A5028789677- Advanced Thermoelectric Materials and Devices
- Nanoparticle-Based Drug Delivery
- Extraction and Separation Processes
- Characterization and Applications of Magnetic Nanoparticles
- Nanofluid Flow and Heat Transfer
- Iron oxide chemistry and applications
- Thermal properties of materials
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Catalytic Processes in Materials Science
- Chemical and Physical Properties in Aqueous Solutions
- Heat Transfer and Optimization
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced materials and composites
- Nanomaterials for catalytic reactions
- Physics of Superconductivity and Magnetism
- Radioactive element chemistry and processing
- Advancements in Solid Oxide Fuel Cells
- Magnetic Properties and Synthesis of Ferrites
- Advanced Photocatalysis Techniques
- Ionic liquids properties and applications
- Metal Extraction and Bioleaching
- ZnO doping and properties
- Magnetic properties of thin films
- Minerals Flotation and Separation Techniques
KTH Royal Institute of Technology
2014-2025
Kaduna Polytechnic
2021
Alexandria University
2017-2020
National Agency for New Technologies, Energy and Sustainable Economic Development
2013
Zhejiang University
2011
Aalto University
2011
University of Eastern Finland
2011
Groupe de Physique des Matériaux
2011
Karolinska Institutet
2003-2010
Rutgers, The State University of New Jersey
2004-2010
Photoelectrochemical properties of nanostructured ZnO thin film electrodes have been investigated in the UV and visible regions. For films consisting 15 nm large undoped crystallites a maximum monochromatic current conversion efficiency 58% was obtained using ruthenium-based dye as sensitizer. The overall solar energy for this 2%. In comparison, sensitized 150 Al-doped yield 31% an 0.5%. study also shows that may give high efficiencies region, approaching unity films.
Magnetic nanoparticles are becoming increasingly important for several biomedical applications. For example, superparamagnetic magnetite with suitable bio-compatible coatings useful in magnetic resonance imaging, tissue engineering, and drug delivery, etc. In this study we report the synthesis of further coating these particles by types protective layers. Thermodynamic modeling chemical system has been adopted as a rational approach to establish routes better conditions pure phase magnetite....
An efficient and mature inkjet printing technology is introduced for mass production of coffee-ring-free patterns high-quality graphene at high resolution (unmarked scale bars are 100 μm). Typically, several passes a simple baking allow fabricating variety good-performance electronic devices, including transparent conductors, embedded resistors, thin film transistors, micro-supercapacitors.
Superparamagnetic iron oxide nanoparticles (SPION) with an average particle diameter of 6 nm are prepared by controlled chemical coprecipitations. Colloidal suspensions noninteracting SPION, where the surface has been modified three different types biocompatible substances, namely, starch, gold (Au), and methoxypoly(ethylene glycol) (MPEG) have fabricated via techniques. Starch-coated SPION coprecipitation in a polymeric matrix, Au-coated microemulsion method, MPEG-coated using self-assembly...
This article provides an up-to-date review on nanocomposites composed of inorganic nanoparticles and the polymer matrix for optical magnetic applications. Optical or characteristics can change upon decrease particle sizes to very small dimensions, which are, in general, major interest area nanocomposite materials. The use into provide high-performance novel materials that find applications many industrial fields. With this respect, frequently considered features are properties such as light...
Abstract The high concentration of grain boundaries provided by nanostructuring is expected to lower the thermal conductivity thermoelectric materials, which favors an increase in their figure‐of‐merit, ZT . A novel chemical alloying method has been used for synthesis nanoengineered‐skutterudite CoSb 3 powders were annealed different durations obtain a set samples with particle sizes. then compacted into pellets uniaxial pressing under various conditions and characterization. transport...
Superparamagnetic iron oxide nanoparticles (SPION) with suitable bio-compatible coatings have been used in biomedicine, particularly magnetic resonance imaging (MRI), tissue engineering, and drug delivery applications. In this study, we describe the synthesis of SPION its use for experimental in-vivo applications MRI. a mean size 6 nm prepared under inert atmosphere, polymeric starch matrix, by controlled chemical coprecipitation magnetite phase from aqueous solutions containing salts Fe2+...
Immobilization of bovine serum albumin (BSA) on surface-modified superparamagnetic iron oxide nanoparticles (SPION) has been performed by two different double-step immobilization approaches. The first approach consists preparation SPION controlled chemical coprecipitation in the presence BSA solution, whereas second includes preliminary surface modification with an amine group using a coupling agent 3-aminepropyltrimethoxysilane (APTMS). Both procedures are followed...
The magnetic properties of maghemite (γ-Fe2O3) cubic and spherical nanoparticles similar sizes have been experimentally theoretically studied. blocking temperature, TB, the depends on their shape, with ones exhibiting larger TB. Other low temperature such as saturation magnetization, coercivity, loop shift or spin canting are rather similar. experimental effective anisotropy Monte Carlo simulations indicate that different random surface two morphologies combined magnetocrystalline γ-Fe2O3 is...
We investigated the effect of spherical gold nanoparticles on immature dendritic cells (DCs). Conventionally produced had a maturating DCs--a result lipopolysaccharide (LPS) contamination. By modification production process, low-LPS particles were obtained, which practically no phenotypic maturation or cytokine DCs. Our findings emphasize importance high purity in nanoparticles, since possible contaminants may interfere with assessment biological/medical effects. They also highlight that can...
A chemical precipitation method has been used for the synthesis of ZnO nanoparticles with controlled morphology. The precursor powders were prepared using several reagents and ammonium carbamate as a precipitating reagent led to unusual rod-shape was decomposed by heating in air resulting formation spherical or rod-like shapes zinc oxide. flow injection technique developed synthesize nanophase particles products analyzed IR, SEM, XRD TGA techniques. average size obtained approximately 20 nm...
A high-performance magnetic resonance imaging T-2 contrast agent has been prepared via phase transfer of hydrophobic superparamagnetic iron oxide nanoparticles (SPIONs) to an aqueous solution by us ...
In situ sol-gel polymerization is demonstrated for fabricating transparent poly(methyl methacrylate) (PMMA)-ZnO quantum dot (QD)- hybrid materials in bulk dimension. The PMMA-ZnO QD exhibit enhanced UV-shielding effects the entire UV range, even at concentrations as low 0.02 wt %.
Bismuth telluride (Bi2Te3) is the best-known commercially used thermoelectric material in bulk form for cooling and power generation applications at ambient temperature. However, its dimensionless figure-of-merit-ZT around 1 limits large-scale industrial applications. Recent studies indicate that nanostructuring can enhance ZT while keeping of by employing an advanced synthetic process accompanied with novel consolidation techniques. Here, we report on nanostructured (NS) undoped Bi2Te3...