Materials Literature
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Multilayered thin-film structures incorporating a planar junction of two molecular semiconductors, subphthalocyanine (SubPc) and iron tetrakis(1,2,5-thiadiazolo)porphyrazine (FeTTDPz) were fabricated using vacuum evaporation technique. Photovoltaic properties of such structures were tested. The open circuit voltage me…
Time-dependent drift of resistance in chalcogenide glasses leads to instabilities in phase-change random access memory (PCRAM). To reveal the origin of the resistance drift, mechanical stress relaxation and electrical resistance measurements were conducted on amorphous Ge 2 Sb 2 Te 5 thin films under the same sample c…
We show that a nematic liquid crystal confined in sinusoidal microwrinkle grooves imposing antagonistic boundary conditions exhibits noteworthy structural transitions of nematic order and associated line defects under the variation of temperature (T). The defects also show unusual temperature-dependent fluctuations wh…
Mixed oxides of 5 wt% Cu/Ti1−xZrxO2 (x = 0, 0.3, 0.5, 0.7, 1.0) were synthesized using the impregnation–urea coprecipitation method and the catalysts prepared were assessed for the selective catalyst reduction (SCR) of NO with C3H6. A significant improvement of the catalytic activity was found over the Zr-doped cataly…
Lanthanide orthovanadate erythrocyte-like EuVO4 particles were obtained via a facile, environmentally friendly hydrothermal process and were demonstrated to have an affinity for histidine (His) and the common protein BSA. Fourier transform infrared (FTIR) and Raman spectroscopy indicated an interaction between EuVO4 a…
Purpose . Biodegradable polymeric nanoparticles have been used frequently as gene delivery vehicles. The aim of this study is to modify bioadhesive PLGA nanoparticles with novel synthetic mannan‐PEG‐PE (MN‐PEG‐PE) to obtain active targeted gene delivery system. Methods . Mannan‐PEG‐PE ligands were synthesized and modi…
Extensive work has been done to explore the potential promises of plant systems in the synthesis of metal nanoparticles. Herein, a convenient and rapid process for the formation of silver nanoparticles with natural reducing and capping agents of Daucus carrota (L.) is reported. The synchronization of secondary metabol…
The present paper deals with the applicability of biological monitoring to the assessment of exposure and possible effects deriving from exposure to engineered nanomaterials (NM). After establishing a conceptual framework in which human biomonitoring should be placed, the paper reviews the critical issues related to t…
Structure and morphology of nanowires (NWs) and nanotubes (NTs) of LnO/OH (Ln = La, Ce, Sm, Er), grown by displacement reaction inside anodic alumina membranes (AAM), were investigated as function of the deposition time and electrolytic bath temperature. Depositions performed at 6°C gave only tubular morphology for al…
Porous silicon-bonded silicon carbide with tailored pore structure was prepared from silicon carbide, silicon, carbon, and boron powders as starting materials. Three different kinds of silicon particle sizes were used as pore formers, namely, fine (2.6 µm), intermediate (12.9 µm) and coarse (169.8 µm) while sintering…
Magnetic refrigeration technology needs further development not just by the improvement of magnetocaloric properties but also the optimization of the cooling system design. One of the important problems in the cooling system design is the geometry of regenerator for the efficient heat transfer between magnetic materia…
Novel in-situ reduction approach was applied for the synthesis of palladium nanoparticles in the pores of mesoporous silica materials with grafted siliconhydride groups. Matrices possessing different structural properties (MCM-41, SBA-15 and Silochrom) were used. Samples were studied by nitrogen adsorption-desorption…
Ionic liquid-facilitated mobilization and reorganization of biopolymers in natural fibrous materials is visualized by confocal fluorescent spectromicroscopy. Ionic liquid-based processes controllably fuse adjacent fibres while simultaneously leaving selected amounts of biopolymers in their native states. These process…
The corrosion behavior of water borne epoxy-ester primer coatings (10% - 50% PVCs) was evaluated through electrochemical techniques such as polarization and impedance spectroscopic (EIS) measurements. Studies were carried out for a longer duration of exposure extending up to 60 days in aqueous solution of NaCl (5%). C…
Polyaniline (Pani) and polypyrrole (Ppy) half hollow spheres with different shell thicknesses were successfully synthesized by three steps process using polystyrene (PS) as the core. The PS core was synthesized by emulsion polymerization. Aniline and pyrrole monomers were polymerized on the surface of the PS core. The…
Two fumed silicas, one hydrophilic and another hydrophobic, were added to a two-component polyurethane (PU) adhesive and their properties compared. The filled polyurethanes were characterized by thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), transmission electron microscopy (TEM), and wat…
This paper presents the results of kinetic studies of glass transition and crystallization in Se58Ge42-xPbx (x = 15, 18 & 20) glasses using differential scanning calorimetry (DSC). It has been observed that these glassy systems exhibit single glass transition and double crystallization on heating. The crystalline phas…
The unique plasmonic properties of the noble metal colloidal nanoparticles make them promising enhancement substrates for surface-enhanced Raman scattering. Obtaining of systems that provide ever-increasing enhancement of the Raman scattered light is a big challenge. Silver colloids studied here are prepared by LeeMei…
Organic-inorganic hybrid coatings have been prepared by sol-gel method of chitosan with different silanes. Silane precursors used in these coatings are glycidoxypropyltrimethoxysilane (GPTMS), Tetramethoxysilane (TEOS) and vinytrimethoxysilane (VTMS). The hybrid coatings have been evaluated by AT-FTIR and 13C-NMR anal…
The global demand for gelatin has been increasing over the years, because it has broad applications in the food, pharmaceutical, photographic, cosmetic and packaging industries. In the food industry, gelatin is used as an ingredient to enhance the elasticity, consistency and stability of food products. It is also used…