Artigos 2015

Formation of Ag nanoparticles on metastable β-Ag2WO4 microcrystals induced by electron irradiation Abstract: In the present work, an easy precipitation method without presence of surfactants is applied to the synthesis of the hexagonal phase of […]

Facet-dependent photocatalytic and antibacterial properties of alpha-Ag2WO4 crystals: combining experimental data and theoretical insights Abstract: In this paper, we have combined the various experimental results and first-principles calculations with a new and interesting discussion to explain […]

Single precursor route to efficient cobalt sulphide counter electrodes for dye sensitized solar cells Abstract: In this work a novel preparation method is proposed for the one step synthesis and thin-film deposition of cost effective counter […]

Heterostructure formation from hydrothermal annealing of preformed nanocrystals Abstract: One of the primary challenges in obtaining heterostructures is control of the morphology and surface features of the components that are suitable for a specific application. In […]

Vanadium pentoxide 1-D nanostructures applied to dye removal from aqueous systems by coupling adsorption and visible-light photodegradation Abstract: This paper evaluates the photocatalytic and dye adsorption properties of highly crystalline orthorhombic vanadium pentoxide (V2O5) one-dimensional (1D) […]

Thermodynamic insights into the self-assembly of capped nanoparticles using molecular dynamic simulations Abstract: Although the molecular modeling of self-assembling processes stands as a challenging research issue, there have been a number of breakthroughs in recent years. […]

The role of oxygen vacancies and their location in the magnetic properties of Ce1-xCuxO2-delta nanorods Abstract:  Ceria (CeO2) is a promising dilute magnetic semiconductor. Several studies report that the intrinsic and extrinsic structural defects are responsible […]

A relationship between structural and electronic order-disorder effects and optical properties in crystalline TiO2 nanomaterials Abstract: The focus of this paper is on the analysis of the structural and electronic order-disorder effects at long, medium and […]

Gold nanoparticles supported on magnesium ferrite and magnesium oxide for the selective oxidation of benzyl alcohol Abstract: Au nanoparticles (Au NPs) have gained significant attention as catalysts for the selective oxidation of alcohols; however, the catalytic […]

Photocatalytic degradation of organic pollutants by shape selective synthesis of beta-Ga2O3 microspheres constituted by nanospheres for environmental remediation Abstract:  A potential single crystalline photocatalyst beta-Ga2O3 with unique spherical morphology has been synthesized using a surfactant assisted […]

Elucidating the real-time Ag nanoparticle growth on alpha-Ag2WO4 during electron beam irradiation: experimental evidence and theoretical insights Abstract: Why and how Ag is formed when electron beam irradiation takes place on alpha-Ag2WO4 in a vacuum transmission […]

An easy method of preparing ozone gas sensors based on ZnO nanorods Abstract:  One-dimensional (1D) ZnO nanorod-like structures were successfully grown via a hydrothermal method to be used as an ozone gas sensor. X-ray diffraction measurements […]

Glycerol as additive in copper indium gallium diselenide electrodeposition: morphological, structural and electronic effects Abstract: The co-electrodeposition of copper, indium, gallium and selenium from a pH 1.5 acid bath onto an FTO substrate in the presence […]

Fingerprints of short-range and long-range structure in BaZr1-xHfxO3 solid solutions: an experimental and theoretical study Abstract: A microwave-assisted hydrothermal method was applied to synthesize BaZr1-xHfxO3, (BZHO) solid solutions at a low temperature, 140 degrees C, and […]

Theoretical Calculation of the Local Heating Effect on the Crystallization of TiO2 Prepared by Sparking Anodization Abstract: Sparks are frequently observed during dielectric breakdown on valve metal oxide films, and several papers investigated their correlation with […]

Square-Wave Voltammetric Determination of Nanomolar Levels of Linuron in Environmental Water Samples Using a Glassy Carbon Electrode Modified with Platinum Nanoparticles within a Dihexadecyl Phosphate Film Abstract: A new sensitive method for linuron determination using a […]

Electropolymerization using binuclear nickel(II) Schiff base complexes bearing N4O4 donors as supramolecular building blocks Abstract: The supramolecular building blocks from a nickel(II) bisalphen-type complex have been reported. The conjugations through the bridge provide flexibility of the […]

Effect of Fe-doping on the structural, microstructural, optical, and ferroeletric properties of Pb1/2Sr1/2Ti1-xFexO3 oxide prepared by spin coating technique Abstract: The influence of Fe content on the structural, microstructural, dielectric, ferroelectric and optical properties was investigated […]

Monitoring a CuO gas sensor at work: an advanced in situ X-ray absorption spectroscopy study Abstract:  X-ray absorption near edge structure (XANES) and electrical measurements were used to elucidate the local structure and electronic changes of […]

Synthesis of BiVO4 via oxidant peroxo-method: insights into the photocatalytic performance and degradation mechanism of pollutants Abstract: This paper reports the synthesis of monoclinic bismuth vanadate (BiVO4) by the oxidant peroxide method with crystallization under hydrothermal […]

