Article
Chemistry, Multidisciplinary
Hafsa Khurshid, Rahana Yoosuf, Bashar Afif Issa, Atta G. Attaelmanan, George Hadjipanayis
Summary: Cobalt nanowires were synthesized with varying spacing-to-diameter ratios, and it was found that the easy magnetization direction switches from parallel to perpendicular to the nanowire growth direction under certain conditions. The magnetic interactions among the nanowires were mainly through dipolar interactions, resulting in additional uniaxial anisotropy. Further reduction in spacing-to-diameter ratio led to isotropic behavior in the nanowires' magnetic properties.
Article
Nanoscience & Nanotechnology
Mohammed H. Abbas, A. Ramazani, A. H. Montazer, M. Almasi Kashi
Summary: By using pulsed electrochemical deposition, we fabricated FeNi/Cu nanowire arrays and investigated the angle-dependent magnetization reversal properties and magnetostatic interactions. The results show that the magnetization reversal is influenced by vortex domain wall and single vortex modes, exhibiting different trends at high field angles.
Article
Chemistry, Multidisciplinary
Aleksei Yu Samardak, Yoo Sang Jeon, Vadim Yu Samardak, Alexey G. Kozlov, Kirill A. Rogachev, Alexey Ognev, Eunjin Jeong, Gyu Won Kim, Min Jun Ko, Alexander S. Samardak, Young Keun Kim
Summary: This study discusses the magnetic behavior of metallic barcode nanowires (BNWs) and the influence of geometrical parameters on their interactions. By controlling the current densities and electrodeposition time, the size of the nanowires can be regulated. The study reveals that the effect of weak magnetism in Au segments on the interaction field between nanowires differs depending on the length of the segments. Micromagnetic simulations discover three types of magnetostatic interactions in the BNW arrays.
Article
Materials Science, Multidisciplinary
Junqing Han, Yuying Wu, Kai Zhao, Haoran Wang, Shushuai Liu, Xiangfa Liu
Summary: Cu foil was prepared with columnar grain growth and equiaxed grain growth with different average grain sizes by direct current electrodeposition. The correlation between the microstructures and properties of Cu foil under different grain growth methods was elucidated using EBSD, XRD, AFM, and TEM. The columnar-grown copper exhibited a remarkable preferential ratio of {220} orientation, while the equiaxed grain growth showed a superiority in {200} crystal orientation. The twin boundary density in copper foil increased as the grain growth mode changed, and grain refinement was beneficial to increase the twin boundary density.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Multidisciplinary Sciences
Rajesh Kumar, Jie Chen, Avanish Mishra, Avinash M. Dongare
Summary: This study uses molecular dynamics simulations to characterize the plasticity contributions and damage evolution behavior of various interface microstructures. The results suggest that pre-deformation affects both the dynamic strength and correlation with interface energy.
SCIENTIFIC REPORTS
(2023)
Article
Physics, Applied
Liang Zhang, Wei-Min Long, Nan Jiang, Kai-Kai Xu, Mu-Lan Li, Zhi-Hao Li
Summary: The study demonstrates that an appropriate amount of SiC nanowires can enhance the shear strength and wettability of brazed joints, but excessive addition can decrease these properties.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2022)
Article
Metallurgy & Metallurgical Engineering
Si-wei Luo, Yue Wu, Biao Chen, Min Song, Jian-hong Yi, Bai-song Guo, Qi-wei Wang, Yong Yang, Wei Li, Zhen-tao Yu
Summary: Carbon nanotubes (CNTs) reinforced Al-Cu matrix composites were prepared by hot pressing sintering and hot rolling, and the effects of Cu content on the interfacial reaction, precipitation behavior, and mechanical properties were investigated. The increase of Cu content can improve the strength, elastic modulus, and hardness of the composites, and change the dominant strengthening mechanisms.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Multidisciplinary
Shanmukha Kiran Aramanda, Kamanio Chattopadhyay, Abhik Choudhury
Summary: The paper investigates the evolution of complex patterns in the ternary Ag-Cu-Sb eutectic system, revealing the formation mechanisms of various microstructures, including three-phase eutectic and two-phase growth instabilities. Different microstructures emerge as a result of distinct crystal orientations and growth mechanisms in the presence of temperature gradients.
Article
Materials Science, Multidisciplinary
Rensong Huang, Hongfu Yang, Peng Sun, Shanju Zheng, Mengnie Li, Yonghua Duan
Summary: This study investigated the influence of Mg content on the microstructure and corrosion behavior of homogenized Al-Zn-Mg-Cu alloys. The findings showed that alloys with moderate Mg content exhibited significantly lower corrosion rate and depth. These findings are important for enhancing the corrosion resistance of the alloys.
