Artigos 2017

Exploring from ab initio calculations the structural and electronic properties of supported metal linear atomic chains on the NiAl (110) surface Abstract: Periodic density functional theory calculations were carried out to study the energetic and […]

Magnetocoupling and domain structure of BiFeO3/LaFeO3 heterostructures deposited on LaSrCoO3/Pt/TiO2/SiO2/Si (100) substrates by the soft chemical method Abstract: BiFeO3 (BFO) and LaFeO3 (LFO) heterostructures were obtained at room temperature on Pt/TiO2/SiO2/Si (100) substrates by chemical […]

Growth of BiVO4 Nanoparticles on a Bi2O3 Surface: Effect of Heterojunction Formation on Visible Irradiation-Driven Catalytic Performance Abstract: Heterostructured materials composed of different semiconductors can be used to decrease rapid charge carrier recombination in photocatalysts, […]

Soluble factors from biofilm of Candida albicans and Staphylococcus aureus promote cell death and inflammatory response Background: The objective of this study was to better understand the effects of soluble factors from biofilm of single-and […]

Stability of rolled-up GaAs nanotubes Abstract: This work presents a theoretical study of gallium arsenide (GaAs) nanotubes obtained from the (100), (110) and (111) crystal planes of zincblende structure in order to evaluate the electronic […]

Electrochemical immunosensor based on ZnO nanorods-Au nanoparticles nanohybrids for ovarian cancer antigen CA-125 detection Abstract: In this research, ZnO nanorods – Au nanoparticles nanohybrids have been fabricated and employed to sensitive electrochemical strategy for the […]

Titanium dioxide nanotubes addition to self-adhesive resin cement: Effect on physical and biological properties Objectives. This study has investigated the influence of Titanium dioxide nanotubes (TiO2-nt) addition to self-adhesive resin cement on the degree of […]

Does the pelletization pressure modify the effective anisotropy of the grains in (Bi,Pb)2223 bulk system? Abstract: In this paper we present a new method to determine separately inter and intragranular magnitudes of polycrystalline superconducting materials, […]

Fast and efficient microwave-assisted synthesis of CaTiO3 Abstract: The traditional methods to synthesize nanocrystalline materials are energy-intensive and time-consuming. This paper describes a fast and simple route to synthesize CaTiO3, which requires just 30 s of […]

Transmission electron microscopy characterization of protective La0.7Sr0.3MnO3-delta coatings prepared by electrostatic spray deposition on ferritic alloy Abstract:  The effect of La0:7Sr0:3MnO3-delta (LSM) coating on SS446 steel on air oxidation at 800 degrees C was investigated by […]

Preparation and photocatalytic properties of hexagonal-shaped ZnO:Sm3+ by microwave-assisted hydrothermal method Abstract: Novel 3D rods ZnO:Sm monophasic microcrystals have been synthesized by the microwave-assisted hydrothermal (MAH) method at 140 degrees C for 10 min. The experimental […]

Effect of Er3+ ions on the phase formation and properties of In(2)O(3)nanostructures crystallized upon microwave heating Abstract: Regular sized nanostructures of indium oxide (In2O3) were homogeneously grown using a facile route, i.e. a microwave-hydrothermal method combined […]

Low temperature micro Raman and laser induced upconversion and downconversion spectra of europium doped silver tungstate Ag2-3xEuxWO4 nanorods Abstract: All the red emitting europium-doped silver tungstate alpha-Ag2-3xEuxWO4 (x = 0.01-0.08 mol) phosphor reported herein crystalise as […]

An automated method to find reaction mechanisms and solve the kinetics in organometallic catalysis Abstract: A novel computational method is proposed in this work for use in discovering reaction mechanisms and solving the kinetics of transition […]

Strongly Red-Shifted Photoluminescence Band Induced by Molecular Twisting in Cyanine (Cy3) Dye Films Abstract: Cyanine dye molecules, used as monomers or in aggregate form, find interesting applications in optoelectronic devices. Among the various aggregate species incorporating […]

Adsorption of NH3 with Different Coverages on Single-Walled ZnO Nanotube: DFT and QTAIM Study Abstract: NH3 adsorption with different coverages on single-walled armchair and zigzag ZnO nanotubes (ZnONT) has been studied via periodic computational simulations at […]

The interplay between morphology and photocatalytic activity in ZnO and N-doped ZnO crystals Abstract: Intrinsic characteristics of the material such as superficial area, morphological structure, and crystalline phase exposition play a fundamental role in the corresponding […]

Oligo- and Poly(fullerene)s for Photovoltaic Applications: Modeled Electronic Behaviors and Synthesis Abstract:  The atom transfer radical addition polymerization (ATRAP) of fullerene to give poly(fullerene)s (PFs) for organic electronics is explored. Quantum chemistry maps the expected electronic […]

Combined theoretical and nanoscale experimental study of Pb(Ca,Ba) TiO3, Pb(Sr,Ba)TiO3, and Pb(Sr,Ca)TiO3 complex perovskite structures: An investigation of the ferroelectric and electronic properties Abstract:  Combined experimental and first-principles studies have been conducted to obtain a fundamental […]

Identification and classification of polymer e-waste using laser-induced breakdown spectroscopy (LISS) and chemometric tools Abstract: In the recycling of polymer e-waste, there is a pressing need for rapid measurement technologies for the simple identification and classification […]

