A5021308810- Magnetic properties of thin films
- Metallic Glasses and Amorphous Alloys
- Electrodeposition and Electroless Coatings
- Magnetic Properties and Applications
- Metal and Thin Film Mechanics
- Nanoporous metals and alloys
- ZnO doping and properties
- Advanced Memory and Neural Computing
- Electrocatalysts for Energy Conversion
- Theoretical and Computational Physics
- Multiferroics and related materials
- Characterization and Applications of Magnetic Nanoparticles
- Magnetic and transport properties of perovskites and related materials
- Microstructure and mechanical properties
- Advanced materials and composites
- Anodic Oxide Films and Nanostructures
- Magnetic Properties and Synthesis of Ferrites
- X-ray Diffraction in Crystallography
- Micro and Nano Robotics
- High Entropy Alloys Studies
- Magnetic Properties of Alloys
- Aluminum Alloys Composites Properties
- Electric Motor Design and Analysis
- Crystallization and Solubility Studies
- Physics of Superconductivity and Magnetism
Universitat Autònoma de Barcelona
2016-2025
Institució Catalana de Recerca i Estudis Avançats
2016-2025
Conference Board
2023-2024
Institute of Electrical and Electronics Engineers
2020-2024
Antea Group (France)
2023-2024
Alpha Omega Electromagnetics (United States)
2020-2023
Artifex University
2021
Gorgias Press (United States)
2019-2021
Micro Magnetics (United States)
2019-2021
Centre for Research on Ecology and Forestry Applications
2020
Highlights•Use of photocatalytic and ferroelectric BiFeO3 nanosheets nanowires•Harnessing solar energy mechanical vibrations for organic pollutant removal•Elevated performance under stress was attributed to the piezotronic effect•Hydroxyl radicals holes were dominant species degradation organicsSummaryDesigning new catalysts that can efficiently utilize multiple sources contribute solving current challenges environmental remediation increasing demands. In this work, we fabricated...
The magnetization reversal in exchange-biased ferromagnetic-antiferromagnetic (FM-AFM) bilayers is investigated. Different pathways on each branch of the hysteresis loop, i.e., asymmetry, are obtained both experimentally and theoretically when magnetic field applied at certain angles from anisotropy direction. range magnitude this asymmetry determined by ratio between FM interfacial FM-AFM exchange anisotropy. occurrence linked with appearance irreversibility, finite coercivity, as well...
Core−shell nanoparticles of MnO|Mn3O4 with average particle sizes 5−60 nm, composed an antiferromagnetic (AFM) core and a ferrimagnetic (FiM) shell, have been synthesized their magnetic properties investigated. The core−shell structure has generated by the passivation MnO cores, yielding inverted AFM-core|FiM-shell system, as opposed to typical FM-core|AFM-shell. exchange-coupling between AFM FiM gives rise enhanced coercivity ∼8 kOe loop shift ∼2 at 10 K, i.e., exchange bias. show...
The magnetic properties of ferromagnetic-antiferromagnetic Co-CoO core-shell nanoparticles are investigated as a function the in-plane coverage density from 3.5% to 15%. superparamagnetic blocking temperature, coercivity, and bias field radically increase with increasing coverage. This behavior cannot be attributed overall interactions between cores. Rather, it can semiquantitatively understood by assuming that shells isolated have strongly degraded properties, which rapidly recovered come...
Conventional photocatalytic micromotors are limited to the use of specific wavelengths light due their narrow absorption spectrum, which limits effectiveness for applications in biomedicine and environmental remediation. We present a multiwavelength light-responsive Janus micromotor consisting black TiO2 microsphere asymmetrically coated with thin Au layer. The microspheres exhibit ranges between 300 800 nm. propelled by light, both H2O2 solutions pure H2O over broad range including UV,...
The crystal and magnetic structures of orthorhombic ε-Fe2O3 have been studied by simultaneous Rietveld refinement X-ray neutron powder-diffraction data in combination with Mössbauer spectroscopy, as well magnetization heat-capacity measurements. It has found that above 150 K, the polymorph is a collinear ferrimagnet moments directed along axis, whereas ordering below 80 K characterized square-wave incommensurate structure. transformation between these two states second-order phase transition...
The effect of dynamic shape switching hydrogel bilayers on the performance self-folding microrobots is investigated for navigation in body orifices and drug release demand. Tubular are fabricated by coupling a thermoresponsive nanocomposite with poly(ethylene glycol)diacrylate (PEGDA) layer, to achieve spontaneous reversible folding from planar rectangular structure. Graphene oxide (GO) or silica-coated superparamagnetic iron nanoparticles dispersed matrix provide near-infrared (NIR) light...