Article
Chemistry, Physical
Ziqiang Mei, Zhiyi Liu, Song Bai, Jian Wang, Jing Cao
Summary: The addition of yttrium can significantly improve the strength properties of Al-CuMg-Ag alloys, but it also suppresses the precipitation of the Omega phase, leading to decreased strength of the alloy. The negative effect of yttrium is directly related to the formation of blocky (Cd, Ag, Ti, V, Y)-rich intermetallics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Ningning Dong, Lingxiong Sun, Hongbin Ma, Peipeng Jin
Summary: The cryogenic treatment was found to refine grains and promote the precipitation of second phases, enhancing the strength and plasticity of Mg alloys. Changes in macro-texture also significantly improved the plasticity of the alloy. Understanding macro-texture and microstructures during cryogenic treatment is crucial for enhancing the mechanical properties of Mg alloys.
Article
Chemistry, Multidisciplinary
Song Hee Lee, Noeul Kim, Ji Hwan Jeong, Bo-Hye Kim, Hak Ki Yu, Myung Hwa Kim
Summary: The direct phase transformation of ReO3 nanorods into 2D nanosheets of ReS2 on carbon fibres (CNFs) using a reducing heat treatment and induction of a sulfurization reaction is reported. The gas sensing abilities for NO2 and H-2 were also explored by investigating the change of electrical characteristics of both 2D ReS2 nanosheets and ReO3 nanorods on CNFs.
Article
Materials Science, Multidisciplinary
Pengyan Mao, Jingping Cui, Zhao Cheng, Lingling Yang, Hui Zhao, Hongda Li, Kaiping Tai
Summary: Grain size is a critical factor in determining the properties of materials, but it is difficult to control quantitatively, especially at the nanoscale. By increasing the preparation temperature during magnetron sputtering, the average grain size of pure Cu film can be enhanced from 23 to 557 nm. However, the temperature effect is weakened after adding W to the Cu matrix, with only a slight increase in grain size from 30 to 145 nm for Cu96W4 samples. The addition of W affects the diffusion of Cu atoms during the magnetron sputtering process, forming a Cu-W supersaturated solid solution at low temperatures but causing W atoms to agglomerate at elevated temperatures. Furthermore, W addition significantly enhances the irradiation tolerance, leading to the formation of fewer and smaller cavities in Cu96W4 samples compared to pure Cu after He ions irradiation at 673 K.
Article
Nanoscience & Nanotechnology
Jingjing Wang, Jingyi Fan, Wei Li, Ping Liu, Xun Ma, Ke Zhang, Fengcang Ma, Xiaohong Chen, Peter K. Liaw
Summary: The (TiTaCrMoNb)Nx films with nitrogen content were prepared on the surfaces of TC4 by magnetron sputtering and their microstructures and mechanical properties were investigated. It was found that the deposition rates of the films decrease with the increase of nitrogen flow, and the structures of the films change from BCC to FCC phase composed of Me-N. The hardness of the films shows a trend of first increasing and then decreasing with increasing nitrogen flow, with the highest value achieved at an Ar/N2 flow ratio of 25:25.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Physics, Condensed Matter
R. Nemati, M. H. Abbas, A. Ramazani, Almasi Kashi
Summary: FeCo/Cu multilayer nanowire arrays are fabricated using pulsed electrodeposition in anodic aluminum oxide templates with 50 nm pore diameter. The thicknesses of the magnetic layer (LFeCo) and nonmagnetic layer (LCu) range from 23-225 and 2-50 nm, respectively. By examining the magnetic behavior of the multilayer nanowires, it is found that a thin Cu layer exhibits similar behavior to alloy nanowires. The coercive field in FeCo/Cu multilayer nanowires shows dual behavior with a threshold LCu, which is attributed to an increase in magnetizing and demagnetizing interactions.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Biochemistry & Molecular Biology
Ibwanga S. Mosse, Venkateswara Rao Sodisetti, Christopher Coleman, Siphephile Ncube, Alvaro S. de Sousa, Rudolph M. Erasmus, Emmanuel Flahaut, Thomas Blon, Benjamin Lassagne, Tomas Samoril, Somnath Bhattacharyya
Summary: The degree of chemical functionalization associated with molecular magnet loading can be utilized for controlled tuning the magnetic properties of a CNT-lanthanide hybrid complex. This controlled loading has led to a significant change in the nanotube intrinsic diamagnetism, showing antiferromagnetic coupling with increase in the Weiss temperature with respect to increased loading. This indicates the potential for developing novel spintronic technologies through a carbon-based hybrid material.