Mechanism of Antibacterial Activity via Morphology Change of alpha-AgVO3: Theoretical and Experimental Insights Abstract: The electronic configuration, morphology, optical features, and antibacterial activity of metastable alpha-AgVO3 crystals have been discussed by a conciliation and association of […]

High-Utilisation Nanoplatinum Catalyst (Pt@cPIM) Obtained via Vacuum Carbonisation in a Molecularly Rigid Polymer of Intrinsic Microporosity Abstract: Polymers of intrinsic microporosity (PIM or here PIM-EA-TB) offer a highly rigid host environment into which hexachloroplatinate(IV) anions are […]

The impact of antimicrobial photodynamic therapy on peri-implant disease: What mechanisms are involved in this novel treatment? Abstract: According to the American Academy of Implant Dentistry. 3 million Americans have dental implants, and this number is […]

Single-nanotube tracking reveals the nanoscale organization of the extracellular space in the live brain Abstract: The brain is a dynamic structure with the extracellular space (ECS) taking up almost a quarter of its volume(1,2). Signalling molecules, […]

Evolution of the structural and microstructural characteristics of SrSn1 – xTixO3 thin films under the influence of the composition, the substrate and the deposition method Abstract: SrSn1 (-) xTixO3 thin films were grown on R-sapphire and […]

Computational study of Th4+ and Np4+ hydration and hydrolysis of Th4+ from first principles Abstract: The aqueous solvation of Th and Np in the IV oxidation state was examined using cluster models generated by Monte Carlo […]

alpha-Ag2-2xZnxWO4 (0 <= x <= 0.25) Solid Solutions: Structure, Morphology, and Optical Properties Abstract: A theoretical study was elaborated to support the experimental results of the Zn-doped alpha-Ag2WO4. Theses alpha-Ag2-2xZnxWO4 (0 <= x <= 0.25) solid […]

Effect of Ag clusters doping on the photoluminescence, photocatalysis and magnetic properties of ZnO nanorods prepared by facile microwave-assisted hydrothermal synthesis Abstract: We report a chemical route to synthesize stabilized ZnO:Ag nanoparticles (NPs) combined with nanosized […]

PtSn Electrocatalyst Supported on MWCNT-COOH: Investigating the Ethanol Oxidation Reaction Abstract: Pt3Sn2 (a : a) electrocatalysts with 20% metal loading on multi-walled carbon nanotube supports functionalized with carboxylic acid groups (MWCNT-COOH) were prepared for studies […]

Polycarbonate/1-(2-hydroxyethyl)-2,3-dimethylimidazolium chloride composite membranes and short-range chain mobility analysis Abstract: In this investigation, the incorporation of imidazolium salt, 1-(2-hydroxehtyl)-2,3-dimethylimidazolium chloride [hydemmim][Cl] within bisphenol A polycarbonate (PC) matrix and the subsequent formation of membranes via casting were […]

Optical and gas-sensing properties, and electronic structure of the mixed-phase CaCu3Ti4O12/CaTiO3 composites Abstract: Combined experimental and theoretical investigations were conducted on the electronic structure, as well as the optical and gas-sensing properties of mixed-phase CaCu3Ti4O12/CaTiO3 (CCTO/CTO) […]

High Order Cyclic Voltammograms During Electrooxidation of Ethanol Catalyzed by Gold Abstract: Under fixed limits, potential sweeps in some electrochemical systems depict current profile whose shape repeats in every n cycle (with n > 1), receiving […]

Atomic pair distribution function at the Brazilian Synchrotron Light Laboratory: application to the Pb1-xLaxZr0.40Ti0.60O3 ferroelectric system Abstract: This work reports the setting up of the X-ray diffraction and spectroscopy beamline at the Brazilian Synchrotron Light Laboratory […]

Novel Nanotechnology of TiO2 Improves Physical-Chemical and Biological Properties of Glass Ionomer Cement Abstract: The aim of this study was to assess the performance of glass ionomer cement (GIC) added with TiO2 nanotubes. TiO2 nanotubes [3%, […]

[2+1] Cycloaddition of Catalytic Ruthenium Vinyl Carbenes: A Stereoselective Controlled Access to (Z)- and (E)-Vinyl Epoxypyrrolidines Abstract: Aza-alkynals undergo a cyclization reaction with diazo compounds in the presence of catalytic amounts of Cp*RuCl(cod) to afford vinyl […]

Synthesis by combustion in solution of Zn2TiO4+Ag for photocatalytic and photodynamic applications in the visible Abstract: Zn2TiO4+Ag compounds were synthesized by the solution combustion path seeking to enhance their photocatalytic and photodynamic response in the visible. […]

Exploiting Decoupled OpenCL Work-Items with Data Dependencies on FPGAs: A Case Study Abstract: In the field of high performance heterogeneous computing systems, field programmable gate arrays (FPGAs) have shown great advantages in terms of acceleration and […]

Microwave-Assisted Hydrothermal Synthesis Of Ni-doped SNO2 Nanoparticles And Their Use as Catalysts in Biodiesel Production Abstract: The high chemical stability and low cost of tin dioxide has been widely reported in the literature, as has its […]

Preparation and characterization the composite PVDF/Pani with nickel particles Abstract: In this work nickel particles were incorporated by physically mixing of resulting powder blends of PVDF/Pani, obtained by chemical synthesis. Homogeneous films were obtained by hot […]

Thermosensitive Poly(N-vinylcaprolactam) Injectable Hydrogels for Cartilage Tissue Engineering Abstract: Injectable hydrogels have gained prominence in the field of tissue engineering for minimally invasive delivery of cells for tissue repair and in the filling of irregular defects. […]

