A5026377816- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Transition Metal Oxide Nanomaterials
- Magnetic Properties and Synthesis of Ferrites
- Iron oxide chemistry and applications
- Copper-based nanomaterials and applications
- Nanoparticle-Based Drug Delivery
- Characterization and Applications of Magnetic Nanoparticles
- Electronic and Structural Properties of Oxides
- Multiferroics and related materials
- Catalytic Processes in Materials Science
- Luminescence Properties of Advanced Materials
- Magnetic and transport properties of perovskites and related materials
- Advanced Photocatalysis Techniques
- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Magneto-Optical Properties and Applications
- Metallic Glasses and Amorphous Alloys
- Advanced Condensed Matter Physics
- Perovskite Materials and Applications
- Ga2O3 and related materials
- Magnetic properties of thin films
- Laser-Ablation Synthesis of Nanoparticles
- Hydrogels: synthesis, properties, applications
- Ginkgo biloba and Cashew Applications
Universidade de Brasília
2015-2024
Pontifical Catholic University of Peru
2024
Universidad Nacional de San Agustin de Arequipa
2017-2023
Universidade Paulista
2023
Universidade Católica de Brasília
2023
Universidade de São Paulo
2023
Universidade Federal de São Carlos
2023
Population Council
2021
Instituto de Física La Plata
2020
Centro de Desenvolvimento da Tecnologia Nuclear
2015-2016
Abstract Ni‐doped SnO 2 nanoparticles, promising for gas‐sensing applications, have been synthesized by a polymer precursor method. X‐ray diffraction (XRD) and transmission electron microscopy (TEM) data analyses indicate the exclusive formation of nanosized particles with rutile‐type phase (tetragonal ) Ni contents below 10 mol%. The mean crystallite size shows progressive reduction content. Room‐temperature Raman spectra nanoparticles show presence active modes activated effects. From...
In the present study, we report on successful synthesis of Pr-doped SnO2 (SnO2:Pr) nanoparticles using a polymeric precursor method while setting Pr-content in range from 0 to 10.0 mol %. The as-prepared samples were characterized regard their structural, morphological and surface properties. X-ray diffraction (XRD) patterns recorded all revealed tetragonal rutile-type structure with systematic average size reduction (in 11 4 nm) enhancing residual strain 0.186 0.480%) as was increased. From...
In this study, we report on the structural and hyperfine properties of Al-doped SnO2 nanoparticles synthesized by a polymer precursor method. The x-ray diffraction data analysis carried out using Rietveld refinement method shows formation only rutile-type structures in all samples, with decreasing mean crystallite size as Al content. A systematic study unit cell, well vicinity interstitial position show strong evidence two doping regimes structure SnO2. Below 7.5 mol% dominant substitutional...
When Fe-ions enter into the ZnO NPs, their oxidation state can be tuned and excitonic peak enlarges, indicating that lattice becomes more disordered. The AFM interactions found in paramagnetic NPs become stronger as Fe content increases.
Ni-doped SnO2 nanoparticles prepared by a polymer precursor method have been characterized structurally and magnetically. Ni doping (up to 10 mol%) does not significantly affect the crystalline structure of SnO2, but stabilizes smaller particles as content is increased. A notable solid solution regime up ∼ 3 mol% Ni, surface enrichment for higher contents are found. The room temperature ferromagnetism with saturation magnetization (MS) 1.2 × (- 3) emu g 1) coercive field (HC) 40 Oe...
A successful hexagonal Cu2S p-type semiconductor thin film using DC magnetron sputtering is reported. Films with thickness gradients were deposited by taking advantage of deposition geometry and target dimensions. X-ray diffraction (XRD) analysis confirmed the exclusive formation phase. Elemental composition dependence sample position determined energy-dispersive x-ray spectroscopy. Optical properties, including optical bandgap, refractive index, extinction coefficient, assessed modeling...
Tuning the physical properties of Cu-doped SnO 2 NPs to potential use as self-cleaning surfaces.
In this study the structural, magnetic and surface characterization of Fe-doped SnO2 nanopowders synthesized by a polymer precursor method is presented. The x-ray diffraction (XRD) data analysis shows formation rutile-type structure for all samples. For Fe-content up to 5.0 mol% lattice constants unit cell volume values suggest substitutional solution Fe3+- Sn4+-ions in matrix likely generation oxygen vacancies account charge compensation. Above entrance Fe3+-ions into interstitial sites...
The present study reports the successful synthesis of Sn1–xCrxO2 nanoparticles with doping content (x) ranging from 0 to 0.20. Samples were synthesized by a polymer precursor method using SnCl2·H2O and Cr(NO3)3·5H2O as metal ion suppliers. In all samples X-ray diffraction data show one single-phase formation (rutile-type), crystalline size (crystal strain) decreasing (increasing) monotonically while increasing x content, which are assigned substitutional solution Cr Sn ions in structure....
Abstract This study investigates the fabrication process of copper thin films via thermal evaporation, with precise control over film thickness achieved through Z -position adjustment. Analysis as-fabricated reveals a discernible relationship between grain size (〈 D 〉) and -position, characterized by phenomenological equation <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo stretchy="false">〈</mml:mo> <mml:mi>D</mml:mi> <mml:msubsup>...
A polymer precursor method has been used to synthesize Ni-doped SnO2 nanoparticles. X-ray diffraction (XRD) data analyses indicate the exclusive formation of nanosized particles with rutile-type phase (tetragonal SnO2) for Ni contents below 10 mol%. In this concentration range, particle sizes decrease increasing content and a bulk solid solution limit was determined at ~ 1 surface enrichment is present concentrations higher than limit. Only above mol% Ni, second NiO-related determined....
In this work, we report on a single-pot synthesis route based polymeric precursor method used for successfully producing undoped and iron-doped CeO2 nanoparticles with iron contents up to 10.0 mol. %. The formation of high-crystalline cubic fluorite structure is determined all the studied samples. Meanwhile, magnetic measurements ceria revealed occurrence ferromagnetism bound polarons fraction Ce3+ at room temperature, only paramagnetic behavior Fe3+ ions was Fe-doped nanoparticles. A...
In this work, we present a coupled experimental and theoretical first-principles investigation on one of the more promising oxide-diluted magnetic semiconductors, Sn1-xCoxO2 nanoparticle system, in order to see effect cobalt doping physical chemical properties. Our findings suggest that progressive surface enrichment with dopant ions plays an essential role monotonous quenching disorder modes. That weakening is associated passivation oxygen vacancies as Co excess at becomes larger....