Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Verbeekite, ideally PdSe 2 , monoclinic with space-group choices C 2/ m , C 2 or C m ; a = 6.659(7), b = 4.124(5), c = 4.438(6) Å, ß = 92.76(3)°, V = 121.7(4) Å 3 ; a : b : c = 1.6147:1:1.0761, Z = 2, is a new, very rare, primary mineral, intimately associated with secondary oosterboschite {(Pd,Cu) 7 Se 5 },…
The characterization and application of a multi-element Ge solid state detector in time-domain laser pump, x-ray probe (LPXP) x-ray absorption fine structure (XAFS) using a third-generation synchrotron source (Advanced Photon Source or APS) are described. In particular, the following problems are discussed: (1) proper…
Up-conversion luminescence properties and energy transfer processes in Nd3+, Yb3+, and Tm3+ co-doped ZrF4-based fluoride glasses have been studied under 800 nm light excitation. Blue up-converted emission around 478 nm which can be assigned to the Tm3+: 1G4→3H6 transition, was strongly observed. Up-conversion luminesc…
The space group theoretical analyses and assignment of the lattice modes of the KDP crystal have been made, and the Raman spectra of their growth solution have been observed in different growth regions. The attention is focused on the analysis of the 912 cm-1 band arising from the H2PO4- anions in the interface betwee…
This paper presents a numerical simulation of the first negative corona in SF 6 at atmospheric pressure, in a point-to-plane electrode system. A few experiments are first carried out in order to acquire a basic knowledge of the physical processes involved in the first negative corona. Since it does not seem convincing…
Supramolecular structures of polyaniline (PANI) and vanadium oxide (V2O5) have been assembled via the electrostatic layer-by-layer (ELBL) technique. Strong ionic interactions and H-bonding impart unique features to the ELBL films, which are distinct from cast films obtained with the same materials. The interactions we…
The intrinsic hysteresis of a ferroelectric bilayer with an antiferroelectric interfacial coupling is studied within the framework of the Transverse Ising Model. We find it is possible to exit triple hysteresis loops once the parameters of the two slabs are selected appropriately. The effects of the thickness, the int…
<abstract language="eng">The Ti-6Al-4V alloy used as biomaterial has been used over the last years. The literature shows controversies concerning the kind and the chemical composition of the film naturally and elctrochemically formed on the surface of the titanium alloy. The presente work studies the film compos…
Two recent experiments have shown dramatic changes in molecular dynamics when the size of the glass formers is reduced to the nanometre scale but in opposite directions. The first is a dielectric relaxation study by Anastasiadis et al. of the local segmental α relaxation in 1.5-2.0 nm poly(methyl phenyl siloxane) (PMP…
High‐temperature oxidation behavior, microstructural evolution, and oxidation kinetics of additive‐free α‐, β‐, and mixed silicon nitride ceramics is investigated. The oxidation rate of the ceramics depends on the allotropic ratio; best oxidation resistance is achieved for ceramics rich in α‐phase. Variations in the o…
We report an experimental system dedicated for high-resolution and low-temperature photoemission spectroscopy installed on the helical-undulator beamline of a compact 700 MeV electron-storage ring (HiSOR) at Hiroshima University. A 3 m off-plane Eagle normal-incidence monochromator at the beamline covers the photon-en…
Abstract The volume proportions of the mineral phases in two strongly deformed olivine-orthopyroxene rocks have been quantified by whole-pattern stripping of fixed geometry X-ray powder diffraction data. The results were compared with the phase proportions as determined by Rietveld refinement of time-of-flight neutron…
Ge nanocrystals were produced in 4H–SiC by implantation of 250 keV Ge+ ions with a dose of 1×1016 cm−2 and subsequent rapid thermal annealing at 1400–1600 °C. Radiation damage and Ge distribution after implantation and annealing were analyzed by Rutherford backscattering spectrometry, cross-sectional transmission elec…
The extinction coefficient, k ( E ), and refractive index, n ( E ), of zinc meso -tetra porphyrin (ZnP) when incorporated into nanoporous titania were measured in the range 1.7−4.2 eV, by using a method that accounts for both the microstructure and morphology of the semiconductor matrix. Optical and fluorescence spect…
Samples of BaZr 0.95 M 0.05 O 3-α (where M = Al, Er, Ho, Tm, Yb and Y) were prepared by solid state reaction method. The bulk conductivity of the specimens under wet N 2 exposure was studied as a function of temperature, dopant ionic radius and the electronegativity of dopants. The correlation between the conductivity…
Infrared absorption spectroscopy in the multiple internal reflection geometry and hybrid density-functional cluster calculation are used to characterize the adsorption structure of hydride species that form during adsorption of disilane on $\mathrm{Si}(100)(2\ifmmode\times\else\texttimes\fi{}1)$ at room temperature. W…
In the recently developed high-sensitive CaSO 4 : Dy phosphor, sieving before the high-temperature sintering treatment has successfully eliminated particle agglomeration during subsequent sintering, and has further enhanced its thermostimulated luminescence (TSL) sensitivity to γ-rays. The reduction in TSL sensitivity…
Experiments are presented of the response of pseudoelastic NiTi wires subjected to displacement controlled cycles. A custom-built thermo-mechanical testing apparatus is used to control the background temperature field of the wire specimen while allowing the evolution of transformation fronts to be tracked by full-fiel…
We report a quantitative analysis of the detailed equilibrium atomic structure of molten linear polyethylene, obtained using directed bridging Monte Carlo computer simulation techniques. The polydisperse sample has an average chain length of 6000 backbone carbon atoms, or approximately 84000 g mol −1 . This molecular…
The average electronic polarisability of the oxide ion (α O2- ), optical basicity (Λ), Yamashita-Kurosawa's interaction parameter (A) and oxygen Is (O1s) binding energy in x-ray photoelectron spectroscopy (XPS) of xBi 2 O 3 . (100-x)B 2 O 3 glasses (x=0∼65) have been examined to check correlations among them and to cl…