Article
Chemistry, Physical
Anima Mahajan, Nausad Khan, Krishna K. Yadav, Menaka Jha, Santanu Ghosh
Summary: In this study, LaS2 ultrafine nanostructures were successfully synthesized using anisotropic nanostructures of La(OH)(3), which have applications in display devices, optoelectronics, field emission, and thermoelectric devices due to their low work function and excellent chemical and physical properties. Anisotropic La(OH)(3) was synthesized by the micellar-assisted hydrothermal route and then reacted with elemental sulfur at ambient pressure to obtain stable LaS2 nanoparticles with a size of about 25 nm. The obtained lanthanum disulfide was used to make LaS2 ink and spin-coated onto a silicon substrate to fabricate a LaS2 film. The field emission study of the LaS2 film showed the lowest turn-on field (<3.9 V/mu m), a high field enhancement factor (beta = 14,594), and a high current density of 7.15 mu A/cm(2), which is about 10 times higher than previous reports.
APPLIED SURFACE SCIENCE
(2023)
Article
Plant Sciences
Hanna B. Margonska, Malgorzata Kozieradzka-Kiszkurno, Emilia Brzezicka, Lukasz P. Halinski, Kevin L. Davies, Monika M. Lipinska
Summary: Crepidium is a large genus of mainly pantropical orchids with limited information on pollination and floral morphology. Field observations show that the flowers are visited by various insects and have two forms of small liquid droplets on the lip surface. Through GC-MS analysis and microscopy examination, it was found for the first time that these species exhibit liquid secretion.
Article
Chemistry, Physical
Subodh Shrivastava, Shubhra Mathur, Nutan Sharma, Ankit Kumar Vishwakarma, Chagan Lal Saini, S. P. Nehra
Summary: In this study, conducting MWNT/PANI nanocomposite was successfully synthesized using in-situ oxidative polymerization at low temperatures. The physicochemical properties of the nanocomposite were characterized, and the effect of MWNT loading on the gas sensing properties for hydrogen gas was analyzed. The results showed that the addition of MWNT improved the crystallite, conductivity, stability, and morphology of the composite material. The MWNT/PANI thin film sensor demonstrated high sensitivity and fast response for hydrogen gas detection at low temperatures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Jatin J. Patil, Zhengmao Lu, Michael J. Zachman, Ningxin Chen, Kimberly S. Reeves, Asmita Jana, Griselda Revia, Brandon MacDonald, Brent D. Keller, Edgar Lara-Curzio, Jeffrey C. Grossman, Nicola Ferralis
Summary: Graphene oxide (GO) is a promising membrane material that can be used for chemical separations, including water treatment. However, often chemical modifications are needed to improve the permeability, performance, or mechanical integrity of GO membranes. In this study, we explore two different feedstocks of GO and observe significant improvements in permeability and chemical stability. These findings are connected to differences in sheet stacking and oxide functional groups through various characterization approaches.
Article
Chemistry, Inorganic & Nuclear
Sriram Srinivasa Rao, Saidi Reddy Parne, P. Nagaraju, Venkata Satya Chidambara Swamy Vaddadi, Y. Vijayakumar, Damodar Reddy Edla
Summary: The effects of substrate temperature on the structural, morphological, optical properties, and gas-sensing performance of nanostructured tungsten oxide (WO3) thin films were investigated. The WO3 film prepared at a substrate temperature of 400℃ showed the best response to ammonia vapours.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Shane J. McCartan, Ilkan Calisir, Gary W. Paterson, Robert W. H. Webster, Thomas A. Macgregor, David A. Hall, Ian MacLaren
Summary: This study investigates the core-shell structures of BiFeO3-BaTiO3 mixed-oxide ceramics using conventional electron energy loss spectroscopy (EELS) and scanning precession electron diffraction (SPED) mapping. The results reveal the presence of a BaTiO3-rich pseudocubic shell, a BiFeO3-rich outer core, and an inner core with a different composition. These inner cores are non-polar and do not contribute to the ferroelectric properties.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
C. Calvo-Mola, V Torres-Costa, Y. Gonzalez, A. Ruediger, M. Sanchez, G. Santana, G. Contreras-Puente, C. de Melo, J. Ghanbaja, D. Horwat, O. de Melo
Summary: In this study, a novel system for hot wall evaporation of MoO3 was developed and characterized in a horizontal furnace under low vacuum atmosphere. Pure MoO3 material with a strong preferential orientation was obtained, and its properties were analyzed using electron microscopy, micro-Raman spectroscopy, and x-ray diffraction. The relationship between photoluminescence and Raman spectra with temperature was investigated. The temperature coefficients of the vibrational modes were reported and compared, and their relation with the thermal expansion coefficient was discussed. Additionally, the temperature dependence of photoluminescent contributions for MoO3 was studied, revealing an anomalous increase in intensity followed by normal quenching at high temperatures. The Shibata model was used to explain this anomalous effect.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Enrico Di Russo, Lorenzo Rigutti
Summary: The combination of atom probe tomography (APT) and optical spectroscopy has yielded original results in the field of semiconductor nanoscale heterostructures, providing a deeper understanding of carrier localization and recombination mechanisms in quantum-well systems through statistical correlation. Photoluminescence spectroscopy (PL) can be performed on APT samples, allowing for sequential correlations on a single nanoscale object with higher precision and accuracy.