Structural evolution, growth mechanism and photoluminescence properties of CuWO4 nanocrystals Abstract: Copper tungstate (CuWO4) crystals were synthesized by the sonochemistry (SC) method, and then, heat treated in a conventional furnace at different temperatures for 1 h. […]

Evidence for a correlation between total lead concentrations in soils and the presence of geological faults Abstract: The emission of radon gas in regions of geological faults, during the radioactive decay of uranium and thorium, results […]

Effect of titanium and zirconia dental implant abutments on a cultivable polymicrobial saliva community Statement of problem. Peri-implantitis is considered the most important biological complication responsible for late implant failure. The physical chemical properties intrinsic […]

Immune response of patients with recurrent aphthous stomatitis challenged with a symbiotic Background: There are indications that Th1 polarization of immune response plays an important role in the pathogenesis of recurrent aphthous stomatitis (RAS), and […]

Improved ionic conductivity of zirconia-scandia with niobia addition Abstract:  The ionic conductivity and the crystalline structure of ZrO2-10 mol% Sc2O3- x mol% Nb2O5 solid electrolytes were investigated for x=0.25, 0.5 and 1. Dense specimens with relative […]

On the electrochemical properties of Mg-PSZ: an overview Abstract: MgO-doped partially stabilized zirconia is a complex ceramic electrolyte in which all properties, phase composition, and microstructure are strongly influenced by thermal history besides chemical composition. The […]

Non-ohmic properties of CaCu3Ti4O12 thin films deposited By RF-sputtering Abstract:  Calcium copper titanate (CaCu3Ti4O12, CCTO), thin films with polycrystalline nature have been deposited by RF sputtering on Pt/Ti/SiO2/Si (100) substrates at a room temperature followed by […]

Structural investigation and photoluminescent properties of ZnWO4:Dy3+ nanocrystals Abstract:  In this study, ZnWO4: Dy3+ nanocrystals containing 0.5, 1, and 2 mol% of Dy3+ were synthesized by a coprecipitation method and grown in a microwave- assisted hydrothermal […]

Synthesis of ZnO Nanoparticles Assisted by N Sources and their Application in the Photodegradation of Organic Contaminants Abstract:  A modified polymeric precursor method assisted by N sources (urea or melamine) was used to obtain anion-doped ZnO […]

Preparation and structural-optical characterization of dip-coated nanostructured Co-doped ZnO dilute magnetic oxide thin films Abstract:  ZnO-based materials are one of the most studied systems. Their applicability spans over several research areas and industries, like optoelectronics, catalysis […]

Evaluation of dilute- and-shoot and solid-phase extraction methods for the determination of S-metolachlor and metolachlor-OA in runoff water samples by liquid chromatography tandem mass spectrometry Abstract: In this study, two fast methods, i.e., the dilute-and-shoot one […]

Magnetic field effects in Alq(3)-based OLEDs investigated by electrical impedance spectroscopy Abstract: The effect of an external magnetic field on electrical impedance was measured on tris-(8hydroxyquinoline) aluminum (Alq(3)) based OLEDs at different temperatures. Magnetic field effects […]

Low voltage and high frequency vertical organic field effect transistor based on rod-coating silver nanowires grid electrode Abstract: We report on low voltage and high frequency vertical organic field-effect transistors (VOFETs) using silver nanowires (AgNWs) as […]

A building blocks strategy for preparing photocatalytically active anatase TiO2/rutile SnO2 heterostructures by hydrothermal annealing Abstract: Effective heterostructures for photocatalysis need to present good electron-hole mobility among phases, a feature that is only attained with satisfactory […]

CaSnO 3 obtained by modified Pechini method applied in the photocatalytic degradation of an azo dye Abstract: Pure forms of alkaline-earth stannates with perovskite structure (ASnO3, A= Ca2+, Sr2+, Ba2+) have been used as photocatalysts. In […]

Tuning the Morphological, Optical, and Antimicrobial Properties of alpha-Ag2WO4 Microcrystals Using Different Solvents Abstract: New, effective antimicrobial agents are constantly being evaluated for addressing the increased prevalence of bacterial and fungal infections and emerging drug resistance. […]

Effects of microwave-assisted hydrothermal treatment and of use of capping reagent on the photophysical properties of SrMoO4 phosphors Abstract: Strontium molybdate particles (SrMoO4) with uniform shapes have applications in various fields such as phosphors, optical fibers, […]

Nanostructured Assemblies of Gold and Silver Nanoparticles for Plasmon Enhanced Spectroscopy Using Living Biotemplates Abstract: The ability to control the assembly of nanoparticles on substrates used in plasmon-enhanced spectroscopy continues to drive research in the field […]

Alkali Cation Effect During the Oscillatory Electroreduction of H2O2 on Pt Abstract: Hydrogen Peroxide Reduction Reaction (HPRR) catalyzed by Pt was studied in alkaline media and the effect of alkali cations were analyzed by the changes […]

First-Principles Study on Polymorphs of AgVO3: Assessing to Structural Stabilities and Pressure-Induced Transitions Abstract: In this paper, we present a comprehensive theoretical study, based on density-functional theory calculations, and which focuses on the structural and electronic […]

High-performance energy storage of poly (o-methoxyaniline) film using an ionic liquid as electrolyte Abstract: Different materials have been proposed as active electrode in electrochemical capacitors, including conducting polymers. Among them, several papers describe the use of […]

