DSC measurements and analyses of the Li2CaGe6O14 melting processes were conducted to understand its thermal behavior.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Inorganic & Nuclear
Ziyan Lv, Rukang Li
Summary: In this study, a tantalum phosphate crystal Na11Ta8P7O43 with a moderate second harmonic response was synthesized using self-fluxes method. The crystal was found to have unique structural features and moderate nonlinear effects. It exhibits phase-matchable second harmonic generation, a shorter cutoff edge than known materials LiTaO3 and KTiOPO4, and high transmittance in the visible to near infrared band, suggesting its potential as a nonlinear optical crystal.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ziyan Lv, Rukang Li
Summary: In this study, a tantalum phosphate crystal with a moderate second harmonic response and unique structural features was successfully synthesized. It has the potential to serve as a nonlinear optical crystal.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Alice Haddad do Prado, Jonatas Lobato Duarte, Leonardo Delello Di Filippo, Francesca Damiani Victorelli, Marcia Carvalho de Abreu Fantini, Rosangela Gonacalves Peccinini, Marlus Chorilli
Summary: Studies have shown that incorporating OMC into liquid crystal systems can improve its delivery to the skin and reduce its systemic absorption, thereby avoiding harmful effects. The surfactant-based systems developed in this study have great potential for delivering OMC to the skin effectively.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Biochemistry & Molecular Biology
Mario de Oliveira Neto, Adriano de Freitas Fernandes, Vassili Piiadov, Aldo Felix Craievich, Evandro Ares de Araujo, Igor Polikarpov
Summary: SAXSMoW is an online platform used for determining the molecular weights of proteins in dilute solutions based on scattering intensity from SAXS raw data. The updated version 3.0 accurately determines molecular weights of proteins, as tested against experimental results, showing good agreement with expected values.
Review
Chemistry, Multidisciplinary
Marcia Carvalho de Abreu Fantini, Cristiano Luis Pinto Oliveira, Jose Luiz de Souza Lopes, Tereza da Silva Martins, Milena Apetito Akamatsu, Aryene Goes Trezena, Milene Tino-De-Franco, Viviane Fongaro Botosso, Osvaldo Augusto Brazil Esteves Sant'Anna, Nikolay Kardjilov, Martin Kjaerulf Rasmussen, Heloisa Nunes Bordallo
Summary: This article summarizes the progress made in oral vaccine formulations using porous silica matrices for antigen encapsulation. These vaccine vehicles effectively protect the antigens from stomach acid and enhance immunity. The research conducted at the Butantan Institute in Brazil is highlighted, with a focus on optimizing antigen encapsulation yield and distribution inside the silica matrix. Structural characterization and modeling were performed using various techniques, revealing the efficacy and stability of the proposed oral immunogenic complex.
Article
Physics, Condensed Matter
C. L. P. Oliveira, J. L. S. Lopes, O. A. Sant'Anna, V. F. Botosso, H. N. Bordallo, M. C. A. Fantini
Summary: Ordered mesoporous silica is an efficient oral adjuvant for delivering a variety of antigens. It has shown promising results in inducing immune response for different antigens without toxicity. Physics methods have been used to characterize the material and determine the ideal antigen load and release rate for developing proper oral vaccines.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Physics, Condensed Matter
A. S. Cavichini, M. T. D. Orlando, M. C. A. Fantini, R. Tartaglia, C. W. Galdino, F. Damay, F. Porcher, E. Granado
Summary: The effect of electron doping on the magnetic and lattice parameters of Ca1-xYxMnReO6 compound is investigated. The results show that electron doping significantly enhances the ferromagnetic component of Mn spins, suppresses the antiferromagnetic component, and suppresses the lattice parameter anomalies observed in the parent compound. Electron doping also increases the magnetic ordering temperature.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Chemistry, Physical
Cintia Micaela Chamorro-Petronacci, Beatriz Santos Torres, Rocio Guerrero-Nieves, Mario Perez-Sayans, Marcia Carvalho-de Abreu Fantini, Luis Carlos Cides-da-Silva, Beatriz Magarinos, Berta Rivas-Mundina
Summary: Combining ordered mesoporous silica with antibiotics shows effective antimicrobial activity against Enterococcus faecalis in dental pulp treatment, while the use of minocycline leads to tooth discoloration.
Article
Chemistry, Physical
Daniel da Silva Costa, Guinther Kellermann, Aldo F. Craievich, Luciano A. Montoro, Camilla K. B. Q. M. Oliveira, Conrado R. M. Afonso, Cristian Huck-Iriart, Lisando J. Giovanetti, Felix G. Requejo, Igor G. Zanella, Irineu Mazzaro, Erico S. Szameitat, Rodrigo P. Cardoso
Summary: This article presents a characterization of a 2D nanocomposite, consisting of NiSi2 nanoplates, grown inside a single-crystalline Si wafer. The formation of well-oriented hexagonal nanoplates buried in the Si wafer and randomly oriented Ni nanocrystals in a doped SiO2 thin film is observed using high-resolution scanning transmission electron microscopy. The average thickness and maximum diameter of the NiSi2 nanoplates are determined to be 12 nm and 118 nm, respectively, while the average radius of Ni nanocrystals is 1.7 nm. The described fabrication process opens up possibilities for utilizing the structural features of these materials in devices requiring anisotropic electrical transport properties.
