Materials Literature
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Electroless Deposition of Thin-Film Cobalt-Tungsten-Phosphorus Layers Using Tungsten Phosphoric Acid ( H 3 [ P ( W 3 O 10 ) 4 ] ) for ULSI and MEMS Applications , Shacham-Diamand, Yosi, Sverdlov, Y., Petrov, N.
Nanocrystalline MgH2/MexOy composite powders were produced by high energy ball milling (MexOy=Sc2O3, TiO2, V2O5, Cr2O3, Mn2O3, Fe3O4, CuO, Al2O3, SiO2). The hydrogen absorption and desorption kinetics were determined in view of a technical application. The addition of selected oxides lead to an enormous catalytic acce…
A set of natural and heat-treated cordierite crystals has been analyzed using single-crystal X-ray diffraction, EMPA, SIMS, and 57Fe Mössbauer-spectroscopy. Structure determination of natural cordierite shows that the average size of the tetrahedrally coordinated T 1 1 cation increases systematically by about 0.01 Å a…
Amphiphilic dendritic–linear–dendritic triblock copolymers based on hydrophilic linear poly(ethylene oxide) (PEO) and hydrophobic dendritic carbosilane were synthesized with a divergent approach at the allyl end groups of diallyl-terminated PEO. Their micellar characteristics in an aqueous phase were investigated with…
A previously reported theoretical treatment for self-assembly macrocyclisations occurring under thermodynamic control has been tested experimentally. The fundamental quantities on which the treatment is based are the effective molarity (EM) of the self-assembling cyclic n-mer and the equilibrium constant for the inter…
A new organic conductor, β″-(BEDT-TTF)2SF5CHFCF2SO3 [BEDT-TTF, hereafter abbreviated ET, refers to bis(ethylenedithio)tetrathiafulvalene], was prepared by electrocrystallization. The crystal structure of this salt was determined by single crystal X-ray diffraction at 298 and 150 K, its physical properties were examine…
In this article we study the kinetics of thermal degradation of the epoxy system BADGE n = 0/m-XDA using different kinetic methods with data from thermogravimetric analysis (TGA) in dynamic conditions. Activation energies obtained using different integral methods (Flynn-Wall-Ozawa and Coats-Redfern Methods) are in goo…
Crystal structures of single crystals of ferroelectric Zn1−xLixO and paraelectric ZnO were studied by X-ray diffraction at 293K and 19K. At 293 K, the Zn-O bond length decreases by an amount of 0.007 Å along c-axis associated with Li-substitution. It is about two orders smaller than the changes in typical ferroelectri…
Regular patterns form in many solidification processes. Examples occur during lamella and rod-like eutectic growth and when single-phase cells or dendrites are formed. The scale and regularity of the microstructure can determine the properties of the cast materials and is thus important practically. The purpose of the…
The mixed valence cluster anion of the compound (NH4)32[MoVI110MoV28O416H6(H2O)58(CH3CO2)6].xH2O 1 (x approximately 250), synthesized under one-pot conditions, contains well-defined different types of defects--missing groups compared to the complete parent (Mo154) type cluster with full D7d symmetry--and acetate ligan…
This article deals with the structure, crystallization, morphology, and thermal behavior of poly(p-phenylene sulfide) (PPS) with low-molecular mass, probed by DSC, optical, and electron microscopy. The growth rates of spherulites were measured over the temperature range 235–275°C. A regime II–III transition was found…
Nanoparticles of chromium or nickel have been prepared by the reduction of either CrCl2 or Ni(acac)2 (acac = pentane-2,4-dionate) at elevated temperatures in various Lewis base solvents; the effect of the Lewis base, which acts as both a reaction solvent and passivating ligand on morphology are apparent; the nanostruc…
A microstructure function, G(x), is introduced as a general description of microstructure by considering simultaneously the spatial arrangement of phases, i(x), of crystallographic orientations, g(x), as well as of lattice defects and residual stress, D(x). Particular emphasis is laid on the orientation–location distr…
A simple, approximate analysis of the effect of different cathode and anode areas on the measurement of cell performance on anode-supported solid oxide fuel cells, wherein the cathode area is smaller than the anode area, is presented. It is shown that the effect of cathode area on cathode polarization, on electrolyte…
Copper is widely accepted as a next-generation metallization material for ultralarge-scale integration (ULSI) because of its low resistivity and high electromigration resistance. It is well known that Cu oxidizes easily at low temperatures. This characteristic has impeded the application of Cu in integrated circuits.…
Fe-Cr model alloys with variations in chromium content and additions of different reactive elements were studied for potential application in reduced temperature solid oxide fuel cells (SOFC). The oxidation resistance in both, anode and cathode atmospheres at 800°C were determined. Additionally, in-situ studies were c…
Aliphatic polyesters derived from lactic and glycolic acids (PLAGA) are the most attractive degradable polymers with respect to biomedical and environmental applications. Poly(e-caprolactone), PCL, is a hydrophobic highly crystalline aliphatic polyester that is more resistant to hydrolytic degradation than PLA. It is…
Ground tire rubber (GRT) and ultrasonically devulcanized GRT (DGRT) were blended with high density polyethylene (HDPE) in a Brabender internal mixer and a twin screw extruder. The DGRT with curatives was mixed with HDPE (HDPE/RGRT) and dynamically revulcanized in an internal mixer and a twin screw extruder. Also, HDPE…
Mammalian cochlea perilymph contains amino acids and protein which have a major effect on the electrochemistry of an implanted auditory prosthesis. Cyclic voltammetry in an artificial perilymph solution shows that many amino acids adsorb at the platinum electrode diminishing oxidation of the metal, and also blocking h…
A novel method based on the solid–liquid reaction in the Ti–Sn–C system was developed for the synthesis of Ti2SnC powders. In this process, Ti–Sn intermetallic compounds were formed in liquid Sn, then they further reacted with graphite powders to form Ti2SnC. The advantages of this solid–liquid reaction based method i…