A5073750266- Multiferroics and related materials
- Ferroelectric and Piezoelectric Materials
- Magnetic Properties and Synthesis of Ferrites
- Magnetic and transport properties of perovskites and related materials
- Dielectric properties of ceramics
- Advanced Condensed Matter Physics
- Nanoparticle-Based Drug Delivery
- Iron oxide chemistry and applications
- Microwave Dielectric Ceramics Synthesis
- Nanoparticles: synthesis and applications
- Metallic Glasses and Amorphous Alloys
- Characterization and Applications of Magnetic Nanoparticles
- Magneto-Optical Properties and Applications
- Graphene and Nanomaterials Applications
- Bone Tissue Engineering Materials
- Underwater Acoustics Research
- X-ray Diffraction in Crystallography
- Luminescence Properties of Advanced Materials
- Advanced materials and composites
- Electromagnetic wave absorption materials
- Nuclear materials and radiation effects
- Acoustic Wave Resonator Technologies
- Microbial Inactivation Methods
- Transition Metal Oxide Nanomaterials
- Dielectric materials and actuators
Universidade Estadual de Maringá
2015-2024
Universidade Estadual do Centro-Oeste
2006-2016
The University of Texas at San Antonio
2013-2016
Universidade Tecnológica Federal do Paraná
2015
Wayne State University
2013
University of Connecticut
2013
Cancer is one of the most common diseases nowadays and derives from uncontrollable growth a single cell. Magnetic nanoparticles (NpMag) offer various possibilities for use in biomedical area, including drug delivery mediated by magnetic fields. In current study, we evaluated vitro effects iron-oxide conjugated with antitumor doxorubicin (Dox) on human breast cancer cells. Our results revealed that Dox (NpMag+Dox) induce cellular redox imbalance MCF-7 We also demonstrate functionalized...
Superparamagnetic iron oxide nanoparticles (SPIONs) have great potential for biomedical applications as multipurpose magnetic resonance imaging (MRI) contrast agents, and some systems already been approved by The United States Food Drug Administration clinical use. behavior, high saturation, fast synthesis are the major advantages of these nanomaterials. Polymer coatings often used to prevent cluster formation improve biocompatibility nanoparticles. In this work, we propose use chitosan (CS)...
In this paper structural, electric, magnetic, and Mössbauer spectroscopy studies were conducted in (x)BiFeO3–(1-x)BaTiO3, 0.9 ≥ x 0.3, solid solutions. X-ray diffraction Rietveld refinement indicated the formation of single-phased materials crystallized a distorted perovskite structure with coexistence rhombohedral monoclinic symmetries. Room temperature ferroelectric hysteresis loops showed that electric polarization increases increase BaTiO3 content due to singular structural evolution...
Abstract A magnetically controlled elastically driven electroporation phenomenon, or magneto-elasto-electroporation (MEEP), is discovered while studying the interactions between core-shell magnetoelectric nanoparticles (CSMEN) and biological cells in presence of an a.c. magnetic field. In this paper we report effect MEEP observed via a series in-vitro experiments using core (CoFe 2 O 4 )-shell (BaTiO 3 ) structured human epithelial (HEP2). The cell phenomenon its correlation with field...
In this paper, the relationship between ferroic states and physicochemical mechanism which governs (Bi/Pb/La)–O bonds in polycrystalline La doped (0.6)BiFeO3–(0.4)PbTiO3 compounds were investigated. An abrupt change symmetries of perovskite-structured samples, from tetragonal (P4mm) to rhombohedral (R3c), occurs with increase concentration, highlighting diminishment hybridization (Bi/Pb)–O when is added into solid solution, emergence a characteristic morphotropic phase boundary tuned by...
Biomaterials that effectively act in biological systems, as treatment and healing of damaged or lost tissues, must be able to mimic the properties body's natural tissues its various aspects (chemical, physical, mechanical surface). These characteristics influence cell adhesion proliferation are crucial for success which a biomaterial will required. In this context, electrospinning process has gained prominence obtaining fibers micro- nanometric sizes from polymeric solutions aiming produce...
