A5015519451- Nanoparticle-Based Drug Delivery
- Ferroelectric and Piezoelectric Materials
- Advanced Sensor and Energy Harvesting Materials
- Magnetic properties of thin films
- Multiferroics and related materials
- Conducting polymers and applications
- Magnetic and transport properties of perovskites and related materials
- Magnetic Properties and Synthesis of Ferrites
- Iron oxide chemistry and applications
- Characterization and Applications of Magnetic Nanoparticles
- Electrospun Nanofibers in Biomedical Applications
- Electronic and Structural Properties of Oxides
- Metal and Thin Film Mechanics
- Advanced Condensed Matter Physics
- Theoretical and Computational Physics
- Semiconductor materials and devices
- Copper Interconnects and Reliability
- ZnO doping and properties
- Copper-based nanomaterials and applications
- Supramolecular Self-Assembly in Materials
- Advanced Photocatalysis Techniques
- Perovskite Materials and Applications
- TiO2 Photocatalysis and Solar Cells
- GaN-based semiconductor devices and materials
- Polydiacetylene-based materials and applications
University of Minho
2016-2025
University of Coimbra
2023
Energias de Portugal (Portugal)
2017-2020
Institute of Nanotechnology
2020
Clinical Academic Center of Braga
2015-2019
Sapienza University of Rome
2019
Institute for the Chemistry of OrganoMetallic Compounds
2019
Multidisciplinary Digital Publishing Institute (Switzerland)
2019
QuantaLab
2017-2018
Universidade do Porto
1993-1999
Aluminium-doped (3%) zinc oxide thin films (AZO) were prepared, using pulsed laser deposition, with varying deposition times. The target was fabricated from compacted aluminium-doped nano-powder produced by sol–gel. had a growth consisting of nanostructures in the form columns sharp ends which, for certain times, resemble nano-flowers or nano-leaves. small spheroid-like particles created during columnar act as seed other AZO needles, resulting appearance lotus-like flowers and even smaller...
Half-biased spin valves have been prepared by ion beam deposition. The magnetoresistance (MR) signal reaches 7.7% and the exchange field is 350 Oe with a coupling of 15 coercivity free layer equal to 4 Oe. [111] texture induced very thin Ta buffer (thickness <10 /spl Aring/) has strong effect in increasing MR field, while decreasing coercivity. blocking temperature MnIr-biased 250/spl deg/C thermal stability study shows that constant up 300/spl deg/C, under consecutive 5-h anneals at each...
Aqueous and dry magnetoliposomes containing NiFe<sub>2</sub>O<sub>4</sub>nanoparticles were prepared using a new method fusion with model membranes was demonstrated.
Aqueous and solid magnetoliposomes containing MnFe<sub>2</sub>O<sub>4</sub>nanoparticles were prepared evaluated as nanocarriers for a new antitumor drug.
Despite the promising pharmacological properties of curcumin, transport and effective release curcumin is still a challenge. The advances in functionalized nanocarriers for have also been motivated by anticancer activity this natural compound, aiming at targeted therapies. Here, stealth (aqueous solid) magnetoliposomes containing calcium-substituted magnesium ferrite nanoparticles, CaxMg1−xFe2O4 (with x = 0.25, 0.50, 0.75) were developed as curcumin. magnetic nanoparticles exhibit...
In recent decades, substantial progress has been made in embedding molecules, nanocrystals, and nanograins into nanofibers, resulting a new class of hybrid functional materials with exceptional physical properties. Among these materials, nanofibers exhibiting ferroelectric, piezoelectric, pyroelectric, multiferroic, nonlinear optical characteristics, have attracted considerable attention undergone improvements. This review critically examines developments, focusing on strategies for...
Electrospinning of an aqueous poly(vinyl alcohol) and glycine solution has been used to produce nanofibers with embedded crystalline exclusively in the form β polymorph. The β-glycine nanocrystals are highly oriented within polymer fibers present good polar properties. Piezoelectric nonlinear optical responses have quantitatively examined showing piezoelectric coefficient deff = 12.5 pm/V effective susceptibility two times greater than that potassium dihydrogen phosphate (KDP). Additionally,...
In-plane aligned nanofibers of organic 2-methyl-4-nitroaniline (MNA) were produced by the electrospinning technique using a 1:1 weight ratio with poly(l-lactic acid). The fibers are capable enormous efficient optical second harmonic generation as strong pure MNA crystals in powder form. Structural, spectroscopic, and polarimetry studies show that crystallizes within an orientation which aromatic rings predominantly orientated edge-on respect to plane fiber array their dipole moments axis....
