Materials Literature
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The low-temperature thermal conductivity of three type-II $a$ diamonds irradiated with 0.75-MeV electrons at room temperature and one irradiated at 77 K was found to be reduced and is characteristic of phonon scattering by large aggregates: the conductivity changing from Rayleigh scattering at the lowest temperatures…
The theory of the angularly dependent photoemission from a semi-infinite crystal as a one-step process is briefly reviewed, starting from the formulas of Adawi and using surface-matched wave functions in both upper and lower states and absorption in the upper state. We derive conditions under which the three-step mode…
A systematic perturbation theory is developed to study the interaction of electromagnetic waves at rough dielectric surfaces. The Ewald-Oseen extinction theorem is used as the basis of the perturbation theory. Explicit expressions for both first-order and second-order fields (in terms of the surface roughness paramete…
In previous publications we reported on the optical properties of aggregated metal systems, where the metal particles were assumed to be free-electron type with damping, and where they were assumed to be dispersed in a dielectric medium with a varying index of refraction. The main results were the shift of bulk and su…
We report measurements of C${\mathrm{O}}_{2}$ photodesorption and associated surface-conductivity changes in ZnO. The measurements show a one-to-one correspondence between the rates of those two quantities. The rates of both C${\mathrm{O}}_{2}$ photodesorption and surface-conductivity changes are initially fast, becom…
Polarized spectra of evaporated thin films of ${\mathrm{As}}_{2}$${\mathrm{S}}_{3}$ glass have been recorded before and after annealing at the glass transition temperature and compared with the corresponding spectrum of the bulk glass. The spectra of virgin films consist of several sharp molecular bands superposed on…
Mid-gap optical absorption and electron spin resonance (ESR) attributed to optically induced localized paramagnetic states have been studied in several chalcogenide glasses and amorphous arsenic for $T\ensuremath{\le}80$ K. The observation of these optically induced metastable paramagnetic centers provides the most di…
A method is proposed for estimating the free energy of cation vacancy migration in alkali halides with NaCl structure from macroscopic parameters. It is based on the calculation of the electrical and the dilatation work during the migration of the cation. The dilatation work can be calculated from the elastic constant…
The infrared reflectivity of reduced rutile $\mathrm{Ti}{\mathrm{O}}_{2\ensuremath{-}x}$ at room temperature is reported at departures $x$ from stoichiometry varying from ${10}^{\ensuremath{-}3}$ to 5 \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}2}$. The electron carriers resulting from the lattice defects…
The transport of excess holes in amorphous Si${\mathrm{O}}_{2}$ is reported as a function of field and temperature, with an emphasis on the behavior at short times ($t\ensuremath{\ge}10$ nsec) after the hole is introduced into the glass. The unusual features of the transport for $t\ensuremath{\gtrsim}{10}^{\ensuremath…
An extensive experimental and theoretical study of transient hole transport in evaporated $a\ensuremath{-}{\mathrm{As}}_{2}{\mathrm{Se}}_{3}$ unambiguously establishes that the microscopic transport mechanism is characterized by a broad distribution of individual event times. This feature leads to (i) a sample thickne…
The radiative decay of non-radiative surface plasmons excited by fast electrons on sinusoidally modulated Ag surfaces has been investigated systematically for different modulation heights. The position and half-width of the surface-plasmon dispersion of weakly modulated gratings are in agreement with theoretical value…
The association constants for the binding of various saccharides to hen egg-white lysozyme and human lysozyme have been measured by fluorescence titration. Among these are the oligosaccharides GlcNAc-beta(1 leads to 4)-MurNAc-beta(1 leads to 4)-GlcNAc-beta(1 leads to 4)-GlcNAc, GlcNAc-beta(1 leads to 4)-MurNAc-beta(1…
Abstract The magnetic properties of oxovanadium(IV) complexes of Schiff bases(I) are reported. Contrary to an earlier report that these complexes are involved in magnetic exchange, the complexes are found to be magnetically dilute. The complexes display μeff in the range 1.68–1.71 B. M. at 78–297 K with θ=2–4 K, and e…
In the manufacturing process of a submarine coaxial cable, a multitrough water cooling system is used to avoid formation of voids and to strengthen the gripping force between the insulation polyethylene and the metallic center conductor. In submarine coaxial cable systems, the standards for dielectric properties of th…
<div class="htmlview paragraph">The basic working principles and the different types of multifunctional catalysts for “three way systems” are reviewed. Test methods for multifunctional catalysts characterizing activity and stability are described. Ageing procedures in air may cause problems with rhodium containi…
From analysis of published data for a number of alloys, it is shown that dislocation bowing during deformation in overaged and dispersion-hardened alloys depends to a large extent on the relative shear moduli of the obstacles and the matrix, although other factors such as particle size, the nature of the particle/matr…
<div class="htmlview paragraph">THE USE OF Rh/Pt catalysts in automobile exhaust emission control is now well established. These catalysts are applicable in both the conventional CO/HC control system and the more novel TWC approach seeking to control CO, HC and NOx emissions simultaneously. During comparative in…
Abstract The examination of treating oven pollutant effects on the adhesion of RFL‐coated polyester and nylon tire cord to rubber was conducted using a hot strip adhesion test. Ozone, ultraviolet light, and ozone–ultraviolet light were examined at 140°F. Nitrogen oxides, sulfur dioxide, and air were tested at 320°F. O…
Abstract The adsorption of nitroxide spin probes on smectites solvated in liquids of greatly different polarity was studied using electron spin resonance (ESR) spectroscopy. Adsorbed probes demonstrate various degrees of restricted rotational motion and alignment at the silicate surfaces, depending upon the properties…