Article
Polymer Science
Keumkyung Kuk, Lukas Gregel, Vahan Abgarjan, Caspar Croonenbrock, Sebastian Haensch, Matthias Karg
Summary: This paper reports on a one-pot synthesis protocol for micron-sized silica-poly(N-isopropylacrylamide) core-shell microgels and demonstrates excellent control over the shell-to-core ratio. The experimental results show that the synthesized microgels are monodisperse and suitable for optical investigations even at high packing fractions.
Article
Chemistry, Applied
Taskeen Niaz, Muhammad Imran, Alan Mackie
Summary: Encapsulating carvacrol in chitosan-albumin based core-shell nano-carriers enhances its stability and bioaccessibility under simulated digestion conditions, particularly showing increased stability in the intestinal phase. These core-shell nano-carriers may be an effective means of encapsulating, protecting and delivering hydrophobic bioactive compounds for functional food applications.
Article
Nanoscience & Nanotechnology
Prajnashree Panda, Ranjit Mishra, Sonali Panigrahy, Sudip Barman
Summary: In this study, a facile two-step process was used to form a 3D assembly of thin Co-Al spinel sheets and carbon composite, which exhibited high specific surface area and enhanced electrochemical activity. This composite showed potential for energy storage applications.
ACS APPLIED NANO MATERIALS
(2022)
Article
Microbiology
Daniel S. S. Trettel, Wade C. C. Winkler
Summary: Microcompartments are large structures in bacteria that help metabolize targeted substances and protect the cytosol. Using high-resolution confocal microscopy, researchers have studied fluorescently tagged microcompartments and their shell protein superstructures in vitro. The imaging technique captured previously observed nanotubes and sheets and showed evidence of intermixing between these structures. The study also suggests that fluorescently modified encapsulation peptides may have preferences in binding with certain shell proteins. These findings demonstrate the power of confocal microscopy for investigating microcompartment-related structures and support the idea of protein intermixing in bacterial microcompartments.
MICROBIOLOGY SPECTRUM
(2023)
Article
Materials Science, Multidisciplinary
Chandan De, Rabindranath Bag, Surjeet Singh, Oscar Fabelo, Maria Teresa Fernandez-Diaz, N. Ter-Oganessian, A. Sundaresan
Summary: In this study, the magnetic easy axis direction of CoAl2O4 was determined to be along [111] by comparing results of magnetoelectric measurements in a high-quality single crystal with phenomenological calculations. The magnetoelectric effect observed in CoAl2O4 is attributed to the single ion contribution of magnetic ions located at the noncentrosymmetric environment, similar to that observed in other A-site magnetic spinel oxides.
Article
Materials Science, Ceramics
Fatma Tugce Senberber Dumanli, Emek Moroydor Derun
Summary: In this study, a spinel form of cobalt aluminate (CoAl2O4) was successfully synthesized using different experimental procedures assisted by ultrasonics. The effects of ultrasonic treatment with co-precipitation and hydrothermal experimental methods were compared with traditional techniques. The results indicated that enhanced chromatic features resulted from the experimental procedures modified by ultrasonic treatment. The synthesized phase was identified as Spinel with the chemical formula of CoAl2O4 according to XRD analyses. The optimum samples were determined to be UC-8 and UH-9 for the modified methods.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Alexander Lebedev, Bedil M. Saidzhonov, Konstantin A. Drozdov, Andrey A. Khomich, Roman B. Vasiliev
Summary: The vibrational spectroscopy of semiconductor nanostructures can provide important information regarding their structure. In this study, experimental and calculated vibrational spectra of CdSe/CdS core/shell nanoplatelets were compared, revealing the phonon behavior and surface atomic vibration relaxation in nanostructures. The results indicate a noticeable surface relaxation of the outer Cd layer in the nanostructure, affecting the thickness dependence of certain modes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Douglas Cameron, Pierre-Marie Coulon, Simon Fairclough, Gunnar Kusch, Paul R. Edwards, Norman Susilo, Tim Wernicke, Michael Kneissl, Rachel A. Oliver, Philip A. Shields, Robert W. Martin
Summary: Existing barriers to efficient deep-UV LEDs can be overcome by utilizing threedimensional nanostructuring instead of planar growth. A hybrid top-down/bottom-up approach was used to create highly uniform AlGaN core-shell nanorods on sapphire, which showed promising features like enhanced doping and improved light extraction efficiency. The nanorods were found to have low turn-on voltages, strongly rectifying behaviors, and short carrier lifetimes, making them suitable for deep-UV-emitting LEDs.
