Materials Literature
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This Letter reports the first ultrahigh-vacuum study of surface-enhanced Raman scattering from pyridine adsorbed on a clean single-crystal silver surface containing a smooth modulation (1 \ensuremath{\mu}m periodicity) to allow optical coupling to surface plasmon polaritons. A large mode-selective enhancement (\ensure…
It is shown how the molecular weight dependence of the radius of gyration ${R}_{F2}$ of two-dimensional polymeric chains can be derived from surface-pressure isotherms in Langmuir monolayers. ${R}_{F2}$ scales as ${N}^{\ensuremath{\nu}}$ with $\ensuremath{\nu}=0.56$ for polymethylmethacrylate and 0.79 for polyvinylace…
Article The Influence of DO3Order on the Martensitic Transformation in CuZnAu and CuZnAl Alloys was published on November 1, 1980 in the journal International Journal of Materials Research (volume 71, issue 11).
Article Kristallstrukturverfeinerungen von Euxenit, Y(Nb0.5Ti0.5)2O69 und M-Fergusonit, YNbO4 was published on November 1, 1980 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 152, issue 1-4).
The surface properties of Beta-HMX crystals were studied. The surface energies of three principal crystal faces were obtained by measuring contact angles with several reference liquids. The surface energies and polarity of the three crystal faces are found to be different.
The energy-balance approach has been further utilized to demonstrate that toughness is sensitive to surface energy, even when extensive plasticity develops during fracture. It is assumed that the plastic work done is directly proportional to the effective surface energy and this is justified with reference to a ‘micro…
Characterizing the properties of F − ‐doped MgO indicated new roles for fluorine ions in accelerating densification: (1) increased strains in MgO before rapid densification and (2) the thermal generation of enormous oxygen ion vacancies. Immediately after rapid shrinkage, fluorine‐containing species vaporized from the…
The copper distribution in sputtered aluminum–copper films depends on copper concentration and deposition temperature. At high deposition rates the film temperature is high enough for diffusion to occur without external substrate heating. Targets containing 0.5%, 2%, and 4% copper were used to deposit films by dc magn…
Classical results in the behavior of woven fabrics are extended to the case of fabrics having three planar, nonorthogonal axes of symmetry (triaxial). The biaxial loading analysis due to Grosberg is extended to the loading of triaxial fabrics in the machine and cross-machine directions in an attempt to predict fabric…
A patient exhibited confusion, dysphasia, and striking asterixis 18 hours after metrizamide myelography. The symptoms lasted for a day and a half. While metrizamide is a useful contrast medium, side effects are not unusual and can, on occasion, be quite severe.
Various schemes of using adiabatic demagnetization to provide refrigeration in the 10-1000 mK range are discussed with particular reference to the requirements for use in space. The methods considered are complete demagnetization, isothermal demagnetization, moving magnet demagnetization, and continuous refrigeration.…
Electrostatic-field optimization of the profile of the gas-dielectric interface was studied as a means of improving the dielectric performance of epoxy spacers. An optimum disc-shaped spacer was defined with a dielectric cone angle of 750, assuming a dielectric constant of the epoxy resin of 5 or higher. The dielectri…
The influence of an external field and of a space-charge polarization field on phase transitions in ceramic and monocrystalline PbZrO3 samples has been investigated. Attempts at defining the influence of purposely-formed structure defects on the presence and temperature range of the occurrence of the ferroelectric pha…
Abstract Die nicht äquivalenten S 2 2− ‐Liganden des [(S 2 ) 2 Mo v (S 2 ) 2 Mo v (S 2 ) 2 ] 2− ‐Komplexes zeigen gegenüber nucleophilen Reagentien deutliche Unterschiede in der Reaktivität. Endprodukt der Reaktion z. B. mit OH − in wäßrigem Medium ist [Mo 2 O 2 S 2 (S 2 ) 2 ] 2− , das als Tetramethylammoniumsalz in h…
Abstract The density ρ of N‐(p‐n‐butoxybenzylidene) p‐n‐butylaniline (BBBA) has been measured as a function of temperature from S H to isotropic liquid phase. The compound exhibits three smectic and two nematic phases. The phases assigned are S H ↔ S B ↔ S A ↔ N C ↔ N O ↔ I. The change of ρ across the transition S H ‐…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrosynthesis of the metal phthalocyanine complexesC. H. Yang, S. F. Lin, H. L. Chen, and C. T. ChangCite this: Inorg. Chem. 1980, 19, 11, 3541–3543Publication Date (Print):November 1, 1980Publication History Published online1 May 2002Published inissue 1 November 1980http…
The filtration performance of nonwoven thick synthetic fabrics used in soil stabilization, erosion control, and earth reinforcement is predicted from a proposed analytical method. The morphological analysis of many fabrics has been utilized to identify internal structure parameters responsible for their hydraulic prop…
Minimum temperatures for the initiation of smolder in cellulosic insulation materials were measured by the method of Bowes and Townshend (1-D heat flow through a layer on a hot surface). The minimum temperature decreases rather rapidly with layer thickness; a range of about 320°C to 220°C is indicated for layers from…
Some problems of the paracrystal model of diffraction from distorted lattices are discussed. The relationship between paracrystals and crystal growth-disorder models is established and the latter are used to generate examples of distorted lattices having many of the properties envisaged for paracrystals without some o…
Abstract A technical advance in the size reduction of cured scrap rubber has been achieved by a new process. The performance of products whose particle dimensions are 90% under 20 µm in diameter has been described in this study. When small panicle size rubber made by this process is used to extend high quality compoun…