Materials Literature
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Abstract 2,5‐Dibromo‐1,4‐(dihydroxymethyl)benzene was used as initiator in ring‐opening polymerization of ε‐caprolactone in the presence of stannous octoate (Sn(Oct) 2 ) catalyst. The resulting poly(ε‐caprolactone) (PCL) macromonomer, with a central 2,5‐dibromo‐1,4‐diphenylene group, was used in combination with 1,4‐d…
This paper describes water diffusion into and electrical testing of unidirectional glass reinforced polymer (GRP) composite rods used as load bearing components in high voltage composite (non-ceramic) insulators. The tests were performed following ANSI standard C29.11 Section 7.4.2 that can be used to evaluate electri…
This paper summarizes results from recent studies on electromigration (EM) reliability of Cu dual-damascene interconnects using a statistical approach. First, mass transport in Cu damascene structure was discussed, where the activation energies for oxide, porous MSQ (methylsilsesquioxane), and organic polymer dielectr…
Abstract Factors influencing the degree of intercalation (‘reactivity’) of kaolinite group minerals have been investigated using six kaolin minerals, with variable crystallinity and particle size. Tests were performed to measure the degree of intercalation with potassium acetate, formamide, dimethylsulphoxide and hydr…
In this work, surface-enhanced vibrational spectroscopy and normal vibrational spectroscopy as well as density functional theory (DFT) computational methods have been employed to investigate the nature of the chemical adsorption and orientation of the surface species generated from salicylic acid at silver surfaces. T…
”QVD”detectors are based on thermoelectric heat-to-voltage (Q V) conversion and digital (V D) readout. We have devised and analyzed the performance of QVD detectors with several different sensor designs that enable use of high thermoelectric figure of merit samples, be they of thin film, bulk crystal, or whisker form.…
Abstract The synthesis of silica‐graft acrylonitrile‐butadiene‐styrene (ABS) nanocomposites and their thermal properties are studied. The silica nanopowders are treated with silane to introduce reactive groups onto the silica surfaces. The dispersion of modified silica nanoparticles in tetrahydrofuran (THF) is signifi…
The crystal structure of epistolite, ideally Na4 Nb2 Ti4+ (Si2O7)2 O2 (OH)2 (H2O)4, a 5.460(1), b 7.170(1), c 12.041(2) Å, 103.63(3), 96.01(3), 89.98(3)°, V 455.4(5) Å3, space group P¯1, Z = 1, Dcalc 2.987 g.cm–3 from the Ilímaussaq alkaline complex, South Greenland, has been solved by direct methods and refined to R1…
A dynamic model with hysteretic nonlinearity for magnetostrictive actuators has been established, combined with the Jiles-Atherton model. The hysteresis parameters for the model have been optimized using the genetic algorithm (GA). Simulation and experimental results demonstrated the effectiveness of the model and par…
Elastic fibers are mostly used in elastic textiles. In this study, we develop a novel and original method to make highly elastic complex yarns using a self-designed, multi-section drawing frame and rotor twister. We examine the mechanical properties of these elastic complex yams. Their maximum breaking tenacity is hig…
Electromigration of Cu and diffusion of Co in Cu damascene bamboo-like grain structure lines capped with CoWP have been studied for sample temperatures between 350 and 425 °C. Void growth from the Cu line/W via interface was observed. Bulk-like activation energy for electromigration of 2.4±0.2 eV was obtained for thes…
Abstract The adsorption of poly(vinyl alcohol) (PVA) on montmorillonites saturated with calcium (Ca-Mt) and sodium (Na-Mt) as a function of the pH value and PVA concentration in aqueous solution was studied. Owing to the binding effect of the bivalent cation, the adsorption of PVA on Ca-Mt decreases as the pH of the s…
Silicon charge-coupled devices (CCDs) covered with a scintillating film are now available on the market for use in digital medical imaging. However, these devices could still be improved in terms of sensitivity and especially spatial resolution by coating the CCD with an array of scintillating waveguides. In this pape…
We numerically study phase-separation dynamics of symmetric mixtures of an isotropic liquid and a liquid crystal, incorporating nematohydrodynamics, for the first time. We find that the hydrodynamics not only accelerates the domain growth, but also leads to the breakdown of the morphological symmetry of the two phases…
Abstract Silica‐supported polyamidoamine (PAMAM) dendrimers with different spacer lengths were prepared. After the introduction of diphenylphosphino groups, complexation to dibenzylidenepalladium(0) gave the desired silica‐supported dendrimer–palladium catalyst complexes G0 to G4‐C2‐Pd. These catalysts showed activity…
The smallest mark which can be produced in phase-change recordings has been explored using an atomic force microscope. Electrical pulses applied to amorphous Ge 2 Sb 2 Te 5 films through conducting cantilevers can produce crystalline marks, the size decreasing with decreases in input power, pulse duration, and film th…
Failure modes for inter-level dielectric layers under accelerated test conditions have been evaluated for a range of dielectric diffusion barriers in copper/low-k structures. The dominant failure mechanism for both constant voltage tests and ramped voltage tests was mechanical cracking at the dielectric barrier/low-k…
Strong green-light emission occurs in Eu:SrAl2O4 ceramics and Eu:SrAl2O4/poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) composites when excited by a lower dc or ac voltage. That emission is caused by strong electric-mechanic-optic interaction. The composite shows stronger luminescent emission intensity in c…
Abstract Porous TiNi shape‐memory alloy (TiNi SMA) bodies with controlled pore structure were produced from the (Ti+Ni) powder mixture by self‐propagating high‐temperature synthesis (SHS) method. The effect of processing variables such as the kind of starting powders, ignition temperature and preheating schedule on th…
The reaction kinetics and mechanisms between 8 mol% yttria‐stabilized zirconia (YSZ) and 30 mol% Sr‐doped lanthanum manganite (La 0.65 Sr 0.30 MnO 3 , LSM) with A‐site deficiency for the application of planar solid oxide fuel cells (SOFCs) were investigated. The LSM/YSZ green tapes were cofired from 1200° to 1400°C fo…