Synthesis and evaluation of alpha-Ag2WO4 as novel antifungal agent Abstract: Because of the need for new antifungal materials with greater potency, microcrystals of alpha-Ag2WO4, a complex metal oxide, have been synthetized by a simple co-precipitation method, […]

Annealing temperature dependence of local piezoelectric response of (Pb, Ca)TiO3 ferroelectric thin films Abstract: In this work, we have systematically investigated the piezo/ferroelectric response of (Pb, Ca)TiO3 thin films prepared by polymeric precursor method using simultaneously […]

The Overoxidation of poly(3-hexylthiophene) (P3HT) Thin Film: CV and EIS measurements Abstract: In this study the electrochemical degradation of electropolymerized poly (3-hexylthiophene) (P3HT) thin film electrode was carried out by mild overoxidation conditions. Cyclic voltammetry (CV) […]

SPEEK/Zeolite/Ionic-Liquid Anhydrous Polymer Membranes for Fuel-Cell Applications Abstract:  Sulfonated poly(ether ether ketone) (SPEEK)/zeolite/ionic-liquid composite membranes were prepared with different amounts of 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([C4MI]CF3SO3) or 1-decyl-3-methylimidazolium trifluoromethanesulfonate ([C10MI]CF3SO3) ionic liquids (ILs). The structure of the composite […]

Effect of metallic Ag growth on the electrical resistance of 3D flower-like Ag4V2O7 crystals Abstract: In this communication, we report for the first time the nucleation and growth of metallic Ag nanoparticles on the surface of […]

Synthesis of Cuboctahedral CeO2 Nanoclusters and Their Assembly into Cuboid Nanoparticles by Oriented Attachment Abstract:  Here, we describe a simple approach to control the oriented attachment process through selective ligand scavenging from the {100} facets of […]

Nitrate-assisted photocatalytic efficiency of defective Eu-doped Pr(OH)(3) nanostructures Abstract: Pr(OH)(3) one-dimensional nanostructures are a less studied member of lanthanide hydroxide nanostructures, which recently demonstrated an excellent adsorption capacity for organic pollutant removal from wastewater. In this […]

Vacuum-annealing induces sub-surface redox-states in surfactant-structured alpha-Fe2O3 photoanodes prepared by ink-jet printing Abstract: Transparent nano-structured hematite (a-Fe203) films of approximately 550 nm thickness on tin-doped indium oxide (ITO) have been obtained conveniently by ink-jet printing of […]

Characterization of the third-order optical nonlinearity spectrum of barium borate glasses Abstract: Borate glasses have proven to be an important material for applications ranging from radiation dosimetry to nonlinear optics. In particular, B2O3-BaO based glasses are […]

SrTi1-yFeyO3 samples obtained by hydrothermal method: The effect of the amount of Fe on structural and photocatalytic properties Abstract: This manuscript describes the synthesis and the photocatalytic efficiency of SrTiO3 (STO) and SrTi1-yFe(y)O(3) (STFO, with 2.5, […]

Effect of Fe3+ Doping in the Photocatalytic Properties of BaSnO3 Perovskite Abstract: In the last ten years, stannates with perovskite structure have been tested as photocatalysts. In spite of the ability of perovskite materials to accommodate […]

La0.5Sm0.5FeO3: a new candidate for magneto-electric coupling at room temperature Abstract: Samarium substituted lanthanum orthoferrite La0:5Sm0:5FeO3 thin film has been prepared by soft chemical method. A single perovskite phase with orthorhombic crystallographic structure was attained. Magnetic and […]

Raman signatures of monoclinic distortion in (Ba1-xSrx)(3)CaNb2O9 complex perovskites Abstract: Octahedral tilting is the most common distortion process observed in centrosymmetric perovskite compounds. Indeed, crucial physical properties of this oxide stem from the tilts of BO6 […]

Blue and red light photoluminescence emission at room temperature from CaTiO3 decorated with alpha-Ag2WO4 Abstract: CaTiO3 (CT) and α-Ag2WO4 (AW) semiconductors are widely known for their interesting electrical and photoluminescence (PL) properties. In this study, we decorated CT with AW for obtaining CaTiO3:α-Ag2WO4 (CT:AW), […]

Facile preparation of CuWO4 porous films and their photoelectrochemical properties Abstract: In this study, the structure and photoelectrochemical properties of CuWO4 porous films synthesized by a co-precipitation method followed by a hydrothermal treatment were investigated. The film was deposited on […]

Superparamagnetic behaviour of zinc ferrite obtained by the microwave assisted method Abstract: Magnetic ZnFe2O4 nanoparticles with magnetization saturation of 12.1 emu/g were synthesized through hydrothermal microwave method at 140 °C for 32 min. These compound is being […]

Elastic modulus of PVDF with bentonite or LiNbO3 using deformation energy Abstract: Polyvinylidene fluoride (PVDF) is valued for its properties of transparency to light, lightness, flexibility, mechanical strength, chemical stability, ease of processing, and low-cost production. […]

Simultaneous time-resolved ATR-SEIRAS and CO-charge displacement experiments: The dynamics of CO adsorption on polycrystalline Pt Abstract: The high sensitivity of ATR-SEIRAS allowed simultaneous recording of time-resolved infrared spectra of the Pt-electrolyte interface and of the current […]

Direct evidence of traps controlling the carriers transport in SnO2 nanobelts Abstract: This work reports on direct evidence of localized states in undoped SnO2 nanobelts. Effects of disorder and electron localization were observed in Schottky barrier […]

