Article
Chemistry, Multidisciplinary
Dmitry V. Karpinsky, Maxim V. Silibin, Siarhei I. Latushka, Dmitry V. Zhaludkevich, Vadim V. Sikolenko, Hanan Al-Ghamdi, Aljawhara H. Almuqrin, M. I. Sayyed, Alexei A. Belik
Summary: The crystal structure and magnetic state of the (1 - x)BiFeO3-(x)BiMnO3 solid solution were analyzed. It was found that increasing the dopant concentration led to structural and magnetic transitions at room temperature, resulting in a two-phase structure. Irreversible temperature-driven structural transitions favored the stabilization of high-temperature structural phases.
Article
Chemistry, Physical
V Babizhetskyy, Ya Lomnytska, M. Dzevenko, C. Zheng, V Smetana, A- Mudring
Summary: The solid-state phase diagram of the ternary Ta-Ni-P system at T=1070 K was established using PXRD methods, with the identification of six ternary compounds and the discovery of various crystal structure types.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Multidisciplinary Sciences
S. Galeski, T. Ehmcke, R. Wawrzynczak, P. M. Lozano, K. Cho, A. Sharma, S. Das, F. Kuester, P. Sessi, M. Brando, R. Kuchler, A. Markou, M. Konig, P. Swekis, C. Felser, Y. Sassa, Q. Li, G. Gu, M. Zimmermann, O. Ivashko, D. Gorbunov, S. Zherlitsyn, T. Foerster, S. S. P. Parkin, J. Wosnitza, T. Meng, J. Gooth
Summary: A 3D quantum Hall effect has been observed in the Dirac semimetal ZrTe5 due to a magnetic-field-driven Fermi surface instability. The study shows evidence of quasi-quantized Hall response without Fermi surface instability, attributing it to the interplay between the intrinsic properties of ZrTe5 electronic structure and its Dirac semi-metallic character.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
V. B. Jayakrishnan, S. K. Mishra, A. B. Shinde, S. Wajhal, P. S. R. Krishna, P. U. Sastry
Summary: In this study, the phase stabilities of solid solution (1-x)NaNbO3-x(Na0.5Bi0.5)TiO3: xNBT were investigated using powder X-ray and neutron diffraction techniques. Changes in diffraction data suggest structural phase transitions with composition. The coexistence of different phases was observed for different composition ranges, indicating the first order nature of these phase transitions.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Ajay Kumar Kalyani
Summary: This study reports a non-classical approach to obtain morphotmpic phase boundaries (MPB) in piezoelectric materials by choosing end members with similar polar symmetry, leading to an enhanced piezoelectric response.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Zein K. Heiba, Lutfi Arda, Nurcan Dogan, Ozgul Karatas, Mohamed Bakr Mohamed
Summary: The sol-gel technique was used to synthesize Er2-xCoxO3 mixed oxides with varying Co concentrations. Rietveld analyses showed single phase nanoparticles up to x = 0.1, with Co3O4 phase appearing for x >= 0.2. The magnetic analysis revealed super-paramagnetism as the reason for S-shaped hysteresis loops and non-zero magnetic moments, with both Mr and Ms increasing with higher Co+2 concentrations.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Prachi Chaudhary, Rishabh Shukla, Samiksha Dabas, O. P. Thakur
Summary: This study investigates the effects of Nb substitution on the properties of a multiferroic solid solution, revealing significantly enhanced magnetic and dielectric properties in Nb-substituted samples, making them suitable for memory device applications. Additionally, changes in the structure and the coupling between electric and magnetic dipoles were confirmed through various analytical techniques.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Kim Eklund, Julia Alajoki, Antti J. Karttunen
Summary: In this study, the elastic properties of 97 binary d-metal oxides were systematically investigated using hybrid density functional methods. The calculated bulk moduli and elastic constants of most materials agree well with experimental results, but some discrepancies exist in certain cases.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Biochemistry & Molecular Biology
Anatolii V. Korneev, Alina R. Izatulina, Mariya A. Kuz'mina, Olga V. Frank-Kamenetskaya
