A5031593969- Magnetic properties of thin films
- Metallic Glasses and Amorphous Alloys
- Anodic Oxide Films and Nanostructures
- Electrocatalysts for Energy Conversion
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Nanoporous metals and alloys
- Chalcogenide Semiconductor Thin Films
- Magnetic Properties and Applications
- Glass properties and applications
- Surface and Thin Film Phenomena
- Multiferroics and related materials
- Theoretical and Computational Physics
- Characterization and Applications of Magnetic Nanoparticles
- Advanced Memory and Neural Computing
- Catalytic Processes in Materials Science
- Physics of Superconductivity and Magnetism
- ZnO doping and properties
- Semiconductor materials and devices
- Magnetic and transport properties of perovskites and related materials
- Phase-change materials and chalcogenides
- Advanced Photocatalysis Techniques
- Material Dynamics and Properties
- Ferroelectric and Piezoelectric Materials
- Gas Sensing Nanomaterials and Sensors
Italian Institute of Technology
2022-2025
University of Cambridge
2018-2023
Far Eastern Federal University
2011-2022
Institute of High Current Electronics
2015-2022
Erich Schmid Institute of Materials Science
2017-2021
Austrian Academy of Sciences
2017-2021
Institute of Automation and Control Processes
2011-2021
Far Eastern Branch of the Russian Academy of Sciences
2021
King Abdullah University of Science and Technology
2014-2019
National Research Tomsk State University
2015
We perform a systematic study based on micromagnetic simulations of the demagnetization process for cylindrical nanowires with different crystalline structure. These correspond to most commonly reported electrodeposited nanowires, permalloy, nickel, iron and cobalt, crystal structure tailored by electrodeposition parameters. The dependence coercivity remanence nanowire diameter, angular corresponding reversal modes are calculated discussed. Extensive comparison obtained coercive field value...
Cylindrical magnetic nanowires are attractive materials for next generation data storage devices owing to the theoretically achievable high domain wall velocity and their efficient fabrication in highly dense arrays. In order obtain control over motion, reliable well-defined pinning sites required. Here, we show that modulated consisting of alternating nickel cobalt sections facilitate at interfaces those sections. By combining electron holography with micromagnetic simulations, effect can...
The large plasticity observed in newly developed monolithic bulk metallic glasses under quasi-static compression raises a question about the contribution of atomic scale effects. Here, nanocrystals on order 1-1.5 nm size are within an Fe-based glass using aberration-corrected high-resolution transmission electron microscopy (HRTEM). accumulation is linked to presence hard and soft zones, which connected micro-scale hardness elastic modulus confirmed by nanoindentation. Furthermore, we...
We have synthesized nanowires with an iron core and oxide (magnetite) shell by a facile low-cost fabrication process. The magnetic properties of the can be tuned changing thicknesses to yield remarkable new multi-functionality. A multi-domain state at remanence obtained, which is attractive feature for biomedical applications, where low desirable. also encoded different values. Notably, oxidation process single-crystal halts thickness 10 nm. these acts as passivation layer, retaining even...
The influence of cryothermal treatment on the mechanical properties metallic glasses with different compositions was investigated in present work. It found that cycling can induce rejuvenation as well relaxation glasses. local apparent Young’s modulus and its spatial distribution width surface glass increase after cycling, while bulk effect depends composition. appeared this is temporary disappears a period room temperature aging. This connected large times due to their heterogeneous...
Simultaneously achieving both broad absorption and sharp emission in the near-infrared (NIR) is challenging. Coupling of an efficient absorber such as lead halide perovskites to lanthanide emissive species a promising way meet demands for visible-to-NIR spectral conversion. However, lead-based perovskite sensitizers suffer from relatively narrow visible range, poor stability, toxicity. Herein, we introduce downshifting configuration based on lead-free cesium manganese bromide nanocrystals...
The most developed approaches for the synthesis of InAs nanocrystals (NCs) rely on pyrophoric, toxic, and not readily available tris-trimethylsilyl (or tris-trimethylgermil) arsine precursors. Less toxic commercially chemicals, such as tris(dimethylamino)arsine, have recently emerged alternative As Nevertheless, NCs made with compounds need to be further optimized in terms size distribution optical properties order meet standard reached arsine. To this aim, work we investigated role ZnCl2...
Halide exchange is a popular strategy to tune the properties of CsPbX3 nanocrystals after synthesis. However, while Cl → Br and I exchanges proceed through formation stable mixed-halide nanocrystals, ⇌ more elusive. Indeed, large size difference between chloride iodide ions causes miscibility gap in CsPbCl3-CsPbI3 system, preventing isolation CsPb(ClxI1-x)3 nanocrystals. Yet, previous works have claimed that full CsPbCl3 CsPbI3 can be achieved. Even interestingly, interrupting prematurely...
InAs-based nanocrystals can enable restriction of hazardous substances (RoHS) compliant optoelectronic devices, but their photoluminescence efficiency needs improvement. We report an optimized synthesis InAs@ZnSe core@shell allowing to tune the ZnSe shell thickness up seven mono-layers (ML) and boost emission, reaching a quantum yield ≈70% at ≈900 nm. It is demonstrated that high be attained when least ≈3ML. Notably, lifetimeshows only minor variation as function thickness, whereas Auger...
