Article
Multidisciplinary Sciences
Bum Chul Park, Min Jun Ko, Young Kwang Kim, Gyu Won Kim, Myeong Soo Kim, Thomas Myeongseok Koo, Hong En Fu, Young Keun Kim
Summary: This study investigates the control of crystallographic alignment in nanomaterials through the influence of surface ligands on magnetite mesocrystals. The authors found that different surface ligands can lead to different alignment variations, which are guided by surface energy reduction and surface deformation. The alignment-dependent magnetic interactions between building blocks also affect the overall magnetic properties of mesocrystals and their chains.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Shoronia N. Cross, Majed Fataftah, Antranik Jonderian, Eric McCalla, Amy Szuchmacher Blum
Summary: This paper describes a synthetic approach to producing ultra-small (approximately 6 nm), monodisperse oleic acid-capped cobalt-doped magnetite (CoxFe(3-x)O(4)) nanoparticles using a modified co-precipitation method under mild conditions. XPS analysis revealed compositions of Co0.12Fe2.88O4, Co0.33Fe2.67O4, and Co0.58Fe2.42O4 for stoichiometric amounts of Co corresponding to x = 0.1, 0.3, and 0.5, respectively. The resulting CoxFe(3-x)O(4) nanoparticles showed higher saturation magnetization values than those reported for CoxFe3-xO(4) nanoparticles of similar size, monodispersity, and Co content prepared by other methods.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Physics, Condensed Matter
Krishna Priya Hazarika, Rushikesh Fopase, Lalit M. Pandey, J. P. Borah
Summary: This research aims to enhance the heating efficiency of Fe3O4 nanoparticles by doping Gd in the matrix, making it a potential candidate for magnetic hyperthermia applications.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Ceramics
Yong Hou, Guo-Hua Zhang, Kuo-Chih Chou
Summary: The study found that the atmosphere during melting and heat treatment, heat treatment temperature, Fe3O4 content, and basicity all had influences on the magnetic properties of magnetite-based glass ceramics. The saturation magnetisation and coercivity were affected by factors such as melting atmosphere, sintering temperature, Fe3O4 content, and basicity.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Leonardo Zanata, Aryane Tofanello, Herculano S. Martinho, Jose A. Souza, Derval S. Rosa
Summary: This study investigated the nanocluster formation of superparamagnetic iron oxide nanoparticles (IONPs) and cellulosic materials. The obtained clusters showed superparamagnetic behavior at room temperature and the size was influenced by the organic matrix. Microscopic and spectroscopic analysis revealed the morphology and crystal structure of the clusters, as well as the binding energies between IONPs and the cellulose matrixes.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Yanxin Chen, Chao Yang, Shaowu Jiu, Bo Zhao, Qiang Song
Summary: This study investigated the magnetic properties of roasted siderite ores and analyzed their washability under weak-magnetic-field conditions. The findings provide important reference for the development and application of siderite suspension magnetization roasting technology.
Article
Nanoscience & Nanotechnology
Qysar Maqbool, Arum Jung, Sojeong Won, Jinhan Cho, Jeong Gon Son, Bongjun Yeom
Summary: Research on the chiral magneto-optical properties of inorganic nanomaterials has shown enhanced activity in the visible range when using supra-assembled Fe3O4 magnetite nanoparticles at weak magnetic fields of 1.5 mT. The differences in magnetic circular dichroism responses are attributed to crystallinity, lattice distortion near grain boundaries, and dipolar interactions in the supra-assembled structures.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Jefferson F. D. F. Araujo, Eloi B. M. Junior, Leonardo A. F. Mendoza
Summary: This article presents the development of a magnetometer based on Hall effect sensors. By testing magnetic hysteresis data and using a dipole magnetic model, the moment of the samples can be measured effectively. Despite its low accuracy compared to commercial equipment, this device is cheap, versatile, and easy to build, making it useful for low-budget teaching and research laboratories.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Electrical & Electronic
Spartak S. Khutsishvili, Galina P. Aleksandrova, Tamara I. Vakul'skaya, Boris G. Sukhov
Summary: The study focuses on the macromolecular structure of iron-containing bionanocomposites based on natural polysaccharide arabinogalactan and evaluates the magnetic properties of Fe3O4 nanoparticles stabilized by the arabinogalactan matrix for biomedical applications.
