Article
Chemistry, Multidisciplinary
Jianzong Wang, Luhong Wang, Fuyang Liu, Shuhua Yuan, Dongzhou Zhang, Vitali B. Prakapenka, Wilhelm Klein, Haozhe Liu
Summary: X-ray diffraction and Raman spectroscopy were used to study the structure evolution of Bi4O7 during compression. Two isostructural phase transitions were observed at approximately 3.0 GPa (transition to phase II) and 13.0 GPa (transition to phase III). The pressure-volume curve was discontinuous at these two pressure transition boundaries. The bulk moduli were estimated to be approximately 101 GPa, 68 GPa, and 172 GPa, indicating significant differences and confirming the two isostructural phase changes. An irreversible amorphization process started at approximately 20 GPa, resulting in complete amorphization at 30 GPa.
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2023)
Article
Chemistry, Inorganic & Nuclear
Zhuanling Bai, Jacob Brannon, Cristian Celis-Barros, Nicholas Beck, Joseph M. Sperling, Brian M. Rotermund, Daniela Gomez Martinez, Hannah B. Wineinger, Thomas E. Albrecht-Schonzart
Summary: The synthesis, structure, and Raman spectrum of Ra-(NO3)(2) were investigated by experimentation and theory. Single crystal X-ray diffraction analysis showed that radium nitrate is isomorphous with Ba-(NO3)(2) and crystallizes in the cubic space group Pa 3 with a = 8.2268(1) angstrom at 100K. Ra-(NO3)(2) represents the first pure radium compound characterized by single crystal X-ray diffraction. The Raman spectrum of Ra-(NO3)(2) generally occurs at a lower frequency compared to Ba-(NO3)(2), as expected. Computational studies provided an estimation of bond orders and indicated weak Ra-O interactions.
INORGANIC CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Connor Terry K. Weatherly, Justin Provazza, Emily A. Weiss, Roel Tempelaar
Summary: This study introduces a photophysical phenomenon where UV/vis excitation and a Franck-Condon active vibration of a molecule can lead to IR emission through strong coupling to an optical cavity. The process involves the formation of excited state vibrational polaritons (ESVP) mediated by vibrational modes with both non-zero Franck-Condon activity and IR activity in the excited state. The authors identify 1-pyreneacetic acid as a molecule that exhibits this property and model the dynamics of ESVP. The UV/vis-to-IR photonic down conversion process has applications in sensing excited state vibrations and quantum transduction schemes.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Xinliang Li, Mian Li, Zhaodong Huang, Guojin Liang, Ze Chen, Qi Yang, Qing Huang, Chunyi Zhi
Summary: This study demonstrates the activation of reversible redox behavior in iodine conversion batteries through electrolyte adjustment, achieving significant performance enhancements.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
M. Camacho-Lopez, M. Ballesteros-Balbuena, A. Esparza-Garcia, M. Flores-Castaneda, S. Camacho-Lopez, M. A. Camacho-Lopez
Summary: This study focuses on the phase transition from bismuth to β-Bi2O3 by gradually heating the bismuth film. The results show that by carrying out the oxidation process at a low temperature, pristine bismuth can be transformed into β-Bi2O3. The transformation was characterized using various techniques, and the method shows feasibility and simplicity for the synthesis of β-Bi2O3.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Mihai Mesko, Li Xiang, Scott Bohle, Dong Soo Hwang, Hongbo Zeng, Matthew J. Harrington
Summary: Recent research has found that mussels use vanadium to enhance cohesion in their byssus fibers, rather than solely relying on iron as previously thought. Vanadium is more effective at forming tris-DOPA-metal complexes within the relevant pH ranges for byssus formation and function, especially when starting from the V-III form. Additionally, DOPA-V complexes can form at very low pH values, indicating potential adaptation of the protein sequence for vanadium binding.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Dardan Ukaj, Hana Bunzen, Jan Berger, Gregor Kieslich, Roland A. Fischer
Summary: Electrically conductive metal-organic frameworks show potential for next-generation electronic devices. The incorporation of guest molecules in porous structures creates charge transport pathways. Vibrational spectroscopy is a powerful tool for understanding host-guest interactions and enhancing electrical conductivity in MOFs.
