Materials Literature
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Silver flakes/polyurethane composites have been reported as promising materials for stretchable conductors that can be easily fabricated by wet spinning or printing and yet have low electrical resistance. However, it is also important to control the effects of strain on electrical resistance: for example, stable elect…
Gelatin/hyaluronic acid (Gel/HA) scaffolds were prepared by using the freeze-drying method after crosslinking with 1-ethyl-(3-3-dimethylaminopropyl) carbodiimide (EDC). The porous structure was characterized by scanning electron microscopy (SEM), and the wettability of Gel/HA film was also studied by measuring their c…
Transformer diagnosis methods have been introduced and employed to recognize transformer internal defects since many years ago. In terms of mechanical defects in transformers, turn to turn and disc to disc short circuits in transformer windings are considered as one of the main problems in transformer active part. On…
Abstract A new type of supported photosensitizer derived from renewable wool and Rose Bengal is described. The novel sensitizer could efficiently promote the photooxygenation of furan derivatives to the corresponding 5-hydroxy-2-(5H)-furanone in excellent yields, via singlet oxygen, using visible light as the energy s…
This work provides an investigation on the slot embedded patch configurations to be used as elements for the active reflectarray design. Rectangular slots have been introduced in the centre of the rectangular patch elements designed in the X-band frequency range. Waveguide scattering parameter measurements has been pe…
The paper investigates three types of transfer function methods for detecting displacements of winding in a model transformer. To acquire these transfer functions, the measuring method of input voltage, current and its response is used in impulse method. The applied impulse voltages had three rising times, which were…
IR spectroscopy and viscometry data have shown that poly(acrylic acid) and poly(methacrylic acid) form complexes with agar-agar in aqueous solutions as they do with other polysaccharides. The polyacid-agar-agar complexes are typical hydrogels. The swelling index of hydrogels based on the poly(methacrylic acid)-agar-ag…
A three-dimensional (3-D) transient model has been developed to investigate plasma deformation driven by a magnetic field and its influence on arc stability in a circuit breaker. The 3-D distribution of electric current density is obtained from a current continuity equation along with the generalized Ohm's law; while…
We report on the thermionic field emission and charge transport properties of gold nitride nanodomains grown by pulsed laser deposition with a molecular fluorine laser at 157 nm. The nanodomains are sandwiched between the metallic tip of a conductive atomic force microscope and a thin gold layer forming thus a metal-s…
Titanium oxide nanocrystals synthesized by the Pechini method were calcinated at temperatures between 300 and 1000 degrees C. The crystalline structure was analysed by X-ray diffraction, scanning electron microscopy (SEM) and Raman spectroscopy. A phase transition from the anatase to rutile crystalline phase was found…
The present research is devoted to the problem of extraction grid choice for a single-grid source of bipolar ion-electron flow. The paper contains detailed reference information on ion and electron extraction characteristics of 10 different grids with broad range of parameters: aperture width (0.09-0.6 mm), grid trans…
Application of new materials offers more sensitive, selective and long-term stable sensor materials. The aim of the present work is to compare gas response to acetone of nanostructured sol-gel auto-combustion derived stoichiometric and excess-iron cubic spinel type nickel-zinc ferrite (Ni0.3Zn0.7Fe2+zO4 where z = 0 an…
A novel semi-interpenetrating network (semi-IPNs) hydrogel, composed of acrylamide (AAm) with itaconic acid (ITA) as co-monomer, with poly (ethylene glycol)(PEG) and trimethylolpropane triacrylate (TMPTA) was prepared. Hydrogels and semi-IPNs were synthesized by free radical solution polymerization. Swelling experimen…
A 1D metal-organic framework with two symmetry-independent heptacoordinated MnII atoms stitched by centrosymmetric octamer water clusters is reported.
Terahertz technology is considered a viable option for medical imaging, since many biological and chemical agents exhibit signatures in this spectral domain. Ultimately, large biomolecules and protein strands will be accessible, enabled by the coupling of THz science with near-field probes. In this paper, we present t…
The antiradical activity of 5-amino-6-methyluracil in the initiated radical-chain oxidation of 1,4-dioxane as a model system was studied quantitatively. The rate constant k 7 of its reaction with the peroxyl radical of 1,4-dioxane was measured to be (5.6 ± 1.8) × 105 L mol−1 s−1 at 333 K. The effect of the methyl subs…
Solid solutions of α-Cr2O3 and α-Fe2O3 are novel oxide semiconductors exhibiting narrower band gaps than those of the end members. We have investigated the heteroepitaxial growth and crystalline structure of pulsed-laser deposited α-(Cr x Fe1-x )2O3 films on c-plane sapphire substrates. Under the growth condition opti…
We have investigated the fabrication of polycrystalline thin films of a liquid crystalline benzothienobenzothiophene derivative, i.e., 2-octylthienyl-benzothienobenzothiophene having a highly ordered smectic liquid crystal phase (SmE), the thermal stability of the films, and the performance of their field effect trans…
A functionalized graphene sheet (FGS), which was prepared by the thermal reduction of graphite oxide, was modified by oxidation with H2O2. Elemental analysis, X-ray photoelectron spectroscopy, and Fourier transform infrared (FTIR) spectroscopy showed that additional oxygen functional groups, either doubly or singly bo…
Neurons are electrically excitable cells that transmit and process information in the nervous system. Recently, the differentiation of human neural stem cells to neurons has been shown to be enhanced on graphene substrates, and differentiated neurons have been shown to be able to still carry electrical signals when st…