Article
Materials Science, Multidisciplinary
L. Zauner, R. Hahn, E. Aschauer, T. Wojcik, A. Davydok, O. Hunold, P. Polcik, H. Riedl
Summary: This study investigates the fracture toughness and fatigue properties of thin films under various loading conditions, revealing their characteristics and possible deformation mechanisms. The findings contribute to improving the durability of coated engineering components.
Article
Materials Science, Multidisciplinary
Hannah-Noa Barad, Mariana Alarcon-Correa, Gerardo Salinas, Eran Oren, Florian Peter, Alexander Kuhn, Peer Fischer
Summary: This study presents an integrated fabrication scheme based on glancing angle physical vapor deposition to form a thin-film materials library with controlled variations in nanoshape, multinary composition, and oxidation state on a single large area substrate. The versatility of the method was demonstrated by growing an octonary materials system and revealing variations in several physico-chemical properties. The scheme can be extended to include more starting elements and transferred to other deposition methods, making it an adaptable and versatile platform for combinatorial materials science.
Article
Materials Science, Multidisciplinary
T. M. Aper, F. K. Yam, K. G. Saw, Khi Poay Beh, Khaled M. Chahrour
Summary: In this study, indium oxide nanostructured films were synthesized using hydrogen assisted atmospheric pressure chemical vapor deposition technique at different deposition temperatures. The films' surface morphology, crystallinity, and optical properties were characterized, and their photoelectrochemical (PEC) activity was investigated. The sample grown at 950 degrees C exhibited optimal PEC performance, with high photocurrent density, incident photon to current conversion efficiency, and applied bias to photon conversion efficiency. The superior PEC performance of the sample was attributed to the film composition, crystallinity, bandgap reduction, flat band potential, and charge carrier density.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Shahnwaz Hussain, Mazhar Iqbal, Ayaz Arif Khan, Muhammad Nasir Khan, Ghazanfar Mehboob, Sohaib Ajmal, J. M. Ashfaq, Gohar Mehboob, M. Shafiq Ahmed, Said Nasir Khisro, Chang-Jiu Li, Raphael Chikwenze, Sabastine Ezugwu
Summary: The study presents the properties of CdSe thin films synthesized at low temperatures for potential use in photovoltaic and electrochemical energy storage devices, exhibiting reproducibility, efficiency, and cost-effectiveness. The samples showed crystalline cubic structure with increasing grain size at higher annealing temperatures, and a small shift in bandgap energy towards visible solar energy region, making these thin films ideal for solar energy harvesting and electrochemical energy storage applications.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Vanessa Proust, Quentin Kirscher, Thi Kim Ngan Nguyen, Lisa Obringer, Kento Ishii, Ludivine Rault, Valerie Demange, David Berthebaud, Naoki Ohashi, Tetsuo Uchikoshi, Dominique Berling, Olivier Soppera, Fabien Grasset
Summary: The objective of this study was to develop simple and easy methods to prepare polymorphic HfO2 thin film materials with the best balance of patterning potential, reproducibility and stability. Nanostructured HfO2 thin films were synthesized by two different methods: deep ultraviolet (DUV) photolithography and electrophoretic deposition (EPD) of HfO2 nanoparticles. The morphology, composition and crystallinity of the HfO2 nanoparticles and thin films were investigated, and the results showed that both DUV photolithography and EPD are suitable methods to prepare controllable and tunable HfO2 nanostructures.
Article
Materials Science, Multidisciplinary
Antoine Raison, Nathalie Prud'homme, Wu Wang, Diana Dragoe, Nita Dragoe
Summary: We have successfully synthesized a multi-cationic oxide (MgCoNiCuZn)O through pulsed liquid injection chemical vapor deposition. The synthesis was carried out at temperatures ranging from 400 degrees C to 550 degrees C, using five metal-organic precursors solubilized in dimethoxyethane (DME). The microstructure of the material was analyzed using HRTEM with HAADF, SEM, EDS, XPS, and XRD techniques before and after annealing.
Article
Chemistry, Multidisciplinary
Uzma Bilal, Muhammad Ramzan, Muhammad Imran, Gul Naz, M. Waqas Mukhtar, Farah Fahim, Hafiz M. N. Iqbal
Summary: This study investigated the electronic, optical, and thermo electronic properties of undoped HfO2 and copper-based transition metal oxides nanostructured thin films through First Principles and experimental examination. The results showed that increasing substrate temperature improved the surface density and crystallinity of the films, leading to enhanced optical activity.
