Materials Literature
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Abstract Properties of both amorphous and polycrystal films of azodye AD‐1 have been investigated. The films' structure depends on conditions of thermal treatment, light polarization and intensity. High dichroic ratio (>20) has been obtained. Film structure control allows fabrication of good photoaligning coatings.
In this article, silver-polyethylene oxide (Ag/PEO) biocompatible nanocomposite (BCNC) were successfully green synthesized by mixture containing low MW PEO, silver nitrate and by UV-irradiation at room temperature. The initially broad and asymmetric surface plasmon resonance (SPR) band was narrowed and blue-shifted as…
Mesoporous photocatalysts of CeO2/SBA-15 are prepared by two methods of direct synthesis as solvent-usage and solvent-free methods. In solvent-usage method, CeO2/SBA-15 is synthesized in acidic media. While, in solvent-free method, CeO2/SBA-15, has been prepared through the novel path of directly grind cerium salt int…
Induction motors are widely applied in industry. Their performance strongly depends on relative power supply quality, such as voltage sags, harmonics, voltage unbalance and voltage fluctuations. This paper investigates the impact of voltage fluctuations on induction motor performance, particularly the stator and rotor…
Graphene as a material has created a lot of interest due to properties like high saturation velocity, high current carrying capacity, ambipolar characteristics and high transconductance. These properties make graphene based transistors a promising candidate for high frequency applications. Recently, there have been de…
In the study of the solution-solid phase equilibrium in CuX 2 -S-H 2 O system (X = Cl, Br, S = dimethyl sulfoxide, N , N -dimethylformamide, tetrahydrofuran, 1,4-dioxane) at 25°C we established the effect of the solvent properties and the type of the halide ligand (dielectric premeability, donor number, hydrophobicity…
Using sodium tungstate and cesium carbonate as raw materials, cesium tungsten bronze (CsxWO3) powders were synthesized by low temperature hydrothermal reaction with citric acid as the reducing agent. The CsxWO3 films were prepared on glass using polyvinyl alcohol solution as dispersing agent. The microstructure and mo…
Abstract The effect of annealing treatments and thermomechanical cycling on the transformation behaviors and shape memory effect of Ti 48.5 Ni 48 Fe 2 Nb 1.5 shape memory alloys were investigated using electrical resistivity measurement and tensile testing. It is found that the transformation behaviors are influenced…
Relaxors with general formula AA'BB'O 3 with different cationic distributions at A/B-sites have important device applications in capacitors, piezoelectric ultrasonic transducers, electrostrictive actuators, SAW substrates, etc. The doping or compositional changes in these ceramics can control the high electromechanica…
The strength of the electron-phonon interaction is most straightforwardly determined from electron energy relaxation times, provided that an appropriate relaxation scheme is assumed. We use literature data from fs spectroscopy on materials with different strengths of electron-phonon interaction to show that the common…
A mechanical measurement technique was investigated to correlate the degree of cross-linking in laminated ethylene vinyl acetate (EVA) solar module encapsulation with the cured EVA shear response by means of a dynamic mechanical analysis (DMA) measurement. The technique was demonstrated on sample disks fabricated with…
The zirconia-doped mullite gel fibers were prepared via a sol–gel method. The thermal behaviors of the gel fibers during pyrolysis were investigated by means of thermal gravity-differential scanning calorimetry (TG-DSC), in-situ fourier transform infrared spectroscopy (in-situ FTIR), X-ray diffraction (XRD) and transm…
This paper evaluates dielectric breakdown measurements according to the ASTM D149-09 standard for various specimen thicknesses and surrounding media. This study was performed on LLDPE/nanoclay with three different surrounding media. Pre-breakdown partial discharge activity was monitored and the electrical field in the…
The electrical properties of the metal-insulator-metal (MIM) structure with a monolayer of Al 2 O 3 or ZrO 2 spherical nanoparticles as an insulator have been investigated. It has been experimentally found that the MIM structure can be in a weakly conducting or highly conducting state, depending on the applied voltage…
Results of comprehensive, detailed studies of the magnetic and resistive properties of the nanocompound p-La0.8Mn1.04O3.5 at temperatures of 4.2–300 K in magnetic fields up to 9 T are reported. These studies of the temperature, field, and frequency dependences of the magnetization and susceptibility indicate that, bel…
We investigate the stability of ZnSe/ZnS core/shell quantum dots (QDs) based on density-functional-theory (DFT) calculations combined with photoluminescence (PL) and x-ray photoelectron (XPS) spectroscopy of as-synthesized and annealed QDs. The results demonstrate that core/shell interfaces in ZnSe/ZnS QDs are thermod…
This study reports on the tensile and tearing strength of natural rubber latex (NRL) high strength coated fabrics. Plain woven Kevlar 29 fabrics were coated with pre-vulcanised NRL using single-dip, double-dip and triple-dip coating methods. The force needed to break and tear the uncoated and NRL coated fabrics were d…
Sm0.5Ca0.5MnO3 thermochromic thin films were synthesized using dc reactive magnetron co-sputtering and subsequent annealing in air. The film structure was studied by x-ray diffraction analysis. To validate the thermochromic potentiality of Sm0.5Ca0.5MnO3, electrical resistivity and infrared transmittance spectra were…
Abstract Reverse micelles (RM) were formed in heptane/CHCl 3 with a surfactant carrying the triallylammonium (=triprop‐2‐en‐1‐ylammonium) head group ( Scheme ). Photo‐cross‐linking with dithiothreitol (= rel ‐(2 R ,3 R )‐1,4‐dimercaptobutane‐2,3‐diol; DTT) captured the RMs and afforded organic, soluble nanoparticles i…
Purpose The purpose of this paper is to fabricate colorless cotton fabrics with good antibacterial activity and durability. Design/methodology/approach Chitosan (CS) based silver nanoparticles (AgNPs) were formed in CS solutions as the antibacterial agent. The reducing agent was sodium borohyride. The concentrations o…