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Abstract An efficient method for quantitative XPS analysis is the so‐called multiline approach. This method does not require standards, it takes into account the instrumental and matrix effects and it derives quantitative information from statistical analysis of all photoelectron intensities visible in the spectra. On…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular Motion of Isolated Polyethylene Chains in the Solid StateFrederic C. Schilling, Karl R. Amundson, and Piero SozzaniCite this: Macromolecules 1994, 27, 22, 6498–6502Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published iniss…
We have studied (LuC${)}_{2}$(${\mathrm{Ni}}_{2}$${\mathrm{B}}_{2}$) and (LuC)(${\mathrm{Ni}}_{2}$${\mathrm{B}}_{2}$) at ambient and high pressures. Superconductivity was discovered in (LuC${)}_{2}$(${\mathrm{Ni}}_{2}$${\mathrm{B}}_{2}$) at 2.9 K. Pressure was found to suppress both the electrical resistivity and the…
The spreading of a thin drop of fluid that partially wets a plane surface is calculated. Capillarity, slip, and intermolecular forces are included in the model, and it is shown that a complete solution is possible without having to exclude the vicinity of the contact line and without having to assume the dynamic behav…
Superplastic SiAlON's of the nominal composition Y m /3 ‐Si 12‐( m + n ) AL m + n O n N 16– n are reported in this study using a transient‐phase‐forming approach. They encompass the fields of single‐phase α′‐SiAlON, single‐phase β′‐SiAlON, and their two‐phase mixtures. Excellent formability is obtained at 1550°C for t…
Grain boundary engineering is based on the fact that special grain boundaries (i.e. low Σ CSL) may have beneficial physical and chemical properties. It is now possible to increase and characterize the fraction of low Σ interfaces in polycrystalline materials, thereby improving their bulk properties by controlling the…
Results of optical-absorption experiments on heavily irradiated NaCl single crystals are presented. The dose rates were between 4 and 250 Mrad/h; the doses between 1 and 7 Grad. The irradiation temperatures were in the range of 20--150 \ifmmode^\circ\else\textdegree\fi{}C. Because of the intense optical bands, the thi…
We argue that the possibility to observe a stable biaxial nematic phase in a binary \nmixture of prolate and oblate hard particles is seriously limited by the existence of entropydriven \ndemixing. This result follows from a simple Onsager-type density functional theory. An \nimportant feature15 the coupli…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of Bromide Oxidation by (Oxalato)oxodiperoxomolybdate(VI)Martha S. Reynolds, Steven J. Morandi, James W. Raebiger, Sean P. Melican, and Sean P. E. SmithCite this: Inorg. Chem. 1994, 33, 22, 4977–4984Publication Date (Print):October 1, 1994Publication History Publish…
The evolving realm of inorganic chemistry. Part 1 Co-ordination chemistry: an introduction to co-ordination chemistry structures of co-ordination compounds bonding theories for co-ordination compounds rates and mechanisms of reactions of co-ordination compounds applications of co-ordination compounds. Part 2 Solid-sta…
A new type of grafted polysiloxane polymer is described in which an aryldiamine\nsubstituent, [CsH3(CHzNMe2)2-2,61-, provides a pendant terdentate ligand environment for\na catalytically active (0rgano)nickel center. The novel strategy employed involves initial\ngrafting of the aryl bromide 5-amino-2-bromo-1,3-bis[(di…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOn the Preparation of Organosilicon .mu.-Spheres: A Polycondensation in .mu.-Emulsion?Frank Baumann, Manfred Schmidt, Bernward Deubzer, Michael Geck, and Jochen DauthCite this: Macromolecules 1994, 27, 21, 6102–6105Publication Date (Print):October 1, 1994Publication History…
The dielectric properties of (Pb 1– x X x ) (Zr 0.7 Ti 0.3 )O 3 (X = Ca, Sr, Ba) ceramics (abbreviated PXZT) were investigated for applications to multilayer ceramic capacitors (MLCs) with dielectric layers thinner than 10 μm. The dissipation factors for MLCs with 5‐μm‐thick dielectric layers were estimated from those…
We have coupled electron paramagnetic resonance (EPR) and polarization–voltage measurements to understand the effects of reducing ambients on the remanent polarization and density of paramagnetic centers in BaTiO 3 , single crystals. Two types of reducing ambients were explored; one was done under vacuum (slightly red…
The copper(II) complex of the N4S2 encapsulating ligand 1-methyl-8-ammonio-3,13-dithia-6,10,16,19-tetraazabicyclo-[6.6.6]icosane, [Cu(AMN(4)S(2)sarH)](3+), is reported. Crystals of the complex are monoclinic, of space group P2(1)/a (Z = 4, a = 16.463(3) Angstrom, b = 11.073(3) Angstrom, c = 17.138(3) Angstrom, beta =…
The effects of compressive deformation on the grain boundary characteristics of fine‐grained Y‐TZP have been investigated using surface spectroscopy, impedance analysis, and transmission electron microscopy. After sintering at low temperature (1150°C), the grain boundaries are covered by an ultrathin (1nm) yttrium‐ric…
<div class="htmlview paragraph">Smoke emission from single-cylinder DI and IDI diesel engines was shown to strongly depend on oxygen content in fuel regardless of oxygenate molecular structure. Thus, with cetane improver and oxygenate used in combination in a proportion determined from blending properties and po…
A simulated annealing method for atomic resolution structure prediction of alpha-helical coiled coil proteins is described which draws upon knowledge of the oligomerization state, the helix directionality, and the properties of heptad repeat sequences. Unknown structural parameters, such as the coiled coil twist angle…
We consider both the spatial domain and spectral domain forms of the Green's function, appropriate in the electromagnetic diffraction of a plane wave incident at a general angle in the xy plane on a singly periodic structure, or grating, oriented along the x axis. We equate the spatial and spectral forms of the Green'…
A unifying, quantitative analytical framework has been developed for rhombohedral perovskite structures, ABO 3 . Three principal parameters are defined: polyhedral volume ratio, V A /V B , mean octahedral tilt angle, , and octahedral distortion, Δs. The first two of these parameters are directly related through the eq…