CHEMISTRY OF MATERIALS
(2021)
Article
Materials Science, Ceramics
Santosh Behara, Kazutaka Ikeda, Tiju Thomas
Summary: The study reports the structural and optical properties of Dy3+ doped NBT, showing the amphoteric behavior of Dy3+ occupying both Bi and Ti-sites. Raman spectra demonstrate the asymmetry in TiO6 polyhedra, while PL spectra reveal blue and yellow emissions with an asymmetric ratio confirming the amphoteric distribution of Dy3+ ions. The correlation between amphoteric behavior and site-dependent luminescence variation is highlighted in the structure-property relationships.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Stepan Stehlik, Michel Mermoux, Bernhard Schummer, Ondrej Vanek, Katerina Kolarova, Pavla Stenclova, Ales Vlk, Martin Ledinsky, Rene Pfeifer, Oleksandr Romanyuk, Ivan Gordeev, Francine Roussel-Dherbey, Zuzana Nemeckova, Jiri Henych, Petr Bezdicka, Alexander Kromka, Bohuslav Rezek
Summary: The study investigated the effects of size on the surface chemistry, microscopic structure, and Raman scattering of nanodiamonds, revealing size-dependent and synthesis-dependent differences in their properties. By analyzing particle size distribution and comparing detonation and high-pressure high-temperature nanodiamonds, the study identified effects of diamond core size, defects, chemical stability, and phonon confinement models. Additionally, low-frequency Raman scattering was observed, suggesting confined acoustic vibrational modes in the nanodiamonds.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Sergey A. Baskakov, Yulia V. Baskakova, Eugene N. Kabachkov, Elizaveta V. Dvoretskaya, Svetlana S. Krasnikova, Vitaly I. Korepanov, Alexandre Michtchenko, Yury M. Shulga
Summary: Thermally stable films were successfully obtained by adding small amounts of graphene oxide (GO) to a water-based polyurethane (PU) dispersion. The films were characterized using elemental analysis, X-ray photoelectron spectroscopy, differential thermogravimetry, and Raman spectroscopy. It was observed that the introduction of GO into a PU matrix led to partial reduction in graphene oxide nanosheet and an increase in defects concentration in the GO structure. The [C/N] ratio in the near-surface layer of PU/GO composite films was found to increase with the increase in graphene oxide content.
Article
Multidisciplinary Sciences
Andre Al-Haddad, Solene Oberli, Jesus Gonzalez-Vazquez, Maximilian Bucher, Gilles Doumy, Phay Ho, Jacek Krzywinski, Thomas J. Lane, Alberto Lutman, Agostino Marinelli, Timothy J. Maxwell, Stefan Moeller, Stephen T. Pratt, Dipanwita Ray, Ron Shepard, Stephen H. Southworth, Alvaro Vazquez-Mayagoitia, Peter Walter, Linda Young, Antonio Picon, Christoph Bostedt
Summary: This study demonstrates the ability to track ultrafast electron rearrangement and chemical bond breaking in real time at specific sites using X-ray photoelectron spectroscopy. By observing the chemical shifts of the carbon core-electron binding energy, the authors can investigate charge redistribution and dissociation processes.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Rhys P. King, Madeleine S. Woodward, Julian Grigg, Graeme McRobbie, William Levason, Gillian Reid
Summary: The study characterized various Sn-F organometallic complexes through multiple analytical techniques, showing specific structural features in both solution and solid state, including unstable compounds and the presence of coordinated impurities.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Parmish Kaur, Arbresha Muriqi, Jan-Lucas Wree, Ramin Ghiyasi, Muhammad Safdar, Michael Nolan, Maarit Karppinen, Anjana Devi
Summary: A novel atomic/molecular layer deposition process for cerium-based metal-organic hybrid films is presented in this study. Using a highly reactive cerium(iii) guanidinate precursor in combination with specific organic precursors, the hybrid films were grown at high growth rates. The films showed favorable UV absorption properties and potential applications as redox active materials and UV-absorbing materials.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Kelsey Haddad, Ahmed Abokifa, Siyuan An, Junseok Lee, Baranidharan Raman, Pratim Biswas, John D. Fortner
Summary: This work explores the morphology and functionality of graphene oxide in relation to room temperature gas sensing performance. It synthesizes highly-oxidized, crumpled graphene oxide (HO-CGO) and compares it to thermally reduced flat graphene oxide. The results show that HO-CGO exhibits the strongest response to ethanol after one hour of reduction at a mild temperature, while flat graphene oxide shows no response. Density functional theory and molecular dynamics simulations reveal that structural valleys in CGO act as stable sites for oxygen defects and preferential binding sites for ethanol molecules, which results in enhanced sensing response.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Materials Science, Ceramics
R. Nagaraju, B. Devaiah, L. Haritha, K. Chandra Sekhar, Md. Shareefuddin, M. A. Sayed, G. Lalitha, K. Vijaya Kumar
Summary: An extensive study was conducted on the physical and structural properties of CPBBCR: CaF2-PbF2-Bi2O3-B2O3-Cr2O3 glasses, including density, molar volume, and optical properties. Various analysis methods were used to determine the properties and composition of the glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Applied
Valencia G. Karen, Agileo Hernandez-Gordillo, Socorro Oros-Ruiz, Sandra E. Rodil
Summary: The study prepared alpha phase bismuth oxide microparticles through a chemical precipitation method, analyzing the effects of different synthesis conditions on their physicochemical properties and photocatalytic activity.