Article
Chemistry, Multidisciplinary
Tristan da Camara Santa Clara Gomes, Nicolas Marchal, Flavio Abreu Araujo, Yenni Velazquez Galvan, Joaquin de la Torre Medina, Luc Piraux
Summary: Electrochemical deposition technique allows for the fabrication of mechanically stable three-dimensional magnetic nanostructures with large surface area, providing the possibility to control the geometric characteristics and material composition of interconnected magnetic nanowire or nanotube networks, fine-tuning their magnetic and magneto-transport properties.
Article
Chemistry, Multidisciplinary
Pierre Moritz, Antoine Gonon, Thomas Blon, Nicolas Ratel-Ramond, Fabrice Mathieu, Pierre Farger, Juan-Manuel Asensio-Revert, Simon Cayez, David Bourrier, Daisuke Saya, Liviu Nicu, Guillaume Viau, Thierry Leichle, Lise-Marie Lacroix
Summary: This study presents a versatile approach for the fabrication and direct integration of nanostructured magnetic materials onto silicon substrates, using magnetophoresis-assisted capillary assembly to create high-performance magnets and supercrystals. Sub-millimeter and self-standing magnets with magnetic properties comparable to NdFeB-based composites were obtained through this cost- and time-efficient process. The proof-of-concept of electromagnetically actuating a MEMS cantilever with these supercrystals highlights their potential as efficient integrated magnetic materials in portable devices.
Article
Chemistry, Multidisciplinary
Cyril Garnero, Alexandre Pierrot, Christophe Gatel, Cecile Marcelot, Raul Arenal, Ileana Florea, Anne Bernand-Mantel, Katerina Soulantica, Patrick Poveda, Bruno Chaudret, Thomas Blon, Lise-Marie Lacroix
Summary: Single crystalline magnetic FeCo nanostars with a unique octahedral structure exposing {311} facets were prepared using an organometallic method under mild conditions, exhibiting high magnetization comparable to bulk materials. The study revealed complex 3D spin configurations resulting from the competition between dipolar and exchange interactions, which are stabilized by the high aspect ratio tetrahedral branches of the nanostars. The research demonstrates significant tuning of magnetic properties through nanoscale shape control.
Article
Physics, Applied
E. Figueroa-Gonzalez, R. Mendoza, A. Oliva, C. Gomez-Solis, L. S. Valle-Garcia, E. Oliva, V Rodriguez-Gonzalez, A. Encinas, J. Oliva
Summary: We report on the fabrication and electrochemical characterization of biodegradable and flexible supercapacitors. These supercapacitors use graphene nanoplates coated coconut fibers as conductive electrodes, an oral electrolyte solution and rice paper as electrolyte and separator. By adding MgTiO3 nanoparticles to the anode, the capacitance and specific energy of the supercapacitors were enhanced. The biodegradable cells exhibited long discharge times and stable output voltage, which have not been observed previously for such supercapacitors.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Adria Garcia-Gil, Subhajit Biswas, Ahin Roy, Dzianis Saladukh, Sreyan Raha, Thomas Blon, Michele Conroy, Valeria Nicolosi, Achintya Singha, Lise-Marie Lacroix, Justin D. Holmes
Summary: In this study, we successfully fabricated a metastable allotrope of tetragonal germanium (ST12-Ge) in the form of nanowires. The nanowires were synthesized using a solvothermal-like single-pot method and a self-seeded vapour-liquid-solid mechanism. The ST12-Ge nanowires showed unique physical properties and had a significant impact on light emission intensity and bandgap directness.
Article
Physics, Multidisciplinary
Ilona Lecerf, Pierre Moritz, Jose Elias Angulo-Cervera, Fabrice Mathieu, David Bourrier, Liviu Nicu, Thierry Leichle, Frederico Orlandini-Keller, Thibaut Devillers, Nora M. Dempsey, Guillaume Viau, Lise-Marie Lacroix, Thomas Blon
Summary: Wireless sensor networks are becoming increasingly important in our daily lives, but energy supply remains a major constraint. Harvesting mechanical energy to replace batteries is an alternative solution. Using finite element simulations, we provide a complete guideline for optimizing the design of a MEMS electromagnetic energy harvester.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2022)
Article
Chemistry, Multidisciplinary
Shanshan Guo, Mara Henschel, Daniel Wolf, Darius Pohl, Axel Lubk, Thomas Blon, Volker Neu, Karin Leistner
Summary: As the size of magnetic devices decreases, the understanding of three-dimensional nanomagnets and their magnetic configurations becomes increasingly important. In this study, single-crystal iron nanocuboids with varying sizes were synthesized using progressive nucleation during epitaxial nano-electrodeposition. The size-dependent magnetic configurations of these nanocuboids were investigated and a magnetic configuration versus size phase diagram was established. Both experimental and theoretical results demonstrated a sequential transition of magnetic configurations from Landau pattern to vortex and finally single domain as the nanocuboid sizes decrease. This research approach provides a quantitative understanding of magnetic configurations in a broad size range and can be applied to other materials and shapes, offering an advanced route for future nanodevice design.
