A5034910987- Characterization and Applications of Magnetic Nanoparticles
- Electrochemical sensors and biosensors
- Conducting polymers and applications
- Hydrogels: synthesis, properties, applications
- Nanoparticle-Based Drug Delivery
- Thermography and Photoacoustic Techniques
- biodegradable polymer synthesis and properties
- Polymer Nanocomposites and Properties
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Micro and Nano Robotics
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Advanced Thermoelectric Materials and Devices
- Nanofluid Flow and Heat Transfer
- Iron oxide chemistry and applications
- Transition Metal Oxide Nanomaterials
- Material Properties and Applications
- Phase Change Materials Research
- Nanomaterials for catalytic reactions
- Electrospun Nanofibers in Biomedical Applications
- Advanced Mathematical Theories and Applications
- Shape Memory Alloy Transformations
- Phosphorus and nutrient management
- Nanoplatforms for cancer theranostics
- Vibration Control and Rheological Fluids
National Institute for Research and Development of Isotopic and Molecular Technologies
2014-2025
Romanian Academy
2010
Polytechnic University of Timişoara
2010
For specific applications in the field of high gradient magnetic separation biomaterials, nanoparticle clusters controlled size and moment an external are particular interest. We report synthesis characterization microgels designed for purposes, as well efficiency obtained microgel particles. High magnetization with superparamagnetic behaviour were a two-step procedure by miniemulsion technique using highly stable ferrofluid on volatile nonpolar carrier. Spherical closely packed hydrophobic...
Magnetite (Fe3O4) and ferrite (MFe2O4, M = Mn, Zn) hydrophobic magnetic nanoparticles with various shapes sizes were synthesized by high-temperature reaction of organic precursor solutions. Spherical, cubic, hexagonal, octahedral ranging from 10 to 100 nm obtained. It has been proven that the reported high capability tailoring shape size surface-coated allows controlling a variety properties are relevant many potential applications. Structurally well-formed saturation magnetization values...
Our research aims to determine the optical properties of binary composites based on TiO2 and SiO2 oxides combined with additional metal such as CuO SrO. The inclusion SrO together nanoparticles is driven by their ability introduce intermediate energy levels in forbidden band, acting electron traps that reduce recombination rate increase efficiency solar conversion. Morphological structural characterization materials was carried out evidence homogeneity final composite well high specific...
The synthesis and characterization of hybrid structures obtained by coating Fe3O4 magnetic nanoparticles from water based nanofluid with a polypyrrole (PPy) layer are reported. thin amorphous surrounding the crystalline core was observed HRTEM. FTIR spectra nanocomposites show that absorption bands characteristic for pyrrole ring vibrations significantly shifted to lower frequencies in nanocomposite spectra, which indicates higher degree oxidation PPy shell covering magnetite as compared...
Abstract The graft polymerization of ε‐caprolactone (ε‐CL) onto magnetite was carried out under microwave irradiation in the presence tin(II) 2‐ethylhexanoate. molar ratio ε‐CL to 2‐ethylhexanoate 300, whereas 5. chemical structures obtained poly(ε‐caprolactone) coated magnetic nanoparticles were characterized by FTIR and XPS spectroscopy. These magnetic‐polymer hybrid nanostructures further investigated X‐ray diffraction magnetization measurements. morphology core‐shell determined TEM. ©...
Dental adhesives are used in a wide range of applications, including to place direct composite restorations frontal or posterior teeth. One the most frequent causes for failure resin is microleakages. The first aim this work introduce new type self-etched dental adhesive doped with magnetic nanoparticles (MPs) synthetized laboratory. scope produce minimized width/thickness decrease risk second assess layer all characteristic areas teeth using both less precise but common optical microscopy...
Drug therapy for vascular disease has been promoted to inhibit angiogenesis in atherosclerotic plaques and prevent restenosis following surgical intervention. This paper investigates the arterial depositions distribution of PEG-functionalized magnetic nanocomposite clusters (PEG_MNCs) local delivery a stented artery model uniform field produced by regionally positioned external permanent magnet; also, PEG_MNCs aggregation or chain formation around implanted stent. The central concept is...
