A5062456262- Magnetic and transport properties of perovskites and related materials
- Advanced Thermoelectric Materials and Devices
- Shape Memory Alloy Transformations
- Advanced Sensor and Energy Harvesting Materials
- Nanoparticle-Based Drug Delivery
- Thermal Radiation and Cooling Technologies
- Ferroelectric and Piezoelectric Materials
- Advanced Condensed Matter Physics
- Rare-earth and actinide compounds
- Advanced Thermodynamics and Statistical Mechanics
- Multiferroics and related materials
- Gold and Silver Nanoparticles Synthesis and Applications
- Magnetic Properties and Synthesis of Ferrites
- Supercapacitor Materials and Fabrication
- Characterization and Applications of Magnetic Nanoparticles
- Thermal Expansion and Ionic Conductivity
- Gas Sensing Nanomaterials and Sensors
- Nanomaterials for catalytic reactions
- Copper-based nanomaterials and applications
- Graphene and Nanomaterials Applications
- Phase Change Materials Research
- Graphene research and applications
- Transition Metal Oxide Nanomaterials
- Topological Materials and Phenomena
- Iron oxide chemistry and applications
Universidade do Porto
2015-2024
University of Minho
2022
Faculdade de Tecnologia e Ciências
2021
Instituto de Física del Sur
2021
Istituto di Fotonica e Nanotecnologie
2021
Sapienza University of Rome
2019
Institute for the Chemistry of OrganoMetallic Compounds
2019
Multidisciplinary Digital Publishing Institute (Switzerland)
2019
University of Lisbon
2014-2017
Fundação Oswaldo Cruz
2003-2007
Abstract
Late diagnosis and systemic toxicity associated with conventional treatments make oncological therapy significantly difficult. In this context, nanomedicine emerges as a new approach in the prevention, treatment of cancer. work, pH-sensitive solid magnetoliposomes (SMLs) were developed for controlled release chemotherapeutic drug doxorubicin (DOX). Shape anisotropic magnetic nanoparticles magnesium ferrite partial substitution by calcium (Mg0.75Ca0.25Fe2O4) synthesized, without calcination,...
Inorganic–polymer composites have become promising materials to be processed by printing technologies because of their unique properties that allow the fabrication flexible wearable electronics at reduced manufacturing costs. In present work, a complete methodological process assembling microthermoelectric generator based on inorganic−polymer is presented. The used microparticles were prepared top-down approach beginning with previously material solid-state reaction and later scaled down...
A flexible and ultralight planar thermoelectric generator based on 15 thermocouples composed of n-type bismuth telluride (Bi2Te3) p-type antimony (Sb2Te3) legs (each with 400 nm thick) connected in series, 25 μm thick Kapton substrate, was fabricated impressive power factor values 2.7 0.8 mW K–2 m–1 (at 298 K) for Bi2Te3 Sb2Te3 films, respectively. The p–n junction device can generate a maximum open-circuit voltage output 210 mV 0.7 μW (3.3 cm–2), respectively, temperature difference 35 K,...
Abstract Developing new energy generation technologies able to effectively convert low‐grade thermal into electricity is an urgent necessity tackle the continuous surge in demand and mitigate climate change. Here, a hybrid device that couples triboelectric thermomagnetic effects generate electrical power presence of small temperature gradients near room demonstrated. The effect allows induce periodic sustained motion second‐order ferromagnetic material below 30 °C. This mechanical then...
ABSTRACT The maintenance of a benign chronic Toxoplasma gondii infection is mainly dependent on the persistent presence gamma interferon (IFN-γ) in central nervous system (CNS). However, IFN-γ-activated microglia are paradoxically involved parasitism control and tissue damage during broad range CNS pathologies. In this way, nitric oxide (NO), main toxic metabolite produced by microglia, may cause neuronal injury T. infection. Despite potential NO toxicity, neurodegeneration not common...
Microparticles of corn starch and chitosan crosslinked with glutaraldehyde, produced by the solvent exchange technique, are studied as reinforcement fillers for thermoplastic plasticized glycerol. The presence 10% w/w in microparticles is shown to be essential guaranteeing effective crosslinking, demonstrated water solubility assays. Crosslinked forms an interpenetrating polymer network chains, producing a very low solubility. thermal stability agreement their polysaccharide composition. An...
High aspect ratio La0.7Sr0.3MnO3 nanotube (NT) arrays have been synthesized using nitrates based sol-gel precursor by nanoporous anodized aluminum oxide template assisted method. Their phase purity and microstructures were analyzed X-ray diffraction, scanning electron microscopy, energy-dispersive x-ray spectroscopy. Magnetocaloric effect (MCE) of as prepared NTs was investigated means field dependence magnetization measurements. Significant magnetic entropy change, −△SM = 1.6 J/kg K, the...
