Materials Literature
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The capability of ultracapacitors in delivering high power at low temperature applications such as cold starting is the motivation of this paper. A two state equivalent electric circuit model coupled with a two state thermal model is defined and parameterized to develop a four state control oriented electro-thermal mo…
Graphene has extraordinary electronic and optoelectronic properties such as high carrier mobility, large charge-carrier concentrations, tunability via electrostatic doping, wavelength-independent absorption, and relatively low dissipation rates. The combination of its electro-optical properties with its manufacturabil…
This paper studies electrical testing of dry (un-impregnated) vacuum pressure impregnation (VPI) ground wall insulating materials and the effect of pre-VPI electrical testing on the dielectric performance of VPI insulation systems. Rotating machines manufacturers need to identify insulation system defects after coil t…
Properties of acoustic signals emitted from PD sources in solid dielectrics are less well known in comparison with those in liquids. We have investigated three materials used typically as insulation in high voltage cables and their accessories, namely, polyethylene (PE), silicon rubber (SiR) and ethylene-propylene-die…
Yarn tenacity is one of the most important properties in yarn production. This paper addresses modeling of yarn tenacity as well as optimally determining the amounts of the effective inputs to produce yarn with desired tenacity. The artificial neural network is used as a suitable structure for tenacity modeling of cot…
AgNPs were synthesized by two different methods chemically using sodium citrate as reducing agent, plant mediated by achyranthes aspera as reducing agent. Chitosan (CS) biopolymer is used as a capping agent in order to enhance the stability and dispersibility as well as to remove aggregation. The appearance of surface…
In this paper we present a hydrodynamical model for the charge and the heat transport in graphene. The macroscopic variables are moments of the electron, hole and phonon distribution functions, and their evolution equations are derived from the Boltzmann equations by integration. The system of equations is closed by m…
Abstract We report the state‐of‐art technologies of quantum‐dot light‐emitting diodes, focused on the current and power efficiencies. And our recent results on QLEDs are also added. A high‐efficiency inverted green quantum‐dot light emitting diodes (QLEDs) was demonstrated in ADRC using stacked electron transporting l…
Effects of aging on chemical structure and molecular dynamic behaviour of strained thermally active ethylene-vinyl acetate | multiwall carbon nanotube (EVA|MWCNT) composites were investigated by spectroscopy and microscopy techniques. Aged composites showed spatial inhomogeneity due to system relaxation. Inhomogeneity…
4-hydroxy-l-proline is formed by hydroxylation of proline, an amino acid found in protein, whose inhibition results in hair problems in human, causing scurvy disease.We report a theoretical study on cis and trans conformers of 4-hydroxy-lproline using first principle density functional approach at B3LYP/6-31+G(d,p) le…
The dielectric response of epoxy based nanocomposites is simulated by developing 3D models in Matlab. Two different sets of nanocomposites are simulated. In the first one, aluminum oxide is used as a filler with an average particle size of 25 nm. The second set consists of epoxy filled with hexagonal boron nitride nan…
Abstract Kitagohaite, ideally Pt7Cu, is a new mineral from the Lubero region of North Kivu, Democratic Republic of the Congo. The mineral occurs as alluvial grains that were recovered together with other Pt-rich intermetallic compounds and Au. Kitagohaite is opaque, greyish white and malleable and has a metallic lustr…
In this paper, a novel fully printed method is presented for fabrication of phase shifter devices, aiming for phased array applications. This technology offers a simple and low cost way compared to other available technologies. The proposed phase shifter contains tunable ferroelectric varactors in metal-insulator-meta…
Abstract Tangdanite, ideally Ca2Cu9(AsO4)4(SO4)0.5(OH)9·9H2O and monoclinic, is a new mineral species (IMA No. 2011-096) occurring in the Tangdan and Nanniping mines, southeast Dongchuan copper mining district, Dongchuan County, Kunming City Prefecture, Yunnan Province, P. R. China (26°11’N 103°51’E). The mineral is f…
Green synthesized silver nanoparticles from Nigella sativa essential oil were used to study the inhibitory activity against pathogenic Vibrio harveyi and Vibrio parahaemolyticus isolated from aquatic environments. Essential oil of Nigella sativa based silver nanoparticle synthesis (EONs-AgNPs) was observed using UV-vi…
Abstract Nanocomposites of multiwalled carbon nanotubes (MWCNTs) in epoxy resin and polypropylene (PP) are studied. The effect of matrix viscosity on the degree of dispersion of nanotubes is determined by rheological methods. Rheology and microwave properties are correlated to estimate the optimal limits of nanofiller…
Various types of intumescent fire retardant coatings (IFRCs) have been used to protect the substrates exposed to fire. In current study, high temperature filler Wollastonite (W) filler was used to improve fire performance of intumescent fire retardant coating. The basic ingredients of the coating were ammonium poly-ph…
We have studied the reflection and transmission spectra of multiferroics RFe3(BO3)4 (R = Pr, Nd, and Sm) at room temperature. Simulation of reflection spectra by the dispersion-analysis method have allowed us to determine the frequencies and oscillator strengths of the majority of IR active A 2 and E vibrational modes.
In this work, we describe the design space required to realize two-dimensional (2D) MoS2low-leakage MOSFETs. We combine TCAD electrostatic simulations with an analytical transport model to predict the subthreshold performance of MoS2MOSFETs. We further apply this model to a dynamic memory cell design and benchmark the…
WO3 thin films were grown by self-assembly, at 80-90 °C, on un-seeded conductive SnO2:F-glass through the method of Aqueous Chemical Growth (ACG). The thin films produced contained urchinlike microspheres of WO3, 1-2 μm thick. Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy showed these microsp…