Summary: This study investigates the crystal chemical features and precipitation behavior of natural and synthetic oxalates under biofilm mineralization conditions. By conducting experiments and using various analytical techniques, the crystal structures and phase transitions of lindbergite and glushinskite are characterized. The results have implications for the removal of metal ions from mixed media in bioremediation/bioleaching technologies.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
D. Hahn, A. Masoudi Alavi, P. Quirmbach
Summary: This study investigated the phase development of an aluminium phosphate bonded Al2O3-MgAl2O4 ceramic body using PXRD and MAS NMR spectroscopy. It found that Al(H2PO4)3 acts as a network forming component at high temperatures, playing a key role in the formation of phosphate bonds.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Inorganic & Nuclear
J. W. Ben Li, Brendan J. Kennedy
Summary: ALaTiO4 and A2La2Ti3O10 (A = Na+, K+) are prepared at similar temperatures and often coexist in poly-crystalline samples. The use of excess alkaline metal reagent compensates for reagent volatility and reduces the synthesis temperature. The phase competition between ALaTiO4 and A2La2Ti3O10 highlights the importance of careful profile analysis for complete understanding of sample phase composition.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Olesya Nakonechna, Mariana Tymoshenko, Yurii Titov, Nadezhda Belyavina
Summary: The study showed that Ga dopants significantly increase the corrosion resistance of copper at annealing in air, with the activation energy of oxidation increasing as the Ga content increases, and the oxidation rates decreasing by almost 100 times. The oxidation of Cu1-xGax powders results in the formation of Ga2O3, CuO, and CuGa2O4 phases.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Inorganic & Nuclear
M. N. Smirnova, M. A. Kop'eva, G. E. Nikiforova, A. D. Yapryntsev, G. D. Nipan
Summary: The study found that a homogeneous solid solution with an anatase structure can be synthesized through gel combustion with polyvinyl alcohol. Analysis of Ti1-x(BP)(x/2)O-2 series samples revealed the possibility of combined replacement of titanium atoms with boron and phosphorus in the anatase structure, leading to the construction of a corresponding phase diagram.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Pharmacology & Pharmacy
Laura Catenacci, Alexios I. Vicatos, Milena Sorrenti, Maria Cristina Bonferoni, Mino R. Caira
Summary: Pterostilbene is a natural compound with various biological and pharmacological activities. However, its low solubility limits its therapeutic use. This study investigated the feasibility of using cyclodextrins as solubility-enhancing agents for Pterostilbene.
Article
Engineering, Environmental
Yinghua Gong, Rais Mendgaziev, Wei Hu, Yingzhou Li, Zhi Li, Andrey S. Stoporev, Andrey Yu Manakov, Vladimir A. Vinokurov, Tianduo Li, Anton P. Semenov
Summary: This study systematically investigates urea as a promising and green gas hydrate inhibitor. Urea was found to decrease the equilibrium temperature of hydrates formation, acting as a thermodynamic hydrate inhibitor. Despite having medium anti-hydrate activity, urea is considered safer for the environment and more cost-effective compared to other compounds. Its application is justified if only a slight shift in the hydrate equilibrium curve is required.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
A. O. Selezen, I. D. Olekseyuk, G. L. Myronchuk, O. V. Smitiukh, L. V. Piskach
JOURNAL OF SOLID STATE CHEMISTRY
(2020)
Article
Materials Science, Multidisciplinary
R. B. Matviiv, M. Ya. Rudysh, V. Yo. Stadnyk, A. O. Fedorchuk, P. A. Shchepanskyi, R. S. Brezvin, O. Y. Khyzhun
Summary: The K2SO4:Cu2+(3%) crystal has been synthesized and its crystal structure characterized using X-ray diffraction method. Experimental data on refractive indices and birefringence were studied, showing good agreement with theoretical calculations. The electronic structure and optical spectra were calculated using density functional theory, and verified with X-ray photoelectron spectroscopy and X-ray emission spectroscopy.