Article
Nanoscience & Nanotechnology
Deliang Yi, Yuanyuan Min, Beatrice Muzzi, Audrey Marty, Idaline Romana, Pier-Francesco Fazzini, Thomas Blon, Guillaume Viau, Philippe Serp, Katerina Soulantica
Summary: This study reveals the influence of ligands on the catalytic performance of cobalt nanoparticles by comparing different cobalt nanostructures. In the hydrogenation of cinnamaldehyde, supported spherical epsilon-Co nanoparticles exhibit high activity and excellent selectivity, which differs from hexagonal close-packed cobalt nanorods exposing different crystal facets. The concentration of ligands on the surface of the nanostructures affects their catalytic performance, with higher concentrations favoring both activity and selectivity. These findings are of great significance for further exploration of epsilon-Co nanoparticles in other catalytic reactions where the cobalt crystal structure may play an important role.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Pierre Moritz, Ilona Lecerf, Antoine Gonon, Georgiana Maties, Thomas Blon, Simon Cayez, David Bourrier, Fabrice Mathieu, Jose Elias Angulo-Cervera, Liviu Nicu, Thierry Leichle, Thierry Ondarcuhu, Guillaume Viau, Lise-Marie Lacroix
Summary: The direct integration of performant permanent magnets within miniaturized circuits is still a challenge. The magnetophoresis-driven capillary assembly of hard magnetic nanoparticles offers a promising solution. Soft magnetic blocks are used to generate the required magnetic field gradients for the assembly. The overall magnetic properties are affected by the presence of these soft elements, but the performance of the permanent magnet can be preserved with reduced soft element volumes. The hybrid Ni-Co-Ni structures can generate high magnetic induction for the electromagnetic actuation of microelectromechanical resonant sensors.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Physical
D. Yi, L. Peres, A. Pierrot, S. Cayez, R. Cours, B. Warot-Fonrose, C. Marcelot, P. Roblin, K. Soulantica, T. Blon
Summary: The organization of nano-objects on macroscopic surfaces is crucial for the advancement and application of nanotechnologies. This study demonstrates the growth and self-organization of metallic nanowires into hexagonal superlattices on surfaces, with the ability to tune the characteristic lengths depending on the stabilizing surfactants used.
Article
Chemistry, Physical
Georgiana Maties, Marion Luu, Kosseila Ait-Oukaci, Ilona Lecerf, Cecile Marcelot, Anais Fondet, Simon Cayez, Christophe Gatel, Thomas Blon, Bruno Chaudret, Lise-Marie Lacroix
Summary: This study reports a simple method to synthesize magnetic nanoparticles with anisotropic shapes, and control their size by tuning the reaction conditions. The experimental results combined with computational simulations demonstrate the significance of shape anisotropy in magnetic nanoparticles.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Physics, Applied
A. Lobo Guerrero, A. Encinas, E. Araujo, L. Piraux, J. de la Torre Medina
Summary: The crystalline texture of arrays of low diameter Co nanowires synthesized by electrodeposition using electrolytes with different acidities was studied. The switching field distribution (SFD) and first order reversal curve (FORC) diagrams were used to analyze the magnetic behavior and microstructure of the nanowires. The analysis of SFD was complemented and validated with FORC diagram measurements, providing a novel methodology for studying the interplay between microstructure and magnetic behavior of nanowire arrays.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
A. Molina, K. P. Padmasree, V. Escobar-Barrios, A. I. Mtz-Enriquez, A. Zakhidov, A. Encinas, J. Oliva
Summary: This study presents the performance of a flexible and biodegradable temperature sensor made with avocado peel, graphene, carbon nanotubes, and a perovskite material. The addition of perovskite significantly improves the response time of the sensor, and it retains good performance even after bending cycles. Furthermore, the formation of amorphous carbon and structural defects on the sensor's surface enhances its sensitivity.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Physics, Applied
A. Pierrot, D. Yi, L. Peres, K. Soulantica, R. Cours, B. Warot-Fonrose, C. Marcelot, M. Respaud, F. Beron, T. Blon
Summary: Ultradense arrays of magnetic nanoelements with high switching fields and low standard deviations were studied. The switching field distribution in bottom-up synthesized single-crystalline vertical Co nanowires self-organized in 2D hexagonal superlattices was characterized. The results provide insights into the magnetic properties of nanowire arrays and their potential for magnetic recording media.
APPLIED PHYSICS LETTERS
(2023)