Article
Materials Science, Multidisciplinary
Xinshu Zou, Mounika Rachakonda, Shufen Chu, Xiaoran Zhao, Joydip Joardar, Kolan Madhav Reddy
Summary: Rhombohedral Cr5Al8 nanoparticles were successfully synthesized and fabricated into dense bulk material with excellent hardness and fracture toughness, superior to its intermetallic compound counterpart.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Bhaskar Bhaduri
Summary: In this study, copper nanoparticles grown carbon nanofibers (Cu-CNFs) were synthesized on graphite powder using catalytic chemical vapor deposition (CVD) method with acetylene as the carbon source. The CNFs were heat treated under inert atmosphere, and the analysis showed that the synthesis followed tip growth mechanism, with the material being of high purity confirmed by EDS and XPS analysis.
Article
Chemistry, Physical
C. A. Betty, Sipra Choudhury, Alpa Shah
Summary: Nanocrystalline metal oxide thin films have higher sensitivity for toxic gas sensing at lower temperatures than their bulk counterparts, allowing for the miniaturization of sensors for wearable and portable field trials without sacrificing sensitivity, but with improved selectivity. The properties of nanomaterials, such as size, morphology, geometry, preparation methods, and composition, play a crucial role in the sensor's sensitivity, selectivity, response time, and stability. However, the commercialization of nanostructured materials for toxic gas sensing has been hindered by reliability issues. This review focuses on the advances in room temperature operating sensors and their toxic gas sensing mechanism based on the design of nanostructured metal oxide semiconductors and heterostructures, highlighting their high sensitivity, selectivity, and reliability.
SURFACES AND INTERFACES
(2023)
Review
Chemistry, Physical
Sapna Sinha, Jamie H. Warner
Summary: Transmission electron microscopy (TEM) is a vital tool for studying nanomaterials at the atomic level, with graphene playing a key role in facilitating the characterization of other materials and understanding their properties and interactions. The review highlights the use of TEM with graphene as a substrate for studying a wide range of nanomaterials, discussing the challenges and potential engineering applications in the future.
Article
Materials Science, Multidisciplinary
N. B. Pradeep, M. M. Rajath Hegde, G. C. Manjunath Patel, Khaled Giasin, Danil Yu Pimenov, Szymon Wojciechowski
Summary: This research article discusses the synthesis and characterization of a Ti alloy powder using a high-energetic ball milling process. The study focuses on the formation of ternary Ti alloy with Mg and Sr additions, and the characterization results show the generation of nonequilibrium intermetallic phases and partial amorphization during the ball milling process.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
Kunmo Koo, Stephanie M. Ribet, Chi Zhang, Paul J. M. Smeets, Roberto dos Reis, Xiaobing Hu, Vinayak P. Dravid
Summary: This study evaluated the strengths and limitations of gas-phase E-cell S/TEM technique, revealing degradation of image quality in an E-cell setup and exploring opportunities to improve imaging quality through intelligent choice of experimental parameters.
Article
Chemistry, Physical
M. A. Mazo, A. C. Caballero, J. Rubio
Summary: In this study, cheap, abundant, and easily-obtained carbon fillers such as graphite and carbon black were successfully incorporated into a silicon oxycarbide matrix to obtain dense crack-free bulk composites with enhanced electrical and thermal conductivities. Raman parameters were crucial for understanding the electronic and/or phonon transport in the composites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
N. Rajesh, Guru G. Mahesh, P. Venkataramaiah
Summary: This study focuses on manufacturing ABS samples using FDM technology and studying the tensile behavior and surface roughness under different process parameters. The results show that better tensile strength and surface finish can be achieved under specific parameter conditions.