Study of the scattering of the light in aqueous samples collagen in the presence of nanoparticles and curcuma pigment Abstract:  In this work we investigate the scattering of light in means turbid in the presence or […]

Structural and photoluminescence properties of Eu3+ doped alpha-Ag2WO4 synthesized by the green coprecipitation methodology Abstract: Europium doped silver tungstates alpha-Ag2-3xEuxWO4 (x = 0, 0.0025, 0.005, 0.0075 and 0.01 mol) were synthesized by the coprecipitation method at […]

One-step preparation of the BiVO4 film photoelectrode Abstract:  A one-step method of preparing photoelectrochemically active nanostructured BiVO4 films is reported based on thermolysis (500 A degrees C in air) of a polyethylene glycol (PEG300) “paint-on” precursor […]

Synthesis of potassium niobates by the microwave-assisted solvothermal method Abstract: Potassium niobates have been synthesized by different methods, but few papers use the microwave-assisted solvothermal method, with possibility of a deeper evaluation in this area. In […]

Effect of selected herbicides on growth and lipid content of Nannochloris oculata Abstract: Nannochloris oculata (Droop) D.J. Hibberd has attracted attention as a potential source of biofuels because of high oil content and rapid growth rate. […]

Thermal treatment improvement of CuSbS2 absorbers Abstract: Thermal treatment in Sb2S3 vapor was used to improve the quality of CuSbS2 thin films, a promising non-toxic and earth-abundant absorber. A change in the CuSbS2 crystallographic texture and […]

Toward a new generation of white phosphors for solid state lighting using glassy yttrium aluminoborates Abstract: We present a new family of highly emissive white phosphors. These phosphors are based on original glassy yttrium aluminoborates (g-YAB) […]

Local structure and photoluminescence properties of nanostructured Zn1-xMnxS material Abstract: Zinc sulfide (ZnS) pure or doped has received remarkable attention because of fundamental properties, versatility and potential for several technological applications as luminescent material. In this […]

Structural, morphological and optical investigation of beta-Ag2MoO4 microcrystals obtained with different polar solvents Abstract: This communication reports the formation of beta-silver molybdate (beta-Ag2MoO4) microcrystals synthesized by a simple precipitation method using different polar solvents (water, methanol, […]

Rietveld refinement, cluster modelling, growth mechanism and photoluminescence properties of CaWO4:Eu3+ microcrystals Abstract: CaWO4:Eu3+ microcrystals (with 0, 1, 2 and 4 mol% Eu3+) were synthesized by a co-precipitation (CP) method and grown in a microwave-assisted hydrothermal […]

Rh(III)-catalyzed [5+1] oxidative cycloaddition of arylguanidines with alkynes: a novel access to C4-disubstituted 1,4-dihydroquinazolin-2-amines Abstract: Anovel and mild Rh-III-catalyzed [5+1] oxidative cycloaddition between arylguanidines and alkynes efficiently affords C4-disubstituted 1,4-dihydroquinazolin-2-amines. Members of this family of heterocycles, […]

Photoluminescence in NaNbO3 particles and films Abstract: In this work, we report the photoluminescence properties of NaNbO3 particles and films. The crystallization of NaNbO3 particles produced Na2NbO6.nH(2)O intermediate phase which was then converted to NaNbO3 following […]

Impact of the Alkali Cation on the Oscillatory Electro-Oxidation of Ethylene Glycol on Platinum Abstract: We report the effect of alkali cation (Li+, Na+, and K+) on the oscillatory electro-oxidation of ethylene glycol in alkaline media. […]

10 to 25-fold increase in the transport superconducting critical current density of spark-plasma sintered Bi-2223 superconductors Abstract: Pre-reacted powders of (Bi-Pb)(2)Sr2Ca2Cu3O10+delta (Bi-2223) were consolidated by using the spark plasma sintering (SPS) technique under vacuum and at […]

A comparison of charge-transfer mechanisms at rotated disk electrode for biomimetic binuclear and tetranuclear oxo-manganese complex in aqueous solution Abstract: Many high-valence multinuclear mu-oxo-bridged manganese complexes have been synthesized to mimic the active site of the […]

Degree of conversion of different composite resins photo-activated with light-emitting diode and argon ion laser Abstract: This study evaluated the degree of conversion (DC%) of one experimental and different brands of composite resins light-cured by two […]

Insights into electrodegradation mechanism of tebuconazole pesticide on Bi-doped PbO2 electrodes Abstract:  The effect of the Bi doping of PbO2 coatings on the electrochemical degradation of the pesticide tebuconazole (TBC) was investigated. The insertion of 8% […]