High magnetization Fe3O4/OA-FeCo/Al2O3 nanocomposite magnetic clusters have been obtained using a modified oil-in-water miniemulsion method. These dispersed in ferrofluid carrier result magnetorheological fluid with improved characteristics. The core consisting of mixture magnetite nanoparticles about 6 nm average size, stabilized oleic acid (Fe3O4/OA) and FeCo/Al2O3 particles 50 compactly packed the form spherical diameter distribution range 100-300 hydrophilic coating sodium lauryl...
Novel magnetic core-shell iron oxide nanoparticles, covered by polypyrrole which is functionalized covalent attachment of glycyl-leucine or bovine serum albumin were synthesized using N-hydroxysuccinimide as activating reagent.The morphology the nanoparticles was investigated DLS and HRTEM, showing a coreshell structure.The structures based on FTIR spectroscopy X-ray diffraction properties determined magnetization measurements.
The in vivo distribution of 50 nm clusters polyethylene glycol-conjugated superparamagnetic iron oxide nanoparticles (SPIONs-PEG) was conducted this study. SPIONs-PEG were synthesized de novo, and their structure paramagnetic behaviors analyzed by specific methods (TEM, DLS, XRD, VSM). Wistar rats treated with 10 mg Fe/kg body weight organs blood examined at two intervals for short-term (15, 30, 60, 180 min) long-term (6, 12, 24 h) exposure evaluation. Most exposed investigated through light...
In general, magnetic nanoparticles are not often used in dental applications due to some limitations of these materials, such as aggregation problems and low mechanical chemical resistance but also esthetic their black color. Our research presents the synthesis novel composite materials based on nanoparticles, functionalized properly coated overcome using applications. The composites were prepared a preparation flow containing several integrated reaction steps previously sequentially. An...
We report the synthesis and characterization of magnetic nanogels based on magnetite nanoparticles sterically stabilized by double layer oleic acid in water carrier chemically cross linked poly (N-isopropylacril amide) (pNIPA) (acrylic acid) (pAAc). In this structure are attached to flexible network chain adhesive forces, resulting a direct coupling between elastic properties. Stable suspensions dual responsive temperature-responsive N-isopropyl acryl amide, pH acrylic were obtained. The...
Abstract Carbon paste electrodes modified with a phenoxazine derivative, Meldola blue, and phenothiazine methylene green, both strongly adsorbed on synthetic zeolite were investigated using either glassy carbon powder (Sigradur K, SK) or single‐walled nanotubes (SWCNT) as conductive electrode material. In the case of SWCNT based electrodes, formal potential mediators was pH dependent, expected for redox process involving proton transfer. contrast, SK practically insensitive to pH. This...
Shape memory alloys, especially ferromagnetic shape are interesting new materials for the manufacturing of stents. Iron-palladium alloys in particular can be used to manufacture self-expanding temporary stents due their optimum rate degradation, which is between that magnesium and pure iron, two metals commonly stent research. In order avoid blood clotting upon introduction stent, they often coated with anticoagulants. this study, sulfated pectin, a heparin mimetic, was synthesized different...
Temperature – sensitive poly (N-isopropyl acrylamide) pNIPA gels were synthesized with nano size iron oxide ferrofluids (Fe3O4) using N, N'-methylene bis-acrylamide (BIS) as the crosslinking agent, obtaining a new type of material, named ferrogel. The swelling characteristics these ferrogels at distinct compositions, function temperature investigated. It was found that demonstrated responsive nature, and it also showed good reversibility. FTIR spectra ferrogel samples, absorption region...
In this work we report the synthesis of hybrid magnetic core-shell nanostructure with inorganic core consisting magnetite surface-functionalized by glycolic acid or serine. For attachment polymer chain on preformed functionalized applied "grafting-from" strategy, where polymerization is initiated directly from particles surface to give a high number end attached chains. The ROP ε-caprolactone and lactic was common catalysts, tin (II) 2-ethylhexanoate (Sn(oct)2) produced poly(ε-caprolactone),...