ADVANCES IN MATERIALS AND PROCESSING TECHNOLOGIES
(2022)
Review
Biochemistry & Molecular Biology
Angela Scala, Giulia Neri, Nicola Micale, Massimiliano Cordaro, Anna Piperno
Summary: This manuscript collects the main design criteria for synthesizing bimetallic nanoparticles (BMNPs), with a focus on green route synthesis. The influence of experimental parameters on particle growth and colloidal stability is examined, and an overview of the nanotechnological applications and biological profile of BMNPs is presented.
Review
Chemistry, Physical
Carmelo Corsaro, Giulia Neri, Antonio Santoro, Enza Fazio
Summary: This article introduces the advantages and challenges of acrylate and methacrylate polymers, focusing on their applications in medical, electronic, food packaging, and environmental remediation fields. It also discusses the issue of their recyclability and describes the most influential strategies for recyclable composites based on acrylic polymers.
Article
Biochemistry & Molecular Biology
Rosamaria Pennisi, Maria Musarra-Pizzo, Tania Velletri, Antonino Mazzaglia, Giulia Neri, Angela Scala, Anna Piperno, Maria Teresa Sciortino
Summary: Nanotechnological progress has opened up new possibilities for improving conventional anticancer therapies, and graphene nanoplatforms have proven to be effective carriers for multiple bioactive compounds. The use of graphene engineered with cyclodextrins (GCD) has shown promising results in modulating cancer-related pathways and reducing toxic effects of drugs such as Doxorubicin (DOX).
Article
Polymer Science
Marta Rosati, Angela Acocella, Andrea Pizzi, Giorgio Turtu, Giulia Neri, Nicola Demitri, Nonappa, Giuseppina Raffaini, Bertrand Donnio, Francesco Zerbetto, Francesca Baldelli Bombelli, Gabriella Cavallo, Pierangelo Metrangolo
Summary: Tuning the self-assembly behavior of dendritic amphiphiles is a challenge for designing advanced nanomaterials. In this study, a new family of fluorinated Janus-type dendrimers (FJDs) was synthesized and their self-assembly behavior in water was investigated.
Article
Chemistry, Physical
Marcello Condorelli, Antonio Speciale, Francesco Cimino, Claudia Muscara, Enza Fazio, Luisa D'Urso, Carmelo Corsaro, Giulia Neri, Angela Maria Mezzasalma, Giuseppe Compagnini, Fortunato Neri, Antonina Saija
Summary: Gold nanoparticles (Au NPs) are highly regarded for their biocompatible nature and extensive biomedical applications. In our research, we investigated the bioproperties of functionalized Au NPs using LCCs for the first time. Results showed that the Au@LCC samples significantly reduced TNF gene expression and induced higher levels of heme oxygenase-1 gene expression compared to the 1:1 dispersion.
Article
Chemistry, Applied
Alexandru-Milentie Hada, Monica Potara, Simion Astilean, Annalaura Cordaro, Giulia Neri, Milo Malanga, Antonia Nostro, Antonino Mazzaglia, Angela Scala, Anna Piperno
Summary: In this study, we propose a mild, ecofriendly, and straightforward synthesis method for producing core-shell Au@Ag bimetallic nanoparticles for antibacterial nanomedicine and SERS imaging. The synthesis utilizes a cationic polymeric cyclodextrin as a reducing and stabilizing agent to obtain monodispersed and stable nanoparticles. The resulting nanoparticles show good antibacterial activity and can be used for various applications.
CARBOHYDRATE POLYMERS
(2022)
Article
Energy & Fuels
Salvatore Micari, Salvatore Foti, Antonio Testa, Salvatore De Caro, Francesco Sergi, Laura Andaloro, Davide Aloisio, Salvatore Gianluca Leonardi, Giuseppe Napoli
Summary: This article discusses the issue of capacity loss in lithium-ion batteries used in electric vehicles and presents experimental tests and analysis conducted on a lithium-ion battery for automotive applications. The research shows that the battery's lifetime and usage pattern are closely related, with different driving cycles causing varying degrees of capacity degradation. A lifetime model is proposed to calculate the total capacity loss, providing a reference for the design of electric vehicles.
Correction
Chemistry, Physical
Marcello Condorelli, Antonio Speciale, Francesco Cimino, Claudia Muscara, Enza Fazio, Luisa D'Urso, Carmelo Corsaro, Giulia Neri, Angela Maria Mezzasalma, Giuseppe Compagnini, Fortunato Neri, Antonina Saija
Article
Chemistry, Physical
Giulia Neri, Carmelo Iaria, Fabiano Capparucci, Gioele Capillo, Rosamaria Pennisi, Angelo Nicosia, Placido Giuseppe Mineo, Angela Scala, Maria Teresa Sciortino, Anna Piperno, Fabio Marino
Summary: In this study, a new fluorescent graphene platform was synthesized and its physicochemical properties were characterized. Both in vitro and in vivo experiments were conducted to evaluate the safety and toxicity of the graphene platform. The results showed that the fluorescent graphene had a reduced potential risk and exhibited a protective effect on the survival rate of zebrafish.
