Materials Literature
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Bismuth enters into the alkali halide lattice in its trivalent and/or divalent state if it is introduced by diffusion of bismuth vapors at appropriate temperatures. In its trivalent state its ground state is $^{1}S_{0}$ and transitions from this level to the $^{3}P_{1}$, $^{3}P_{2}$, and $^{1}P_{1}$ states are the wel…
The Fujita-Ban model and the classical Free-Wilson model are shown to be linearly related: the de novo group contributions obtained by one model are linear transformations of those obtained by the other model. An example is given to illustrate this linear dependence. The Fujita-Ban model is characterized by a number o…
A special lift-off technique for realizing small metal interconnection geometries for integrated circuits is described. 0.6-/spl mu/m gaps between metal conductors can be obtained even at 0.8-/spl mu/m metal layer thickness. The slopes of the conductors are tapered. Etching problems inherent in alloy films or sandwich…
The optical constants of sputtered and bulk amorphous As have been obtained from 0-03 to 30 eV by Kramers-Krönig analysis of the reflectivity spectra. The optical gap for oxygen free films occurs at 1-1 eV. The slope of the exponential absorption edge (12 eV−1) is contrasted with slopes reported for other elemental am…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text J. W. Berthold, S. F. Jacobs, and M. A. Norton, "Dimensional stability of fused silica, Invar, and several ultralow thermal expansion materials," Appl.…
Soft X-ray appearance potential spectra were recorded for a series of Fe/Ni alloys whose compositions in the surface region were determined by means of Auger electron spectroscopy. The L 3 appearance potentials (correlated with the binding energies of 2p 3/2 electrons) of Ni increase by 0.5 eV between 0 and 30% Fe and…
350-keV He+ backscattering analysis was applied to the investigation of Ag photoinduced diffusion into As2S3 glass and proved to be suitable for the present purposes. Silver atoms diffuse into As2S3 by photoirradiation (termed ’’photodoping’’). Photodoped Ag concentration is nearly uniform and falls abruptly beyond a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStabilization of carbonyl clusters by a carbide atom. Synthesis and characterization of carbonoctadecacarbonyloctacobaltate(2-) and of paramagnetic carbontetradecacarbonylhexacobaltate(1-) anionsVincenzo G. Albano, Paolo Chini, Gianfranco Ciani, Mirella Sansoni, Donatella St…
Abstract Die aliphatischen Polyamide Polyamid‐6 ( 1 ), Polyamid‐6,6 ( 2 ) und die aromatischen Polyamide der Terephthalsäure mit verschiedenen Diaminen [ p ‐Phenylendiamin, ( 3 ), 4,4′‐Biphenylylendiamin, ( 4 ), 4,4′‐Oxydianilin, ( 5 )] sowie Polyimide der Pyromellitsäure mit aliphatischen Diaminen [Äthylendiamin, ( 6…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHalogen-metal exchange in esters of haloaryl acidsWilliam E. Parham and Lawrence D. JonesCite this: J. Org. Chem. 1976, 41, 16, 2704–2706Publication Date (Print):August 1, 1976Publication History Published online1 May 2002Published inissue 1 August 1976https://pubs.acs.org/d…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhosphorus-nitrogen compounds. 26. Molecular motion and molecular separations in cyclophosphazene clathratesH. R. Allcock, R. W. Allen, E. C. Bissell, L. A. Smeltz, and Martha TeeterCite this: J. Am. Chem. Soc. 1976, 98, 17, 5120–5125Publication Date (Print):August 1, 1976Pu…
The angular spectrum of plane waves representation is obtained for the electromagnetic field radiated by a localized current source in a uniaxially anisotropic medium. The linear medium is homogeneous throughout all space. It may be absorbing and temporally dispersive but is not spatially dispersive. The conductivity…
Current theories of the smectic C phase depend primarily on the presence of dipole moments. However, certain mesogens have now been prepared which suggest that an alternative view relating to the origin of these tilted lamellar phases will have to be considered.
Abstract A model for the electrostatic properties of hydrated collagen fibrils, based on the concept of a “penetrable” protein, has been evaluated through studies of collagen fibrils that had been chemically modified to change their electrostatic properties,. A value of 0.28 ± 0.07 ml/g was found for the intrafibrilla…
The utilization by Escherichia coli K12 of raffinose as sole carbon source depends on a new raffinose transport system, an invertase and an alpha-galactosidase specified by the Raf-plasmid D1021. The alpha-galactosidase was purified to homogeneity from a mutant strain with constitutive synthesis of the enzyme. alpha-G…
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The phase diagram, growth processes of extended-chain crystal and high pressure phase, and the temperature dependency of lattice parameter in polyethylene have been studied under high pressure up to 6000 kg/cm 2 using a new high pressure X-ray diffraction apparatus. The high pressure phase diagram obtained by micro-DT…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structure of zirconium monochloride. A novel phase containing metal-metal bonded sheetsDouglas G. Adolphson and John D. CorbettCite this: Inorg. Chem. 1976, 15, 8, 1820–1823Publication Date (Print):August 1, 1976Publication History Published online1 May 2002Published…
Integrated high-frequency transistors (f/SUB T/>3 GHz) with an arsenic implanted polysil emitter have been investigated. The results are compared with data of bipolar transistors made with the conventional planar technique. It is shown that better emitter efficiency higher current carrying capability, and improved emi…
A complete individualization of cotton tufts produced in an opening room is not easy, and hence the tuft weight distribution can be largely influenced by the technique used for tuft separation. Various research workers have arrived at different types of tuft weight frequency distribution. The present study describes a…