Multifunctional liposomes containing manganese ferrite/gold core/shell nanoparticles were developed. These magnetic/plasmonic covered by a lipid bilayer or entrapped in liposomes, which form solid aqueous magnetoliposomes as nanocarriers for simultaneous chemotherapy and phototherapy. The characterized UV/Visible absorption, X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM), Superconducting Quantum Interference Device (SQUID). Dynamic Light Scattering (DLS) TEM....
Magnesium ferrite nanoparticles, with diameters around 25 nm, were synthesized by coprecipitation method. The magnetic properties indicate a superparamagnetic behaviour, maximum magnetization of 16.2 emu g −1 , coercive field 22.1 Oe and blocking temperature 183.2 K. These MgFe 2 O 4 nanoparticles used to produce aqueous solid magnetoliposomes, sizes below 130 nm. potential drug curcumin was successfully incorporated in these nanosystems, high encapsulation efficiencies (above 89%)....
Graphene-based materials (GBMs) have been increasingly explored for biomedical applications. However, interaction between GBMs-integrating surfaces and bacteria, mammalian cells, blood components, that is, the major biological systems in our body, is still poorly understood. In this study, we systematically explore features of GBMs most strongly impact interactions films with plasma proteins systems. Films produced by vacuum filtration different oxidation degree thickness depict surface...
Abstract A Ru supported on a magnetically separable chitosan‐based nanomaterial (Mn@CS@Ru) was prepared by wet impregnation based ionic gelation using sodium tripolyphosphate as cross‐linking agent. The of chitosan leads to supporting matrix promote the embedding manganese(II) ferrite and nanoparticles (NPs) electrostatic interactions. effects formulation method parameters fabrication process were investigated, resulting as‐prepared Mn@CS@Ru nanocatalyst characterized. catalytic activity...
Incorporation of oxidized graphene improves pHEMA's mechanical properties enabling its application as bulk material in the design blood-contacting devices. These composites keep biological properties, preventing thrombosis and infection.
Magnetoliposomes containing MnFe<sub>2</sub>O<sub>4</sub>nanoparticles were used as nanocarriers for new potent antitumor thieno[3,2-<italic>b</italic>]pyridin-7-arylamines, inhibiting the growth of human tumor cells.
In this work the thermal expansion of $\mathrm{G}{\mathrm{d}}_{5}\mathrm{S}{\mathrm{i}}_{1.3}\mathrm{G}{\mathrm{e}}_{2.7}$ magnetic nanogranules was studied. A crossover from positive (macro- and microscale in literature) towards a negative (at nanoscale) is observed. The (NTE) behavior found two temperature windows: 90--160 K...
Macrophage migration inhibitory factor (MIF) is increased in asthmatic patients and plays a critical role the pathogenesis of asthma. We show here that mice lacking MIF failed to develop airway hyper-responsiveness (AHR), tissue eosinophilia, mucus metaplasia. Analysis bronchoalveolar fluids revealed substantial reduction IL-13, eotaxin cysteinyl-leukotrienes. The lack these cardinal features asthma MIF(-/-) occurs regardless high concentrations IL-4 lung OVA-specific IgE serum....
Abstract The coupling between electric, magnetic and elastic features in multiferroic materials is an emerging field science, with important applications on alternative solid-state cooling technologies, energy harvesting sensors/actuators. In this direction, we developed a thorough investigation of composite, comprising magnetocaloric/magnetostrictive Gd $${}_{5}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mrow/> <mml:mrow> <mml:mn>5</mml:mn> </mml:mrow>...
Water pollution is a major environmental challenge. Due to the inefficiency of conventional wastewater treatment plants in degrading many organic complex compounds, these recalcitrant pollutants end up rivers, lakes, oceans and other bodies water, affecting environment human health. Semiconductor photocatalysis considered an efficient complement methods, use various nanomaterials for this purpose has been widely explored, with particular focus on improving their activity under visible light....
Here, the ability of using p-type tin oxide (SnO x ) thin films as a thermal sensor has been investigated. Firstly, thermoelectric performance was optimized by controlling thickness SnO film from 60 up to 160 nm. A high Seebeck coefficient +263 μV K-1 and electrical conductivity 4.1 × 102 (S m-1) were achieved in nm thick film, due compact nanostructured absence Sn metallic phase, which observed for thicker leading typical transport properties n-type film. Moreover, x-ray photoelectron...
The worldwide energy scarcity arising from the massive consumption of nonrenewable sources raised a global awareness need for cleaner and affordable solutions to mitigate climate change ensure world sustainable development. rise Internet Things fast growth groundbreaking market wearable electronics boosted major quest self-powered technologies merging harvesting storage functionalities meet demands myriad segments, such as healthcare, transportation, defense sports. Thermoelectric devices...
The generation of efficient self-powered energy harvesting/storage technologies is a milestone demand to the field Internet Things. In this work, an interdigital planar all-in-one thermally chargeable supercapacitor (IPTS) was successfully produced by merging harvesting and storage technologies. smart device through photolithography process, combining carbon nanotubes as electrode material with polyvinyl alcohol (PVA) doped H3PO4 solid–gel polyelectrolyte. ionic conductivity PVA tuned...