CURRENT APPLIED PHYSICS
(2021)
Article
Optics
V. V. Halyan, V. O. Yukhymchuk, I. A. Ivashchenko, V. S. Kozak, P. Tyshchenko, I. D. Olekseyuk
Summary: Er-doped chalcohalide glasses were synthesized with AgCl(I)-Ga2S3-La2S3 systems, leading to changes in absorption properties and efficient emission in the near-infrared range. The addition of erbium resulted in the emergence of narrow absorption bands and promising potential for use in optical amplifiers and fiber optic networks. Additionally, concentration quenching was observed in certain systems with increased erbium content.
Article
Materials Science, Multidisciplinary
M. Ya Rudysh, P. A. Shchepanskyi, A. O. Fedorchuk, M. G. Brik, V. Yo Stadnyk, G. L. Myronchuk, E. A. Kotomin, M. Piasecki
Summary: The study reports detailed theoretical investigations on the CuGa(S1_xSex)2 solid solutions, revealing that an increase in selenium concentration leads to a decrease in band gap. The findings are important for designing smart chalcopyrite materials with desired properties.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Tuan V Vu, A. A. Lavrentyev, B. Gabrelian, A. O. Selezen, L. Piskach, Ivan D. Olekseyuk, G. L. Myronchuk, M. Denysyuk, V. A. Tkach, Nguyen N Hieu, Khang D Pham, O. Y. Khyzhun
Summary: Experimental results show that Tl2CdGeSe4 is a p-type conductor with a band gap energy of 1.52 eV and a non-direct material, confirmed by density functional theory (DFT) calculations. The DFT calculations reveal that the Se 4p states primarily contribute to the top of the valence band of Tl2CdGeSe4, while the crystal surface is found to be relatively stable when treated with middle-energy Ar+ ions and exhibits low hygroscopicity.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Tuan V. Vu, O. Y. Khyzhun, A. A. Lavrentyev, B. Gabrelian, V. Sabov, M. Y. Sabov, M. Y. Filep, A. Pogodin, I. E. Barchiy, A. O. Fedorchuk, B. Andriyevsky, M. Piasecki
Summary: In this study, a centimeter size crystal of silver- and bismuth-bearing selenophosphate, AgBiP2Se6, was grown for the first time by Bridgman technique and characterized via different experimental and theoretical techniques. The AgBiP2Se6 compound was found to have a well-defined layered structure and highly anisotropic optical constants, making it a promising optoelectronic semiconductor. Theoretical analysis revealed the dominance of Se p states in the upper section of the valence band, Ag d states in the central section, and P p states in the bottom section.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
O. P. Berezniuk, I. I. Petrus, I. D. Olekseyuk, O. Zamuruyeva, M. Skipalskiy
Summary: Phase equilibria and glass formation regions of the quasi-ternary systems Ag2S-(BS2)-S-IV-(C2S3)-S-V (B-IV- Ge, Sn; C-v-As, Sb) were investigated using phase analysis based on XRD. Glass formation regions were observed in the quasi-binary sections GeS2-As2S3 and GeS2-Sb2S3. The presence of tin in the systems resulted in smaller glass formation regions compared to the systems containing germanium, due to the change in coordination environment from tetrahedral to octahedral. Addition of As2S3 to germanium (IV) sulfide shifted the absorption edge to higher energies in the resulting glasses.
PHYSICS AND CHEMISTRY OF SOLID STATE
(2022)
Article
Nanoscience & Nanotechnology
O. Marchuk, O. Smitiukh, Yu Prots, A. O. Fedorchuk
Summary: The chalcogenides La2TbErPbSi2S8 were obtained by synthesizing elementary components in vacuum containers and annealing at 770K, with statistical mixture of (La, Tb, Er, Pb) atoms and Si atoms occupying different sites in the structure. The experimental results showed that the synthesized chalcogenides crystallize in the La2PbSi2S8 structure type.