Chemically synthesized magnetite and poly(thiophene)-coated nanoparticles the correlations between their magnetic, structural, microstructural properties are investigated. A typical superparamagnetic behavior was observed for faceted nanoparticle agglomerates of nanocomposite. In nanocomposites, polymer layer causes a sharp decrease in spin disorder, which reduces anisotropy constant significantly. This happens because intimate contact poly(thiophene) leads to charge transfer from core via...
In this paper, a very simple and facile approach for the large scale synthesis of uniform size-controllable single-domain magnetite nanoparticles is reported. These were synthesized via thermal decomposition ferric nitrate/ethylene glycol solution. The structural morphological properties carefully studied. Nearly spherical with inverted spinel structure average particle crystallite sizes smaller than 20 nm obtained. magnetic measurements revealed that have saturation value near bulk...
In this work, the structural, electrical, and magnetic properties of orthorhombic TbMnO3 Tb0.67Ho0.33MnO3 ceramics are presented. The lattice parameters Mn-O-Mn bond angle were found to decrease with Ho-substitution as evidenced by Rietveld refinement X-ray diffraction data Raman spectroscopy measurements. A weak ferromagnetic moment was observed in both dc ac measurements Ho-substituted sample possibly due spin canting antiferromagnetic phase. confirmed be multiferroic appearance...
In this review, the state of art in understanding structural phase relations perovskite-structured BiFeO3-based polycrystalline solid solutions is presented and discussed. Issues about close relation between overall physical properties reviewed systems are pointed out It shown that, by adjusting symmetric arrangement, ferroelectric magnetic can be tuned to find specific multifunctional applications. However, an intrinsic mechanism linking arrangement cannot identified, revealing that subject...
In the search to reduce side effects, toxicity and assuring desired effectiveness of drugs, many efforts has been made improve specific drugs’ delivery characteristics. Several carrier nanoparticles have used assist drugs incorporation, absorption transport through bloodstream. However, most chemical synthesis routes are multistep time-consuming treatments and, also, toxic effects. this work, we report a simple one-pot approach for CoFe 2 O 4 (20 100 nm). The magnetic measurements revealed...
Multiferroic behavior of magnetoelectric nanoparticles exhibiting both ferromagnetic and ferroelectric properties find significance in various applications. In this study, core-shell (CSMEN) have been fabricated by coating CoFe2O4 with BaTiO3 weight using hydro-thermal method. The structure was confirmed electron microscopy topographic scanning probe microscopic measurements were performed for further structural analysis. While magnetic force hysteresis loop substantiated the core, piezo...
Lead free piezoelectric materials are being intensively investigated in order to substitute lead based ones, commonly used many different applications. Among the most promising lead-free those with modified NaNbO₃, such as (K, Na)NbO₃ (KNN) and (Ba, Na)(Ti, Nb)O₃ (BTNN) families. From a ceramic processing point of view, high density single phase KNN BTNN ceramics very difficult sinter due volatility alkaline elements, narrow sintering temperature range anomalous grain growth. In this work,...
Multiferroic nanocomposites were prepared in a core-shell configuration, which CoFe2O4 (Cobalt ferrite) is the core and BaTiO3 (Barium Titanate) shell. The synthesized by combination of polymeric citrate-gel methods. X-ray diffraction attested presence, cubic spinel structure, BaTiO3, tetragonal perovskite structure. Infrared spectroscopy showed characteristics cobalt ferrite barium titanate absorption bands. A microstructure was observed TEM images. All samples presented ferrimagnetic-like...
The thermal effect on the phase evolution and crystallinity of raw cobalt-modified Brazilian bentonites was investigated. modified were prepared dispersing bentonite particles in Co2+ hydroxide gels. samples characterized by X-ray diffraction, Fourier transform infrared spectroscopy, analyses energy dispersive spectroscopy. An endothermic peak around 900 °C indicated formation olivine. A test with benzyl alcohol confirmed catalytic activity as acidic catalyst for oxidation.
In this paper, the ferroic properties of polycrystalline LuFe2O4 samples were carefully investigated, and a dissimilar charge ordered state was identified. Strong dielectric dispersion, between 350 K 225 K; formation cluster glass magnetic phases in same temperature range; existence ferrimagnetic transition at 230 indicate coupling ferroelectric orders. Mössbauer spectroscopic investigations, room temperature, revealed unbalanced contributions ferric ferrous iron ions to state.