TOPICS IN CATALYSIS
(2021)
Article
Engineering, Biomedical
J. M. Bello-Lopez, P. Silva-Bermudez, G. Prado, A. Martinez, Gabriela Ibanez-Cervantes, Monica Alethia Cureno-Diaz, L. Rocha-Zavaleta, J. Manzo-Merino, A. Almaguer-Flores, C. Ramos-Vilchis, S. E. Rodil
Summary: This study demonstrates that a nanometric layer of biometallic AgCu can effectively be deposited on polypropylene (PP) fibers, showing virucidal and bactericidal properties against SARS-CoV-2 and pathogenic bacteria. The results indicate a reduction of more than 95% in viral loads after 2 hours of contact, with no cytotoxicity observed for human cells. The application of AgCu nanofilm on reusable cloth masks could help prevent virus and bacterial infection while reducing pollution.
BIOMEDICAL MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
J. Alejandro Arana-Trenado, David Ramirez-Ortega, Amauri Serrano-Lazaro, Agileo Hernandez-Gordillo, Sandra E. Rodil, Monserrat Bizarro
Summary: The study deposited BiOBr and BiOI films using spray pyrolysis technique and formed heterojunctions with different stacking orders. Results showed that the BiOI-BiOBr structure boosted the photocatalytic efficiency, while the BiOBr-BiOI structure had opposite effects.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Multidisciplinary
J. Restrepo, G. Mondragon-Rodriguez, J. M. Gonzalez-Carmona, J. M. Alvarado-Orozco, O. Garcia-Zarco, S. E. Rodil
Summary: The addition of V does not affect the hardness of TiSiN coatings but can reduce the coefficient of friction in dry sliding tests and change the wear mechanism, potentially leading to a lower wear rate.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Coatings & Films
A. Delgado, O. Garcia-Zarco, J. Restrepo, S. E. Rodil
Summary: This study investigated the effect of adding vanadium to AlCrN coatings. The results showed that vanadium addition significantly improved the hardness and wear resistance of AlCrN coatings, without compromising the oxidation resistance.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Lorena Cerezo, Karen G. Valencia, Agileo Hernandez-Gordillo, Monserrat Bizarro, Prospero Acevedo-Pena, Sandra E. Rodil
Summary: In this study, zinc sulfide nanosheets with different ethylenediamine contents were prepared and treated with a photoexfoliation process. The photoexfoliation significantly affected the physicochemical properties and stability of the nanosheets, leading to an increase in photocatalytic H-2 production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
G. Ibanez-Cervantes, G. E. Lugo-Zamudio, C. Cruz-Cruz, E. M. Duran-Manuel, J. C. Bravata-Alcantara, E. Garcia-Moncada, M. Mata-Rocha, L. Delgado-Balbuena, M. A. Cureno-Diaz, C. R. Ramirez-Cortina, G. Leon-Avila, B. Nogueda-Torres, J. M. Hernandez-Hernandez, S. E. Rodil, J. M. Bello-Lopez
Summary: Ozone (O3) was considered as an effective disinfectant alternative for N95 masks and biosecurity gowns due to its potent oxidative activity against biological macromolecules. SARS-CoV-2 was successfully eliminated after 15 minutes of O3 exposure, indicating that the N95 masks could be safely reused for up to 6 cycles.
Article
Chemistry, Applied
Juan C. Medina, Omar Miguel-Lopez, Sandra E. Rodil, Rodolfo Zanella
Summary: This study reports the synthesis, characterization, and catalytic evaluation of two different mesoporous transition metal oxides for the soot oxidation reaction, and investigates the effect of sodium addition. The results show that the optimal sodium load can significantly enhance the catalytic performance, and the 7Na/m-Co3O4 catalyst exhibits good stability.