Oscillatory Electro-oxidation of Methanol on Nanoarchitectured Pt-pc/Rh/Pt Metallic Multilayer Abstract: The oscillatory electro-oxidation of methanol was studied on polycrystalline Pt-pc and Pt-pc/Rh-2.0/Pt-1.0 metallic multilayers. The surfaces investigated consisted of 1.0 Pt outlayer surface deposited onto 2.0 […]

Antimicrobial photodynamic therapy against pathogenic bacterial suspensions and biofilms using chloro-aluminum phthalocyanine encapsulated in nanoemulsions Abstract: Antimicrobial photodynamic therapy represents an alternative method of killing resistant pathogens. Efforts have been made to develop delivery systems for […]

Local structure and hybridization states in Ba0.9Ca0.1Ti1-xZrxO3 ceramic compounds: Correlation with a normal or relaxor ferroelectric character Abstract: This paper reports on a multi-edge X-ray absorption analysis to elucidate how the substitution of Ti4+ by Zr4+ […]

Surface treatment of dental porcelain: CO2 laser as an alternative to oven glaze Abstract: This work tested continuous CO2 laser as a surface treatment to dental porcelain and compared it to oven glaze (auto-glaze) by means […]

A joint experimental and theoretical study on the electronic structure and photoluminescence properties of Al-2(WO4)(3) powders Abstract: In this paper, aluminum tungstate Al-2(WO4)(3) powders were synthesized using the co-precipitation method at room temperature and then submitted […]

A large red-shift in the photoluminescence emission of Mg1-xSrxTiO3 Abstract: In this letter, we report a detailed study of the influence of the synthesis and the optical properties of Sr-doped MgTO3 powders synthesized via a polymeric […]

Nucleophilic Addition of Amines to Ruthenium Carbenes: ortho-(Alkynyloxy)benzylamine Cyclizations towards 1,3-Benzoxazines Abstract: A new ruthenium-catalyzed cyclization of ortho-(alkynyloxy)benzylamines to dihydro-1,3-benzoxazines is reported. The cyclization is thought to take place via the vinyl ruthenium carbene intermediates which […]

Comparative gas sensor response of SnO2, SnO and Sn3O4 nanobelts to NO2 and potential interferents Abstract: The gas sensor performance of single crystalline tin oxide nanobelts in different oxidation states (SnO2, SnO and Sn3O4), synthesized by […]

Structure, Morphology, and Optical Properties of (Cal(1-3x)Eu(2x)) WO4 Microcrystals Abstract: In this letter, we report the efficient, surfactant-free, microwave-hydrothermal method of synthesizing calcium europium tungstate [(Ca1-3XEu2X) WO4, x= 0, 0.05, 0.01, 0.02, and 0.04] microcrystals. The […]

Rapid Preparation of (BiO)(2)CO3 Nanosheets by Microwave-Assisted Hydrothermal Method with Promising Photocatalytic Activity Under UV-Vis Light Abstract: Crystalline (BiO)(2)CO3 nanosheets were synthesized by a rapid one-step reaction via microwave-assisted hydrothermal method using urea as a morphology […]

A theoretical investigation of the structural and electronic properties of orthorhombic CaZrO3 Abstract: A CaZrO3 (CZO) powder was prepared by the soft chemical, polymeric precursor method (PPM). The CZO crystalline structure was investigated by powder X-ray […]

Structural and optical properties of ZnS/MgNb2O6 heterostructures Abstract:  In this letter, we report a simple and efficient synthetic procedure where the first step is a coprecipitation/calcination method used to obtain magnesium niobate MgNb2O6 (MN) nanoctystals and […]

Microstructural, structural and optical properties of nanoparticles of PbO-CrO3 pigment synthesized by a soft route Abstract: PbCrO4 and Pb2CrO5 particles were synthesized by the polymeric precursor method. Structural and microstructural properties of the particles were characterized […]

Effect of different starting materials on the synthesis of Ba0.8Ca0.2TiO Abstract: Literature has reported the synthesis of barium calcium titanates by various synthesis methods such as solid state reaction, co-precipitation and polymer precursors. These compounds are […]

Theoretical Study of the Stoichiometric and Reduced Ce-Doped TiO2 Anatase (001) Surfaces Abstract: The effects of Ce doping (2.6%) on the oxygen vacancy (V-O) formation energy (Et) and the electronic structure of the anatase TiO2(001) surface […]

Experimental and Theoretical Study on the Structure, Optical Properties, and Growth of Metallic Silver Nanostructures in Ag3PO4 Abstract: Theoretical and experimental studies were performed on the structure, optical properties, and growth of silver nanostructures in silver […]

Crystal growth and photoluminescence of europium-doped strontium titanate prepared by a microwave hydrothermal method Abstract: This article reports that europium-doped strontium titanate (SrTiO3:Eu3+) was successfully synthesized using a co-precipitation method at room temperature with processing in […]

In situ sonochemical synthesis of ZnO particles embedded in a thermoplastic matrix for biomedical applications Abstract: Zinc oxide particles were synthesized and dispersed in situ in a polystyrene (PS) matrix using ultrasound. PS ultrasonic degradation was […]