Abstract Nanoporous metals are a class of nanostructured materials finding extensive applications in multiple fields thanks to their unique properties attributed high surface area and interconnected nanoscale ligaments. They can be prepared following different strategies, but the deposition an arbitrary pure porous metal is still challenging. Recently, dry synthesis nanoporous films based on plasma treatment thin layers deposited by physical vapour has been demonstrated, as general route...
The preparation of magnetic nanopillars from anodic alumina templates represents a cheap way to obtain extensive ordered arrays, and thus is very appealing for nanotechnology applications. In this paper we report the arrays Co with 120 nm height varying diameter. high anisotropy offers an additional possibility control their properties. properties are studied both experimentally by micromagnetic simulations. Experiment modeling show crucial changes hysteresis loops when diameter increased....
This paper reports the fabrication and characterization of a new type magnetoelectric polymer nanocomposite that exhibits excellent ferromagnetism ferroelectricity simultaneously at room temperature. The multiferroic consists high aspect ratio ferromagnetic iron nanowires embedded inside ferroelectric co-polymer poly(vinylindene fluoride-trifluoroethylene), P(VDF-TrFE). has been fabricated via simple low temperature spin coating technique. Structural, ferromagnetic, ferroelectric, properties...
Abstract The exploitation of the optimal optical properties lead halide perovskite nanocrystals in optoelectronic devices is mainly hindered by low stability such materials. Here, a molten‐salts approach developed to encapsulate CsPbBr 3 (together with KNO , NaNO and KBr inorganic salts) inside different nanoscale mesoporous SiO 2 host matrices, having sizes between 100 300 nm. comparison products, including previously reported ≥600‐nm‐sized /m‐SiO composite, indicates that 100‐nm‐sized...
Cluster-assembled nanostructured gold films are renowned for exhibiting neuromorphic properties, making them pivotal components in receptrons. Receptrons, which extend the perceptron framework, specifically crafted classification of Boolean functions due to their distinctive properties. However, current understanding phenomena underpinning this behavior is based on overall electrical measurements and speculative modeling. In situ biasing heating transmission electron microscopy (TEM) imaging...
Cobalt nanowires, 40 nm in diameter and several micrometers long, have been grown by controlled electrodeposition into ordered anodic alumina templates. The hcp crystal symmetry is tuned a suitable choice of the electrolyte pH (between 3.5 6.0) during growth. Systematic high resolution transmission electron microscopy imaging analysis diffraction patterns reveals dependence orientation from pH. tailored modification crystalline signature results reorientation magnetocrystalline anisotropy...
Abstract A facile strategy is reported for the synthesis of Fe/Co mixed metal oxide nanoparticles supported on, and embedded inside, high purity oxidized multiwalled carbon nanotubes (MWCNTs) narrow diameter distribution as effective bifunctional catalysts able to reversibly drive oxygen evolution reaction (OER) reduction (ORR) in alkaline solutions. Variation ratio resulted a pronounced trend ORR/OER activity. Controlled in‐depth characterization enabled identification an optimal...
Abstract Magnetic vortex-based media have recently been proposed for several applications of nanotechnology; however, because lithography is typically used their preparation, low-cost, large-scale fabrication a challenge. One solution may be to use arrays densely packed cobalt nanowires that efficiently fabricated by electrodeposition. In this work, we present type nanoscale magnetic structures can hold multiple stable vortex domains at remanence with different chiralities. The state...
The single-phase multi-principal-component CoFeMnTiVZr alloy was obtained by rapid solidification and examined a combination of electrochemical methods gas-solid reactions. X-ray diffraction high-resolution transmission electron microscopy analyses reveal hexagonal Laves-phase structure (type C14). Cyclic voltammetry impedance spectroscopy investigations in the hydrogen absorption/desorption region give insight into kinetics change desorption charge terms applied potential. thickness...
Abstract A combination of complementary high-energy X-ray diffraction, containerless solidification during electromagnetic levitation and transmission electron microscopy is used to map in situ the phase evolution a prototype Cu-Zr-Al glass flash-annealing imposed at rate ranging from 10 2 3 K s −1 cooling liquid state. Such experimental techniques provides hitherto inaccessible insight into phase-transformation mechanism its kinetics with high temporal resolution over entire temperature...
Abstract Currently, predominant high‐performance permanent magnets contain rare‐earth elements. In the search for rare‐earth‐free alternates, body‐centered tetragonal Fe–Ni is notable. The ordering to form this phase from usual cubic close‐packed Fe‐Ni understood be possible only below a critical temperature, commonly accepted 593 K. first demonstrated by using neutron irradiation accelerate atomic diffusion. phase, designated as mineral tetrataenite, found in Fe‐based meteorites, its...
We report a colloidal synthesis of blue emissive, stable cube-shaped CsPbBr3 quantum dots (QDs) in the strong confinement regime via dissolution-recrystallization starting from pre-synthesized (KxCs1-x)4PbBr6 nanocrystals which are then reacted with PbBr2. This is markedly different known case Cs4PbBr6 that react within seconds PbBr2 and get transformed into much larger, green emitting nanocrystals. Here, instead, conversion to QDs occurs time span hours, tuning size achieved by adjusting...
We report the synthesis of nanocrystal heterostructures composed CsPbCl