Effects of defects, grain size, and thickness on the optical properties of BaTiO3 thin films Abstract Statement of problem Peri-implantitis is considered the most important biological complication responsible for late implant failure. The physical chemical […]

Synergistic effects on polyurethane/lead zirconate titanate/carbon black three-phase composites Abstract: Synergistic processes in hybrid composites have frequently been described in the literature over the past few years, opening doors to new studies and applications for […]

rGO-ZnO nanocomposites for high electrocatalytic effect on water oxidation obtained by microwave-hydrothermal method Abstract: Reduced graphene oxide-zinc oxide (rGO-ZnO) nanocomposites were successfully synthesized using a facile microwave-hydrothermal method under mild conditions, and their electrocatalytic properties towards […]

Piezoelectric, elastic, Infrared and Raman behavior of ZnO wurtzite under pressure from periodic DFT calculations Abstract: The influence of pressure on elastic, piezoelectric (total and clamped-ion contribution), dielectric constants, Infrared and Raman spectra, and topological […]

Photoluminescent properties of the europium and terbium complexes covalently bonded to functionalized mesoporous material PABA-MCM-41 Abstract: In this study, we describe the synthesis of the functionalized inorganic-organic material p-aminobenzoic acid MCM-41 by modification from p-aminobenzoic […]

Photoluminescence and photocatalytic properties of Ag/AgCl synthesized by sonochemistry: statistical experimental design Abstract: Silver chloride (AgCl) particles were produced by sonochemistry synthesis. The effect of the variables such as the time of synthesis, amount of […]

Exchange-bias reversal in Mn2-XNi1+xGa films with antisite disorder Abstract: We report on the exchange-bias reversal in Mn2−xNi1+xGa (x = 0, 0.2, 0.4, and 0.6) thin films grown by molecular beam epitaxy on GaAs substrates. Exchange […]

Electric field assisted sintering of electroceramics and in situ analysis by impedance spectroscopy Abstract: Since the first report several years ago on pressureless sintering of yttria-stabilized zirconia with several seconds at relatively low temperatures by application […]

Ruthenium(II) complexes of Schiff base derived from cycloalkylamines as pre-catalysts for ROMP of norbornene and ATRP of methyl methacrylate Abstract: Ruthenium(II) complexes of Schiff base derived from cycloalkylamines (cycloalkyl = cyclopentyl (1a), cyclohexyl (1b), cycloheptyl (1c), […]

Atom transfer radical polymerization by RuCl2(PPh3)(2)(amine) catalysts: Cyclic amines as tuner of reactivity Abstract: Atom transfer radical polymerizations (ATRP) of styrene (St) and methyl methacrylate (MMA) mediated by [RuCl2(PPh3)2(amine)] complexes, with amine = pyrrolidine (1), piperidine (2), or […]

 Phase stability in scandia-zirconia nanocrystals Abstract: Scandia‐zirconia system has great technological interest as it has the highest ionic conductivity among doped zirconia ceramics. However, polymorphism is the most important limiting factor for application of this […]

Memristive behavior of the SnO2/TiO2 interface deposited by sol-gel Abstract: A novel and cheap Resistive Random Access Memory (RRAM) device is proposed within this work, based on the interface between antimony doped Tin Oxide (4%at […]

Limits on the use of cobalt sulfide as anode of p-type dye-sensitized solar cells Abstract: Thin films of cobalt sulfide (CoS) of thickness l < 10 µm have been employed as anodes of p-type dye-sensitized […]

Thermal analyses of yttrium-doped barium zirconate with phosphor pentoxide, boron oxide and zinc oxide addition Abstract: Yttrium-doped barium zirconate (BZY), one of the protonic conductors considered to be used as solid electrolyte in solid oxide fuel […]

Enthalpies of formation in the scandia-zirconia system Abstract: The scandia‐zirconia (ScZ) solid solutions haphase diagrams, scandium/scandium compounds, Thermodynamicsve been attracting attention from the communities interested in solid‐oxide fuel cells because they possess the highest ionic conductivity […]

Cytotoxicity, genotoxicity and antibacterial activity of poly(vinyl alcohol)-coated silver nanoparticles and farnesol as irrigating solutions Abstract Objective To evaluate the cytotoxicity, genotoxicity and antibacterial activity of poly(vinyl alcohol)-coated silver nanoparticles (AgNPs-PVA) and farnesol (FAR). Design […]

Thermal Treatment Effects on Electrodeposited Sb2Se3 Photovoltaic Thin Films Abstract: Antimony selenide thin films were prepared through potentiostatic co‐electrodeposition by applying −0.6 V from a bath composed of 2.5 mM K(SbO)C4H4O6 ⋅ 0.5 H2O and […]

Nanoscale investigation of ferroelectric and piezoelectric properties in (Pb,Ca)TiO3 thin films grown on LaNiO3/LaAlO3(100) and Pt/Si(111) using piezoresponse force microscopy Abstract: Single phase polycrystalline and strong textured Pb0.76Ca0.24TiO3 (PCT24) thin films have been grown on […]

Use of laser-induced breakdown spectroscopy for the determination of polycarbonate (PC) and acrylonitrile-butadiene-styrene (ABS) concentrations in PC/ABS plastics from e-waste Abstract: Due to the continual increase in waste generated from electronic devices, the management of […]

Evidence for topological behavior in superconducting CuxZrTe2-y Abstract: We present structural, magnetic, electrical, thermal transport, Hall coefficient, and pressure-dependent resistivity measurements on C u x ZrT e 2 − y compounds with x = 0.05 […]