Microstructural Features and Functional Properties of Bilayered BaTiO3/BaTi1-xZrxO3 Ceramics Abstract: Validity of mixture rule for dielectrics in series configuration and the correlation between microstructure and electrical properties in bilayered BaTiO3/BaTi1-xZrxO3 ceramics were studied. Samples were obtained […]

Photoluminescence of BaZrO3 explained by a order/disorded transformation Abstract: A hydrothermal (HTMW) microwave method was used to synthesize ordered-disordered BaZrO3 (BZ) nanoparticles at temperature of 140 A degrees C with times ranging from 15 min to […]

Optoelectronic characteristics of single InP nanowire grown from solid source Abstract: InP nanowires were synthesized on quartz substrates via vapour phase deposition using gold seeds and solid source. The properties of the InP nanowires were investigated […]

Dynamics of Biofilm Formation and the Interaction between Candida albicans and Methicillin-Susceptible (MSSA) and -Resistant Staphylococcus aureus (MRSA) Abstract: Polymicrobial biofilms are an understudied and a clinically relevant problem. This study evaluates the interaction between C. […]

Emission tunability and local environment in europium-doped OH–free calcium aluminosilicate glasses for artificial lighting applications Abstract: The relationship between emission tunability and the local environment of europium ions in OH–free calcium aluminosilicate glasses was investigated, focusing […]

Towards the understanding of the interfacial pH scale at Pt(111) electrodes Abstract: The determination of the potentials of zero total and free charge, pztc and pzfc respectively, were made in a wide pH range by using […]

Characterization of hard coatings produced by laser cladding using laser-induced breakdown spectroscopy technique Abstract: Protective coatings with a high abrasive wear resistance can be obtained from powders by laser cladding technique, in order to extend the […]

Magnetoelectric Response in (1-x)PbZr0.65Ti0.35O3-xBaFe(12)O(19) Multiferroic Ceramic Composites Abstract: The magnetoelectric (ME) properties of PbZr0.65Ti0.35O3-BaFe12O19 (PZT-BaM) multiferroic ceramic composites have been investigated in this work. These materials, containing both the ferroelectric PZT and ferrimagnetic BaM phases, were […]

CO2 Laser Glazing Treatment of a Veneering Porcelain: Effects on Porosity, Translucency, and Mechanical Properties Abstract: This work tested CO2 laser as a glazing agent and investigated the effects of irradiation on the porosity, translucency, and […]

Cu, Fe, or Ni doped molybdenum oxide supported on Al2O3 for the oxidative dehydrogenation of ethylbenzene Abstract: Molybdenum-based catalysts supported on Al2O3 doped with Ni, Cu, or Fe oxide were synthesized and used in ethylbenzene dehydrogenation […]

Quantum chemical topological analysis of hydrogen bonding in HX horizontal ellipsis HX and CH3X horizontal ellipsis HX dimers (X= Br, Cl, F) Abstract: We present a systematic investigation of the nature and strength of the hydrogen […]

Trajectory-Based Co-Localization Measures for Nanoparticle-Cell Interaction Studies Abstract: High‐resolution live cell microscopy will soon have a fundamental role in understanding bio‐nano interactions, providing material that can be exploited using single particle tracking techniques. The present work uses […]

Metal-insulator transition in Nd1-xEuxNiO3: Entropy change and electronic delocalization Abstract: The metal-insulator (MI) phase transition in Nd1-xEuxNiO3, 0 <= x <= 0.35, has been investigated through the pressure dependence of the electrical resistivity rho(P, T) and […]

Frequency dielectric response of ferroelectric-magnetic ceramic composites like PbZr0.65Ti0.35O3-BaFe12O19 Abstract:  The dielectric properties of PbZr0.65Ti0.35O3-BaFe12O19 (PZT BaM) multiferroic ceramic composites, obtained from the conventional solid-state reaction method, have been investigated. While there is some dielectric dispersion […]

A Combined Experimental and Theoretical Study on the Formation of Ag Filaments on beta-Ag2MoO4 Induced by Electron Irradiation Abstract: A combined experimental and theoretical study is presented to understand the novel observed nucleation and early evolution […]

In situ transmission electron microscopy study of nanoparticle sintering Abstract: The control and the understanding of the sintering process are of utmost scientific and technological importance due to the intrinsic dependence of the characteristic of a […]

Influence of lithium disilicate addition on the dielectric properties of chemically synthesized CaCu3Ti4O12 Abstract: The effects of the method of synthesis along with the introduction of a sintering aid on the electric and dielectric properties of […]

Corrosion of AISI 1020 steel in crude oil studied by the electrochemical noise measurements Abstract: In this work, the corrosion process of AISI 1020 in crude oil, to which different amounts of sea water (0.5 and […]