SURFACES AND INTERFACES
(2022)
Article
Pharmacology & Pharmacy
Tais de Cassia Ribeiro, Rafael Miguel Sabio, Marcela Tavares Luiz, Lucas Canto de Souza, Bruno Fonseca-Santos, Luis Carlos Cides da Silva, Marcia Carvalho de Abreu Fantini, Cleopatra da Silva Planeta, Marlus Chorilli
Summary: This study investigated the use of curcumin-loaded mesoporous silica nanoparticles (MSN-CCM) and a thermo-responsive hydrogel for the treatment of Alzheimer's disease (AD). The results showed that the MSN-CCM and hydrogel had excellent properties and high permeation values. In vivo studies confirmed the potential of the hydrogel-MSN-CCM formulation in reverting cognitive deficits in an AD model.
Article
Chemistry, Physical
Manouchehr Nadjafi, Yifan Cui, Marlon Bachl, Alexander Oing, Felix Donat, Giancarlo Luongo, Paula M. Abdala, Alexey Fedorov, Christoph R. Mueller
Summary: The oxidative dehydrogenation of propane can occur through a gas-solid interface or in the gas phase via a radical chain process. This study found that an empty quartz reactor can achieve high propene and ethene selectivities and propane conversions comparable to those of state-of-the-art ODP catalysts. Optimizing the post-catalytic volume of a h-BN catalyst bed can increase propane conversion and propene selectivity, indicating it as an important variable for improving catalytic ODP performances.
Article
Multidisciplinary Sciences
Margarita Rekhtina, Maximilian Krodel, Yi-Hsuan Wu, Agnieszka Kierzkowska, Felix Donat, Paula M. Abdala, Christoph R. Muller
Summary: The structural dynamics of a NaNO3-promoted, MgO-based CO2 sorbent were investigated using in situ time-resolved powder x-ray diffraction. The sorbent initially deactivates due to an increase in MgO crystallite size, reducing the availability of nucleation points for MgCO3 growth. However, after the third cycle, the sorbent shows continuous reactivation, attributed to the in situ formation of Na2Mg(CO3)2 crystallites that act as seeds for MgCO3 nucleation and growth.
Article
Chemistry, Multidisciplinary
Annelies Landuyt, Priyank V. Kumar, Jodie A. Yuwono, Alexander H. Bork, Felix Donat, Paula M. Abdala, Christoph R. Mueller
Summary: MgO-based CO2 sorbents promoted with molten alkali metal nitrates have shown great potential for CO2 capture and storage technologies. The carbonation mechanism of these sorbents, especially when the promoter is in the molten state, has been investigated using O-18 isotope labeling experiments. Results suggest a fast oxygen exchange between CO2 and MgO through reversible formation of surface carbonates, and subsequent dissolution of these carbonates in the molten NaNO3 promoter.
Review
Chemistry, Multidisciplinary
Nora K. Zimmerli, Christoph R. Mueller, Paula M. Abdala
Summary: Heterogeneous catalysts are complex materials that require advanced structural characterization tools to determine structure-performance relationships. Pair distribution function (PDF) analysis is a powerful method for extracting structural information from the atomic to the nanoscale.
TRENDS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Zixuan Chen, Scott R. Docherty, Pierre Florian, Agnieszka Kierzkowska, Ilia B. Moroz, Paula M. Abdala, Christophe Coperet, Christoph R. Mueller, Alexey Fedorov
Summary: Catalysts with well-defined isolated Ni(ii) surface sites have been prepared on three different silica-based supports. The Ni catalysts with a higher density of strong Bronsted acid sites (BAS) show higher initial activity and productivity in the ethene-to-propene conversion. Propene productivity is closely related to the concentration of C-8 aromatics, suggesting the formation of propene via a carbon-pool mechanism. Furthermore, the deactivation of catalysts with Ni(ii) sites on AlOx can be reversed by calcination, while catalysts with Ni silicate or aluminosilicate sites irreversibly deactivate by forming Ni nanoparticles.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Alexey Kurlov, Dragos Stoian, Ali Baghizadeh, Evgenia Kountoupi, Evgeniya B. Deeva, Marc Willinger, Paula M. Abdala, Alexey Fedorov, Christoph R. Mueller
Summary: In this study, Mo2C nanobelts and Mo2C/SiO2 were synthesized through thermal carburization, and they exhibited excellent catalytic activity and stability in dry reforming of methane. The influence of Mo2C morphology and silica dispersion on the structural evolution and oxidation behavior of the catalysts under reaction conditions were investigated by in situ X-ray absorption spectroscopy.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Pedro Castro-Fernandez, Alexander I. Serykh, Alexander V. Yakimov, Igor P. Prosvirin, Andrey V. Bukhtiyarov, Paula M. Abdala, Christophe Coperet, Alexey Fedorov, Christoph R. Mueller
Summary: This work investigates how H-2 pretreatment at 550 degrees C affects the structural transformation and catalytic performance of two gallia-based propane dehydrogenation catalysts. The results show that the nanocrystalline gamma/beta-Ga2O3 phase in gamma-Ga2O3/SiO2-H-2 exhibits increased disorder and stronger Lewis acid sites compared to the calcined gamma-Ga2O3/SiO2 phase. Ga/SiO2-H-2, on the other hand, shows poor performance.
CATALYSIS SCIENCE & TECHNOLOGY
(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)