Economically attractive route for the preparation of high quality magnetic nanoparticles by the thermal decomposition of iron(III) acetylacetonate Abstract: The thermal decomposition (TD) methods are among the most successful in obtaining magnetic nanoparticles with a […]

Pre-sintered Y-TZP sandblasting: effect on surface roughness, phase transformation, and Y-TZP/veneer bond strength Abstract: Sandblasting is a common method to try to improve the Y-TZP/veneer bond strength of dental prostheses, however, it may put stress on […]

Intragranular defects and Abrikosov-Josephson vortices in Bi-2223 bulk superconductors Abstract: The Abrikosov–Josephson (AJ) vortices that emerge at intragranular defects of Bi-2223 bulk superconductors are detected. The study is based on the combination of magnetic and […]

Influence of additives on phase stabilization of scandia-doped zirconia Abstract: The effects of small additions of tin, zinc, calcium and boron oxides on phase composition and electrical conductivity of zirconia-10 mol% scandia were investigated. Compounds […]

Ordering effect on the electrical properties of stoichiometric Ba3CaNb2O9-based perovskite ceramics Abstract: Cation ordering is the most common phenomenon detected in A3B′B″2O9-based complex perovskites. Some important physical features of this system are due to the […]

PVDF-PAni blend: a free-standing film with variable electrical resistance Abstract: Films made of a blend of polyaniline (PAni) and a nonpolar polyvinylidene fluoride (PVDF) polymer matrix were obtained by the mechanical mixing of both, with subsequent […]

Occlusal Pressure Analysis of Complete Dentures after Microwave Disinfection: A Clinical Study Abstract Purpose: This clinical study evaluated the effect of microwave disinfection protocolson the occlusal pressure pattern of dentures. Materials and Methods: Dentures were […]

Zirconium oxide and niobium oxide used as radiopacifiers in a calcium silicate-based material stimulate fibroblast proliferation and collagen formation Abstract: Aim To evaluate the influence of the addition of microparticulate (micro) and nanoparticulate (nano) zirconium […]

Microwave-assisted synthesis of anatase-TiO2 nanoparticles with catalytic activity in oxygen reduction Abstract: Anatase titanium dioxide nanoparticles were synthesized via fast microwave-hydrothermal route and they were characterized by BET, SEM, XRD and EIS. The synthesis process took barely 20 s, which […]

Effect of La Doping on the Crystal Structure, Electric, Magnetic and Morphologic Properties of the BSCCO System Abstract: Studies of the doping process can provide a better understanding of the superconducting mechanisms in cuprous oxide materials. […]

Magnetic properties, x-ray absorption spectroscopy and electronic structure of GdCrTiO5 Abstract: We study the electronic structure of GdCrTiO5 polycrystals by means of magnetic susceptibility and heat capacity measurements, as well as x-ray absorption spectroscopies on […]

Computational Simulations of Morphological Transformations by Surface Structures: The Case of Rutile TiO2 phase Abstract: Computational simulations based on periodic density functional theory have been carried out to investigate the control of crystal morphology by accurate […]

Controlling the breakdown electric field in SnO2 based varistors by the insertion of SnO2 nanobelts Abstract: Semiconducting metal oxides have many practical applications, including varistors. Varistors based on SnO2 exhibit both high nonlinear coefficients and […]

Compacting and densification of TiO2 nanoparticles Abstract: This work investigated the compacting and densification behaviour of TiO2 nanoparticles prepared by the simple non-aqueous sol-gel process. The synthesized nanopowder has anatase TiO2 structure with the average crystallite […]

Characterization of crystalline structure and free volume of polyamide 6/nitrile rubber elastomer thermoplastic vulcanizates: Effect of the processing additives Abstract: Blends of polyamide 6 and nitrile rubber (PA6/NBR) dynamically vulcanized may generate innovative products for special […]

BSCCO superconductor micro/nanofibers produced by solution blow-spinning technique Abstract: This paper presents the synthesis and characterization of BSCCO superconducting fibers synthesized by heat-treating poly(vinyl pyrrolidone) (PVP)/BSCCO precursor microfibers produced by the solution blow-spinning technique. Different concentrations […]

Atom Transfer Radical Polymerization of Methyl Methacrylate Mediated by Grubbs 1st and 2nd Generation Catalysts: Insight into the Active Species Abstract: Ruthenium benzylidene complexes were evaluated as catalysts in atom-transfer radical polymerization (ATRP) of methyl methacrylate […]

Adsorption of NH3 with Different Coverages on Single-Walled ZnO Nanotube: DFT and QTAIM Study Abstract: NH3 adsorption with different coverages on single-walled armchair and zigzag ZnO nanotubes (ZnONT) has been studied via periodic computational simulations at the all-electron […]

N-doping SrTiO3@SrCO3 heterostructure electrode: Synthesis, electrochemical characterization, and varistor application Abstract: Optical traditional techniques, such as diffusive reflectance spectroscopy, are used to confirm absorption behavior modification after anion doping process. However, the doping process in some materials […]

Microwave-Electrochemical Deposition of a Fe-Co Alloy with Catalytic Ability in Hydrogen Evolution Abstract: A novel microwave-electrochemical process is shown to allow Fe-Co alloy to be formed at a stainless steel electrode under fast mass transport − […]

Effect of sintering parameters using the central composite design method, electronic structure and physical properties of yttria-partially stabilized ZrO2commercial ceramics Abstract: In this work, the effect of sintering parameters on electronic structure and physical properties of […]