Sensitive determination of 17 beta-estradiol in river water using a graphene based electrochemical sensor Abstract: In this study, a novel material for the electrochemical determination of 17 beta-estradiol using an electrode based on reduced graphene oxide […]

Ce1-xCoxO2 Nanorods Prepared by Microwave-Assisted Hydrothermal Method: Novel Catalysts for Removal of Volatile Organic Compounds Abstract: In this study, nanorods of a Ce1-xCoxO2 system, with x = 0, 0.05, 0.10, 0.15 and 0.20, were synthesized employing […]

Effects of time exposure and low power sonochemical treatment on ZnO mesostructures Abstract:  A variety of technological applications related to oxide semiconductor-based devices has attracted great interest in the scientific community. Among these materials, zinc oxide […]

Electrophoretic deposition of (Zn, Nb)SnO2-films varistor superficially modified with Cr3+ Abstract: Recently, there has been an important rise in the research and development aimed to improve the properties of SnO2-based varistors. Meanwhile, due to fact that […]

CHARACTERIZATION OF GERMANIUM NANOWIRES SYNTHESIZED USING COPPER AS CATALYST METAL Abstract: This paper presents reliable synthesis of germanium nanowires by the vapor-liquid-solid method using copper as an alternative catalyst to gold, the most commonly used metal. […]

Study of the potentiometric properties of spinel-type manganese oxide doped with gallium and anions Ga0.02Mn1.98O3.98X0.02 (X = S2- and F-) as selective sensor for lithium ion Abstract: This paper describes the development of a selective lithium […]

A Comparative Quantum Chemical Study of a Novel Synthetic Prenylated Chalcone: High Accuracy of NMR C-13 GIAO-DFT Scaling Factor Calculations at the mPW91PW91/6-31G(d) Level of Theory Abstract: Chalcones are important intermediates for the synthesis of biologically […]

High Cost-Effectiveness Ratio: GIAO-mPW1PW91/6-31G(d)//PM7 Scaling Factor for C-13 NMR Chemical Shifts Calculation Abstract: In this paper, we present a GIAO-HDFT universal scaling factor and a linear regression comparative study, in which we intent to investigate the […]

Coupled electronic and morphologic changes in graphene oxide upon electrochemical reduction Abstract: A systematic study of the electrochemical reduction of graphene oxide was performed. The graphene oxide was reduced electrochemically in phosphate buffer solution by applying […]

Rietveld Method in the Analysis of Polymorphism in Mebendazole Tablets Acquired in Brazil’s Drugstores Abstract: Mebendazole (MBZ) is an anthelmintic medicine known to exhibit the polymorphs A, B and C, where polymorph C is the one […]

Enhancement of ferromagnetic and ferroelectric properties in calcium doped BiFeO3 by chemical synthesis Abstract: Calcium (Ca)-doped bismuth ferrite (BiFeO3) thin films prepared by using the polymeric precursor method (PPM) were characterized by X-ray diffraction (XRD), atomic […]

Influence of titanium precursor on photoluminescent emission of micro-cube-shaped CaTiO3 Abstract: For this research, we studied the influence of titanium tetrachloride (TC) and titanium tetraisopropoxide (TTP) precursors on CaTiO3 (CTO) synthesis by employing a microwave-assisted hydrothermal […]

Extraction of natural red colorants from the fermented broth of Penicillium purpurogenum using aqueous two-phase polymer systems Abstract:  Safety concerns related to the increasing and widespread application of synthetic coloring agents have increased the demand for […]

Evidence for resonant scattering of electrons by spin fluctuations in LaNiO3/LaAlO3 heterostructures grown by pulsed laser deposition Abstract: We present measurements of resistivity rho in highly oriented LaNiO3 films grown on LaAlO3 substrates by using a […]

Antimicrobial activity of TiO2:Ag nanocrystalline heterostructures: Experimental and theoretical insights Abstract: We report the synthesis and characterization of silver-decorated titanium dioxide (TiO2:Ag) nanoparticles, as well as a discussion of their antimicrobial activity. This material was synthesized […]

Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content Abstract:  The structural and photoluminescent properties at room temperature of CeO2 and La-doped CeO2 particles were undertaken. The obtained particles were synthesized by a […]

Influence of processing route on electrical properties of Bi4Ti3O12 ceramics obtained by tape-casting technology Abstract: Bismuth titanate powders (Bi4Ti3O12-BIT) were fabricated by solid state reaction (SSR) and polymeric precursor method (PPM). From these powders, Bi4Ti3O12 pellets […]

A Simple and Rapid Estimation of Totals Polyphenols Based On Carbon Paste Electrode Modified with Ruthenium Oxo-Complex Abstract: A simple and fast method based on electrochemical measurements was proposed for estimation of total polyphenols using a […]

Rapid synthesis of Co, Ni co-doped ZnO nanoparticles: Optical and electrochemical properties Abstract: We report for the first time a rapid preparation of Zn1-2xCoxNixO nanoparticles via a versatile and environmentally friendly route, microwave-assisted hydrothermal (MAH) method. […]

