Materials Literature
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Low-frequency noise, in the range 1–500 Hz, is measured at room temperature in samples of Au/PS/SCS/Al structure with a layer of porous silicon. Numerical values of the Hooge parameter α H are estimated and the dependence of α H on the composition of the gaseous environment, where the sample is placed, is determined.…
Abstract To enhance the heat resistance of poly(styrene‐co‐acrylonitrile‐co‐butadiene), ABS, miscibility of poly(styrene‐co‐acrylonitrile), SAN, with poly(styrene‐co‐n‐phenyl maleimide), SNPMI, having a higher glass transition temperature than SAN was explored. SAN/SNPMI blends casted from solvent were immiscible rega…
STUDIES OF ACTINIDES REDUCTION ON IRON SURFACE BY MEANS OF RESONANT INELASTIC X-RAY SCATTERING K.O. Kvashnina 1 , S.M. Butorin 1 , D.K. Shuh 2 , K. Ollila 3 , I. Soroka 1 , J.-H. Guo 4 , L. Werme 1,5 and J. Nordgren 1 Department of Physics, Uppsala University, Box 530, 751 21 Uppsala, Sweden Chemical Sciences Division…
ABSTRACT Synchrotron radiation (SR) methods have been utilized with increasing frequency over the past several years to study topics in actinide science, ranging from those of a fundamental nature to those that address a specifically-targeted technical need. In particular, the emergence of microspectroscopic and fluor…
The asymmetric unit of the title compound, C(18)H(24)O(6)·H(2)O, contains a 14-membered macrolide mol-ecule and a water mol-ecule. In the crystal structure, intra-molecular C-H⋯O and O-H⋯O hydrogen bonds help to stabilize the mol-ecular conformation, while inter-molecular O-H⋯O hydrogen bonds link the mol-ecules, form…
The field of diffraction from an axicon irradiated by a He-Ne laser has been studied. For this purpose the diffracting surface of the axicon is conceptually divided into tangential Fresnel regions. It is shown that evaluation of the Fresnel integral from only the first region provides a correct pattern of spatial dist…
Abstract The asymmetric membranes based on cellulose acetate are mainly applied for separations in aqueous systems and in reverse osmosis processes, although they can also be used in the so‐called salinity process of energy generation. These applications require membranes with considerable water permeability and high…
Measurements of thermopower S(a)(T) along the highly conducting a axis and specific heat of the Bechgaard salts (TMTSF)(2)ClO(4) for various cooling rates through the anion ordering temperature T(a) = 24 K were carried out. Sign reversal in S(a)(T) is found below T(a) and it decreases with increasing cooling rate, whi…
A resonant-type balanced composite right/left-handed (CRLH) coplanar waveguide (CPW) structure based on split ring resonators (SRRs) is presented. An equivalent circuit model is used to describe its complicated behaviour. As the higher cutoff frequency of the left-handed (LH) band and the lower cutoff frequency of the…
The title compound, K(4)Sb(2)SnF(14), is built from anionic layers, with an overall composition of [Sb(2)SnF(14)](4-) extending parallel to the ac plane, and K(+) cations. The layers are made up from vertex-sharing centrosymmetric SnF(6) octa-hedra and Sb(2)F(12) dimers. The Sn-F distances are in the range 1.9581 (14)…
In the title complex, [CoCl(2)(C(21)H(19)N(3))], the Co(II) atom is coordinated by one pyridine and two imine N atoms and by two chloride anions in a distorted trigonal bipyramidal geometry. The structure exhibits a pseudo-mirror plane through the metal atom, two chloride anions and the pyridine ring. In the crystal s…
Starre Carboxylatlinker ermöglichen die gerichtete Aggregation von Ni6-substituierten Polyoxowolframaten unter Hydrothermalbedingungen, wie G.-Y. Yang et al. in ihrer Zuschrift auf S. 3973 ff. beschreiben. Die Umsetzungen ergeben ungewöhnliche ein-, zwei- und dreidimensionale organisch-anorganische Polyoxometallatstru…
A possibility to induce a planar defect in a plane-layer structure of a cholesteric liquid crystal via an external electric field is shown experimentally. The results of studies of behavior of the selective reflection (transmission) coefficient of light for a layer of the cholesteric liquid crystal, where planar defec…
By virtue of their long-ranged nature, elastic stresses due to dislocations may provide a mechanism for the spatial organization of alloys with misfitting constituents. Here, we first explore the connection between dislocation patterning and correlations in elastic stress fields associated with dislocations. Specifica…
North Carolina State University Theses Nuclear Engineering.
A model for the transformation of an Al-Cu-Fe icosahedral quasicrystal into a crystal with a B2-type phase is proposed. The model is based on two assumptions: (1) the main building block for the quasicrystal structure is a hierarchical dodecahedron composed of two icosahedral clusters, coinciding with two different se…
The effect of dopant concentration and annealing in the oxidizing atmosphere on the structural, optical, and electrical properties of ZnO:Er films deposited on sapphire substrates by the electron-beam evaporation method is investigated. The optical and electrical properties of these films were studied by UV-VIS-IR abs…
We examine the dependence of atomic properties on a new atomic size, rcnZ, that has been rigorously defined by the presence of an interaction without depending on the strength or nature of the interaction. We have thus related the static dielectric polarizability radius, rα, the inverse of the first ionization potenti…
We present an analysis of recent [M. Yogi et al., J. Phys. Soc. Jpn. 75, 124702 (2006)] Sb-NQR measurements of the heavy-fermion superconductor ${\text{PrOs}}_{4}{\text{Sb}}_{12}$ and the related La-doped series of superconductors ${\text{Pr}}_{1\ensuremath{-}x}{\text{La}}_{x}{\text{Os}}_{4}{\text{Sb}}_{12}$. We find…
Novel behaviors arising from the coupling between the built-in surface electric field, piezoelectricity, electron-hole pairs and external light beam were observed in GaN nanorods. An increase in the optical excitation density resulted in a blueshift in the photoluminescence spectra and a redshift in the frequency of t…