A5070656548- Ion-surface interactions and analysis
- Polymer Nanocomposite Synthesis and Irradiation
- Anodic Oxide Films and Nanostructures
- Diamond and Carbon-based Materials Research
- Smart Materials for Construction
- Advanced Memory and Neural Computing
- Surface Modification and Superhydrophobicity
- Advanced Cellulose Research Studies
- Polydiacetylene-based materials and applications
- Education and Digital Technologies
- Concrete Corrosion and Durability
- Corrosion Behavior and Inhibition
- Conducting polymers and applications
- Comparative Animal Anatomy Studies
- Polymer Nanocomposites and Properties
- Titanium Alloys Microstructure and Properties
- Science and Education Research
- Aluminum Alloys Composites Properties
- Microstructure and mechanical properties
- Optical Coatings and Gratings
- Graphite, nuclear technology, radiation studies
- Natural Fiber Reinforced Composites
- Fusion materials and technologies
- Chemistry Education and Research
- Bauxite Residue and Utilization
Universidade Federal de São Carlos
2014-2024
Universidade de Sorocaba
2017-2023
Universidade de São Paulo
2007-2011
GSI Helmholtz Centre for Heavy Ion Research
2011
Universidade Cidade de São Paulo
2007
Universidade Federal de São Paulo
2007
Cellulose is a polymer widely available in nature, however its applications may be restrict due to hydrophilic character. The creation of hierarchical structures on the surface one required factors obtain hydrophobicity this material. In order compare morphological and chemical effects caused by action different gases nanostructures cellulose surface, samples were exposed oxygen (O2) sulfur hexafluoride (SF6) plasma treatments. changes morphology after treatment prove that both able create...
Paleometry is a promising research field that brings together different areas, such as physics and chemistry, applied to paleobiological issues. In spite of being recognized abroad, it new in Brazil. The most important characteristic the application mostly non-destructive techniques study fossils. This work compiles some paleometrical applications geological contexts, synthesis hard skeleton Corumbella werneri, geochemical aspects about fresh water bivalves from Bauru Group exceptional...
A new target station providing Fourier transform infrared (FT-IR) spectroscopy and residual gas analysis (RGA) for in situ observation of ion-induced changes polymers has been installed at the GSI Helmholtz Centre Heavy Ion Research. The installations as well first measurements room temperature are presented here. foil polyimide Kapton HN(®) was irradiated with 1.1 GeV Au ions. During irradiation several FT-IR spectra were recorded. Simultaneously outgassing degradation products detected...
In this study, 6061 Al alloy was galvanostatically anodized under the Plasma Electrolytic Oxidation (PEO) condition. A factorial design of 22 carried out using two variables (anodization time and presence silver in electrolyte) on levels, i.e., 20 60 min anodization absence/presence ions electrolyte. The performed sodium silicate electrolyte, applying a constant current density mA cm−2. oxide characterization by Scanning Electron Microscopy (SEM), surface roughness analysis (RMS), Energy...
An overview is given about the strategies to create a novel 'Swift-heavy Ion Track Electronics (SITE)' and an 'Electrolytic with Etched Tracks (E3T)', by combining swift heavy ion tracks in thin insulating membranes conventional semiconductor-based electronic skills eventually also nanoparticles on one hand, electrolytes other hand. In this way, multiparametric multilevel ambient-sensing decision-making elements can be constructed which offer range of unusual properties. The most interesting...
Specific electronic features have been found in structures consisting of metal oxide layers on silicon substrates upon swift heavy ion irradiation. These are linked to the appearance radiation-induced negative differential resistances structures. In reversed bias direction they show high frequency current pulsations at around ∼10kHz frequency. Their amplitude increases with increasing applied voltage. The pulsation also shows a small increase. depends fluence and flux.
During the extraction of aluminum from bauxite, a waste oxides containing traces heavy metals in highly alkaline matrix, called Red Mud (RM), is produced. In this study RM characterized and feasibility using it as precursor for production thin films by Plasma Sputtering Immersion Ion Implantation Deposition (PIIID) demonstrated. The chemical structure composition, surface morphology, topography, wettability prepared such methodologies were investigated. consist mainly elements aluminum,...
Plasma Electrolytic Oxidation (PEO) is promising for the processing of biomaterials because it enables production surfaces with adjustable composition and structure. In this work, aimed at improvement bioactivity titanium, PEO has been used to grow calcium phosphide coatings on titanium substrates. The effects addition magnesium acetate electrolytes produced during 120 s Ti disks using bipolar voltage pulses solutions acetates sodium glycerophosphate as have studied. Scanning electron...
Resumo Este trabalho apresenta a elaboração e aplicação de um jogo tabuleiro didático, como uma atividade revisão, envolvendo conceitos física relacionados ao cotidiano dos alunos. A pesquisa foi aplicada para 51 estudantes do terceiro ano ensino médio, no final primeiro semestre. metodologia destaca importância se empregar o lúdico na exploração das habilidades argumentação relação social que, normalmente, não são contempladas em aula tradicional. Observou-se progresso nas relações entre os...
The combination of ultraviolet (UV) light and oxygen has a detrimental effect on various materials. In polymers, this interaction can result in irreversible changes the material's color gloss, as well decline its strength flexibility. Changes mechanical properties are primary cause crack formation due to chain splitting, impacting both device's performance. such cases, total or partial replacement product is necessary prevent operational interruptions accidents. use visual colorimetric...