Materials Literature
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Dielectric nano-swithes made of the materials that exhibit piezoelectric and/or flexoelectric properties with significant electro-mechanical coupling are considered. In this case, a nonuniform strain field may locally break inversion symmetry and induce polarization even in nonpiezoelectrics. At reducing dimensions to…
The diacid chloride 2-(N-methyl piperazine)-4,6-bis(2-naphthoxy-6-carbonyl chloride) [MPNCCT] has been synthesized, from which different homopolyesters have been made by polycondensation with the following diols: bisphenol-A [BPA], bisphenol-C [BPC], bisphenol-S [BPS], 1,4-dihydroxy anthraquinone [1,4-DHA], 1,8-dihydr…
The first part of this work presented the results of the experimental determination of residual stresses along top joints in pipes. The purpose of the second part will be to present a critical evaluation of the microstructure and hardness of the welded joints for pipes with small diameter used in oil refineries, aimin…
Abstract The preparation of a novel polymeric photostabilizer was carried out via the vibromilling of poly(vinyl chloride) (PVC) powder, a reactive light stabilizer (r‐LS), and a peroxide initiator in ball‐containing jars with a planetary ball mill for a certain time. The effects of the initiator content, milling time…
The current work aims to investigate the effect of sand particle size, applied load, and kenaf fibre orientation on the three-body abrasion wear behaviour of epoxy composite subjected to high stress. Experiments were conducted using a dry sand/steel wheel apparatus at different applied loads (5-20 N). The tests were p…
Synthesis, characterization, crystal structure, and magnetic properties of the first single µ1,3-thiocyanato-bridged dicobalt(II) compound, [CoII(dien)(H2O)(NCS)(µ1,3-NCS)CoII(dien)(NCS)2] (1; dien = diethylenetriamine), are described. In 1, cobalt(II) is six coordinate with distorted-octahedral geometry. The Co(1) ··…
Thermodynamic stability of model single component and binary mixture fluids is considered with the Fisher-Ruelle (FR) stability criteria, which apply in the thermodynamic limit, and molecular dynamics (MD) simulation for finite periodic systems. Two soft-core potential forms are considered, phi(6,1)(r)=4[1/(a+r(6))(2)…
Abstract A new organosilica hybrid mesoporous material (HM) containing phosphane oxide surface groups was prepared via the “dual” organosilane templated co‐condensation of 4‐bis(triethoxysilyl)benzene and (diphenylphosphanyl)propyltriethoxysilane, followed by post‐synthesis oxidation of the phosphane surface groups. T…
Abstract The problem of scale formation in oil field production facilities is encountered as a result of mixing of injection water (Lias) rich in sulfate with formation water (Ordovicien) rich in barium. 1 A large number of methods have been developed for the prevention of these deposits. In this work, poly(maleic aci…
Monodisperse nanosized mesoporous particles were synthesized by sol-gel reaction. This study investigated the effects of different types of nanoparticles and amount of nanoparticles on mechanical performance of polypropylene (PP) composites. Four different types of nanoparticles, namely, mesoporous MCM-41 (without tem…
Abstract Random, diblock, and triblock copolymers of butadiene and styrene, with a well‐defined, high number of 1,4‐trans units (c.a. 80%), were synthesized by anionic living polymerization using an initiator system composed of alkyl aluminum, n ‐butyl lithium, and barium alkoxide. The thermal properties of the block…
Chitin from squid pen (Loligo sp.) and kiddi shrimp shell (Parapenaeopsis stylifera) were treated at room temperature (30 ± 2°C) with four different concentrations of sodium hydroxide: 20, 30, 40, and 50% w/w. With 50% sodium hydroxide solution, within 108 h, the chitin from squid pen was deacetylated to give chitosan…
Triblock copolymers, polyethylene oxide-(hexa- p -phenylene)-polyethylene oxide, were synthesized and used for dispersing single-walled carbon nanotubes (SWNT) in organic solvents. The resulting dispersions comprise mostly of individual tubes, as indicated by transmission electron microscopy at cryogenic temperatures.…
Andreev bound states have been proposed as an experimental probe to detect the pairing symmetry in iron pnictide superconductors. However, previous theoretical studies show that the local density of states below the superconducting gap is small, making the detection rather challenging in experiments. We revisit this i…
High-resolution electron energy loss spectroscopy has been used to study the electronic properties of Ag thin films deposited on Cu(1 1 1) and modified by Ar + sputtering. Ion sputtering strongly modifies the loss function in the region of single-particle transition as deduced from the appearance of sputtering-induced…
A viewing angle switchable liquid crystal display associated with fringe-field switching mode is proposed. In the device, one pixel is composed of a main pixel and a sub-pixel, in which both pixels are formed to generate a fringe electric field. However, the field directions are different from each other so that in th…
The degradation and roughening of polymers during plasma processing are important for the understanding of patterning of critical dimension features for both current and future lithographic techniques. Recently, the role of plasma-generated VUV photons in both the roughening and smoothing of current generation 193 nm…
A focused review on modelling and simulation of several key titanium features is presented with the intent to provide a broad overview of the titanium modelling efforts being worked on in academia and the industrial sector.
Laser scanning confocal microscopy (LSCM) and atomic force microscopy (AFM) were used to characterize changes in nanoscale structure that occur when ultrathin polyelectrolyte multilayers (PEMs) are incubated in aqueous media. The PEMs investigated here were fabricated by the deposition of alternating layers of plasmid…
Lithographically defined self-growing ZnO films were prepared by a bioinspired chemical bath deposition technique (CBD). We observed a high selectivity of ZnO deposition: Teflon-like per-fluoro-decyl-trichlorosilane (FDTS) monolayers repelled ZnO primary particles, whereas amino-functionalized areas of the substrate w…