IEEE TRANSACTIONS ON MAGNETICS
(2021)
Article
Engineering, Environmental
Kwandee Chamchoy, Thitirat Inprasit, Chutima Vanichvattanadecha, Apichya Thiangtrong, Patsaya Anukunwithaya, Penwisa Pisitsak
Summary: The use of sericin-coated magnetite nanoparticles as an adsorbent in water treatment proved to be effective in adsorbing cationic dyes from water, with a 40% higher efficiency compared to unmodified nanoparticles. The sericin coating was shown to control the size and morphology of the magnetite nanoparticles, resulting in improved adsorption performance. The adsorption process was physical in nature, forming multiple layers as confirmed by empirical data fitting well with the Freundlich isotherm.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Chemistry, Analytical
Monika Sobiech, Karol Synoradzki, Tamara J. Bednarchuk, Kamil Sobczak, Marta Janczura, Joanna Giebultowicz, Piotr Lulinski
Summary: This study reveals the complex nature of nanocrystalline magnetic cores and verifies the effectiveness of magnetic molecularly imprinted polymer (MMIP) as a sorbent for biomolecule analysis. The adsorbate-sorbent process is independent of the amount of siloxane functionalized magnetite core (Fe3O4@SiO2-MPS).
MICROCHEMICAL JOURNAL
(2022)
Article
Physics, Condensed Matter
Mohammad Jazirehpour, Omid Khani, Mahdi Jafari
Summary: The current study successfully synthesized hematite nanoparticles using hydrothermal method and achieved particles with different morphologies through adjusting the synthesis conditions. It was found that the aspect ratio of magnetite nanoparticles had a significant impact on their magnetic properties, and the magnetization intensity could be controlled by tuning the aspect ratio.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Multidisciplinary
Andrea Atrei, Fariba Fahmideh Mahdizadeh, Maria Camilla Baratto, Andrea Scala
Summary: The size, size distribution, and magnetic properties of magnetite nanoparticles prepared under different citrate conditions were investigated by XRD, DLS, EPR, and magnetization measurements. Citrate was found to affect the size and magnetic properties of the nanoparticles, with citrate-coated nanoparticles showing greater stability.
APPLIED SCIENCES-BASEL
(2021)
Article
Nanoscience & Nanotechnology
Sukanda Vaewbundit, Punnama Siriphannon
Summary: Crosslinked chitosan/iron oxide nanocomposites were successfully synthesized at low temperatures using aqueous systems. The nanocomposites exhibited superparamagnetism and high cell viability, making them promising candidates for alternative medical applications.