Article
Multidisciplinary Sciences
M. Hbibi, O. Mommadi, S. Chouef, R. Boussetta, L. Belamkadem, A. El Moussaouy, F. Falyouni, C. M. Duque, J. A. Vinasco, C. A. Duque
Summary: This study investigates the effects of confinement potentials, core size, and shell thickness on the confinement of electron, electron-donor atom, and exciton in a cylindrical core/shell/shell quantum dot (CSSQD). The findings suggest that these factors strongly influence the binding energy and energy levels of the particles, which could have implications for modifying electronic and excitonic properties in nanomaterials science.
SCIENTIFIC REPORTS
(2022)
Article
Food Science & Technology
Setareh Shiroodi, Michael H. Schwarz, Nitin Nitin, Reza Ovissipour
Summary: This study evaluated the impact of nanobubbles and neutral electrolyzed water on different microbial biofilms, finding that nanobubbles alone or in combination with neutral electrolyzed water could effectively remove biofilms, reduce bacterial adhesion, and show potential as a new technology to enhance the efficacy of conventional sanitizers.
FOOD AND BIOPROCESS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Sivaraman Kanithan, Natarajan Arun Vignesh, Siva Baskar, Santhosh Nagaraja, Mohamed Abbas, Abdul Aabid, Muneer Baig
Summary: The study synthesized strontium-doped cobalt aluminate nanoparticles using combustion methods and characterized their structural morphology and optical properties. The nanoparticles exhibited a cubic spinel structure with an average crystallite size of 14 to 20 nm. The materials also displayed ferromagnetic behavior.
Article
Materials Science, Multidisciplinary
Gibeom Kim, Il Sohn
Summary: Selective crystallization can achieve high chromium recovery for sustainable recycling of Cr-containing stainless steel slags by controlling thermophysical properties based on crystallization kinetics. In this study, in-situ observation and crystallization kinetics of synthesized Cr-containing slags were investigated using confocal laser scanning microscopy and differential scanning calorimetry. The crystallization characteristics of the CaO-SiO2-Al2O3-MgO-Cr2O3 slag system were analyzed, and the growth mechanism of primary spinel phase and crystallization kinetics of calcium silicate phase were demonstrated. The apparent activation energy during non-isothermal crystallization was determined using the Friedman differential isoconversional method.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Physics, Applied
Brian Douglas Rummel, Leonid Miroshnik, Marios Patriotis, Andrew Li, Talid R. Sinno, Michael David Henry, Ganesh Balakrishnan, Sang M. Han
Summary: Surface acoustic wave devices were fabricated on a GaAs (100) substrate to demonstrate the capability of 2D Raman microscopy as an imaging technique for acoustic waves on the surface of a piezoelectric substrate. An analytical model was derived to relate Raman peak broadening to the near-surface strain field of the GaAs surface produced by the surface acoustic waves, and atomic force microscopy was used to confirm the presence of a standing acoustic wave. Stress calculations for both imaging techniques were in good agreement, demonstrating the potential of this Raman analysis.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Edgars Butanovs, Alexei Kuzmin, Sergei Piskunov, Krisjanis Smits, Aleksandr Kalinko, Boris Polyakov
Summary: The study demonstrates the growth of high-quality few-layer ReS2 using pre-deposited rhenium oxide coating on different semiconductor material nanowires, creating novel core-shell heterostructures for energy applications involving photocatalytic and electrocatalytic hydrogen evolution.
APPLIED SURFACE SCIENCE
(2021)
Review
Polymer Science
Julie L. P. Jessop
Summary: This article discusses the advantages of using Raman spectroscopy in photopolymerization systems, including flexibility and high resolution, and provides examples to illustrate how Raman spectroscopy can be used to monitor photopolymerization reactions and understand the impact of monomer chemistry and processing conditions.
Article
Chemistry, Physical
E. Enriquez, A. Mariscal, R. Serna, J. F. Fernandez
Summary: Sustainable alternatives to indium tin oxide (ITO), such as titanium oxynitrides, are being sought due to the toxicity, brittleness, and high cost of ITO. By tuning the nitrogen/oxygen ratio, titanium oxynitrides show remarkable mechanical, electrical, and optical properties, allowing for a balance between transparency and conductivity. High-quality TiON nanofilms can be prepared using pulsed laser deposition (PLD) in vacuum, achieving up to 50% transparency and conductivity similar to ITO.