Effects of surface stability on the morphological transformation of metals and metal oxides as investigated by first-principles calculations Abstract: Morphology is a key property of materials. Owing to their precise structure and morphology, crystals and nanocrystals […]

Development of a versatile rotating ring-disc electrode for in situ pH measurements Abstract: There are some electrocatalytic reactions in which the key parameter explaining their behavior is a local change in pH. Therefore, it is of […]

Interplay between alpha-relaxation and morphology transition of perfluorosulfonate ionomer membranes Abstract:  Nafion alpha-relaxation is the subject of intense investigations as it regulates the performance of electric actuators and polymer electrolyte fuel cells. Dielectric spectroscopy and atomic […]

Investigation of structural and optical properties of CaTiO3 powders doped with Mg2+ and Eu3+ ions Abstract: In this work, CaTiO3 powders doped with Mg2+ ions and CaTiO3 powders co-doped with Mg2+ and Eu3+ ions were prepared […]

Single-Step Exfoliation and Covalent Functionalization of MoS2 Nanosheets by an Organosulfur Reaction Abstract: A simple approach to exfoliate and functionalize MoS2 in a single-step is described, which combines the dispersion of MoS2 in polybutadiene solution and […]

Niobium pentoxide as radiopacifying agent of calcium silicate-based material: evaluation of physicochemical and biological properties Abstract: Objectives The physicochemical properties and the tissue reaction promoted by microparticulated or nanoparticulated niobium pentoxide (Nb2O5) added to calcium silicate-based […]

Effect of lanthanum and lead doping on the microstructure and visible light photocatalysis of bismuth titanate prepared by the oxidant peroxide method (OPM) Abstract: Pure (Bi12TiO20) and La- and Pb-doped (Bi12-xLaxTiO20 e Bi12-xPbxTiO20, with “x” up […]

DFT and Kinetic Monte Carlo Study of TMS-Substituted Ruthenium Vinyl Carbenes: Key Intermediates for Stereoselective Cyclizations Abstract: Mechanistic pathways for the cyclization of 1,5-aknylacetal with N,CHTMS in the presence of Cp- and Cp*RuCl(cod) to afford (Z)- […]

Visible-light photocatalysis with bismuth titanate (Bi12TiO20) particles synthesized by the oxidant peroxide method (OPM) Abstract: In this paper, we have successfully synthesized high quality single crystalline bismuth titanate with sillenite (Bi12TiO20) phase by the oxidant peroxide […]

Facile Microwave-Assisted Synthesis of Lanthanide Doped CaTiO3 Nanocrystals Abstract: This article discusses a simple approach for the microwave-assisted synthesis of good quality nanosized calcium titanate crystals doped with trivalent Tm and Yb lanthanide ions. The prepared […]

Study of Thermal Degradation of PLGA, PLGA Nanospheres and PLGA/Maghemite Superparamagnetic Nanospheres Abstract: Poly(glycolide-co-lactide) (PLGA) nanospheres containing magnetic materials have been extensively studied because of its biomedical applications. Therefore, it is very important to know thermal […]

Investigation on magnetic and electric properties of morphologically different perovskite LaFeO3 nanostructures Abstract: In the present study, investigation on magnetic and electric properties of LaFeO3 nanostructures like nanopetals, dendrites, nanorods and nanospheres prepared by surfactant-assistant hydrothermal […]

Catalytic Cyclization of o-Alkynyl Phenethylamines via Osmacyclopropene Intermediates: Direct Access to Dopaminergic 3-Benzazepines Abstract: A novel osmium-catalyzed cyclization of o-alkynyl phenethylamines to give 3-benzazepines is reported. The procedure allows the straightforward preparation of a broad range […]

Effect of Pressure-Assisted Heat Treatment on Photoluminescence Emission of alpha-Bi2O3 Needles Abstract: Materials with high photoluminescence (PL) intensity can potentially be used in optical and electronic devices. Although the PL properties of bismuth(III) oxide with a […]

Diamagnetic, paramagnetic, and ferromagnetic properties of ball milled Bi1.65Pb0.35Sr2Ca2Cu3O10+delta powders Abstract: We have performed a systematic study of the general physical properties of (Bi,Pb)(2)Sr2Ca2Cu10+y (Bi-2223) powders that were ball milled for time intervals of up to […]

Biodiesel obtained by ethylic transesterification using CuO, ZnO and CeO2 supported on bentonite Abstract: This research aims to study the feasibility of using bentonite clays in their natural form, acidified and impregnated with CuO, ZnO and […]

Electrochemical investigation of the voltammetric determination of hydrochlorothiazide using a nickel hydroxide modified nickel electrode Abstract: The preparation and electrochemical characterization of a nickel hydroxide modified nickel electrode as well as its behavior as electrocatalyst toward […]

