A5041444504- GaN-based semiconductor devices and materials
- Force Microscopy Techniques and Applications
- Ga2O3 and related materials
- Diamond and Carbon-based Materials Research
- Adhesion, Friction, and Surface Interactions
- Plasma Diagnostics and Applications
- Metal and Thin Film Mechanics
- ZnO doping and properties
- Acoustic Wave Resonator Technologies
- Molecular Junctions and Nanostructures
- Electrical Contact Performance and Analysis
- Nanowire Synthesis and Applications
- Nanopore and Nanochannel Transport Studies
- Anodic Oxide Films and Nanostructures
- High Entropy Alloys Studies
- High-Temperature Coating Behaviors
- Ion-surface interactions and analysis
- Mechanical and Optical Resonators
- Tribology and Wear Analysis
Universidade Estadual de Campinas (UNICAMP)
2019-2025
Laboratoire des Technologies de la Microélectronique
2023-2024
CEA LETI
2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2024
Institut polytechnique de Grenoble
2024
CEA Grenoble
2024
Universidade de Caxias do Sul
2017-2021
The friction phenomenon is a ubiquitous manifestation of nature. Models considering phononic, electronic, magnetic, and electrostatic interactions are invoked to explain the fundamental forces involved in phenomenon. In order establish incidence phonon prompting at nanoscale by direct contact, we study diamond spherical dome sliding on carbon thin films containing different amount deuterium hydrogen. coefficient decreases substituting hydrogen atoms. This result consistent with an energy...
In dry sliding, the coefficient of friction depends on material pair and contact conditions. If operating conditions remain unchanged, is constant. Obviously, we can tune by surface treatments, but it a nonreversible process. Here, report active control forces TiO2 thin films under UV light. It reversible stable be tuned/controlled with light wavelength. The analysis atomic force microscopy signals wavelet spectrograms reveals different mechanisms acting in darkness UV. Ab initio simulations...
Energy dissipation associated with frictional damping mechanisms owing to van der Waals (vdW) forces by induced polarizability at the sliding interface of a-C:H thin films.
In this work we report an experimental approach by combining in situ sequential top-down and bottom-up processes to induce the organization of nanosized nickel particles. The process consists xenon ion bombardment a crystalline silicon substrate generate pattern, followed depositing ∼15 nm titanium oxynitride thin film act as metallic diffusion barrier. Then, nanoparticles are deposited argon sputtering pure target, sample is annealed promote (a process). According results, surface pattern...
Lateral force microscopy (LFM) is an established technique to assess friction forces at the nanoscale. Nanoindentation followed by unidirectional sliding (NUS) also used evaluate micro/nanoscale. However, comparative studies between NUS and LFM evaluating experimental results different scales are still missing. In this work, a-C:D/H a-C:H thin films with [D]/[C] [H]/[C] contents were analyze LFM. The show that behavior assessed these two techniques in same. correlation measured depends...
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