A5022067789- Metal and Thin Film Mechanics
- Bone Tissue Engineering Materials
- Titanium Alloys Microstructure and Properties
- Orthopaedic implants and arthroplasty
- Magnesium Alloys: Properties and Applications
- Advanced materials and composites
- Diamond and Carbon-based Materials Research
- High Entropy Alloys Studies
- Dental materials and restorations
- TiO2 Photocatalysis and Solar Cells
- Nanoparticles: synthesis and applications
- Corrosion Behavior and Inhibition
- Advanced Photocatalysis Techniques
- Laser Material Processing Techniques
- Aluminum Alloys Composites Properties
- Lubricants and Their Additives
- Semiconductor materials and devices
- High-Temperature Coating Behaviors
- Optical Coatings and Gratings
- Nanomaterials and Printing Technologies
- Facial Trauma and Fracture Management
- Laser and Thermal Forming Techniques
- Thermal properties of materials
- Antimicrobial agents and applications
- Silicone and Siloxane Chemistry
National Institute of Research and Development for Optoelectronics
2016-2025
University of Bucharest
2015-2018
Universitatea Națională de Știință și Tehnologie Politehnica București
2016
Abstract Properties of the hydroxyapatite obtained by electrochemical assisted deposition (ED) are dependent on several factors including temperature, electrolyte pH and concentrations, applied potential. All these directly influence morphology, stoichiometry, crystallinity, behaviour, particularly coating thickness. Coating structure together with surface micro- nano-scale topography significantly early stages implant bio-integration. The aim this study is to analyse effect modification...
In the current study, we have examined possibility to improve biocompatibility of (TiZrNbTaHf)C through replacement either Ti or Ta by Si. The coatings were deposited on Si and 316L stainless steel substrates magnetron sputtering in an Ar+CH4 mixed atmosphere for elemental composition, chemical bonds, surface topography, electrical charge biocompatible characteristics. net was evaluated at nano macroscopic scale measuring potential work function, respectively. tests comprised determination...
Daily exposure to contaminated environments and surfaces leads serious health issues, increasing healthcare costs. Active materials that act against pathogens can effectively prevent their proliferation contribute increased protection infections. In this contribution, nanostructured thin films containing silver are investigated, using SiO2 TiO2 as transparent matrices embed the Ag atoms. The were obtained via magnetron sputtering, HiPIMS for deposition RF sputtering oxides, in either an Ar...
Hydroxyapatite (HAP) coatings are applied on metallic implant materials to combine mechanical properties of material with bioactivity abilities HAP ceramic. In this study, additions Si and Mg proposed be deposited Ti6Al4V substrates by RF magnetron sputtering. Chemical bonding, morphology, topography corrosion resistance in simulated body fluids (SBF) the were investigated. Additionally, biological evaluated. It was found that addition does not influence formation a phase. All exhibited...
Multiple antibiotic resistance has now become a major obstacle to the treatment of infectious diseases. In this context, application nanotechnology in medicine is promising alternative for prevention infections with multidrug-resistant germs. The use silver as powerful antibacterial agent attracted much interest. TiO2 and SiO2 thin films enhanced Ag particles have been developed aim maintaining transparency polymer films. Antibacterial activity was evaluated Gram-negative species-Escherichia...
The reactive cathodic arc deposition technique was used to produce Ti nitride and oxynitride coatings on 304 stainless steel substrates (SS). Both mono (SS/TiN, SS/TiNO) bilayer (SS/TiN/TiNO SS/TiNO/TiN) were investigated in terms of elemental phase composition, microstructure, grain size, morphology, roughness. corrosion behavior a solution consisting 0.10 M NaCl + 1.96 H2O2 evaluated, aiming for biomedical applications. results showed that the compact, homogeneously deposited substrate,...
Titanium alloys are preferred metals as implant materials due to their advantageous combination of low density and high biocompatibility. However, the augmentation surfaces with calcium-based coatings becomes essential regulate corrosion rates enhance osteoconductive properties material. In this study, titanium alloys, specifically Ti6Al4V, underwent a transformative process wherein they were coated calcium phosphate (CaP) ceramics doped zinc (Zn) via micro-arc oxidation (MAO) technique,...
Considering the requirements of medical implantable devices, it is pointed out that biomaterials should play a more sophisticated, longer-term role in customization and optimization material–tissue interface order to ensure best long-term clinical outcomes. The aim this contribution was assess performance silicon carbide–hydroxyapatite various simulated biological fluids (Dulbecco’s modified Eagle’s medium (DMEM), body fluid (SBF), phosphate buffer solution (PBS)) through immersion assays...
The use of thin metallic layers at the thickness limit where transparency or spectral selectivity are achieved is gaining increased interest. cheap and abundant materials desirable in attempt to avoid environment economical costs. Cu as a replacement for Ag heat reflector one solutions that can be employed. stability over time known issue, copper being prone atmospheric oxidation degradation. In this contribution, obtained by magnetron sputtering investigated, using both DC HiPIMS processes...
The presence and detection of persistent pharmaceutical pollutants (PPPs) in aquatic environments requires urgent remediation. C-N-TiO2 was prepared by sol-gel method immobilised on Ti mesh dip-coating technique followed pyrolysis the furnace at 350°C for 105 minutes. Ti/C-N-TiO2 photocatalyst were characterised SEM, EDS, XRD, Raman spectroscopy, XPS. An optimised DCDBD system alone or combined with catalysts compared degradation sulfamethoxazole (SMX) simulated wastewater applied...
The increasing occurrence of infections caused by pathogens found on objects everyday use requires a variety solutions for active disinfection. Using materials that do not require daily maintenance has potential advantage their acceptance. In this contribution, transparent films, with silver as the main antimicrobial agent and total thickness few tens nm, were deposited flexible self-adhesive polymer foils used screen protectors. TiO2 SiO2 matrix to embed Ag nanoparticles, ensuring also...
The present study aims to explain the corrosion and tribocorrosion performance in simulated conditions of human body by level stress, adhesion coating substrate, roughness, hardness. coatings were synthesized cathodic arc evaporation method on 316L stainless steel substrates be used for load bearing implants. Structure, elemental, phase compositions studied means energy dispersive spectrometry X-ray diffraction, respectively. grain size strain determined Williamson–Hall plot method. Tests...
Zr-based nitrides and oxynitrides were deposited by reactive cathodic arc evaporation in monolayer double-layer structures with the aim of increasing corrosion protection 304L stainless steel (SS) a biomedical aggressive environment. All coatings had total thickness 1.2 µm. Compared to bare substrate, surface roughness coated samples was higher, presence microdroplets being revealed scanning electron micrography (SEM). The X-ray diffraction investigation ZrN phases that peaks shifted towards...