A5024401527- Characterization and Applications of Magnetic Nanoparticles
- Physics of Superconductivity and Magnetism
- Nanoparticle-Based Drug Delivery
- Superconducting Materials and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Microfluidic and Bio-sensing Technologies
- Magnetism in coordination complexes
- Magnetic and transport properties of perovskites and related materials
- Magnetic properties of thin films
- Iron oxide chemistry and applications
- Lanthanide and Transition Metal Complexes
- Organic and Molecular Conductors Research
- Thermal properties of materials
- Nuclear Physics and Applications
- Geomagnetism and Paleomagnetism Studies
- nanoparticles nucleation surface interactions
- Advanced MRI Techniques and Applications
- Advanced NMR Techniques and Applications
- Quantum and electron transport phenomena
- Heat Transfer and Optimization
- High-pressure geophysics and materials
- Diamond and Carbon-based Materials Research
- Crystallography and molecular interactions
- Thermal Expansion and Ionic Conductivity
Universidad de Zaragoza
2015-2024
Instituto de Nanociencia y Materiales de Aragón
2014-2024
Zaragoza Logistics Center
2017-2019
Park Plaza Hospital
2019
University of Illinois Chicago
2016
Consejo Superior de Investigaciones Científicas
2006-2012
Centre National de la Recherche Scientifique
2004-2007
Université de Bordeaux
2004-2007
Institut de Chimie de la Matière Condensée de Bordeaux
2004
We show both experimental evidences and Monte Carlo modeling of the effects interparticle dipolar interactions on hysteresis losses. Results indicate that an increase in intensity produce a decrease magnetic susceptibility losses, thus diminishing hyperthermia output. These findings may have important clinical implications for cancer treatment.
The specific absorption rate (SAR) of a maghemite-based ferrofluid, measured at 315 K, 3 kA/m, and 109 kHz, was found to double as the ferrofluid concentration decreased by factor 4. contained nonagglomerated, highly crystalline, monodisperse nanoparticles with an average size 11.6 nm initial 8.14 mg/mL. magnetic characterization three different concentrations this revealed several effects typical presence interactions, such decrease susceptibility values (liquid ferrofluid) Néel relaxation...
Abstract Molecular spin qubits have been shown to reach sufficiently long quantum coherence times envision their use as hardware in processors. These will however require implementation hybrid solid‐state devices for which the controlled localization and homogeneous orientation of molecular be necessary. An alternative isolated molecules that can ensure these key aspects is 2D framework qubit would act node. In this work, it demonstrated metalloporphyrin [Cu(H 4 TCPP)] molecule a potential...
One current challenge of magnetic hyperthermia is achieving therapeutic effects with a minimal amount nanoparticles, for which improved heating abilities are continuously pursued. However, it demonstrated here that the performance magnetite nanocubes in colloidal solution reduced by 84% when they densely packed three-dimensional arrangements similar to those found cell vesicles after nanoparticle internalization. This result highlights essential role played arrangement performance,...
2D vanadyl porphyrin layers are shown to possess superior spin coherence and purvey an optimal interface with superconducting circuits.
Purpose The localized heating of magnetic nanoparticles (MNPs) via the application time-varying fields – a process known as field hyperthermia (MFH) can greatly enhance existing options for cancer treatment; but broad clinical uptake its optimization, reproducibility and safety must be comprehensively proven. As part this effort, quantification MNP characterized by specific loss power (SLP), measured in W/g, or intrinsic (ILP), Hm2/kg is frequently reported. However, SLP/ILP measurements to...
Accurate measurements of the specific absorption rate (SAR) solids and fluids were obtained by a calorimetric method, using special-purpose setup working under adiabatic conditions. Unlike in current nonadiabatic setups, weak heat exchange with surroundings allowed straightforward determination temperature increments, avoiding usual initial-time approximations. The performed on commercial magnetite aqueous ferrofluid revealed good reproducibility (4%). Also, copper sample comparison between...