Electronic structure of GaN nanotubes Abstract: Nanotube properties are strongly dependent on their structures. In this study, gallium nitride nanotubes (GaNNTs) are analyzed in armchair and zigzag conformations. The wurtzite GaN (0001) surface is used to […]

A novel approach to obtain highly intense self-activated photoluminescence emissions in hydroxyapatite nanoparticles Abstract: Defect-related photoluminescence (PL) in materials have attracted interest for applications including near ultraviolet (NUV) excitable light-emitting diodes and in biomedical field. In […]

Characterization of defects in copper antimony disulfide Abstract: Copper antimony disulfide (CuSbS2) with the chalcostibite structure is a promising photovoltaic (PV) absorber material with several excellent measured optoelectronic properties, such as a solar matched band gap […]

Challenges on the toxicological predictions of engineered nanoparticles Abstract: The perceived enormous potential of nanotechnology in contributing to sustainable innovation has led to the growth of investments into new industrial applications and consumer products. However, the […]

Computational Modeling for the Ag Nanoparticle Coalescence Process: A Case of Surface Plasmon Resonance Abstract: Motivated by recent transmission electron microscopy (TEM) experiments on α-Ag2WO4, the coalescence process of Ag nanoparticles (NPs) is investigated using molecular […]

Microwave-Assisted Synthesis of Pt-Au Nanoparticles with Enhanced Electrocatalytic Activity for the Oxidation of Formic Acid Abstract: We report the microwave-assisted hydrothermal synthesis of bimetallic Pt-Au nanoparticles with different Pt/Au mole ratio, and investigate their performance […]

Author(s): R. Pereira, P.C. Camargo. A.J.A. de Oliveira, E.C. Pereira. Abstract: In this work, the correlations between synthesis, microstructural characteristics and magnetic properties of electrodeposited NiFeCu alloys were investigated using a factorial design procedure. The molar concentration of […]

Author(s): Rodrigues, Vivian Delmute; de Souza, Gisele Aparecida;  Carvalho, Claudio Luiz; Zadorosny, Rafael. Abstract: Studies of the doping process can provide a better understanding of the superconducting mechanisms in cuprous oxide materials. In this work, we […]

Author(s): Gurgel, G. M.; Lovisa, L. X.; Conceicao, . L. A.; Li, M. S.; Longo, E.; Paskocimas, C. A.; Motta, F. V.; Bomio, M. R. D. Abstract: Lead molybdate (PbMoO4) crystals were synthesized by the facile sonochemical method at 20 kHz frequency […]

Author(s): Teixeira, Guilhermina Ferreira; Silva Junior, Euripedes; Simoes, Alexandre Zirpoli; Longo, Elson; Zaghete, Maria Aparecida. Abstract: NaNbO3 samples were synthesized via a microwave-assisted hydrothermal method for different processing times (ranging from 30 to 90 minutes) […]

Author(s): Dias, Hercules Bezerra; Basso Bernardi, Maria Ines; dos Santos Ramos, Matheus Aparecido; et al. Keywords: composite resins; oxides; products with antimicrobial action; Streptococcus mutans Abstract: The aim of this study was to evaluate the antibacterial activity […]

Writers: Marisa Carvalho Oliveira, Lourdes Gracia, Marcelo de Assis, Ieda Lúcia Viana, Rosa Maria Fernanda do Carmo Gurgel, ElsonLongo. Juan Andrés Keywords: PL emissions; Excited electronic states; DFT calculations; Order-disorder Abstract: CaZrO3 (CZO) powders obtained by the polymeric […]

Writers: F. Abud, L. E. Correa, I. R. Souza Filho, A. J. S. Machado, M. S. Torikachvili, and R. F. Jardim Keywords: study; superconducting properties Abstract: A systematic study of the superconducting properties in a series of arc-melted […]

No início de agosto foi publicado no periódico Journal of Materials Science: Materials in Electronics mais um artigo de pesquisadores do CDMF. Com o título “One-step synthesis of CaMoO4: Eu3+ nanospheres by ultrasonic spray pyrolysis“, o […]

Writers: Murilo F. Gromboni and Dyovani Coelho and Lucia H. Mascaro and Adam Pockett and Frank Marken Keywords: Water splitting; Solar energy; Photocatalysis; Ceramic coating; Photo-kinetics; Microporous membrane Abstract: Nanostructured semiconductor photoanodes play an important role in solar […]

  Writers: Renata S. Magalhães, Wagner D. M. Junior, Agda E. Souza, Silvio R. Teixeira, Máximo S. Li e Elson Longo Keywords: titanates; barium; strontium; mineralizer; microwave; methods Abstract: In this work barium titanate (BT) and […]

Writers: Luís F. da Silva and J.-C. M’Peko and Ariadne C. Catto and Sandrine Bernardini and Valmor R. Mastelaro and Khalifa Aguir and Caue Ribeiro and Elson Longo Keywords: Hydrothermal; Heterojunction; ZnO; SnO2; UV light; Ozone sensor […]

Writers: Beatriz A. Vessalli and Cecilia A. Zito and Tarcísio M. Perfecto and Diogo P. Volanti and Talita Mazon Keywords: Nanocomposites; Sensors; Acetone; Zinc oxide Abstract: Graphene-based composites have emerged as gas sensor due to the possibility to […]