PHYSICS AND CHEMISTRY OF SOLID STATE
(2021)
Article
Chemistry, Inorganic & Nuclear
I. A. Ivashchenko, I. D. Olekseyuk, L. D. Gulay, V. V. Halyan, A. H. Kevshyn, P. Tishchenko, O. M. Strok
Summary: X-ray diffraction and differential-thermal analysis methods were used to investigate the interaction between components in the Cu2S Ga2S3 - In2S3 system. The presence of the quaternary phase, CuGa(x)In(5-x)S(8), with a range of 1.4 <= x <= 2.05 at 820 K was confirmed. The crystal structure of the quaternary phase was determined, and a single crystal CuGa1.9In3.1S8 was successfully grown by solution-melt method for further analysis of its physical properties.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
O. Smitiukh, O. Marchuk, Y. M. Kogut, V. O. Yukhymchuk, N. Mazur, G. L. Myronchuk, S. M. Ponedelnyk, O. Cherniushok, T. O. Parashchuk, O. Y. Khyzhun, K. T. Wojciechowski, A. O. Fedorchuk
Summary: In this study, the effect of rare earth doping (Pr, Eu, Yb) on the crystal structure and optical properties of Ag3AsS3 crystals was investigated. The analysis showed that the rare earth elements are located in the Ag sites of the crystal lattice. The increase in second harmonic generation intensity was attributed to the decrease in bandgap and increased electron-phonon interaction in rare-earth-doped Ag3AsS3 crystals. The results suggest that rare-earth-doped Ag3AsS3 crystals have potential applications in non-linear optical devices in the infrared frequency range.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
O. Berezniuk, I Petrus, I Olekseyuk, O. Smitiukh, O. Zamuruyeva, V Nakhod
Summary: Phase equilibria in the quasi-ternary system Ag2S-GeS2-P2S5 at 500K were investigated, along with the phase diagram of the quasi-binary system Ag7PS6-Ag8GeS6 and the crystal structure of the two compositions. The optical band gap was determined by measuring the energy position of the optical absorption edge at 293K.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
M. Ya. Rudysh, A. O. Fedorchuk, V. Yo. Stadnyk, P. A. Shchepanskyi, R. S. Brezvin, B. I. Horon, O. Yu. Khyzhun, O. M. Gorina
Summary: The theoretical study of the (NH4)2BeF4 crystal explores its structure and specific properties within the framework of the DFT. The band-energy structure and fundamental absorption edge of the crystal are calculated and discussed. The dielectric function, refractive indices, and elastic properties of the crystal are also calculated and compared with experimental data. The findings highlight the anisotropy of optical and elastic properties, which is important for potential applications of the crystal.
CURRENT APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
M. Piasecki, O. Parasyuk, V Pavlyuk, O. Y. Khyzhun, I. Kityk, G. L. Myronchuk, K. T. Wojciechowski, S. Levkovets, L. Piskach, A. O. Fedorchuk, P. M. Fochuk, V Wood, M. Yarema
Summary: The study presents a method to search for new detector materials by combining binary photodetector compounds. A new solid solution was discovered in the TlPb2Br5-xIx compositions and a high-quality standardized structure file was prepared through thorough crystallographic analysis. In addition, the phase diagram of the TlPb2Br5-'TlPb2I5' section was completed based on 21 alloys.
MATERIALS ADVANCES
(2022)
Article
Materials Science, Multidisciplinary
L. O. Fedyna, A. O. Fedorchuk, V. M. Mykhalichko, M. F. Fedyna
Summary: Phase equilibria in a section of 7.14 at.% La in the La-Cu-Si ternary system at 870 degrees K were studied, leading to the discovery of two new LaCu9.61Si3.39 and LaCu8.37Si4.63 ternary compounds. Both compounds, representing the NaZn13 structural type, were analyzed for their structural transformations and affinity with other lanthanum and copper silicides. Additionally, structural relationships with simple crystal structures were illustrated in the La-Cu-Si system.
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)
