A5054456001- Advanced Sensor and Energy Harvesting Materials
- Force Microscopy Techniques and Applications
- Electrohydrodynamics and Fluid Dynamics
- Dental materials and restorations
- Photodynamic Therapy Research Studies
- Nanoplatforms for cancer theranostics
- Conducting polymers and applications
- Electrochemical Analysis and Applications
- Dental Implant Techniques and Outcomes
- Porphyrin and Phthalocyanine Chemistry
- Dielectric materials and actuators
- Adsorption and biosorption for pollutant removal
- Analytical Chemistry and Sensors
- High voltage insulation and dielectric phenomena
- Adhesion, Friction, and Surface Interactions
- Chemical and Environmental Engineering Research
- Electrowetting and Microfluidic Technologies
- Polymer Nanocomposites and Properties
- Fluid Dynamics and Heat Transfer
- Advanced Photocatalysis Techniques
- Carbon Nanotubes in Composites
- Bacterial biofilms and quorum sensing
- Supercapacitor Materials and Fabrication
- Mechanical and Optical Resonators
- Tactile and Sensory Interactions
Universidade Estadual Paulista (Unesp)
2022-2024
Universidade Federal de Santa Maria
2017-2023
Sunset Laboratory (United States)
2021
Faculty of 1000 (United States)
2021
University of North Carolina at Charlotte
2021
Universidade Estadual de Campinas (UNICAMP)
2008-2018
Pontifícia Universidade Católica de Campinas
2018
Brazilian Biosciences National Laboratory
2015
Argonne National Laboratory
2014
Hospital de Clínicas da Unicamp
2013
Tribocharged polymers display macroscopically patterned positive and negative domains, verifying the fractal geometry of electrostatic mosaics previously detected by electric probe microscopy. Excess charge on contacting polyethylene (PE) polytetrafluoroethylene (PTFE) follows triboelectric series but with one caveat: net is arithmetic sum charges, as opposed to usual assumption uniform opposite signal charging each surface. Extraction n-hexane preferentially removes charges from PTFE, while...
Mechanochemical reactions during polymer friction or contact produce ionic fragments distributed on positive and negative domains at both surfaces.
Friction between dielectric surfaces produces patterns of fixed, stable electric charges that in turn contribute electrostatic components to surface interactions the contacting solids. The literature presents a wealth information on electronic contributions friction metals and semiconductors but effect triboelectricity coefficients dielectrics is as yet poorly defined understood. In this work, were measured tribocharged polytetrafluoroethylene (PTFE), using three different techniques. As...
N-Trimethyl chitosan (TMC), an antibacterial agent, and heparin (HP), antiadhesive biopolymer, were alternately deposited on modified polystyrene films, as substrates, to built multilayer films. The properties of the films investigated by Fourier transform infrared spectroscopy, atomic force microscopy, scanning electron Kelvin microscopy. In vitro studies controlled release HP evaluated in simulated intestinal fluid gastric fluid. initial adhesion test E. coli surface showed effective...
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...
Converting humidity into useful electrical energy was only recently demonstrated and the improvements presented in this work are not highly efficient, but also contributes to development of scalable, real-world applications.
In this manuscript, we report, for the first time, photoinactivation evaluation of tetra-cationic porphyrins with peripheral Pt (II)-bpy complexes in photodynamic inactivation (PDI) rapidly growing mycobacterial strains (RGM). Two different isomeric (II)-porphyrins were synthetized and applied. PDI experiments Mycobacteroides abscessus subsp. Abscessus (ATCC 19977), Mycolicibacterium fortuitum 6841), Massiliense 48898), smegmatis 700084) conducted adequate concentration (without aggregation)...
Abstract Friction and triboelectrification of materials show a strong correlation during sliding contacts. force fluctuations are always accompanied by two tribocharging events at metal–insulator [e.g., polytetrafluoroethylene (PTFE)] interfaces: injection charged species from the metal into PTFE followed flow charges to surface. Adhesion maps that were obtained atomic microscopy (AFM) region contact increases pull‐off 10 150 nN, reflecting on resilient electrostatic adhesion between...
Shaking graphite powder dispersed in an aqueous alkaline cellulose solution produces stable dispersions of hydrophilic, thin sheets with lateral dimensions reaching many micrometers. The X-ray diffractogram and Raman spectrum the exfoliated differ from well-known patterns. Analytical transmission electron micrographs show bound to surface lamellae this is confirmed by scanning probe micrographs. dispersant properties dissolved are assigned its adsorption on juxtaposition hydrophobic planes...