APPLIED SURFACE SCIENCE
(2022)
Review
Materials Science, Ceramics
V. Fuertes, J. J. Reinosa, J. F. Fernandez, E. Enriquez
Summary: Feldspars, the most abundant mineral in the earth's crust, have unique compositional and structural features that make them widely used in the ceramic industry. Engineered feldspar-based ceramics show promise in applications like ceramic tiles, dielectrics, and phosphors, with potential for opening new horizons in the ceramic sector.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Rocio Estefania Rojas-Hernandez, Fernando Rubio-Marcos, Aida Serrano, Sara Roman-Sanchez, Jose Francisco Fernandez, Irina Hussainova
Summary: In this study, (hk0)-textured ZnAl2O4: Nd, Ce sub-micron films were synthesized using a screen printing technique assisted by a molten salt flux and deposited over the sapphire substrate. The focus was on controlling the Ce concentration in the emitting layers and determining the key parameters for the development of efficient ZnAl2O4-based films with remarkable optical properties. The degree of crystallinity and precise adjustment of texture were found to be crucial for improving NIR luminescence efficiency. Specifically, (hk0)-textured films developed at a sintering temperature of around 1300 degrees C exhibited higher NIR emission intensity compared to (hkl)-untextured films. This research demonstrates a feasible approach to achieve high NIR emission performance and validates its applicability for a wide range of applications.
CERAMICS INTERNATIONAL
(2023)
Review
Chemistry, Physical
Aida Serrano, Olga Caballero-Calero, Cecilia Granados-Miralles, Giulio Gorni, Cristina Manzano, Marta Rull-Bravo, Alberto Moure, Marisol Martin-Gonzalez, Jose F. Fernandez
Summary: This study demonstrates the use of a cold sintering process (CSP) to sinter CoSb3-based thermoelectric materials for the first time. The CSP yields samples with a relative density of 86% at 150℃ with a uniaxial pressure of 750 MPa, which is increased to around 92% after a post-annealing at temperatures ≥ 500℃ in Ar atmosphere. The CSP produces Te doped-CoSb3 nanocomposites with similar morphological and structural characteristics to the starting nanopowders obtained by ball milling in air atmosphere. The sintered thermoelectric nanocomposites exhibit a maximum figure of merit of 0.12(3) at room temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
C. Granados-Miralles, A. Serrano, P. Prieto, J. Guzman-Minguez, J. E. Prieto, A. M. Friedel, E. Garcia-Martin, J. F. Fernandez, A. Quesada
Summary: Due to their various applications, lithium ferrites are important materials for emerging technologies. The lithium content in lithium ferrites greatly affects their physical properties and the performance of devices based on these materials. In this study, magnetic lithium ferrite powders with different Li:Fe ratios were synthesized and the Li content was accurately determined using two independent methods. The sintering process led to substantial grain growth and the presence of trapped pores, while the magnetic properties and density of the ceramics were measured. The results provide valuable insights into the synthesis and characterization of lithium ferrites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Ali Saffar Shamshirgar, Maria Fernandez Alvarez, Adolfo del Campo, Jose Francisco Fernandez, Rocio E. Rojas Hernandez, Roman Ivanov, Johanna Rosen, Irina Hussainova
Summary: This study incorporates graphene-augmented alumina nanofibers into epoxy resin to fabricate a tunable absorption multilayer structure for electromagnetic interference shielding and RF absorption. Highly aligned graphene augmented alumina nanofibers were produced using a hot wall one-step catalyst-free chemical vapor deposition method. The highest loss tangent of 0.4 was achieved in a composite containing 1 vol% of randomly oriented nanofibers. A superposed three-layer structure was fabricated, offering an absorption of >90% in the entire X-band and an absorption peak of -25 dB at around 11 GHz. The hybrid nanofibers with a dual loss function show potential for versatile design options in RF absorption.
Article
Materials Science, Multidisciplinary
Fernando Rubio-Marcos, Paula Pamies, Adolfo Del Campo, Jordi Tiana, Jonathan Ordonez-Pimentel, Michel Venet, Rocio E. Rojas-Hernandez, Diego A. Ochoa, Jose F. Fernandez, Jose E. Garcia
Summary: A clear correlation between optical absorption and light-induced strain in ferroelectrics is shown. The phenomenon of photoinduced electronic reconstruction at charged domain walls is proposed as the primary physical mechanism. These results provide a new pathway for designing ferroelectric-based devices with new functionalities, such as thickness gradient-based photo-controlled nanoactuators.