Article
Chemistry, Multidisciplinary
Jinglin Zhu, Meng Zhu, Juanjuan Peng
Summary: Developing highly active Fenton-like materials for water decontamination is currently a popular research topic. This study synthesized Fe3O4 rhombic dodecahedral nanoparticles with exposed {110} facets and utilized them as a Fenton-like catalyst for the degradation of bisphenol A. The results showed that Fe3O4-R/H2O2 achieved nearly 100% removal of BPA at pH=5.0, surpassing the effectiveness of commercial Fe3O4. By regulating the morphology of Fe3O4 nanoparticles, this study offers new insights into the Fenton-like oxidation process for pollutant degradation.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Physics, Applied
Pierfrancesco Maltoni, Tapati Sarkar, Gaspare Varvaro, Gianni Barucca, Sergey A. Ivanov, Davide Peddis, Roland Mathieu
Summary: The sol-gel synthesis was used to efficiently obtain nanocrystallites of SrFe12O19 (SFO) hexaferrite, allowing control over nanoparticle size and maintaining magnetic performance at lower annealing temperatures. The study shows the potential of this method in designing hard/soft exchange-coupled bi-magnetic nanocomposites.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Applied
Michele Petrecca, Beatrice Muzzi, Stefano Maria Oliveri, Martin Albino, Nader Yaacoub, Davide Peddis, Cesar de Julian Fernandez, Claudia Innocenti, Claudio Sangregorio
Summary: The article discusses the exploitation of exchange coupling between hard and soft magnetic materials to enhance the magnetic performance of rare-earth free permanent magnets. It reports the synthesis of nanometric SFO and zinc-doped ferrite composites through scalable and eco-friendly approaches. Despite promising results in forming exchange coupled composite at 1100 degrees C, there was no improvement in energy product, indicating a need for further experimental efforts.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Condensed Matter
Arkadiy Davydov, Antonio Sanna, Giorgio Concas
Summary: In this study, we characterized the crystallographic sites of Eu doping in Y2O3 using theoretical simulations, and analyzed the local structure, electronic properties, and stability of the sites. By constructing an experimental calibration curve, we can accurately estimate the isomer shift of any Eu compound.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Editorial Material
Chemistry, Multidisciplinary
Giuseppe Muscas, Petra E. Jonsson, M. Venkata Kamalakar
Summary: The effective magnetostriction of Co-nanowires is found to be independent of the bending direction, as shown by comparing magneto-optical experiments conducted with nanowires bent along and perpendicular to their long axis.
Article
Materials Science, Multidisciplinary
Valentina Piotto, Lucio Litti, Alexander Omelyanchik, Alessandro Martucci, Piero Riello, Davide Peddis, Moreno Meneghetti
Summary: Measurement of magnetic nanoparticles is important for their application. Conventional techniques like SQUIDs or VSMs require large amounts of materials and cannot explore low production syntheses. In this study, optically detected magnetophoresis was used to characterize the magnetic properties of nanoparticles obtained from laser ablation. The results show that considering the size-dependent extinction properties of nanoparticles is necessary, especially for polydisperse samples.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Alessandra Geddo Lehmann, Giuseppe Muscas, Maurizio Ferretti, Emanuela Pusceddu, Davide Peddis, Francesco Congiu
Summary: We investigated the structural and magnetic properties of 20 nm-sized nanoparticles of the half-doped manganite Ho0.5Ca0.5MnO3 prepared by sol-gel approach. The nanoparticles exhibited Pbnm orthorhombic symmetry and showed orbital ordering below room temperature. The temperature dependence of magnetization indicated the presence of charge ordering, and the formation of a superlattice magnetic phase at lower temperatures.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Giuseppe Muscas, K. Prabahar, Francesco Congiu, Gopal Datt, Tapati Sarkar
Summary: The complex nanostructure of magnetic double perovskite oxides is responsible for their magnetic behavior. This study reveals the complex nanostructure of polycrystalline Sm2CoMnO6 and how it drives its magnetic behavior using experimental and micromagnetic simulation results. The findings provide a clear understanding of the role of nanostructure and antisite defects in the magnetic behavior of double perovskite oxides.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Beatrice Muzzi, Elisabetta Lottini, Nader Yaacoub, Davide Peddis, Giovanni Bertoni, Cesar de Julian Fernandez, Claudio Sangregorio, Alberto Lopez-Ortega
Summary: This study demonstrates that low-temperature solvent-mediated thermal treatment is an effective post-treatment method for enhancing magnetic hardening of chemically synthesized nanoparticles by reducing local internal stress. The method increases the coercive field, energy product, and magnetic energy storage capability of the particles without affecting their other magnetic properties. The mechanism behind the improvement is the reduction of internal stresses induced by the low-temperature annealing treatment. The choice of medium for the annealing process is crucial for controlling the final properties of the nanoparticles.
