CuCO3 by XPS
X-ray photoemission measurements of CuCO3 are presented.
Materials Literature
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Low-Temperature Thermal and Dielectric Properties of Na0.5Bi0.5TiO3
Thermal conductivity (at 5 to 300 K), dielectric (at 5 to 250 K) and sound velocity (at 5 to 150 K) measurements have been performed for the first time on ceramic samples of Na0.5Bi0.5TiO3. The data revealed a nearly temperature-independent plateau in thermal conductivity λ(T) at about 7 to 30 K and ≈︂0.2 W/mK. This p…
Magnetic susceptibility of multilayered carbon nanotubes
A theoretical study of the magnetic susceptibility of multilayered carbon nanotubes in fields both parallel, H ∥, and perpendicular, H ⊥, to the tube axis has been carried out disregarding electron-electron interaction. The temperature dependences of the magnetic susceptibility obtained exhibit a nontrivial form for H…
Simple technique for the simultaneous measurements of the four-probe resistivity and the thermoelectric power
We propose simple configurations to measure the thermoelectric power and the four-probe resistivity simultaneously for different types of samples.
Effect of nature of grain boundaries on intergranular liquation during weld thermal cycling of nickel base alloy
An Inconel 718 based alloy containing only trace amounts of C, S, and P was subjected to thermal cycling in a Gleeble 1500 system to induce microstructural features which are produced in the heat affected zone (HAZ) during welding. In the thermally cycled material many grain boundaries were observed to liquate; howeve…
Enhanced flux pinning of silver-sheathed tapes with nano-MgO particle addition
Nano-MgO particles have been introduced into silver-sheathed tapes fabricated by the rod-in-tube process. It is found that the transport properties of the nano-MgO particle doped sample are noticeably improved compared with those of the undoped sample. The irreversibility line of the MgO-doped sample shifts to higher…
Part 2.N-[m-(3-(trifluoromethyl)diazirine-3-yl)phenyl]-4- (-3-thio(-1-D-galactopyrannosyl)-maleimidyl)butyramide (MAD-Gal) on diamond
Time-of-flight secondary ion mass spectrometry (ToF-SIMS) and x-ray photoelectron spectroscopy (XPS) are used to characterize a newly synthesized glycosylated photoactivatable reagent designed for surface glycoengineering. The glycoaryldiazirine reagent MAD-Gal (N-[m-(3-(trifluoromethyl)diazirine-3-yl)phenyl]-4-(-3-th…
Palm Oil Fatty Acid Additives (POFA's): Preparation and Application
A synthesis procedure for preparing palm oil fatty acid additives (POFA's) is described. The performance of these acids in carbon black (CB) filled natural rubber (NR) compounds was examined. The incorporation of POFA's is found to improve mechanical properties of CB filled NR compounds, especially below a concentrati…
A Solid-State Electrochemical Device Using Poly(pyrrole) as Micro-actuator
A solid-state microactuator was studied using volume change due to redox reaction of poly(pyrrole) film. Pyrrole was electropolymerized on a comb-shaped microelectrode array, and the poly(pyrrole) film was covered by a solid polymer electrolyte, polyethylene glycol. The volume change of the poly(pyrrole) film by elect…
A Novel Technique for Optical Imaging of Liquid Crystal Alignment Layers
We have employed a phase modulation method using a photoelastic modulator to determine the uniformity and quality of the alignment layer of liquid crystals (LCs). It is demonstrated that a two-dimensional map of the phase retardation, associated with irregular rubbing and/or chemical contaminants, provides invaluable…
Stress Concentration Due to Fiber‐Matrix Fusion in Ceramic‐Matrix Composites
Stress concentration in ceramic‐matrix composites due to fiber‐matrix fusion is investigated using finite‐element modeling (FEM) in conjunction with experiment. FEM results indicate substantial stress concentration can be expected when the fiber and matrix are locally fused. The focus of the investigation is sealing t…
Flux-pinning-induced magnetostriction in cylindrical superconductors
The irreversible behaviour of the pinning-induced magnetostriction of a cylindrical superconductor placed in a parallel magnetic field, , is analysed. An exact solution of the magneto-elastic problem is found and we present formulas for the deformation, , and the stress distributions, and , valid for any critical-stat…
Cristobalite-Related Phases in the NaAlO2–NaAlSiO4 System. II. A Commensurately Modulated Cubic Structure
The crystal structure of a new cubic cristobalite-related sodium aluminosilicate Na 1.45 Al 1.45 Si 0.55 O 4 [ P 2 1 3, a = 14.553 (1) Å] has been modelled using a modulation wave approach and the model tested against X-ray powder diffraction data using the Rietveld method. Owing to there being 64 independent position…
Syntheses, Structures, and Properties of New Quaternary Gold-Chalcogenides: K2Au2Ge2S6, K2Au2Sn2Se6, and Cs2Au2SnS4
The new compounds K2Au2Ge2S6 (1), K2Au2Sn2Se6 (2), and Cs2Au2SnS4 (3) have been synthesized through direct reaction of the elements with a molten polyalkalithiogermanate(stannate) flux at 650, 550, and 400 °C, respectively. Their crystal structures have been determined by single crystal X-ray diffraction techniques. 1…
Scattering of a scalar field at dielectric surfaces by Born series expansion
A method for the calculation of the transmitted and reflected scalar fields at arbitrary dielectric surfaces is presented. The method is based on an evaluation of the Born series expansion and is of high accuracy as multiple reflections and refractions are taken into account. We show by comparison with Fresnel formula…
Beam steering with two ferroelectric liquid-crystal spatial light modulators
Ferroelectric liquid-crystal spatial light modulators (FLC SLM's) are binary modulating devices that can be used for flexible beam steering in the microsecond range. Because they are binary, at least 60% of the light power is lost to unwanted diffraction orders, however. We suggest the use of a second FLC SLM, synchro…
Ultrasonic and Mechanical Behavior of Green and Partially Sintered Alumina: Effects of Slurry Consolidation Chemistry
Green and partially sintered compacts of alpha‐Al 2 O 3 powder were made by filtration of aqueous suspensions under three conditions: ( i ) electrostatic stabilization without any organic additive, ( ii ) strong flocculation near the isoelectric point without any organic additive, and ( iii ) weak flocculation by the…
Active platelet movements on hydrophobic/hydrophilic microdomain-structured surfaces
The early motion and interaction of platelets on a microdomain-structured block copolymer surface composed of 2-hydroxyethyl methacrylate (HEMA)-styrene were analyzed and compared with those on a compositionally identical random copolymer, homopolymer poly (HEMA) (hydrophilic) and polystyrene (hydrophobic) surfaces. C…
New Synthetic Routes to Hydrotalcite-Like Compounds − Characterisation and Properties of the Obtained Materials
Hydrotalcite-like anionic clays of general formula [M(II)1–xM(III)x(OH)2]x+[CO32–x/2]x– · m H2O with M(III) = Al and M(II) = Mg, Ni, Zn have been prepared by precipitation of the hydroxycarbonates from the “homogeneous” solution after the thermally induced hydrolysis of urea. The effect of the temperature of precipita…
Towards Functionalised Quasi-planar Dithiadiazafulvalenes: Synthesis of Various Precursors
All articles of this category lithiation - bis(thiazole-2(3 H )-selone) - aza-TTF precursors - DTDAF