APPLIED MATERIALS TODAY
(2023)
Article
Nanoscience & Nanotechnology
Victor Fuertes, Adolfo del Campo, Nicolas Gregoire, Philippe Labranche, Jose Francisco Fernandez, Younes Messaddeq
Summary: An in-depth study of nanoparticle-doped optical fibers using confocal Raman microscopy, Rayleigh light-scattering microscopy, and scanning electron microscopy (SEM) reveals the crystallization structures and size-dependent Raman shifts of YPO4 nanocrystals in the fiber core. The study also evaluates the Raman properties of the nanocrystals at different temperatures, observing linear phonon softening behavior. These findings provide new insights into the characteristics of nanoparticle-doped optical fibers and open up possibilities for further research in this field.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
A. Moure, P. Val-Gomez, A. del Campo, J. F. Fernandez, F. Rubio-Marcos
Summary: In this study, the stress dynamics and its temperature dependence arising from the Orthorhombic-Tetragonal Polymorphic Phase Boundary (PPB) in lead-free potassium sodium niobate (KNN)-based ceramics were investigated. The growth of Orthorhombic phases is limited by the high-temperature tetragonal phase distributions, and two main mechanisms regulate the decrease of stress processes: microstructural effects hinder the formation of non-180° domains, while ferroelectric domain distribution and local structural heterogeneity contribute to the phase transition widening.
MATERIALS & DESIGN
(2023)
Article
Instruments & Instrumentation
Alessio Sacco, Luisa Mandrile, Li-Lin Tay, Nobuyasu Itoh, Ankit Raj, Alberto Moure, Adolfo Del Campo, Jose F. Fernandez, Keith R. Paton, Sebastian Wood, Hyuksang Kwon, Tehseen Adel, Angela R. Hight Walker, Erlon Henrique Martins Ferreira, Ralf Theissmann, Thomas Koch, Andrea Mario Giovannozzi, Chiara Portesi, Andrea Mario Rossi
Summary: This article presents an interlaboratory comparison on Raman spectroscopy as a reliable method for quantification of TiO2 phases. Raman spectroscopy is a fast, non-invasive technique that can differentiate and measure TiO2 without the need for special reagents or sample preparation.
Article
Chemistry, Multidisciplinary
Jesus Carlos Guzman-Minguez, Cecilia Granados-Miralles, Patrick Kuntschke, Cesar de Julian Fernandez, Sergey Erokhin, Dmitry Berkov, Thomas Schliesch, Jose Francisco Fernandez, Adrian Quesada
Summary: This study aims to explore the magnetic properties of hard-soft composite permanent magnets and their correlation with microstructure. The experimental results show that increasing the particle size of the soft phase can enhance the remanence in injection molded magnets. Through experimental analysis and simulations, it is revealed that the interaction between the hard and soft phases is of a dipolar nature.
Article
Chemistry, Physical
Rocio E. Rojas-Hernandez, Fernando Rubio-Marcos, Jallouli Necib, Mati Danilson, Jose F. Fernandez, Irina Hussainova
Summary: Near-infrared (NIR) emitting phosphors are in high demand for their applications in various fields. This study focuses on synthesizing ZnAl2O4:Ce/Nd films of nanometer thickness for NIR emission using a cost-efficient approach. The use of polycrystalline alumina substrates enhances emission intensity. The concentration of Ce4+ influences NIR emission. The findings contribute to understanding film production processes and guide future studies on NIR emitters.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
I. Mena-Prado, J. J. Reinosa, M. Fernandez-Garcia, J. F. Fernandez, A. Munoz-Bonilla, A. del Campo
Summary: In this study, biobased composite materials based on poly(lactic acid) (PLA) and poly(butylene adipate-co-tera-phthalate) (PBAT) were developed for antibacterial and compostable food packaging films. The incorporation of sodium hexametaphosphate microparticles (E452i) as antimicrobial filler and acetyl tributyl citrate (ATBC) as plasticizer improved the thermal stability, crystallinity, and mechanical properties of the films. The E452i particles also provided antimicrobial properties against Listeria innocua and Staphylococcus aureus, with bacterial reduction percentages higher than 50% in films with 5 wt% of particles. The films maintained their disintegradability under industrial composting conditions.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Environmental
S. Marin-Cortes, M. Fernandez-Alvarez, A. Moure, J. F. Fernandez, E. Enriquez
Summary: This study proposes a method for quantifying mixed construction materials through homogenization and chemometric modeling. It successfully applies this method to real CDW samples, enhancing their recycling potential in the ceramic industry and promoting CDW valorization and sustainability.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Materials Science, Multidisciplinary
Jonathan Ordonez-Pimentel, Michel Venet, Diego A. Ochoa, Fernando Rubio-Marcos, Jose F. Fernandez, Jose E. Garcia
Summary: This study develops a phenomenological model predicting the motion of charged domain walls (CDWs) and proposes a photoinduced electronic reconstruction mechanism as the primary absorption mechanism. Domain wall motion is then driven by the energetic difference between domains in a CDW array, allowing for easy tuning of macroscopic polarization.
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)