The heating and self-regulating abilities of La1−xSrxMnO3+Δ ferromagnetic nanoparticles for magnetic fluid hyperthermia are studied. samples, synthesized by the Glycine Nitrate Process, present non-agglomerated particles but partially constituted polycrystalline nanoparticles, displaying average crystallite diameters ranging from 21 to 31 nm. strontium content these between 0.14 0.39, is associated with non-stoichiometry effects in materials, both govern their Curie temperatures (TC), which...
Nanoparticles of the compound [Fe(Htrz)<sub>2</sub>trz]BF<sub>4</sub> are shown to have a rod shape. Their size is found control width thermal hysteresis displayed in spin crossover this material, while removal surfactant results systematically reduction width, by up 16 K, both effects being original and important for potential applications.
Determining the low-temperature dependence of specific absorption rate (SAR) magnetic nanoparticles under alternating fields with amplitudes and frequencies similar to those used in applications such as fluid hyperthermia, becomes essential when theoretical expressions fail extrapolate behavior nanoparticle arrangements. We prove that adiabatic magnetothermia is capable providing SAR(T) data displaying an excellent continuity obtained from measurements at lower ac-field frequencies.
The heating ability of magnetic nanoparticles (MNPs) intended for hyperthermia is quantified by means the specific absorption rate (SAR), also referred to as loss power. This quantification mainly performed on ferrofluids, even though SAR values so obtained are often not representative nanoparticle performance inside tissues (solid matrices). In this study, cobalt ferrite MNPs with mean crystallite diameters 5.5 nm and 7.4 nm, functionalized or not, dispersed in liquid solid media, was...
A strategy toward the realization of a quantum spin processor involves coupling qubits and qudits to photons within superconducting resonators. To enable such hybrid architecture, here we first explore design chip with multiple lumped-element LC resonators optimized for their distinct transitions vanadyl porphyrin electronuclear qudit. The controlled integration qudit onto device, both in terms number orientation, is then attained using situ formation nanosheets 2D framework built on as...
The formation, morphology, and structure of two-dimensional Langmuir-Blodgett (LB) assemblies octadecyltriazole (ODT)-based metal-containing oligomers presenting, in the case iron, spin-crossover phenomenon is studied with Brewster angle microscopy, IR dichroism, X-ray diffraction, atomic force microscopy. Two processes occurring at air-water interface are confirmed to dominate mechanism formation these LB films, instability coordination polymers recoordination metal ions subphase during...
Porous material is a critical component in the loop heat pipe (LHP) device, efficiency of which depends on thermal conductivity wick and its capillary capacity. A new bilayer based ceramic carbon nanotubes outer surface has been designed. The pressure LHP prototype have modified by growing multiwalled (MWCNTs). presence thin layer MWCNTs increased specimens between 18.87 26.42% for temperatures ranging from −50 to 50 °C. grown calculated considering mean thickness 5 μm was 59 W/mK. effective...
The first tetrahaloferrate spin crossover compound, [Fe(Metz)6](FeBr4)2 (Metz = 1-methyltetrazole), is reported. FeBr4− ions form ferromagnetically coupled 1D stacks and exhibit an antiferromagnetic order at 2.2 K, which coexists with the gradual centred 165 K.
Films of gadolinium formate are grown on oxide-free Si with carboxylic-acid terminated monolayers. A single adiabatic demagnetization the films has refrigeration potential to cool a 2 μm membrane from 5 below 1 K, making reported approach an alternative for local cryogenic cooling.
Abstract Fe II (Metz) 6 ](Fe III Br 4 ) 2 (Metz=1‐methyltetrazole) is one of the rare systems combining spin‐crossover and long‐range magnetic ordering. A joint neutron X‐ray diffraction magnetometry study allows determining its collinear antiferromagnetic structure, shows an increase Néel temperature from 2.4 K at ambient pressure, to 3.9 0.95 GPa. Applied pressure also enables a full high‐spin low‐spin switch temperature.
It is shown that akagan\'eite $\ensuremath{\beta}$-FeOOH provides a good model material to experimentally investigate thermoinduced magnetic moments in antiferromagnetic nanoparticles. We characterize the properties, exchange field, anisotropy and susceptibility of bulk akagan\'eite. In nanoparticles, we find drastic enhancement susceptibility, phenomenon first predicted by N\'eel. Also, nanoparticles possess moment.