A5027642795- Advanced Sensor and Energy Harvesting Materials
- Dielectric materials and actuators
- Conducting polymers and applications
- Analytical chemistry methods development
- Bacterial biofilms and quorum sensing
- Vibration Control and Rheological Fluids
- Supercapacitor Materials and Fabrication
- Dental materials and restorations
- Force Microscopy Techniques and Applications
- Innovative Energy Harvesting Technologies
- Dental Implant Techniques and Outcomes
- Adsorption and biosorption for pollutant removal
- Electrochemical sensors and biosensors
- Advanced materials and composites
- Analytical Chemistry and Sensors
- Bacillus and Francisella bacterial research
- Bacteriophages and microbial interactions
Universidade Federal de Santa Maria
2021-2023
University of North Carolina at Charlotte
2021
Triboelectric nanogenerators (TENGs) are efficient systems that convert mechanical energy to electrical energy. Based on contact electrification, an emerging powerful tool in harvesting technologies, most TENGs constructed using expensive materials (e.g. gold and platinum) costly processes. Aseptic carton packages (ACP) plastic-laminated basically composed of paperboard, polyethylene aluminum, but having all parts required for a TENG device: dielectric inductor metal. Using the concept...
A particular kind of triboelectrification is found during the flow liquids through tubes. Here, we have used Faraday cups and Kelvin probes to investigate charge aqueous solutions alcohols flowing a polytetrafluorethylene tube. An excess positive charges was observed in all collected by cup after flow. While tube displays small potential flow, likely due electrokinetic effects, very high negative completion Aqueous with pH variation showed significant differences accumulation only at 2.93...
This work describes the development of flexoelectric devices based on low-cost rubber parts with simple constructions. Flexoelectricity produces fast charging in a phase strain that can be used both force sensing and energy harvesting technologies. The transducer high effectiveness accuracy was built using only flexible non-metal graphite-based electrode sandwiched by two vulcanized parts, displaying linear relationship between gradient electric response. Also, mechanical-to-electrical...
Non-contact electrostatic measurements were used to the characterization of flexoelectric potentials in dielectrics under tensile, compressive, and flexural loads. Kelvin probes are capable detect localized potential gradients on stretched natural latex that would hardly be detected at macroscopic scale using standard methods for characterization. The high deformability rubbers tensile (or compressive) loads or fully folded states during tests is a really challenging task attached compliant...
The recent discovery of electromechanical coupling in elastomers showed periodic electrification phase with rubber stretching but following different electrostatic potential patterns. In this work, a Kelvin electrode monitored silicone and natural for extended periods until the tubing underwent rupture. electric follows regular, quasi-sinusoidal patterns at beginning during whole run, except when close to fatigue failure, changing into complex waveforms. attractors on latex become chaotic...
In this study, B. cereus was detected in dialysis fluids within international parameters (ultrapure - maximum limit of 0.1 CFU/mL for heterotrophic bacteria count) by analyzing the pellet obtained through centrifugation method. We also investigated ability isolate to form a biofilm at different temperatures, production virulence factors, and susceptibility commercial antimicrobial agents. This study demonstrated high persist hemodialysis system, which can be explained its broad produce 25...