A5007833462- Diamond and Carbon-based Materials Research
- Plasma Diagnostics and Applications
- Metal and Thin Film Mechanics
- Plasma Applications and Diagnostics
- Surface Modification and Superhydrophobicity
- Semiconductor materials and devices
- Graphene research and applications
- Carbon Nanotubes in Composites
- Laser-induced spectroscopy and plasma
- Electrohydrodynamics and Fluid Dynamics
- Membrane Separation Technologies
- Advanced Sensor and Energy Harvesting Materials
- Fuel Cells and Related Materials
- Nanoparticles: synthesis and applications
- Fusion materials and technologies
- Graphene and Nanomaterials Applications
- Electronic and Structural Properties of Oxides
- nanoparticles nucleation surface interactions
- ZnO doping and properties
- Membrane Separation and Gas Transport
- Conducting polymers and applications
- Supercapacitor Materials and Fabrication
- Gas Sensing Nanomaterials and Sensors
- Analytical Chemistry and Sensors
- Laser-Ablation Synthesis of Nanoparticles
National Institute for Laser Plasma and Radiation Physics
2016-2025
University of Bucharest
2015-2024
Mihail Kogălniceanu University
2020
Plasma Technology (United States)
2019
Ghent University
2015
Plasma (Russia)
2010
KTH Royal Institute of Technology
2007
National Institute for Research and Development in Microtechnologies
2004
Institutul de Fizică Atomică
1997
Eindhoven University of Technology
1994
A short description of approaches for carbon nanostructures synthesis is made and the advantages using plasma during growth are presented. As a particular example based technique we detail process downstream nanowall (CNW) by radiofrequency expanding beam. The combines magnetron sputtering catalyst deposition enhanced chemical vapor (main gas: argon, active hydrogen, precursor acetylene) in single reactor. analysis focuses on correlation between material properties characteristics measured...
In this work, a new eco-friendly method for the treatment of poly(3-hydroxybutyrate) (PHB) as candidate food packaging applications is proposed. Poly(3-hydroxybutyrate) was modified by bacterial cellulose nanofibers (BC) using melt compounding technique and plasma or zinc oxide (ZnO) nanoparticle coating better properties antibacterial activity. Plasma preserved thermal stability, crystallinity melting behavior PHB‒BC nanocomposites, regardless amount BC nanofibers. However, remarkable...
Submerged liquid plasma (SLP) is a new and promising method to modify powder materials. Up now, this technique has been mostly applied carbonaceous materials, however, SLP shows great potential as low-cost environmental-friendly cellulose. In work we demonstrate the modification of microcrystalline cellulose (MCC) by applying combined with ultrasonication treatments. The generated either in an inert (argon) or reactive (argon: oxygen argon:nitrogen) gas was used MCC dispersions water...
We have developed an innovative thin-film nanocomposite membrane that contains cellulose acetate (CA) with small amounts of TiO2-decorated graphene oxide (GO) (ranging from 0.5 wt.% to 2 wt.%) sandwiched between two polytetrafluoroethylene (PTFE)-like thin films. The PTFE-like films succeeded in maintaining the bulk porosity support while increasing thermal and chemical robustness boosting catalytic activity TiO2 nanoparticles. membranes exhibited a specific composition bonding, predominant...
The potential of nanostructured carbon materials to mediate the interaction with biological cells is explored herein. Carbon layers nano- and micro-roughness, consisting interconnected nanowalls, vertically oriented on a substrate, were synthesized oxidized silicon by radio-frequency plasma jet assisted chemical vapour deposition. functionalized plasmas generated in argon admixed ammonia or nitrogen. treatments preserved surface's nano-micro features, but have incorporated oxygen nitrogen...
Tailoring the surface properties of nanocellulose to improve compatibility components in polymer nanocomposites is great interest. In this work, dispersions water and acetonitrile were functionalized by submerged plasmas, with aim increasing quality reinforcing agent biopolymer composite materials. Both morphology chemistry influenced application a plasma torch filamentary jet liquid suspension nanocellulose. Depending on type source gas mixture was modified incorporation oxygen nitrogen...
Polyvinylpyrrolidone-coated silver nanoparticles (PVP-AgNPs) dispersed in ethanol, water and water/alginate were used to functionalize untreated dielectric barrier discharge (DBD) plasma-treated polyamide 6,6 fabric (PA66). The PVP-AgNPs dispersions deposited onto PA66 by spray exhaustion methods. method showed a higher amount of AgNPs. Water water-alginate presented similar results. Ethanol amphiphilic character more affinity AgNPs fabric, allowing better uniform surface distribution...
Abstract We report the remote growth of carbon nanowalls in a plasma beam sustained by an expanding argon radiofrequency discharge and injected with small amount acetylene presence hydrogen as active gas. The process was investigated varying mass flow rates, ratio nature gases (argon, ammonia/hydrogen, acetylene), substrate temperature, power. Scanning transmission electron microscopy, Raman spectroscopy, diffraction methods were used for investigation deposited material. found that although...
Abstract Carbon nanowalls (CNWs) functionalization allows the tailoring of some their properties after they have been synthesized. Herewith we report on post‐synthesis CNWs by plasma treatments. Radiofrequency plasmas generated in hydrogen, oxygen, nitrogen, tetrafluoroethane, and sulfur hexafluoride admixed to argon, were used. The changes morphology, structure, chemical composition determined SEM, FTIR, Raman Spectroscopy, specifically for each gas mixture. results point out surface...
Using plasma in conjunction with fluorinated compounds is widely encountered material processing. We discuss several techniques for surface fluorination: deposition of fluorocarbon thin films either by magnetron sputtering polytetrafluoroethylene targets, or plasma-assisted chemical vapor using tetrafluoroethane as a precursor, and modification carbon nanowalls treatment sulphur hexafluoride environment. showed that conformal can be obtained and, according to the initial properties,...
In this study, a low concentration (10 μg·mL−1) of poly(N-vinylpyrrolidone) (PVP)-coated silver nanoparticles (AgNPs) were deposited by spray and exhaustion (30, 70 100 °C) methods onto untreated dielectric barrier discharge (DBD) plasma-treated polyamide 6,6 (PA66) fabric. DBD samples showed higher AgNP deposition than ones for all methods. After five washing cycles, only displayed AgNPs on the fabric surface. The best-performing method was at 30 °C, which exhibited less agglomeration best...
Although the origin and possible mechanisms for green yellow emission from different zinc oxide (ZnO) forms have been extensively investigated, same red/orange PL ZnO nanorods (nR) remains largely unaddressed. In this work, vertically aligned arrays (ZnO nR) were produced using hydrothermal process followed by plasma treatment in argon/sulfur hexafluoride (Ar/SF6) gas mixture time. The annealed samples highly crystalline with ~45 nm crystallite size, (002) preferred orientation, a relatively...