TOPICS IN CATALYSIS
(2022)
Article
Chemistry, Physical
Benjamin Millan-Ramos, Daniela Morquecho-Marin, Phaedra Silva-Bermudez, David Ramirez-Ortega, Osmary Depablos-Rivera, Julieta Garcia-Lopez, Mariana Fernandez-Lizarraga, Argelia Almaguer-Flores, Jose Victoria-Hernandez, Dietmar Letzig, Sandra E. Rodil
Summary: This study investigated the effect of annealing treatment on the performance of the ZX11 alloy and found that a higher annealing temperature resulted in an increased long-term degradation rate. This increased degradation rate affected the mechanical integrity of the alloy, but had minimal cytotoxic effects.
Article
Materials Science, Multidisciplinary
A. Covelo, S. Rodil, X. R. Novoa, M. Hernandez
Summary: In this study, a new processing route of anodized aluminum AA2024 was developed by incorporating a hydrophobic top sealant, which improved both the electrochemical and mechanical properties of the alloy and enhanced its corrosion resistance in saline media. The cerium nitrate system obtained the best results among the different sealant solutions used.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Mariana Fernandez-Lizarraga, Julieta Garcia-Lopez, Sandra E. Rodil, Rosa Maria Ribas-Aparicio, Phaedra Silva-Bermudez
Summary: Biomaterials with adequate properties are crucial for orthopedic and dental implants. Metal oxide coatings, such as TiO2, ZrO2, Nb2O5, and Ta2O5, have shown promise but lack comparative studies. In this study, thin films of these coatings were deposited and characterized. Cell adhesion, viability, proliferation, and differentiation experiments revealed that all coatings were biocompatible, with Nb2O5 and Ta2O5 showing better cell proliferation and longer differentiation time.
Article
Engineering, Electrical & Electronic
G. Karen Valencia, Agileo Hernandez-Gordillo, Melissa Mendez-Galvan, Diego Morett, Sandra E. Rodil
Summary: Polymeric graphitic carbon nitride (g-C3N4) was modified by in-situ generated NH3 from hydrazine decomposition, which affected the physicochemical properties, surface properties, photocatalytic response, and photostability of g-C3N4.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Optics
Lorena Reyes-Carmona, Enrique Camps, Enrique Campos-Gonzalez, Gabriela Mercado-Celis, Alejandra Cervantes-Garduno, Ezequiel A. Perez-Ibarra, Rafael Alvarez-Chimal, Sandra E. Rodil, Argelia Almaguer-Flores
Summary: Nowadays, nanotechnology is being used to develop novel therapeutic compounds for the treatment of oral infections. In this study, bismuth subsalicylate nanoparticles (BSS-NPs) synthesized through laser ablation of solids in liquids (LASL) showed antibacterial activity against microorganisms from periodontal disease patients. The physicochemical characterization of the BSS-NPs revealed their triclinic crystallographic structure, functional group vibrational modes, quasi-spherical shape, and size. The BSS-NPs exhibited water-suspended stability and inhibited over 30% of cultivable bacteria from oral biofilm samples, including Aggregatibacter, Streptococcus, Veillonella, Eikenella, Peptostreptococcus, Eubacterium, Prevotella, Selenomonas, Haemophilus, and Filifactor, as determined by 16S rRNA sequencing.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Gina Prado-Prone, Phaedra Silva-Bermudez, Sandra E. Rodil, Yasaman Ganjkhani, Ali-Reza Moradi, Franklin J. Mendez, Jorge A. Garcia-Macedo, Masoomeh Bazzar, Argelia Almaguer-Flores
Summary: Periodontitis is a common infectious disease that causes progressive destruction of the periodontal tissues. This study presents modified membranes with zinc oxide nanoparticles for potential use in guided and bone tissue regeneration therapies. The membranes showed effective antibacterial properties and promoted osteogenic differentiation, making them promising candidates for clinical treatments.
BIOMEDICAL PHYSICS & ENGINEERING EXPRESS
(2023)
Article
Engineering, Mechanical
Sandra E. Rodil, Osmary Depablos-Rivera, Juan Carlos Sanchez-Lopez
Summary: Bismuth oxide (Bi2O3) coatings and composite coatings containing this oxide have been investigated for their potential applications in various fields. Two parametric models based on chemical features have been proposed to predict the lubricity response of oxides, but they provide contradictory values for the coefficient of friction (COF) of Bi2O3. In this study, magnetron sputtering was used to deposit Bi2O3 coatings on steel substrates, and tribological responses were evaluated. The delta-Bi2O3 phase showed low wear and COFs, indicating lubricious behavior and supporting the validity of one of the models. Challenges regarding adhesion strength and thermal stability were observed for future applications.
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)