JOURNAL OF NANOSTRUCTURE IN CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Md Abdul Majed Patwary, Md Alauddin Hossain, Bijoy Chandra Ghos, Joy Chakrabarty, Syed Ragibul Haque, Sharmin Akther Rupa, Jamal Uddin, Tooru Tanaka
Summary: This review discusses the potential of CuxO nanostructured thin films in transparent and flexible electronics, introduces the advantages of the SILAR technique, and analyzes various factors affecting the fabrication performance of CuxO films.
Review
Materials Science, Multidisciplinary
Mari Napari, Tahmida N. Huq, Robert L. Z. Hoye, Judith L. MacManus-Driscoll
Summary: Nickel oxide (NiOx) is a key p-type oxide semiconductor with versatile and tunable properties, widely used in electronic devices. The properties of NiO(x) thin films strongly depend on the deposition method and conditions. Efficient implementation of NiO(x) in next-generation devices will require controllable growth and processing methods.
Article
Chemistry, Physical
Ryuto Horie, Hiroyuki Nishinaka, Daisuke Tahara, Masahiro Yoshimoto
Summary: Alloying γ-Ga2O3 with γ-aluminum oxide effectively achieves lattice-matched growth and band gap engineering, leading to a band gap energy of 5.88 eV. The epitaxial growth of γ-(AlxGa1-x)2O3 on spinel substrates demonstrated limited dislocations and band gap engineering capabilities in the range of 5.0-6.0 eV, showing promise for wide band gap semiconductor applications in power switching devices and deep-ultraviolet optoelectronics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
J. Potocnik, M. Popovic, M. Mitric, Z. Rakocevic
Summary: The deposition angle has a significant influence on the porosity, crystallinity, surface roughness, as well as the optical and electrical properties of nickel thin films. Variations in refractive index, extinction coefficient, and resistivity were observed with different deposition angles, which can be correlated with changes in microstructure and porosity of the films.
Article
Materials Science, Multidisciplinary
Marzieh Kajbafvala, Omran Moradlou, Alireza Z. Moshfegh
Summary: The development of low-cost and earth-abundant electrocatalysts for the hydrogen evolution reaction (HER) is crucial for energy applications. Nickel sulfide thin films (NiSx) were successfully synthesized on conductive nickel foam substrates via chemical vapor deposition (CVD) at 300°C. By controlling the precursor ratio, a single phase of Ni3S2 was obtained, showing superior HER activity with the lowest overpotential and high accessibility to active sites on the electrochemical surface area. The study demonstrates the importance of precursor ratio in crystalizing different phases of nickel sulfides and the superior performance of Ni3S2 for HER.
Article
Materials Science, Coatings & Films
Florian Lourens, Alfred Ludwig
Summary: This method presents a way to uniformly deposit thin films on microparticles by oscillating them, allowing for the coating of different types of particles and the deposition of films with composition gradients on uniform particles.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
David J. Hynek, Raivat M. Singhania, Shiyu Xu, Benjamin Davis, Leizhi Wang, Milad Yarali, Joshua Pondick, John M. Woods, Nicholas C. Strandwitz, Judy J. Cha
Summary: MoTe2 can access various electronic states due to small energy differences between its polymorphs, making it suitable for phase transformation studies and quantum phenomena. Large-area thin films with high crystallinity are crucial for careful applications of MoTe2.
Article
Engineering, Electrical & Electronic
S. Sugumaran, T. A. Divya, R. K. Sivaraman, C. S. Bellan, K. C. Sekhar, M. F. Jamlos
Summary: Nanostructured LaAlO3 thin films with thicknesses of 50 nm, 100 nm, and 150 nm were successfully prepared using thermal evaporation technique. The films exhibited a La-Al-O bond, perovskite LaAlO3 structure, and promising electrical properties for potential applications in electronic devices in the future.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Analytical
Alice Massimiani, Filippo Panini, Simone Luigi Marasso, Nicolo Vasile, Marzia Quaglio, Christian Coti, Donatella Barbieri, Francesca Verga, Candido Fabrizio Pirri, Dario Viberti
Summary: Understanding multiphase flow in porous media is important in various fields, but detailed visualization is challenging due to opacity and complexity. Microfluidic devices provide a solution by enabling direct visualization and control of fluid dynamics. In this study, two different micromodels were designed, fabricated, and tested for visualizing gas-brine flow in underground storage systems. Preliminary experiments were conducted to validate the design and fabrication procedures and to explore the impact of design on fluid dynamics.