ACS APPLIED NANO MATERIALS
(2022)
Article
Crystallography
Fabrizio Davi, Daniele Rinaldi, Luigi Montalto
Summary: Photoelasticity as a technique can be used for internal stress detection and quality control in crystals. However, to fully exploit its potentials, a suitable theoretical analysis is required for different crystallographic structures and observation planes. For cubic crystal specimens with non-coherent geometry with crystallographic directions, a set of equations can be derived to estimate the refractive indices based on residual stress. An explicit estimate of the residual stress intensity can be obtained for cubic crystals if the piezo-optic tensor component, orientation of two non-parallel specimen faces with respect to crystallographic axes, and principal directions of refractive indices on the observation face are known.
Article
Chemistry, Multidisciplinary
Pierfrancesco Maltoni, Gianni Barucca, Bogdan Rutkowski, Maria Chiara Spadaro, Petra E. Jonsson, Gaspare Varvaro, Nader Yaacoub, Jose A. De Toro, Davide Peddis, Roland Mathieu
Summary: The magnetic coupling of SrFe12O19/CoFe2O4 nanocomposites is investigated. The structural coherence and texture at the interfaces of the nanostructures are evidenced by advanced electron microscopy. The exchange intergranular interaction is evidenced and the critical thickness for uniform reversal of coupled interfaces is quantified.
Article
Multidisciplinary Sciences
Giuseppe Muscas, Robert Johansson, Sebastian George, Martina Ahlberg, Dimitri Arvanitis, Rajeev Ahuja, Ralph H. Scheicher, Petra E. Jonsson
Summary: In this study, the detailed structure of amorphous Fe(1-X)ZrX alloys with different compositions was explored using atomistic simulations and experimental characterisation. The local atomic arrangements were investigated through various methods such as radial-and angular-distribution functions and Voronoi tesselation. A model based on the radial distribution functions was used to fit the experimental EXAFS data, providing a simple yet accurate description of the atomic structures for different compositions. This approach improves the understanding of structure-property relationships and facilitates the development of amorphous alloys with tailored functional properties.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Mehran Sedrpooshan, Claudiu Bulbucan, Pau Ternero, Pierfrancesco Maltoni, Calle Preger, Simone Finizio, Benjamin Watts, Davide Peddis, Adam M. Burke, Maria E. Messing, Rasmus Westerstrom
Summary: In this paper, a template-free technique is proposed to produce 1D magnetic nanochains and nanowires directly on substrates and device architectures through the directed self-assembly of gas-phase-generated nanoparticles. It is found that the orientation of the nanochains and the presence of multi-domain particles play a key role in domain formation and magnetization reversal, while the improved magnetic properties of the nanowires can be attributed to the uniform formation of magnetocrystalline anisotropy and the onset of exchange interactions.
Article
Chemistry, Physical
Pierfrancesco Maltoni, Miran Baricic, Gianni Barucca, Maria Chiara Spadaro, Jordi Arbiol, Nader Yaacoub, Davide Peddis, Roland Mathieu
Summary: This study demonstrates an efficient synthetic approach to control the magnetic coupling between a hard-magnetic matrix and nanoparticles in order to produce strongly magnetically coupled nanocomposites. The final extrinsic properties of the composites can be tuned by controlling the agglomeration of the nanoparticles in the matrix and their elemental doping.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Giuseppe Muscas, Francesco Congiu, Giorgio Concas, Carla Cannas, Valentina Mameli, Nader Yaacoub, Rodaina Sayed Hassan, Dino Fiorani, Sawssen Slimani, Davide Peddis
Summary: This study investigates the magnetic properties and transition between volume and surface-driven properties of spinel iron oxide nanoparticles. The results reveal a transition in the range of 5-7 nm.
NANOSCALE RESEARCH LETTERS
(2022)