Titanium oxide filled polyvinylpyrrolidone (PVP) composite nanofibers have been prepared via a simple electrospinning technique. The combination of good TiO 2 properties with its high surface area leads these into having vast applicability such as cosmetics, scaffolds for tissue engineering, catalytic devices, sensors, solar cells, and optoelectronic devices. structural chemical the samples studied. presence phase on was confirmed. An anatase to rutile transformation observed at 600°C....
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....
Abstract Tuberculosis (TB) is an infectious disease which affects millions of people worldwide. Inhalable polymeric dry powders are promising alternatives as anti‐TB drug carriers to the alveoli milieu and infected macrophages, with potential significantly improve therapeutics efficiency. Here, development a magnetically responsive microparticulate system for pulmonary delivery candidate (P3) reported. Microparticles (MPs) developed based on cast method using calcium carbonate sacrificial...
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%)....
Supramolecular plasmonic magnetogels comprising two different nanoparticle architectures were developed and evaluated as potential nanocarriers for multimodal cancer therapy with reversible photothermia capabilities tuneable drug release.
Dipeptide biomaterials are strong piezoelectric materials that can convert applied mechanical forces into electricity. We have developed large-scale hybrid electrospun arrays containing N-tert-butoxycarbonyl (Boc) diphenylalanine in the form of nanotubes embedded biocompatible polymers. These nanofibers exhibit properties when a periodic force is applied. The nanostructured were produced by electrospinning technique. Optical absorption measurements show four bands spectral region 240-280 nm...
Nanostructured dipeptide self-assemblies exhibiting quantum confinement are of great interest due to their potential applications in the field materials science as optoelectronic for energy harvesting devices. Cyclic dipeptides an emerging outstanding group ring-shaped dipeptides, which, because multiple interactions, self-assemble supramolecular structures with different morphologies showing and photoluminescence. Chiral cyclic may also display piezoelectricity pyroelectricity properties...
Bottom-pinned Mn83Ir17 spin valves with enhanced specular scattering were fabricated, showing magnetoresistance (MR) values up to 13.6%, lower sheet resistance R□ and higher ΔR□. Two nano-oxide layers (NOL) are grown on both sides of the CoFe/Cu/CoFe valve structure by natural oxidation or remote plasma starting CoFe layer. Maximum MR enhancement is obtained after just 1 min oxidation. Rutherford backscattering analysis shows that a 15±2 Å oxide layer grows at expense initial (prior...
Magnetoliposomes containing calcium ferrite (CaFe2O4) nanoparticles were developed and characterized for the first time. CaFe2O4 covered by a lipid bilayer or entrapped in liposomes forming, respectively, solid aqueous magnetoliposomes as nanocarriers new antitumor drugs. The magnetic UV/Visible absorption, XRD, HR-TEM, SQUID, exhibiting sizes of 5.2 ± 1.2 nm (from TEM) superparamagnetic behavior. DLS TEM. incorporation two potential drugs (thienopyridine derivatives) specifically active...
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.
Multifunctional lipid nanocarriers are a promising therapeutic approach for controlled drug release in cancer therapy. Combining the widely used liposome structure with magnetic nanoparticles magnetoliposomes allies, advantages of using liposomes include possibility to magnetically guide, selectively accumulate, and control drugs on target. The effectiveness these nanosystems is intrinsically related individual characteristics two main components—lipid formulation nanoparticles—and their...
We report excellent piezoelectric and pyroelectric properties of electrospun nanofibers based on the hybrid ferroelectric 1,4-diazabicyclo[2.2.2]octane perrhenate (dabcoHReO4). Ferroelectric nanoparticles are embedded into fibers being naturally aligned with major polarization component along fiber axis. A flexible nanogenerator consisting an array dabcoHReO4 provides a voltage above 100 mV under moderate strain level. The coefficient in as-electrospun mat is similar to that poled...
We report the synthesis, structural and ferroelectric characterization of continuous well-aligned nanofibres barium titanate produced by electrospinning technique. The fibres with average diameter 150–400 nm consist connected nanoparticles BaTiO3 stacked together to form shape a long filament. tetragonal phase in obtained was revealed x-ray diffraction Raman spectroscopy has been also confirmed second harmonic generation (SHG) piezoresponse force microscopy (PFM). temperature dependence SHG...
Nanostructured dipeptide self-assemblies exhibiting quantum confinement are of great interest due to their potential applications in the field materials science as optoelectronic for energy harvesting devices. Among those, aromatic cyclo-dipeptides containing amino acid tryptophan wide-band gap semiconductors displaying high mechanical rigidity, photoluminescence and piezoelectric properties be used power generation. In this work, we report fabrication hybrid systems based on chiral...