Materials Literature
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A novel laser scatterometer linewidth measurement tool has been developed for critical dimension metrology of photomasks. Calculation of the linewidth is based on a rigorous theoretical model, thus eliminating the need for calibrations. In addition the effect of the glass substrate on which the photomask grating is pl…
Polyol Metal Complexes, II [1] . – Copper(II) Complexes with Multiply Deprotonated Ethylene Glycol, Anhydro‐erythritol, or Methyl α‐D‐Mannopyranoside as Ligands Violet to blue crystals of the polyolate cuprates Li 2 [Cu(eth 2− ) 2 ] · 6 H 2 O ( 1 ), A 2 [Cu(eryAn 2− ) 2 ] · 4 H 2 O, A = Na ( 2a ), K ( 2b ), and Li 3 […
Abstract Fluorescent spectra of the mononuclear europium(III) complex, Eu(H2 fsaen) (NO3)·5H2O, and the heteronuclear complexes MEu(fsaen) (NO3)·nH2O (n = 4 for M = Cu(II) and n = 6 for M = Ni(II)), were compared, where H4 fsaen is a binucleating ligand, N,N′-bis (3-carboxysalicylidene)ethylenediamine. It was found th…
A discussion of partial discharge (PD) testing of SF/sub 6/ gas insulated substations (GISs) is based on a consensus among the experts on and associated with WG K4 of the IEEE Substations Committee. Such testing is discussed in the context of type testing, factory routine testing, testing of solid dielectric spacers,…
Abstract The time-resolved thermal lensing (TRTL) technique was employed to study the photocyclization of diphenylamine (DPA) to form intermediate 4a,4b-dihydrocarbazole (DHC) in methanol solution at room temperature. The heat of reaction, ΔH, was determined to be (2.6 ± 0.2) × 102 kJ mol−1 (1DPA → 1DHC): The reaction…
The results of life tests performed on XLPE and EPR cable models are presented and discussed. The performance of the two insulating materials when subjected to electrical stress are compared on the basis of characteristic parameters derived by the best-fitting life models. It is found that while EPR is well described…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTApplication of the molecular simulation technique for clarification of the α .tautm. β phase transformation in poly(butylene terephthalate)Scott A. Nitzsche, Ying K. Wang, and Shaw L. HsuCite this: Macromolecules 1992, 25, 9, 2397–2400Publication Date (Print):April 27, 1992P…
DuPont E-120 high-modulus pitch-based carbon fibers were treated electrochemically in 0.5 M (NH 4 ) 2 CO 3 solution under both potentiostatic and galvanostatic modes. X-ray photoelectron spectroscopy (XPS) was used to monitor the chemical changes on the carbon fiber surfaces. Both core-level and valence-band spectra s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of regeneration conditions on the characteristics of water vapor adsorption on silica gelRong Luan Yeh, Tushar K. Ghosh, and Anthony L. HinesCite this: J. Chem. Eng. Data 1992, 37, 2, 259–261Publication Date (Print):April 1, 1992Publication History Published online1…
Previous studies have shown that photoelectrochemical methods used to study the semiconducting properties of oxides may be extended to in situ investigations of thin oxide films. A new expression relating the photocurrent to the film thickness has been derived by combining a simplified Gärtner/Butler model and an opti…
A finite element method for the Cahn-Hilliard equation (a semilinear parabolic equation of fourth order) is analyzed, both in a spatially semidiscrete case and in a completely discrete case based on the backward Euler method. Error bounds of optimal order over a finite time interval are obtained for solutions with smo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and preliminary characterization of a new fully aromatic mesogenic polyester containing a 2-phenylbenzoxazole groupU. Caruso, R. Centore, A. Roviello, and A. SiriguCite this: Macromolecules 1992, 25, 9, 2290–2293Publication Date (Print):April 27, 1992Publication Hi…
Structural relaxations, molecular-dynamics simulations, and lattice-dynamics calculations were performed to study the phase transitions in ${\mathrm{Rb}}_{2}$${\mathrm{ZnCl}}_{4}$, using intermolecular and intramolecular potentials generated from ab initio quantum-chemistry calculations for the whole molecular ion ${\…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal-thiolate bonding properties: single-crystal ESR, susceptibility, and polarized absorption evidence for a strong .pi. interaction in tetrakis(thiophenolato)cobaltate(II)Kouichi Fukui, Norimichi Kojima, Hiroaki Ohya-Nishiguchi, and Noboru HirotaCite this: Inorg. Chem. 19…
In order to compare the fates of end-chain-radiolabelled and repeat-unit-radiolabelled poly(β-malic acid)s after intravenous injection in mice, repeat-unit 14 C-radiolabelling of this biodegradable water-soluble poly carboxylic acid polymer was achieved starting from 14 C-aspartic acid. The ac tivity of the resulting…
For pt.I see ibid., vol.7, no.2, p.596-602 (1992). Preliminary results are described in which 15 kV XLPE cables were subjected to accelerated aging tests under a variety of controlled voltage stress and thermal load cycle conditions, with loss of life being calculated for each set of conditions in terms of the geometr…
Many of the methods for measuring beer foam are based on measurements of the weight or volume of beer collapsed from foam rather than on measurements of the foam itself. However, these drainage methods may not reflect the consumer's perception of foam collapse. Therefore, a method to characterize numerous properties o…
The control of the microstructure of Ce‐doped Al 2 O 3 /ZrO 2 componsites by the valence change of cerium ion has been demonstrated. Two distinctively different types of microstructure, large Al 2 O 3 grains with intragranular ZrO 2 particles and small Al 2 O 3 grains with intergranular ZrO 2 particles, can be obtaine…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTExciplex formation between pyrene derivatives and N,N-dimethylaniline in Aerosol OT reversed micellesClaudio D. Borsarelli, Juan J. Cosa, and Carlos M. PrevitaliCite this: Langmuir 1992, 8, 4, 1070–1075Publication Date (Print):April 1, 1992Publication History Published onlin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLithium-transition metal complexes derived from meso-octaethylporphyrinogen which display .sigma.- and .pi.-bonding modesJayne Jubb, Denis Jacoby, Carlo Floriani, Angiola Chiesi-Villa, and Corrado RizzoliCite this: Inorg. Chem. 1992, 31, 7, 1306–1308Publication Date (Print):…