Effect of different strontium precursors on the growth process and optical properties of SrWO4 microcrystals Abstract: In this paper, an experimental study was performed on the effect induced by different strontium precursors in the growth processes […]

Phase composition, densification and electrical conductivity of La0.9Sr0.1Ga0.8Mg0.2O3-delta consolidated by the two-stage sintering method Abstract: The influence of the method of sintering on densification, phase assemblage and electrical conductivity of Sr- and Mg-doped lanthanum gallate was […]

Hydrothermally assisted synthesis of YMnO3 Abstract: In this work single phase hexagonal YMnO3 powders were prepared starting from Y(CH3COO)(3)center dot xH(2)O, Mn(CH3COO)(2)center dot 4H(2)O, KMnO4 and KOH using methods of conventional (280 degrees C for 6 […]

A novel and large area suitable water-based ink for the deposition of cobalt sulfide films for solar energy conversion with iodine-free electrolytes Abstract: A novel, cheap, reliable water based precursor ink has been used for the […]

Identifying and rationalizing the morphological, structural, and optical properties of beta-Ag2MoO4 microcrystals, and the formation process of Ag nanoparticles on their surfaces: combining experimental data and first-principles calculations Abstract: We present a combined theoretical and experimental […]

Supramolecular Architecture and Electrical Properties of a Perylene Derivative in Physical Vapor Deposited Films Abstract: The supramolecular structure of organic thin films is a key factor in their optical and electrical properties and, consequently, in the […]

Multiferroic (NiZn) Fe2O4-BaTiO3 composites prepared from nanopowders by auto-combustion method Abstract: Nickel zinc ferrite (NZF) and barium titanate (BT) were prepared by auto-combustion synthesis as an effective, simple and rapid method. Multiferroic composites with the general […]

Synthesis of Pr3+-doped CaTiO3 using polymeric precursor and microwave-assisted hydrothermal methods: A comparative study Abstract: Praseodymium-doped calcium titanate, CaTiO3:Pr3+, powders (0 and 2 mol% Pr3+ ions) were synthesized using the polymeric precursor and microwave-assisted hydrothermal methods. […]

Spark Plasma Sintering of Bi1.65Pb0.35Sr2Ca2Cu3O10+delta Superconducting Samples: Evaluation of Microstructure and Mechanical Properties Abstract: Powders of single-phase Bi1.65Pb0.35 Sr2Ca2Cu3O10+delta (Bi-2223) were consolidated by the spark plasma sintering (SPS) method at 750 C-a similar to. The SPS […]

Scaling like behaviour of resistivity observed in LaNiO3 thin films grown on SrTiO3 substrate by pulsed laser deposition Abstract: We discuss the origin of the temperature dependence of resistivity. observed in highly oriented LaNiO3 thin films […]

The role of defects on the structural and magnetic properties of Nb2O5 Abstract: Defects play a fundamental issue on physical properties of wide bandgap materials. We present here the effect of preparation and annealing conditions on […]

Construction Of a Low-Cost System For High Frequency Data Acquisition During Electrochemical Experiments Abstract: This work reports the building of a low-cost experimental setup for high temporal resolution data acquisition. The setup is useful for different […]

Observation of superficial antiferromagnetism in Co3O4 polycrystals Abstract: We report on a systematic study about the magnetic properties of Co3O4 polycrystals with large size distribution (100-1200 nm) and the crystallite size of 68(4) nm on average. […]

Pigments based on Cr and Sb doped TiO2prepared by microemulsion-mediated solvothermal synthesis for inkjet printing on ceramics Abstract:A ceramic pigment with nominal composition Ti0.97Cr0.015Sb0.015O2 was prepared by microemulsion-mediated solvothermal method at 180 degrees C. Anatase […]

Antiferromagnetism induced by oxygen vacancies in V2O5 polycrystals synthesized by the Pechini method Abstract: Optical and magnetic properties of V2O5 polycrystals were investigated through photoluminescence (PL) and magnetization measurements. The PL spectra comprise two main bands […]

Application of oxo-manganese complex immobilized on ion-exchange polymeric film as biomimetic sensor for nitrite ions Abstract: A biomimetic sensor based on oxo-bridged dinuclear manganese-phenanthroline complex immobilized into an ion-exchange polymeric film deposited on glassy carbon electrode […]

Formation and evolution of TiO2 nanotubes in alkaline synthesis Abstract: One-dimensional nanostructures have been intensively studied, from the point of view of their synthesis and mechanics of formation, as well as their applications. Titanium dioxide nanoparticles […]

Far-infrared spectroscopic study of CeO2 nanocrystals Abstract: We present the far-infrared reflectivity spectra of 5 nm-sized pure and copper-doped Ce1−x Cu xO2−y (x = 0; 0.01 and 0.10) nanocrystals measured at room temperature in the 50–650 cm−1spectral range. Reflectivity spectra were analyzed using […]