Article
Biophysics
Cristina Chirizzi, Lodovico Gatti, Maria Sancho-Albero, Victor Sebastian, Manuel Arruebo, Laura Uson, Giulia Neri, Jesus Santamaria, Pierangelo Metrangolo, Linda Chaabane, Francesca Baldelli Bombelli
Summary: Fluorine-19 (19F) magnetic resonance imaging (MRI) is an emerging technique for molecular imaging and cell tracking. This paper reports the development of a superfluorinated tracer called PERFECTA, as well as the use of differently coated PLGA NPs as promising 19F-MRI probes. The results show that the stabilized NPs with anionic surfactant exhibit optimal cellular uptake and shorter T1 relaxation times, enhancing the sensitivity of 19F-MRI.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Maria Sancho-Albero, Nazeeha Ayaz, Victor Sebastian, Cristina Chirizzi, Miguel Encinas-Gimenez, Giulia Neri, Linda Chaabane, Lluis Lujan, Pilar Martin-Duque, Pierangelo Metrangolo, Jesu's Santamaria, Francesca Baldelli Bombelli
Summary: Extracellular vesicles (EVs) are important for cell-to-cell communication and show potential as efficient delivery vectors. However, current imaging tools have limitations in understanding EV behavior in vivo. This study presents the use of fluorinated EVs containing PERFECTA, a branched molecule with 36 magnetically equivalent 19F atoms, for imaging biodistribution and EV delivery. The PERFECTA-EVs maintained the characteristics and morphology of native EVs while exhibiting strong 19F-NMR signal and good 19F relaxation times.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Chiara Abate, Giulia Neri, Angela Scala, Placido Giuseppe Mineo, Enza Fazio, Antonino Mazzaglia, Alex Fragoso, Ottavia Giuffre, Claudia Foti, Anna Piperno
Summary: The study demonstrates the successful electrochemical sensing of Hg(II) in aqueous solution using nanoassembly based on cationic cyclodextrin carbon nanotubes (CNT-CDs) and ferrocenylcarnosine (FcCAR). The CNTs were functionalized with beta-cyclodextrins (CDs) through a click chemistry reaction and subsequent reduction of residual nitrogen groups. The CNT-CDs were cast on screen-printed carbon electrodes (SPCEs) and their electrochemical response was evaluated using cyclic voltammetry (CV). The CNT-CD/FcCAR nanoassembly showed enhanced electroactive properties for Hg(II) detection. The sensor exhibited a linear concentration dependence in the range of 1-100 nM, with a sensitivity of 0.12 muA/nM, a limit of detection of 0.50 nM, and a limit of quantification of 1 nM.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Rayhane Zribi, Angelo Ferlazzo, Enza Fazio, Marcello Condorelli, Luisa D'Urso, Giulia Neri, Carmelo Corsaro, Fortunato Neri, Giuseppe Compagnini, Giovanni Neri
Summary: This study fabricated and characterized a sensor based on silver nanoplates colloidal solutions deposited onto screen-printed carbon electrodes. The sensor showed wavelength-dependent and size-tunable electrochemical sensing response towards hydrogen peroxide (H2O2). The study also demonstrated the potential of using Ag nanoparticles with specific nanoplates morphology for electrochemical redox probes.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Proceedings Paper
Engineering, Biomedical
Rayhane Zribi, Enza Fazio, Marcello Condorelli, Luisa D'Urso, Giulia Neri, Carmelo Corsaro, Fortunato Neri, Giuseppe Compagnini, Giovanni Neri
Summary: This study investigates the hydrogen peroxide sensing characteristics of shape-tunable triangular Ag nanoplates thin films and shows their potential in producing portable detection devices. The sensitivity of the sensor is correlated with the aspect ratio and SPR peak position of the Ag nanoplates, with plasmon-enhanced reduction reaction improving the sensor performance. The results suggest that Ag-based nanomaterials can play a key role in the development of disposable, portable, on-site devices for H2O2 detection.
2022 IEEE INTERNATIONAL SYMPOSIUM ON MEDICAL MEASUREMENTS AND APPLICATIONS (MEMEA 2022)
(2022)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
