Materials Literature
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The physical properties of amorphous In–Ga–Zn–O (a-IGZO) films deposited by DC sputtering under various sputtering pressures were investigated. The sputtering pressure was found to influence various physical properties. Lower sputtering pressures resulted in film densification and decreased both surface roughness and…
The paper presents mechanical properties of materials used as matrices in diamond impregnated tools. Several powder metallurgy materials were manufactured by the hot press process from various combinations of cobalt (Co SMS, Co Extrafine, Co 400mesh), carbonyl iron (Fe CN) and tungsten (WP30) powders. After consolidat…
Novel microfluidic valves based on the solid–solid phase transition of a thermally responsive shape-memory polymer (SMP) have been developed. Both normally open and normally closed valves were constructed and satisfactory performances were obtained, such as an actuation time of 108 ms, a minimum necessary power of 65…
A graphene modified electrode for voltammetric determination of concentrations of aluminium (III) in the presence of alizarin has been reported. The modified electrode was characterized by cyclic voltammetry (CV), transmission electron microscopy (TEM), infrared spectrum (FT-IR) and alternating current (AC) impedance…
Investigations have been carried out on laser‐beam‐induced nanoparticle (NP) formation in thin (5 nm) Au and Ag films on indium–tin‐oxide substrate. After the irradiation the films were observed to break‐up into NPs through a dewetting mechanism. This mechanism was investigated as a Rayleigh‐instability‐driven process…
Following the recent work of decomposing the total dipole moment and polarizability of a homogeneous system into site-specific contributions, we extend the study to the heterogeneous systems of iron-doped Sin (n = 1-14) clusters by introducing a weighting function. The structure-∕shape- and size-specific aspects of th…
Polylactic-co-glycolic acid (PLGA) 50:50 and Eudragit RS 100 nanoparticles entrapping glipizide along with excipients were prepared using single emulsion solvent evaporation method. The objective was to develop single oral dose glipizide nano particles for reducing blood sugar level in diabetes induced experimental an…
Thermal oxidation of a Ge(100) surface was investigated by using spectroscopic ellipsometry (SE) and x-ray photoelectron spectroscopy (XPS). Ge oxide was grown in the temperature range of 375 to 550°C in dry-O 2 ambience at atmospheric pressure. Although the Ge-oxide growth rate shows a linear relationship in a log-lo…
Electricity generation from the readily biodegradable organic substrate (glucose) accompanied by decolorization of azo dye was investigated using a two-chamber microbial fuel cell (MFC). Batch experiments were conducted to study the effect of dye and substrate concentration on MFC performance. Electricity generation w…
A full three-dimensional, single phase model of a proton exchange membrane fuel cell (PEMFC) has been developed. A single set of conservation equations developed and numerically solved using a finite volume based computational fluid dynamics technique. In present investigation some parameters such as transport phenome…
Abstract We report chemical vapor phase polymerization (VPP) deposition of poly(3,4-ethylenedioxythiophene) (PEDOT) and PEDOT/graphene on porous dielectric tantalum pentoxide (Ta2O5) surface as cathode films for solid tantalum electrolyte capacitors. The modified oxidant/oxidant-graphene films were first deposited on…
Transformers are the most vital components in power system. The common dielectrics used in transformers are solid, liquid and gaseous type. The major role of all the dielectrics is to provide sufficient insulation to the system to which it is used. Among them the function of liquid dielectric is to provide insulation…
A mathematical model of the direct chill (DC) casting process for AZ31magnesium slab has been developed to predict the temperature evolution in the slab. The temperature fields at different casting speeds were compared and the optimum casting speed of 300 mm × 800 mm magnesium slab in the certain pouring temperature a…
AISI 304 stainless steels have been cold-rolled to different thickness reduction degrees, and consequently a deformation-induced martensite phase transformation takes place in the specimens. Metallurgical microscopy was used to study the microstructure and morphology of the specimens. X-ray diffraction was also used t…
The work presents results of researches over the deposition of Ni-Mo alloys through the electrolysis conducted in galvanostatic conditions. In order to improve adhesion and aesthetic properties of the deposited alloys, SLS was added to the bath as a surface active agent. The influence of electrolyte pH was tested as w…
Point-contact Andreev-reflection spectroscopy (PCARS) has demonstrated to be one of the most effective experimental tools for the investigation of fundamental properties of superconductors such as the superconducting gap and the electron–phonon (or, more generally, electron–boson) coupling. By reviewing relevant examp…
This paper presents simulation studies and preliminary experimental results related to a hybrid battery-ultracapacitor energy source for an urban electric car. A proposal of energy management strategy based on fuzzy logic is introduced. Control strategy for the hybrid source is designed to achieve high-efficiency and…
Because traditional drug delivery poses many disadvantages such as poor compliance of patients and a drug plasma level variation, novel drug delivery systems containing controlled release drug vehicles become attractive. In this study, a kind of tri-block copolymer consisting of polycaprolactone (PCL) and poly(ethylen…
We develop a framework for a variational analysis of microstructural evolution during inelastic high‐temperature deformation accommodated by dislocation mechanisms and diffusive mass transport. A polycrystalline aggregate is represented by a distribution function characterizing the state of individual grains by three…
An Si wire array waveguide grating wavelength demultiplexer fabricated using immersion ArF lithography is reported. The tilt directions of the input and output star couplers are aligned in the same direction to avoid phase error generated at the curved waveguides. A 16 channel device with 200 GHz wavelength spacing wa…