Rietveld refinement and optical properties of SrWO4:Eu3+ powders prepared by the non-hydrolytic sol-gel method Abstract: We investigated the effect of annealing time on the structure and optical properties of SrWO4:Eu3+ powders prepared by the non-hydrolytic sol-gel method […]

Rapid hydrothermal synthesis and pH-dependent photocatalysis of strontium titanate microspheres Abstract: This manuscript describes a methodology for a rapid hydrothermal conventional synthesis of SrTiO3. The time of synthesis and use of mechanical stirring are related to […]

Light emission during electric field-assisted sintering of electroceramics Abstract: Electric field-assisted sintering has been shown to occur in ion, electron conducting as well as in insulating polycrystalline ceramics. Considerable linear shrinkage with microstructure control at temperatures lower than […]

Fabrication and structural characterization of bismuth niobate thin films grown by chemical solution deposition Abstract: Bi3NbO7 (BNO) thin films were deposited on Pt/TiO2/SiO2/Si (100) substrates at room temperature from the polymeric precursor method. X-ray powder diffraction and […]

Crystallinity, morphology and high dielectric permittivity of NiO nanosheets filling Poly(vinylidene fluoride) Abstract: Composite films based on Poly(vinylidene fluoride) (PVDF) polymer filled with Nickel oxide (NiO) nanosheets were prepared via the solution casting method. The […]

Electrical and mechanical characterization of a flexible conducting composite Abstract: Composite films made of poly(vinylidene fluoride) (PVDF) and conducting particles of carbon black (CB) were prepared using a hot press. Using different volume fractions of […]

XANES measurements probing the local order and electronic structure of Pb1-xBaxZr0.40Ti0.60O3 ferroelectric materials Abstract: In this study, the electronic and local structures of Pb1−xBaxZr0.40Ti0.60O3 ferroelectric ceramic samples were characterized using X-ray absorption near-edge structure (XANES) […]

Simple synthesis of Al2O3 sphere composite from hybrid process with improved thermal stability for catalytic applications Abstract: Aluminium oxide spheres were synthesized by the hybrid process applying the biopolymer chitosan. After the calcination process the […]

Growth evolution of self-textured ZnO films deposited by magnetron sputtering at low temperatures Abstract: In this work, the evolution of the surface morphology of ZnO thin films deposited by reactive RF magnetron sputtering has been […]

In silico infrared and Raman spectroscopy under pressure: The case of CaSnO3 perovskite Abstract: The CaSnO3 perovskite is investigated under geochemical pressure, up to 25 GPa, by means of periodic ab initio calculations performed at […]

Lead-free BaBi4Ti4O15 ceramics: Effect of synthesis methods on phase formation and electrical properties Abstract: The processing of ferroelectric BaBi4Ti4O15 (BBT) ceramics from powders prepared by conventional solid state reaction (SSR) and mechanochemical activation (MA) has […]

Susceptibility of multispecies biofilm to photodynamic therapy using Photodithazine (R) Abstract: This in vitro study evaluated the effect of photodynamic therapy (PDT) on the multispecies biofilm of Candida albicans, Candida glabrata, and Streptococcus mutans. Standardized fungal and bacterial suspensions […]

Waveguides and nonlinear index of refraction of borate glass doped with transition metals Abstract: The ability to write 3D waveguides by femtosecond laser micromachining and the nonlinear refractive index (n2) spectrum of a new borate […]

Blue to Yellow Photoluminescence Emission and Photocatalytic Activity of Nitrogen Doping in TiO2Powders Abstract: The defects caused by doping are important for understanding the increased photocatalytic activities of TiO2:N in organic reactions and in the […]

Oxidative Stress Status and Placental Implications in Diabetic Rats Undergoing Swimming Exercise After Embryonic Implantation Abstract: The potential benefits and risks of physical exercise on fetal development during pregnancy remain unclear. The aim was to analyze […]

Ozone and nitrogen dioxide gas sensor based on a nanostructured SrTi0.85Fe0.15O3 thin film Abstract: In this manuscript, we report an investigation into the sensitivity of two oxidizing gases (ozone and nitrogen dioxide) for nanocrystalline SrTi0.85Fe0.15O3 thin […]

New application for the BiVO4 photoanode: A photoelectroanalytical sensor for nitrite Abstract: A simple and sensitive photoelectrochemical sensor based on the bismuth vanadate (BiVO4) photoanode coupled to visible light excitation was developed for nitrite detection. The BiVO4 was prepared by hydrothermal methods and […]

Near-infrared light emission of Er3+-doped zirconium oxide thin films: An optical, structural and XPS study Abstract: This paper investigates the near-infrared emission and structural properties of Er3+-doped zirconium oxide thin films modified with a fixed […]

Nafion-titanate nanotubes composites prepared by in situ crystallization and casting for direct ethanol fuel cells Abstract: The physical properties relevant for the application of Nafion-titanate nanotubes composites in electrochemical devices such as water absorption capacity, […]