Novel cluster complexes of gold(0)–gold( I )
M. McPartlin, R. Mason and L. Malatesta, J. Chem. Soc. D, 1969, 334 DOI: 10.1039/C29690000334
Materials Literature
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Flashover voltage of high-voltage insulators with uniform surface-pollution films
Contamination on the surface of high-voltage outdoor insulators can lead to the formation of quasistable gas discharges, which burn in series with the resistive contaminative film. Under certain conditions, these discharges may grow to cause a complete flashover. In this paper, a model for the case of a discharge burn…
Infrared Spectra of Cubic and Tetragonal Manganese Ferrites
Abstract The infrared absorption spectra in the range from 200 to 700 cm −1 of cubic and tetragonal manganese ferrites, Mn x Fe 3– x O 4 , are reported. An analysis of the spectra is made with a model by which the lattice vibrations are classified into species of the point group D 2 d on the analogy of the results for…
The scaled particle theory for particles of arbitrary shape
The scaled particle theory of Reiss et al. has been extended to hard non-spherical particles and equations analogous to the Percus-Yevick equation have been obtained for mixtures of particles of the same shape but different sizes. The resulting equation of state produces exact second and third virial coefficients whic…
Inhibition Mechanism of Medium-Sized Polymethyleneimine
The inhibitive effect of medium‐sized polymethyleneimines on the corrosion of iron in HCl solution is particularly good, and this effective inhibition is closely related to the angle of C‐N‐C bond or to strain in the ring as has been observed previously. The inhibition mechanism of the cyclic imines is developed furth…
Thermoplastic elastomers
Abstract An important new class of polymers, the thermoplastic elastomers, was announced by the Shell Chemical Company (U.S.A.) in 1965. These new products may be formed into useful articles by modern rapid thermoplastics processing techniques, such as injection molding, and without any chemical vulcanization step pro…
A simple, sensitive graphical method of treating thermogravimetric analysis data
Thermogravimetric Analysis (TGA) is finding increasing utility in investigations of the pyrolysis and combustion behavior of materials. Although a theoretical treatment of the TGA behavior of an idealized reaction is relatively straight-forward, major complications can be introduced when the reactions are complex, e.g…
The Orientation of Domain Walls in Twinned Ferroelectric Crystals
Due to the spontaneous deformations of ferroelectric crystals in their ferroelectric phases, twins (domains) may be separated only by those composition planes (domain walls) which satisfy the mechanical compatibility conditions; such planes are in an infinite crystal called permissible walls. A mathematical treatment…
The Mechanism of the Dendritic Electrocrystallization of Zinc
Measurements have been made of the growth rate of zinc dendrites in alkaline zincate solutions as a function of overpotential (η), concentration ( c ) , and temperature ( T ) . The tip radii have been measured by electron microscopy. At constant potential, an initiation time of between 5 and 100 min is observed, depen…
Surface-Tension-Driven Phenomena
The field of fluid mechanics is rapidly advancing, driven by unprecedented volumes of data from experiments, field measurements, and large-scale simulations at multiple spatiotemporal scales. Machine learning (ML) offers a wealth of techniques to extract ...Read More
Structural mechanics of fibers, yarns, and fabrics
Contents: An engineering approach to textile structures. One-dimensional structures: yarn geometry. Form and fiber arrangement in twisted yarns (Hearle). Theory of the extension of continuous filament yarns. Observed extension and breakage of continuous filament yarns. Theory of the mechanics of staple fiber yarns. Ob…
Defects and Radiation Damage in Metals
Preface 1. Introduction 2. Point defects 3. Extended defects 4. The primary event 5. The collision cascade 6. Point defects in irradiated metals 7. Point defect clusters in irradiated metals 8. Impurity damage Bibliography Index.
Shapes of Inhomogeneously Broadened Resonance Lines in Solids
Inhomogeneous broadening has been observed in resonance lines in solids over the wide range of energies spanned by nuclear magnetic resonance, electron spin resonance, optical, and M\"ossbauer methods. The broadening arises from random strains, electric fields, and other perturbations from the defects in the lattice c…
Elements of X-ray Crystallography
Share Icon Share Twitter Facebook Reddit LinkedIn Reprints and Permissions Cite Icon Cite Search Site Citation Leonid V. Azároff, Richard B. Zipin; Elements of X-ray Crystallography. Physics Today 1 January 1969; 22 (1): 99. https://doi.org/10.1063/1.3035379 Download citation file: Ris (Zotero) Reference Manager EasyB…
Electromigration failure modes in aluminum metallization for semiconductor devices
Two wear-out type failure modes involving aluminum metallization for semiconductor devices are described. Both modes involve mass transport by momentum exchange between conducting electrons and metal ions. The first failure mode is the formation of an electrically open circuit due to the condensation of vacancies in t…
Cross-Linking–Effect on Physical Properties of Polymers
Many of the polymers used in composite systems and in other applications are cross-linked or thermoset polymers. How do such cross-linked polymers differ in properties from the better-understood linear or thermoplastic polymers? This review paper attempts to answer this question. The paper is written from the practica…
Polarons in crystalline and non-crystalline materials
The current state of polaron theory as applicable to transition metal oxides is reviewed, including problems such as impurity conduction where disorder plays a role. An estimate is given of the conditions under which polaron formation leads to an enhancement of the mass but no hopping energy. The binding energy of a p…
Synthese und halbleitereigenschaften einiger komplexe und der aus ihnen hergestellten polymeren. Teil 2. Polymere mit phthalocyaninartiger und triazinartiger stuktur
Abstract Polymere mit phthalocyaninrtiger Struktur ergaben sich durch Reaktion von einigen schwefelhaltigen Komplexen, die vier Nitrilgruppen enthalten, mit Kupferacetylacetonat bei höherer Temperature. Die Leitfähigkeiten der Polymeren liegen zwischem 6,3·10 −3 und 2,1·10 −10 Ohm −1 cm −1 . Die Aktivierungsenergie ze…
Tertiary Diatom Flora of Oga Peninsula, Akita Prefecture, Northeast Japan
Ninety-one samples of diatomaceous rocks collected from seven separate sections of the Miocene and Pliocene strata of Oga Peninsula. Akita Prefecture, were studied. The samples are from, in ascending order, the upper part of the Onnagawa Formation, the Funakawa Formation, the Kitaura Formation, the Wakimoto Formation…
Vinyl polymerization. 217. Vinyl compounds of nucleic acid basis. I. Synthesis of N‐vinylthymine, and N‐vinyladenine
Abstract The synthesis of N‐vinyluracil, N‐vinylthymine, and N‐vinyladenine is described. The general procedure consists of the conversion of the corresponding nucleric acid bases to their N‐hydroxyethyl compounds, followed by chlorination to the N‐chloroethyl compounds and dehydrochlorination to the N‐vinyl derivatie…