Hybrid helical magnetic microrobots are achieved by sequential electrodeposition of a CoNi alloy and PPy inside photoresist template patterned 3D laser lithography. A controlled actuation the rotating field is demonstrated in fluidic environment. The development micro- nanoelectromechanical systems (MEMS/NEMS) technology has resulted fabrication nanomachines that can be wirelessly liquid environments. Among various control strategies for these machines, manipulation emerged as most versatile...
Microrobots and metal-organic frameworks (MOFs) have been identified as promising carriers for drug delivery applications. While clinical applications of microrobots are limited by their low loading efficiencies the poor degradability materials used fabrication, MOFs lack motility targeted capabilities. The combination these two fields marks beginning a new era; MOF-based small-scale robots (MOFBOTs) biomedical Yet, biodegradability is major hurdle in field micro- nanoswimmers including...
Hybrid microstructures consisting of a CoNi segment for wireless magnetic manipulation coupled to Bi<sub>2</sub>O<sub>3</sub>/BiOCl are utilized water remediation.
Abstract The last decade has seen the rapid development of untethered mobile micro‐ and nanorobots able to navigate liquids by means external power sources or harvesting chemicals from their surrounding media. These tiny devices hold great promise for applications in biomedical field including targeted drug delivery, localized diagnostics, microsurgery, cell stimulation. However, translate small‐scale robots laboratory clinic, many challenges remain. A major obstacle is lack imaging...
Homogeneously mesoporous Ni–Pt thin films have been successfully synthesized by potentiostatic electrodeposition from an aqueous solution. The are single-phase nanocrystalline fcc solid solution and their composition can be adjusted with the deposition potential to a Ni content within 60-100 at%. mesoporosity is constantly present, independent of or microstructure, homogeneously distributed in all dimensions pore diameter order 10 nm. Film thickness uniform range 200–300 show improved...
Manipulation of the magnetic behavior materials with voltage (i.e., magnetoelectric actuation) has become a topic intense research during last years. Apart from its obvious interest basic science standpoint, control and eventual switching magnetization without applying any external field (or spin polarized current) potential to drastically reduce power consumption devices due lack minimization) Joule heating dissipation effects. Herein, an overview state-of-the-art electrolyte-gated...
The possibility of tuning the magnetic properties materials with voltage (converse magnetoelectricity) or generating electric fields (direct has opened new avenues in a large variety technological fields, ranging from information technologies to healthcare devices and including great number multifunctional integrated systems, such as mechanical antennas, magnetometers, radio frequency (RF) tunable inductors, which have been realized due strong strain-mediated magnetoelectric (ME) coupling...
The hysteresis loop shift in sub-100 nm ferromagnetic- (FM-)antiferromagnetic (AFM) nanostructures can be either enhanced or reduced with respect to continuous films the same composition, varying AFM layer thickness. An enhancement of coercivity and a reduction blocking temperature are also observed. These effects mainly ascribed physical limitations that dot sizes impose on domain size concomitant weakening pinning strength exerted by during magnetization reversal FM.
ε-Fe2O3 nanoparticles embedded in a SiO2 matrix have been synthesized by sol−gel chemistry and high temperature heat treatments. Virtually pure (in excess of 93%) is obtained, although two-phase mixture, + α-Fe2O3, observed for Fe2O3/SiO2 ratios greater than 37 wt %. The are stable up to ∼1600 K. Optimized ferrimagnetic, with Curie TC ≈ 510 K, remarkably values room-temperature coercivity, HC = 20 kOe.
In [Pt/Co] multilayers (ML) exchange coupled to IrMn, the magnitudes of bias field ${H}_{E}$ and coercivity ${H}_{C}$ measured along perpendicular film direction, can be tailored by (i) varying thickness Co layers $({t}_{\mathrm{Co}})$ inside ML and/or (ii) inserting a Pt spacer between antiferromagnetic (AFM) layer. An unusual peak in ferromagnetic (FM) dependence properties is observed. This ascribed reduction effective magnetic anisotropy for either very small or too large values...
Exchange bias, referred to the interaction between a ferromagnet (FM) and an antiferromagnet (AFM), is fundamental interfacial magnetic phenomenon, which key current future applications. The effect was discovered half century ago, it well established that spin structures at FM/AFM interface play essential role. However, currently, ad hoc phenomenological anisotropies are often postulated without microscopic justification or sufficient experimental evidence address magnetization-reversal...