Writers: Martin S. Barbosa and Pedro H. Suman and Jae J. Kim and Harry L. Tuller and José A. Varela and Marcelo O. Orlandi Keywords: Gas sensors; SnO; Catalyst; Impedance spectroscopy; Sensitization Abstract: The gas sensor response of […]

Writers: Cichetto, L; Sergeenkov, S; Diaz, JCCA; Longo, E; Araujo-Moreira, FM Keywords: ferroelectric capacitors; electrical-properties; decomposition; electrode; ablation; fatigue; silicon; growth; afm Abstract: We report the structural and transport properties of LaNiO3 thin films prepared by […]

Writers: L.X. Lovisa and J. Andrés and L. Gracia and M.S. Li and C.A. Paskocimas and M.R.D. Bomio and V.D. Araujo and E. Longo and F.V. Motta Keywords: ZrO2:RE; Photoluminescence; DFT calculations Abstract: Abstract Rare-earth (RE) element-based materials […]

Writers: Patricia Borim and Benedito S. Lima-Neto and Beatriz E. Goi and Valdemiro P. Carvalho Jr. Keywords: Ruthenium; dmso; ATRP; ROMP; Norbornene; Methyl methacrylate Abstract: The catalytic activity of the five-coordinated [RuCl2(PPh3)(S-dmso)2] complex was investigated for ring-opening […]

Writers: Mamani, NC; da Silva, RT; de Zevallos, AO; Cotta, AAC; Macedo, WAD; Li, MS; Bernardi, MIB; Doriguetto, AC; de Carvalho, HB Keywords: Dilute magnetic oxides; Defect ferromagnetism; Co-doped ZnO thin films; Structural and magnetic characterization; diluted […]

Writers: Cibele A. Oliveira and Diogo P. Volanti and André E. Nogueira and Camila A. Zamperini and Carlos E. Vergani and Elson Longo Keywords: Silver molybdate; Photodegradation; Antibacterial; Multifunctional; Crystal growth Abstract: This paper describes the […]

Writers: Rodney Marcelo do Nascimento, Vanessa Rafaela de Carvalho, José Silvio Govone,  Antônio Carlos Hernandes,  Nilson Cristino da Cruz Keywords: ceramic; surfaces Abstract: This manuscript reports an evaluation of the effects of simple chemical-heat treatments on […]

Writers: Goncalves, R; Christinelli, WA; Trench, AB; Cuesta, A; Pereira, EC Keywords:Supercapacitor; Self-Doping; Transmission Lines; DFT; Conducting Polymer; by-layer films; conducting polymers; electrochemical impedance; polyaniline films; assembled films; spectroscopy; electrodes; energy; polymerization; approximation  Abstract: Conducting polymers (CP) […]

Writers: Gurgel, GM; Lovisa, LX ; Pereira, LM; Motta, FV; Li, MS; Longo, E; Paskocimas, CA; Bomio, MRD Keywords: PbMoO4; Earth rare; Sonochemistry; Photoluminescence; photocatalytic activity; luminescent properties; oriented attachment; growth-mechanism; lead molybdate; microcrystals; degradation; crystals; nanostructures; […]

Writers: La Porta, FA; Nogueira, AE; Gracia, L; Pereira, WS; Botelho, G; Mulinari, TA; Andres, J; Longo, E Keywords: ZnS; Nanoparticles; Microwave-assisted solvothermal method; DFT; Photocatalysis; Photoluminescence Abstract: From the viewpoints of materials chemistry and physical chemistry, crystal […]

Writers: Anderson A. Felix and Vinícius D.N. Bezzon and Marcelo O. Orlandi and Damjan Vengust and Matjaž Spreitzer and Elson Longo and Danilo Suvorov and José A. Varela Keywords: CaCu3Ti4O12; Oxygen partial pressure; Phase stability; Non-stoichiometry; Grain […]

Writers: Alessandra Alves Correa; Roger Gonçalves; Rodrigo Pereira; Ernesto Chaves Pereira Keywords: conducting polymers; electrochemistry; properties and characterization Abstract: The effect of the electropolymerization of seven poly(3-methylthiophene) (P3MT) films in the same used monomer solution have been investigated. […]

Writers: Roca, Roman Alvarez and Lemos, Pablo S. and Gracia, Lourdes and Andres, Juan and Longo, Elson Keywords: synthesis; metastable; materials Abstract: The synthesis of metastable solid phases is a pivotal starting point for innovative materials research. […]

Writers: ES Bronze-Uhle, BC Costa, VF Ximenes, PN Lisboa-Filho Keywords: albumin nanoparticles, drug delivery, salicylic acid entrapped, nano-carriers Abstract: Bovine serum albumin (BSA) is highly water soluble and binds drugs or inorganic substances noncovalently for their effective delivery to various affected […]

Writers: Alencar, LDS; Mesquita, A; Feitosa, CAC; Balzer, R; Probst, LFD; Batalha, DC; Rosmaninho, MG; Fajardo, HV; Bernardi, MIB Keywords: BaMoO4; BaWO4; Microwave-assisted hydrothermal; Polymeric precursor; volatile organic-compounds; oxygen mobility; photoluminescence properties; optical characterization; metal tungstates; carbon-monoxide; […]

Writers: Mayra D. Gonçalves, Emerson R. Camargo Keywords: Wet-chemical synthesis; PLZT; Microwave sintering; OPM route Abstract: Lanthanum-doped lead zirconate titanate (Pb0.95La0.05Zr1−xTixO3) with two different compositions, x=0.20 (PLZT20) and 0.80 (PLZT80), were successfully obtained by the […]