A5069366577- Solid-state spectroscopy and crystallography
- Crystal Structures and Properties
- Nonlinear Optical Materials Research
- Chalcogenide Semiconductor Thin Films
- Crystallization and Solubility Studies
- Advanced Semiconductor Detectors and Materials
- Crystallography and molecular interactions
- Quantum Dots Synthesis And Properties
- Dental materials and restorations
- Semiconductor materials and interfaces
- Atomic and Molecular Physics
- Crystal structures of chemical compounds
- Chemical and Physical Properties in Aqueous Solutions
- Mass Spectrometry Techniques and Applications
- Inorganic Fluorides and Related Compounds
- Bone Tissue Engineering Materials
- TiO2 Photocatalysis and Solar Cells
- Polyoxometalates: Synthesis and Applications
- Chemical Thermodynamics and Molecular Structure
- Semiconductor Quantum Structures and Devices
- Electrohydrodynamics and Fluid Dynamics
Brazilian Center for Research in Energy and Materials
2023
Centro de Desenvolvimento da Tecnologia Nuclear
2022
Universidade Federal de Minas Gerais
2020-2021
Universidade Federal de Juiz de Fora
2017-2020
Universidade Federal de Viçosa
2019
Samples of the empirical formula K2+Nix2+Co1−x2+SO42⋅6H2O were grown with a partial occupation cations Co and Ni. Mixed crystals good optical quality obtained by slow evaporation growth method. In decomposition process, these suffer mass loss approximately 24%, equivalent to water molecules forming octahedral coordination ions Ni Co. The characteristics measured where transmittance reached more than 80% in wavelength range 190–390 nm. By Raman spectroscopy, vibrational modes SO42−, H2O...
We have obtained a set of crystals the empirical formula (NH4)2NixCo(1−x)(SO4)2 · 6H2O with different concentrations Ni and Co, by employing growth from solution technique. chosen monocrystal (NH4)2Ni0.3Co0.7(SO4)2 for structural analysis. The structure was resolved x-ray diffraction method refined full-matrix least-squares help SHELXS software. This crystal belongs to monoclinic space group P21/c parameters, = 6.2455 (2) Å, b 12.5065 (3) c 9.2303 α γ 90°, β 106.995 (3)°, V 689.49 Å3, Z 2....
A study of the electronic conduction mechanisms and electrically active defects in polycrystalline Sb2Se3 is presented. It shown that for temperatures above 200 K, electrical transport dominated by thermal emission free holes, ionized from shallow acceptors, over intergrain potential barriers. In this temperature range, dependence mobility limited barriers, main contributor to observed activation energy conductivity 485 meV. However, at lower temperatures, nearest-neighbor Mott variable...
Our work presents a comparative study of morphological characteristics and the osteogenic potential MC3T3-E1 cells on different modified surfaces titanium: nanostructured TiO2 with 20 100 nm nanotube diameter, sandblasting acid etching, commercially known as SLA. Nanostructured TiO2surface was prepared by anodizing titanium plates, while SLA surface provided commercial supplier. Surfaces were characterized SEM, EDS, AFM, water contact angle measurements. In order to evaluate cell response,in...
In this work, we synthesized and studied the spectroscopic properties of (NH4)2(SO4)2Y(H2O)6 (Y = Ni, Mg) crystals doped with AgNO3 or H3BO3. These constitute a series hexahydrated salts known as Tutton salts. We investigated influence dopants on vibrational modes tetrahedral ligands NH4 SO4, octahedral complexes Mg(H2O)6 Ni(H2O)6, H2O molecules present in these through Raman infrared spectroscopies. were able to identify bands that are attributed presence Ag B dopants, well band shifts...
Earth abundant antimony selenide (Sb2Se3) is a promising material for the thin-film photovoltaic applications due to their desirable optoelectronic properties. In this work, we present comprehensive study on structural and surface properties of Sb2Se3 thin-films potential in solar cells. The samples were grown Si (100) substrate at different temperatures using RF magnetron sputtering. XRD diffractogram exhibits that predominant phase, whereas TEM measurements confirms nanocrystalline nature...