RSS 1.0Artigos - Física - FC
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Fast synthesis of NaNbO3 nanoparticles with high photocatalytic activity for degradation of organic dyes
; ; ; ; ; ; Graeff, Carlos F. O.
; (Journal of the American Ceramic Society, 2022) [Artigo]
NaNbO3 nanoparticles were obtained using the microwave-assisted hydrothermal method followed by heat treatment. It has been shown that heat treatment to increase the crystallinity of the material and modifies particle ... -
Development of non-equiatomic Bio-HEAs based on TiZrNbTa-(Mo and Mn)
Torrento, Jhuliene Elen; Sousa, Tiago Dos Santos Pereira De ; Cristino Da Cruz, Nilson ; Santos De Almeida, Gerson ; Zambuzzi, Willian Fernando ; Grandini, Carlos Roberto ; (APL Materials, 2022) [Artigo]
This study produced non-equiatomic TiNbZrTaMn and TiNbZrTaMo high entropy alloy (HEAs) by argon arc-melting and heat-treated for microstructural homogenization. The phase composition, microstructure, and selected mechanical ... -
Experimental assessment of low-temperature martensite transformations in Ni-rich polycrystalline Ni-Ti alloys
; ; ; ; ; Grandini, Carlos Roberto; ; (Journal of Materials Research and Technology, 2022) [Artigo]
Ultrasonic velocity and attenuation measurements of a commercially available Ni-rich polycrystalline Ni-Ti alloy were simultaneously obtained upon cooling from room temperature (RT) down to 130 K. The anelastic spectra ... -
The role of Nb2O5deposition process on perovskite solar cells
Fernandes, Silvia L.; Garcia, Larissa De O. ; Júnior, Roberto De A. Ramos ; Affonço, Lucas J. ; ; ; Pontes, Fenelon M. ; Da Silva, José H. D. ; Graeff, Carlos F. O. (Journal of Renewable and Sustainable Energy, 2022) [Artigo]
Two different methods are used to deposit Nb2O5 as compact electron transport layers in n-i-p double cation mixed-halide perovskite Cs0.17FA0.83Pb(I0.83Br0.17)3 solar cells: reactive sputtering and spin coating. These ... -
Longevity of bonded composite restorations after dentin biomodification with neolignans obtained from Nectandra leucantha
; ; Graeff, Carlos Frederico de Oliveira; ; ; (Brazilian Dental Science, 2022) [Artigo]
Objective: This in vitro study evaluated the effect of neolignan-containing solutions on dentin biomodification previously applied to the bonding procedure in adhesive restorations. Material and Methods: Neolignans, ... -
Preparation and characterization of novel as-cast Ti-Mo-Nb alloys for biomedical applications
Cardoso, Giovana Collombaro; de Almeida, Gerson Santos ; Corrêa, Dante Oliver Guim ; Zambuzzi, Willian Fernando ; ; Correa, Diego Rafael Nespeque ; Grandini, Carlos Roberto (Scientific Reports, 2022) [Artigo]
Ti and its alloys are the most used metallic biomaterials devices due to their excellent combination of chemical and mechanical properties, biocompatibility, and non-toxicity to the human body. However, the current alloys ... -
Eumelanin-based multisensory platform: A case of study for photolithographic patterning
; ; ; ; Bregadiolli, Bruna A.; Graeff, Carlos F.O. ; Bufon, Carlos C.B. (Applied Materials Today, 2022) [Artigo]
Eumelanin, the most abundant brown-black pigment found in humans, is an ideal candidate for bioelectronics and eco-design technologies due to its biocompatibility, biodegradability, and hydration-dependent conductivity. ... -
Effect of Thermomechanical Treatments on Microstructure, Phase Composition, Vickers Microhardness, and Young’s Modulus of Ti-xNb-5Mo Alloys for Biomedical Applications
Cardoso, Giovana Collombaro; ; Correa, Diego Rafael Nespeque ; Grandini, Carlos Roberto (Metals, 2022) [Artigo]
The development of new β-Ti alloys has been extensively studied in the medical field in recent times due to their more suitable mechanical properties, such as a relatively low Young’s modulus. This paper analyzes the ... -
Bronsted Acid Mediated Facile Greener Multicomponent Synthesis of 2,4-Diaryl-quinoline Derivatives in Water
Martins, Lucas Michelão; Moreno, Vitor Fernandes ; Rosário, Ilana Sganzerla ; Graeff, Carlos Frederico de Oliveira ; Filho, Luiz Carlos da Silva (Orbital, 2022) [Artigo]
Quinolines are an important class of natural and synthetic products, with several biological activity and applications in medicine and electronics. In this work we present a greener method of synthesis of 2,4-diaryl-quinoline ... -
Effectiveness of Experimental Whitening Toothpastes Containing Colorants on the Optical Properties of Enamel
; Frederico De Oliveira Graeff, Carlos; ; D'Alpino, Paulo Henrique Perlatti (Scientific World Journal, 2022) [Artigo]
Objective. This in vitro study investigated the whitening potential of experimental toothpastes containing optical colorants in their formulations in comparison with commercial products. The chemical and physical characteristics ... -