Article
Chemistry, Multidisciplinary
Mauro Petretta, Simona Villata, Marika Pia Scozzaro, Livia Roseti, Marta Favero, Lucia Napione, Francesca Frascella, Candido Fabrizio Pirri, Brunella Grigolo, Eleonora Olivotto
Summary: This study aimed to develop a bioartificial synovial tissue using 3D bioprinting technology for drug screening or personalized medicine applications. Gelatin Methacryloyl (GelMA) and K4IM cells were used to fabricate cell-laden scaffolds with desired morphology and internal architecture. The scaffolds showed high cell viability and negligible cytotoxicity.
APPLIED SCIENCES-BASEL
(2023)
Article
Computer Science, Information Systems
Nicolo Cacocciola, Simone Luigi Marasso, Giancarlo Canavese, Matteo Cocuzza, Candido Fabrizio Pirri, Francesca Frascella
Summary: Mechanical forces play a role in shaping and altering cells and tissue microenvironments. In this study, a versatile pneumatic system based on Arduino was developed to provide mechanical hydrostatic stimulation to a cell culture. The system is capable of modifying the hydrostatic pressure inside a culture chamber, allowing researchers to investigate the effects of dynamic compression on cell differentiation, stiffness, and cytoskeleton rearrangements. A human respiration-like compression pattern was used to mimic the mechanical stress conditions in the human lung alveoli.
Article
Nanoscience & Nanotechnology
Francesca Legittimo, Monica Marini, Stefano Stassi, Enzo Di Fabrizio, Carlo Ricciardi
Summary: Real-time monitoring of structural transitions in DNA complexes is currently limited to complex techniques and chemically modified oligonucleotides. Here, we show that nanomechanical resonators made of different DNA complexes can be used to monitor structural variations by tracking the flexural resonance frequency as a function of temperature. This has implications in environmental studies and in vitro experiments for evaluating the effects of drugs on DNA.
ACS APPLIED NANO MATERIALS
(2023)
Review
Environmental Sciences
Alice Massimiani, Filippo Panini, Simone Luigi Marasso, Matteo Cocuzza, Marzia Quaglio, Candido Fabrizio Pirri, Francesca Verga, Dario Viberti
Summary: Underground porous media are complex multiphase systems influenced by physical phenomena occurring at the pore(micro)-scale, and understanding pore-scale fluid flow, transport properties, and chemical reactions is crucial. Microfluidics, with its synthetic tools known as micromodels or microfluidic devices, offers direct visualization of fluid dynamics and has become a valuable tool for investigating multiphase flow in underground porous media. This article provides a review of the design, materials, and fabrication techniques of 2D micromodels, as well as their applications and limitations.
Article
Chemistry, Multidisciplinary
Pietro Zaccagnini, Lars Henning Hess, Luisa Baudino, Marco Laurenti, Mara Serrapede, Andrea Lamberti, Andrea Balducci
Summary: The present work investigates a new phenomenon observed during aluminum dissolution experiments for supercapacitors (SCs) stability investigation. Supercapacitor (SC) electrodes based on carbon-coated aluminum foils were cyclically electrochemically treated in harsh conditions using bis-trifluoromethylsulfonyl imide (TFSI)-based electrolyte and Acetonitrile (ACN) as solvent. Dissolution of aluminum and subsequent plating on the carbonaceous surface were observed. The same process could also be reproduced on standard SC activated carbon electrodes. This mechanism suggests a potential strategy for achieving competitive Al film deposition by electroplating instead of the common copper counterpart.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Giorgio Mogli, Marco Reina, Annalisa Chiappone, Andrea Lamberti, Candido Fabrizio Pirri, Ignazio Roppolo, Stefano Stassi
Summary: This study presents a photocurable hydrogel with excellent sensitivity to mechanical deformation and spontaneous self-healing capabilities. Complex-shaped wearable sensors are fabricated using 3D printing technology, increasing sensitivity compared to simple sensor geometries. The hydrogel is also used as an electrolyte in a laser-induced graphene-based supercapacitor and integrated into a 3D printed sensor, creating a self-powered, fully integrated strain sensor system.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Giulia Gianola, Nadia Garino, Mattia Bartoli, Adriano Sacco, Candido F. Pirri, Juqin Zeng
Summary: In this study, a green approach for synthesizing catalysts for oxygen reduction reaction (ORR) was reported. Conductive cellulose nanocrystals (CNCs) were obtained through pyrolysis and subsequently activated with sulfur (S) and nitrogen (N) dopants and decorated with tin oxide (SnO2) nanocrystals using a microwave-assisted hydrothermal process. The resulting N/S-doped CNC/SnO2 nanocomposite showed excellent catalytic performance towards the ORR in alkaline environment, which demonstrates its potential in alkaline fuel cell and metal-air battery applications.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Polymer Science
Valentina Bertana, Giorgio Scordo, Elena Camilli, Limeng Ge, Pietro Zaccagnini, Andrea Lamberti, Simone Luigi Marasso, Luciano Scaltrito
Summary: Renewable energy technologies and IoT devices require proper energy storage devices, and additive manufacturing techniques offer the possibility to fabricate functional features. Among these techniques, direct ink writing is widely investigated for producing energy storage devices. This study presents the development and characterization of a resin for micro precision stereolithography 3D printing of a supercapacitor. The printed electrodes were electrically and electrochemically investigated in an interdigitated device architecture, showing good electrical conductivity and energy density within the literature range.
