Materials Literature
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Seebeck, electrical, and thermal conductivity data are reported on CoSb3, and doped and undoped alloys of Co1−xIrxSb3−yAsy from 20 to 700 K. n-type semiconductors were obtained by doping with Ni, Te, or Pd, and the hole concentration in p-type samples was increased by substitution of Fe, Ru, Os, and Ge. An estimated m…
We present a discrete dipole approximation (DDA) method to determine extinction and Raman intensities for small metal particles of arbitrary shape. The Raman intensity calculation involves evaluation of surface electromagnetic fields, and thus is relevant to surface enhanced Raman scattering (SERS) intensities. We dem…
The trapping parameters, namely the activation energy E, frequency factor s and b order of kinetics of the thermoluminescence (TL) peaks of calcites (brown and colourless varieties) irradiated with 4.08 kGy of gamma -rays, are determined using the least-squares curve-fitting technique. The electron lifetime tau of the…
A method was developed in the early 1960s by Harman and Honigt for testing the AC resistance and figure-of-merit, Z, of a thermoelectric material sample. This method provided a direct measurement of Z, but lacked precision and reproductibility, primarily due to the mechanical and electronic limitations of the instrume…
Based on the electro-optic Pockels effect, a modified optical measurement technique for studying residual surface charge distribution is developed. A simple relationship between the total optical retardation distribution and the light intensity distribution of the difference of the detected images is deduced. The tota…
High-quality indium tin oxide (ITO) films were deposited by reactive DC sputtering on glass and quartz substrates. Both pure H 2 O vapour and O 2 were used as reactive sputtering atmospheres. The electrical parameters, free carrier concentration and carrier mobility as well as the resistivity of the ITO films were opt…
34.4 Introduction Systematic Search Historical Review New Materials Phonon Glasses Desired Performance PGEC Relaxation of A,,. Assumption Band Gaps of Semiconductors Carrier Mobilities Background Explanation Electronegativities and Good Thermoelectric Semiconductors Dopant and Mixed-Crystal Effects on Mobilities Dopan…
Ab-initio dynamical simulation is used to study the liquid Ga-Se system at the three concentrations Ga$_2$Se, GaSe and Ga$_2$Se$_3$ at the temperature 1300~K. The simulations are based on the density functional pseudopotential technique, with the system maintained on the Born-Oppenheimer surface by conjugate gradients…
We report the first six-dimensional quantum dynamical calculations of dissociative adsorption and associative desorption. Using a potential energy surface obtained by density functional theory calculations, we show that the initial decrease of the sticking probability with increasing kinetic energy in the system H_2/P…
We construct a class of periodic tilings of the plane, which corresponds to toroidal arrangements of trivalent atoms, with pentagonal, hexagonal and heptagonal rings. Each tiling is characterized by a set of four integers and determines a toroidal molecule. The tiling rules are motivated by geometric considerations an…
A preclinical toxicology study of intraperitoneally administered liposome encapsulated doxorubicin and free doxorubicin was carried out in beagle dogs. Dogs received single intraperitoneal infusions of 1.5 mg free or 1.5, 2.25 or 3.37 mg liposomal doxorubicin/kg. One group of four dogs received 1.5 mg liposomal doxoru…
Abstract The effect of temperature, postcure, and fiber orientation on water absorption were examined for Kerimid® 723 bismaleimide resin. The effect of fiber orientation was also examined for Avimid® N and BASF X‐5260. Water absorption in Kerimid® 723 was found to have an Arrhenius temperature dependence, depend on d…
To better understand the role of shape complementarity in ligand binding and protein core interactions, the structures have been determined of a set of ligands bound within a cavity-containing mutant of T4 lysozyme. The interior cavity is seen to consist of two parts that respond very differently to the binding of lig…
Buried polar residues are a common feature of natural proteins. ACID-p1 and BASE-p1 are two designed peptides that form a parallel, heterodimeric coiled coil with a fixed tertiary structure [O'Shea, E. K., Lumb, K. J., & Kim, P. S. (1993) Curr. Biol. 3, 658-667]. The interface between the ACID-p1 and BASE-p1 helices c…
We report a simple interferometric method for simultaneous, in situ measurement of both the thickness and the depth resolved optical losses of thin transparent films. The experimental arrangement is simple requiring only a laser and a detector regardless of the substrate. The originality of our method is based on the…
Polarized Raman and infrared spectra of Li 2 Ge 7 O 15 single crystals were measured in the frequency range 5-1000 cm -1 at room temperature. The spectra are analysed within the framework of the Landau theory of structural phase transitions from a (hypothetical) fully disordered deficient structure (aristotype). The m…
Pump-probe measurements of coherent-phonon-induced changes of refractive index in LaAl${\mathrm{O}}_{3}$ are dominated by normally weak boundary effects. Atomic displacements in the range 50--500 $\ensuremath{\mu}\AA{}$ were generated and probed by femtosecond laser pulses through impulsive Raman scattering. The absen…
In this report, a diffusion analysis has been extended to a lattice containing two interstitial sites, and the results obtained are used to understand: (1) the formation of a nitrided/unnitrided N configuration for intermediate N content and (2) the abnormally small (apparent) diffusion frequency factor, both of which…
The set of partial differential equations satisfied by the phonon and phason displacement fields u and w in quasicrystals has been solved by means of Fourier transform and eigenstrain methods, and general expressions of the elastic displacement fields induced by dislocations in quasicrystals have been given in terms o…
A two-dimensional liquid droplet placed on a non-uniformly heated solid surface will move towards the region of colder temperatures if the temperature gradient in the solid surface is large enough. Such behaviour is analysed for a thin viscous droplet using lubrication theory to develop an evolution equation for the s…