Reactive sputtering deposition of Co3O4 films and an evaluation of its use as an electrochemical sensor for ascorbic acid
Azevedo Neto, Nilton Francelosi; Angelico, João C. ; da Silva Pelissari, Marcelo R. ; ; Simões, Rafael Plana ; ; Dias da Silva, José Humberto (Journal of Materials Science: Materials in Electronics, 2022) [Artigo]
Co3O4 films have been deposited using reactive DC magnetron sputtering onto fluorine-doped tin oxide (FTO) and fused silica (SiO2). X-ray diffraction measurements confirmed the spinel Co3O4 phase. The surface roughness of ... -
Soliton motion in skyrmion chains: Stabilization and guidance by nanoengineered pinning
Vizarim, N. P.; Souza, J. C. Bellizotti ; ; ; ; Venegas, P. A. (Physical Review B, 2022) [Artigo]
Using a particle-based model we examine the depinning motion of solitons in skyrmion chains in quasi-one-dimensional (1D) and two-dimensional (2D) systems containing embedded 1D interfaces. The solitons take the form of a ... -
Mechanical properties assessment of a 3D printed composite under torsional and perpendicular stress
; Gerlin Neto, Vicente; Piedade, Lucas Pereira ; Massa, Renan Cesar ; Pintão, Carlos Alberto ; Foschini, Cesar Renato ; (Rapid Prototyping Journal, 2022) [Artigo]
Purpose: This paper aims to evaluate the resin infiltration influence on the mechanical properties of components 3D printed by the material extrusion-based additive manufacturing (AM), also known as fused deposition modeling ... -
Torsion modulus with CaCO3 fillers in unsaturated polyester resin - mechanical spectroscopy
Pintao, Carlos Alberto Fonzar; Baggio, Airton ; Piedade, Lucas Pereira ; Sanchez, Luiz Eduardo de Angelo ; Goncalves, Gilberto de Magalhaes Bento (Polimeros-ciencia E Tecnologia, 2022) [Artigo]
This work presents an alternative to studying and determining the torsion modulus, G, in composites. For this purpose, we use a measuring system with a rotation motion sensor coupled with a torsion pendulum that allows for ... -
Avaliação do Modelo WRF para Aplicação de um índice de Previsão de Geada na Região Sul do Brasil
Bussoni, Caio Vinicius Alves; Moreira, Demerval Soares ; (Revista Brasileira de Meteorologia, 2022) [Artigo]
Understanding the formation processes, as well as the predictability of frosts, is of paramount importance to avoid socioeconomic damage, especially in regions that are prone to the occurrence of the phenomenon, such as ... -
Energy distribution of secondary electrons from gold on teflon-FEP
Pintão, Carlos Alberto Fonzar (IEEE Transactions on Dielectrics and Electrical Insulation, 2016) [Artigo]
This paper presents results of the spectrum of energy of secondary electrons for the energies of perpendicularly incident electrons of 0.4 keV, 2.0 keV, or 3.5 keV in a gold surface deposited on a substratum of Teflon-FEP. ... -
Plasma electrolytic oxidation up to four-steps performed on niobium and Nb-Ti alloys
; ; ; ; ; Kuroda, Pedro Akira Bazaglia; Grandini, Carlos Roberto ; (Surface and Coatings Technology, 2022) [Artigo]
Plasma electrolytic oxidation (PEO) of up to four steps were performed on Niobium (Nb), and binary Niobium-Titanium alloys (Nbx-Ti, x = 50%, 90 wt.%), and the resulting oxidized surfaces were compared to their respective ... -
The Influence of Thermomechanical Treatments on the Structure, Microstructure, and Mechanical Properties of Ti-5Mn-Mo Alloys
Lourenço, Mariana Luna; Pontes, Fenelon Martinho Lima ; Grandini, Carlos Roberto (Metals, 2022) [Artigo]
With the increase in the world’s population, the rising number of traffic accidents, and the increase in life expectancy, the need for implants, dental work, and orthopedics is growing ever larger. Researchers are working ... -
Effect of temperature on thermal oxidation behavior of biomedical Ti-Zr-Mo alloys
; Grandini, C. R.; ; Proença, J. P. ; Sottovia, L. ; Cruz, N. C. ; Rangel, E. C. ; (Journal of Alloys and Compounds, 2022) [Artigo]
In this study, the effect of temperature on the morphology, crystal structure, chemical composition, roughness, wettability, Vickers microhardness, and corrosion resistance of thermally oxidized Ti-15Zr-xMo (x = 0, 5, 10, ... -
Synthesis and characterization of self-organized TiO2 nanotubes grown on Ti-15Zr alloy surface to enhance cell response
Konatu, R. T.; Domingues, D. D. ; Escada, A. L.A. ; ; ; Nakazato, R. Z. ; ; Grandini, C. R. ; Alves Claro, A. P.R. (Surfaces and Interfaces, 2021) [Artigo]
In recent years, studies have been shown that the presence of TiO2 nanotubes on the titanium alloy surfaces could induce the enhancement of the cell adhesion on the titanium alloys surface. In the present study, the cell ...