Article
Chemistry, Multidisciplinary
Ivan De Carlo, Luisa Baudino, Petr Klapetek, Mara Serrapede, Fabio Michieletti, Natascia De Leo, Fabrizio Pirri, Luca Boarino, Andrea Lamberti, Gianluca Milano
Summary: This study reports on the electrical and thermal properties of copper oxide nanowires synthesized through thermal growth on copper foil. The nanowires exhibited high conductivity and thermal conductivity, making them suitable for the rational design of optoelectronic devices.
Article
Materials Science, Multidisciplinary
Pietro Zaccagnini, Ye Tien, Luisa Baudino, Alessandro Pedico, Stefano Bianco, Andrea Lamberti
Summary: This article presents the first charge-balanced double-layer microsupercapacitor based on laser-induced graphene, with improved lifetime and energy efficiency through electrode optimization and the use of an ionic liquid electrolyte.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Marine
Andrea Carpignano, Raffaella Gerboni, Alessio Mezza, Candido Fabrizio Pirri, Adriano Sacco, Daniele Sassone, Alessandro Suriano, Anna Chiara Uggenti, Francesca Verga, Dario Viberti
Summary: New possibilities for repurposing old platforms have been explored, particularly for transitioning them from recreational tourism to fish farming. This study examines the potential conversion options in the context of the current energy transition and the offshore Italian scenario. The findings show that offshore platforms can be converted into valuable infrastructure, contributing to the energy transition targets, as long as system specificity is considered, including the relevant depleted reservoirs.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Marine
Christoforos Benetatos, Felice Catania, Giorgio Giglio, Candido Fabrizio Pirri, Alice Raeli, Luciano Scaltrito, Cristina Serazio, Francesca Verga
Summary: This paper discusses the importance of underground fluid storage for balancing energy production and consumption, ensuring energy supply security, and reducing greenhouse gas emissions through CO2 geological sequestration. The authors developed a technology and methodology to monitor seabed movements and validate predictions of offshore underground fluid storage impacts. They integrated a measurement system into an Autonomous Underwater Vehicle to periodically monitor seabed bathymetry and compared these measurements with numerical simulations to confirm safety conditions. The Virtual Element Method was applied to simulate the response of the storage system to fluid storage.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Giacomo Spisni, Giulia Massaglia, Valentina Bertana, Nicolo Vasile, Fabrizio C. Pirri, Stefano Bianco, Marzia Quaglio
Summary: This study proposes a redesign of asymmetric single-chamber microbial fuel cells (a-SCMFCs) with the goal of optimizing energy production. The introduction of a novel intermediate microfluidic septum (IMS) inside the electrolyte chamber is shown to enhance energy recovery and maximum output potential. The presence of IMS also improves the long-term stability and initial inoculation phase of electrical performance.
APPLIED SCIENCES-BASEL
(2023)
Article
Nanoscience & Nanotechnology
Annalisa Chiappone, Ignazio Roppolo, Edoardo Scavino, Giorgio Mogli, Candido Fabrizio Pirri, Stefano Stassi
Summary: This study investigates the application of digital light processing (DLP) technique to the 3D printing of triboelectric nanogenerators (TENGs). Printable materials were tested as triboelectric layers, and the results showed that DLP technology can be used to manufacture complex TENG devices and efficiently harvest energy from human movement.
ACS APPLIED MATERIALS & INTERFACES
(2023)
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)
