A5114375069- Magnetic and transport properties of perovskites and related materials
- Luminescence Properties of Advanced Materials
- Advanced Condensed Matter Physics
- Multiferroics and related materials
- Microwave Dielectric Ceramics Synthesis
- X-ray Diffraction in Crystallography
- Nuclear materials and radiation effects
- Bone Tissue Engineering Materials
- Advanced Photocatalysis Techniques
- Magneto-Optical Properties and Applications
- Ferroelectric and Piezoelectric Materials
- Transition Metal Oxide Nanomaterials
- Photonic and Optical Devices
- Optical Coatings and Gratings
- ZnO doping and properties
- Electronic and Structural Properties of Oxides
- Nanoparticles: synthesis and applications
- Corrosion Behavior and Inhibition
- Mercury impact and mitigation studies
- Antimicrobial agents and applications
- Metallic Glasses and Amorphous Alloys
- Education and Public Policy
- Dental Implant Techniques and Outcomes
- Nanoporous metals and alloys
- Graphene and Nanomaterials Applications
Universidade Federal do Rio Grande do Norte
2025
Universidade Federal do Ceará
2014-2018
Universidade Federal do Pará
2018
Universidade Estadual Paulista (Unesp)
2006-2018
Nanomed (Brazil)
2018
University of Houston
2010-2014
Institutos Lactec
2012-2014
Universidade Federal do Paraná
2004-2014
The Scherrer equation is a widely used tool to determine the crystallite size of polycrystalline samples. However, it not clear if one can apply large sizes because its derivation based on kinematical theory X-ray diffraction. For and perfect crystals, more appropriate use dynamical Because appearance materials with high degree crystalline perfection sizes, authors' belief that important establish limit for which be applied. In this work, diffraction peak profiles are calculated using...
The Langmuir-Blodgett (LB) technique was used to immobilize flat graphene oxide (GO) sheets on a PET substrate ascertain as whether the edges of GO play an integral part in its antimicrobial mechanism. observed antibacterial activity suggests that contact with is not fundamental
SrTiO3 crystalline nanoparticles were prepared using the microwave-assisted hydrothermal method at 140 °C with synthesis times varying from 4 to 160 min. Sample characterization showed that is effective in obtaining a relatively short time, which have highest photoluminescence emission. The phase of perovskite-type not significantly influenced by time. However, already obtained min Also, all samples exhibited room temperature blue-green region, where intensity decreased increasing time and...
Substitution of Ba/Ca (0.25/0.75) in Ba<sub>1−x</sub>Ca<sub>x</sub>TiO<sub>3</sub> compounds causes defects which inhibit the growth particles and promote higher photoluminescence emission.
Endometriosis is a common benign gynecological condition characterized by the growth of endometrial gland and stroma located outside uterine cavity, which current approaches for its detection are invasive expensive, limiting their clinical utility. There need cost-effective minimally to facilitate diagnosis this disease. Attenuated total reflection Fourier-transform infrared near spectroscopy combined with multivariate classification were applied as new tool analyze blood plasma samples from...
Abstract The bone‐induction capacity of a porous biphasic calcium phosphate (pBCP) using heterotopic implantation in mouse (mHI‐model) and its efficacy as substitute for autograft mandibular critical‐size defect rabbit (rabMCSD‐model) was investigated. In mHI‐model, pBCP implanted into the thigh muscles bone formation histomorphometrically immunohistochemically evaluated. rabMCSD‐model, 13 mm defects were treated with or repair comparatively evaluated by radiographic histomorphometric...
This communication is a report of our initial research to obtain iron tungstate (FeWO4) nanocrystals by the microwave-hydrothermal method at 170 °C for 45 min. X-ray diffraction patterns showed that FeWO4 prepared with polyethylene glycol-200 have partial preferential orientation in (011) plane relation other sodium bis(2-ethylhexyl)sulfosuccinate and water. Rietveld refinement data indicates all are monophasic wolframite-type monoclinic structures exhibit different distortions on octahedral...
Proteic Sol-Gel method was used for the synthesis of FeNi alloy at different temperature conditions and flow reduction. The solids were characterized by XRD, H 2 -TPR, SEM, TEM, Mössbauer spectroscopy, VSM. It observed X-ray diffraction pure in samples reduced 600°C (40 mL/min flow) 700°C (25 flow). presented stability against oxidizing atmosphere up to 250°C. morphology exhibited agglomerates relatively spherical particles range 10–40 nm. spectroscopy showed presence disordered...
In this paper, it is reported the growth of La0.7Ca0.3MnO3±δ films using a chemical solution deposition method (CSD) by spin-coating technique. Such was prepared through route based on modified polymeric precursor method. Spin-coating different ceramic substrates performed and analyzed X-ray diffraction (XRD), scanning electron microscopy (SEM) photoelectron spectroscopy (XPS). The magnetic response specimens studied SQUID magnetometer. obtained results indicated uniform SrTiO3 LaAlO3 with...
Several methods can be used to obtain, from powder diffraction patterns, crystallite size and lattice strain of polycrystalline samples. Some examples are the Scherrer equation, Williamson–Hall plots, Warren/Averbach Fourier decomposition, Whole Powder Pattern Modeling, Debye function analysis. To apply some these methods, it is necessary remove contribution instrument widths peaks. Nowadays, one main samples for this purpose LaB6 SRM660b commercialized by National Institute Standard...
Crystallographic and microstructural properties of Ho(Ni,Co,Mn)O3±· perovskite-type multiferroic material are reported. Samples were synthesized with a modified polymeric precursor method. The synchrotron X-ray powder diffraction (SXRPD) technique associated to Rietveld refinement method was used perform structural characterization. crystallographic structures, as well properties, studied determine unit cell parameters volume, angles atomic positions, crystallite size strain. energies below...
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Faraday and Kerr effects as well the extraordinary optical transmission in a structure that combines magneto-optical plasmonic properties are studied. The planar consists of four layers, namely, dielectric layer, metal strips, once again dieletric layer magneto-optic one. is magnetized by DC magnetic field normal to it. Our numerical analysis shows rotations this can be increased more than two times comparison with published results. This achieved due high Q-factor resonances layer.