A5035601861- Characterization and Applications of Magnetic Nanoparticles
- Magnetic Properties and Synthesis of Ferrites
- Iron oxide chemistry and applications
- Magnetic properties of thin films
- Nanoparticle-Based Drug Delivery
- Diamond and Carbon-based Materials Research
- Laser-Ablation Synthesis of Nanoparticles
- Polyoxometalates: Synthesis and Applications
- Magnetism in coordination complexes
- Lanthanide and Transition Metal Complexes
- Advanced Materials Characterization Techniques
- Polymer Nanocomposites and Properties
- Polymer crystallization and properties
- Solid State Laser Technologies
- Catalysis and Oxidation Reactions
- Luminescence Properties of Advanced Materials
- Semiconductor materials and devices
- Gold and Silver Nanoparticles Synthesis and Applications
- Semiconductor materials and interfaces
- X-ray Diffraction in Crystallography
- Theoretical and Computational Physics
- Social Sciences and Policies
- Quasicrystal Structures and Properties
- Glass properties and applications
- Social and Economic Solidarity
Universidade Estadual de Campinas (UNICAMP)
2022-2025
Hospital de Clínicas da Unicamp
2025
Universidad Nacional de La Matanza
2014-2023
Bariloche Atomic Centre
2018-2020
Consejo Nacional de Investigaciones Científicas y Técnicas
2019-2020
Universidade Federal Fluminense
2017-2019
Institut Català de Nanociència i Nanotecnologia
2018
Institut de Nanociència i Nanotecnologia de la Universitat de Barcelona
2018
Centro Científico Tecnológico - Tucumán
2018
University of Bayreuth
2011
The dominant magnetic relaxation mechanism can be controlled by changing the effective anisotropy in core/shell nanoparticles, preserving its saturation, size and morphology for hyperthermia experiments.
Magnetic effects caused by dipolar interactions in single-domain magnetic ensembles at finite temperatures are described. A modified superparamagnetic approach based on the mean field theory and random anisotropy model has been developed to describe magnetization curves of nanoparticle assemblies. The was used fit experimental zero-field-cooled field-cooled Fe3O4 nanoparticles embedded paraffin. fitting parameters were structural properties materials strength between nanoparticles. provides...
Size-controlled Fe 3 O 4 clusters show enhanced dipolar interactions, impacting magnetic properties. A model reveals fields, energy barriers, and relaxation dynamics, supporting biomedical other advanced applications.
In this work it is shown a precise way to optimize the heat generation in high viscosity magnetic colloids, by adjusting Néel relaxation time core/shell bimagnetic nanoparticles, for Magnetic Fluid Hyperthermia applications. To pursue goal, Fe3O4/ZnxCo1-xFe2O4 nanoparticles were synthesized with 8.5 nm mean core diameter, encapsulated shell of ~1.1 thickness, where Zn atomic ratio (Zn/(Zn+Co) at%) changes from 33 at% 68 at%. The measurements are consistent rigid interface coupling between...
In this work, we investigated the effects of postdeposition heat treatment on structural and magnetic properties CoFe2O4 nanoparticles produced by pulsed laser deposition. Structural analysis X-ray diffraction, transmission electron microscopy (TEM) Mössbauer spectroscopy indicate formation a single phase cobalt ferrite with size ranging from 4.3 to 33.3 nm depending annealing temperature. The samples were in wide temperature range (50–400 K). Noticeable cubic magnetocrystalline anisotropy...
We report the precise control of tunneling magnetoresistance (TMR) in devices self-assembled core/shell Fe$_3$O$_4$/Co$_{1-x}$Zn$_x$Fe$_2$O$_4$ nanoparticles ($0\leq x\leq 1$). Adjusting magnetic anisotropy through content Co$^{2+}$ shell, provides an accurate tool to switching field between bistable states TMR. In this way, different combinations soft/hard and hard/soft configurations can be envisaged for optimizing with required magnetotransport response.
Abstract The search for new metal‐organic compounds as candidates quantum information processing technologies is in the spotlight. Several metal ions and organic linkers have been used to obtain such compounds. Herein, we describe synthesis, crystal structures, cryomagnetic properties of two air‐stable isostructural neodymium(III) europium(III) one‐dimensional (1D) coordination polymers formula [Nd(Hmpa) 3 (DMSO) 2 ] n ( 1 ) [Eu(Hmpa) [Hmpa= N ‐(4‐methylphenyl)oxamate,...
In magnetic tunnel junctions based on iron oxide nanoparticles the disorder and oxidation state of surface spin as well functionalization play a crucial role in magnetotransport properties. this work, we report systematic study effects vacuum annealing structural, transport properties self-assembled ∼10 nm Fe3O4nanoparticles. The high temperature treatment (from 573 to 873 K) decomposes organic coating into amorphous carbon, reducing electrical resistivity assemblies by 4 orders magnitude....
${\mathrm{NaYF}}_{4}$ nanoparticles (NPs) form in two crystal structures, cubic ($\ensuremath{\alpha}$-phase) and hexagonal ($\ensuremath{\beta}$-phase), each one presenting a different electric field (CEF) Stark effect, that affects the upconversion (UC) light emission of NPs when doped with rare-earth elements. Therefore, knowledge CEF parameters, wave functions, energy levels rare earth (RE) $J$-multiplet is expected to be great help for understanding improvement UC emission. In this...
It is not easy to differentiate “task” and “work” from the perspective of Pichon-Rivière’s conceptual framework, because both concepts have a fundamental place within his theory. The task march group or one subject towards their goal; it praxis trajectory that can be characterized as multidimensional dialectical. work, like task, an activity organizes individual collective subjectivities, but there are important differences between them. pre-task form subjectivity (thinking, feeling acting)...
Niobium carbide (NbC) is a high-field Type II superconductor with critical temperature ($T_C$) of 11.1 K, just above that pure Nb ($T_C = 9$ K). Downsizing NbC to the nanoparticle scale introduces significant alterations in its field and/or superconducting temperature. Here we report on nanoparticles $T_C \approx$ 10 K synthesized by laser ablation acetone, using lens-target distance (laser fluence) and centrifugation as control parameters particle size. X-ray diffraction analyses certified...
Niobium carbide (NbC) is a high-field type II superconductor with critical temperature (
Mn5Si3nanowires are believed to be the building blocks of newest trends flexible and stretchable devices in nanoelectronics. In this context , growing Mn5Si3nanowires, as well characterizing their electronic transport properties provide insight into phenomenology. work, we report on growth mechanism produced by metallic flux nanonucleation method, resistivity measurements these nanostructures. Our calculation allows us, using Washburn equation for pore infiltration, give a guess why obtain...
In this work, we report a fundamental study on the exchange interaction between localized rare earth magnetic moments and conduction electrons of Er3+ diluted in Au metallic nanoparticles (NPs) produced by laser ablation liquid. The was carried out Au1−xErx (x ≤ 0.026) bulk alloys NPs with mean size 20 nm. samples were characterized means x-ray diffraction, transmission electron microscopy, susceptibility, spin resonance (ESR) experiments. obtained results showed that, despite high...