A5047955070- Magnetic properties of thin films
- Magnetic Properties and Synthesis of Ferrites
- ZnO doping and properties
- High-pressure geophysics and materials
- Gas Sensing Nanomaterials and Sensors
- Anodic Oxide Films and Nanostructures
- Magnetic Properties of Alloys
- Metallic Glasses and Amorphous Alloys
- Magnetic Properties and Applications
- Iron oxide chemistry and applications
- Advanced Cellulose Research Studies
- Copper-based nanomaterials and applications
- Nanomaterials for catalytic reactions
- Advanced Machining and Optimization Techniques
- Nonlinear Optical Materials Research
- Smart Materials for Construction
- Botanical Research and Applications
- Pigment Synthesis and Properties
- Geomagnetism and Paleomagnetism Studies
- Multiferroics and related materials
- Metallurgical Processes and Thermodynamics
- Nuclear materials and radiation effects
- Nanoporous metals and alloys
- Nanocomposite Films for Food Packaging
- Electronic and Structural Properties of Oxides
University of Buenos Aires
2014-2024
Consejo Nacional de Investigaciones Científicas y Técnicas
2014-2024
Hospital Fernández
2015
Instituto de Desarrollo Tecnológico para la Industria Química
2012
Crystalline cellulose nanofibers are obtained from the bark of Cereus Forbesii, a cactus native to arid areas South America. The obtaining was carried out in several steps: pretreatment raw material, elimination hemicellulose and lignin obtain cellulose, an acid hydrolysis crystalline nanofibers. have crystallinity index 82% nanofiber diameter 18 nm. An average crystallite size 6 nm calculated for domains that form high makes sample very homogeneous decomposes relatively narrow temperature...
The pressure-induced structural evolution of Ca2SnO4, Sr2SnO4, and Zn2SnO4 has been characterized by powder X-ray diffraction up to 20 GPa using the ALBA synchrotron radiation source density functional theory calculations. No phase transition was observed in Ca2SnO4 investigated pressure range. observation solves contradictions existing literature. In contrast, a Sr2SnO4 at 9.09 GPa. as from ambient-condition tetragonal polymorph (space group I4/mmm) low-temperature P42/ncm). linear...
Low-cost 2D cupric oxide nanoleaves (CuO NLs) are straightforwardly synthesized at room temperature by precipitation varying the addition method of alkali. No further treatments necessary to obtain high purity NLs. The effect different methods alkali on morphological, structural, vibrational, and optical properties is studied field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) ultraviolet–visible (UV–vis) spectroscopies. NLs grown...
A straightforward method for the synthesis of CoFe2.7/CoFe2O4 core/shell nanowires is described. The proposed starts with a conventional pulsed electrodeposition procedure on alumina nanoporous template. obtained CoFe2.7 are released from template and allowed to oxidize at room conditions over several weeks. effects partial oxidation structural magnetic properties were studied by x-ray spectrometry, magnetometry, scanning transmission electron microscopy. results indicate that final composed...
The influence of Nb doping was studied on ribbons nominal composition Nd <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">y</sub> Fe xmlns:xlink="http://www.w3.org/1999/xlink">86-x-y</sub> B xmlns:xlink="http://www.w3.org/1999/xlink">14</sub> xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> (y = 7, 8; x 0, 2, 4). alloys were prepared by melt-spinning and then annealed at 973 K for 20 minutes. magnetic characterization revealed that niobium...
Se estudiaron las características morfológicas del proceso de ensanchamiento poros en películas alúmina (Al2O3) nanoporosa. El montaje experimental involucra un set-up bajo costo que utiliza aluminio comercial. procedimiento comprende una serie pretratamientos, doble anodizado, y finaliza con la inmersión nanoestructura porosa inicialmente fabricada, solución acuosa ácido sulfúrico durante diferentes intervalos tiempo, conduce a poros. estudió morfología muestras obtenidas por microscopia...
Co-doped SnO2 nanocrystals with tetragonal rutile-type (space group P42/mnm) structure have been investigated using in-situ high-pressure synchrotron angle dis-persive X-ray diffraction till 20.9 GPa at ambient temperature. The analysis of ex-perimental results based on Rietveld refinements suggest that un-dergoes a structural phase transition 14.2 to an orthorhombic CaCl2-type Pnnm) no coexistence during the transition. No further is observed GPa. low-pressure and phases are related via...
Nanoparticles of V-doped SnO 2 with stoichiometry Sn 1-x O V x (x=0.05,0.075, 0.125) have been synthesized by a co-precipitation method.Their structural, vibrational, and nuclear properties characterized x-ray Diffraction, Transmission Electron Microscopy, Energy Dispersive Spectroscopy, Raman Mössbauer Spectroscopy (with 119 probe) at ambient pressure.We also performed high-pressure synchrotron diffraction experiments.The structural behaviour was studied up to ∼10 GPa under...
In this work, we present a comparative study of the structural and hyperfine parameters on tin dioxide nanoparticles doped with different transition metal elements. The nanopowders stoichiometry Sn0.95M0.05O2 (M: V, Mn, Fe, Co) were synthesized by simple co-precipitation method. characterization was carried out conventional x-ray diffraction technique, transmission 119Sn Mössbauer spectroscopy photoelectron (XPS). effect dopant element and, particularly, Sn analysed. It found that dopants,...
A very simple method of synthesis goethite, α-FeOOH, nanowire is reported. To fabricate the nanowires, an anodized alumina nanoporous template (AAO) used. AAO has pores with average diameter 60 nm. The based on a self-combustion reaction chemical precursor (Fe(NO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> ) saturated solution) which occurs inside nanopores. geometry determines morphology nanowires and confinement conditions in heat...
RESUMEN Se describe un método simple y barato para la fabricación de moldes alúmina nanoporosa, con potenciales aplicaciones nanohilos. utiliza como materia prima aluminio grado comercial. Los nanoporosos fabricados tienen diámetro promedio poros (20 ± 4) nm. El proceso consta dos etapas anodizado. detallan ambas anodizado se caracteriza el material que obtiene resultado cada una ellas. obtenidos pasos distribución más estrecha tamaño poros, mejor circularidad orden espacial. En dichos...
CoFe <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> films were deposited on Si [(100) or (111)] substrates by pulsed laser deposition, varying substrate temperature and deposition time. All showed highly (111)-preferred orientation. Magnetic measurements (hysteresis loops) at room indicated that the have in-plane magnetic anisotropy. By atomic force microscopy, surface topology...
Co-doped SnO2 nanocrystals (with a particle size of 10 nm) with tetragonal rutile-type (space group P42/mnm) structure have been investigated for their use in situ high-pressure synchrotron angle dispersive powder X-ray diffraction up to 20.9 GPa and at an ambient temperature. An analysis experimental results based on Rietveld refinements suggests that undergoes structural phase transition 14.2 orthorhombic CaCl2-type Pnnm), no coexistence during the transition. No further is observed until...