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。
Chains of crystalline-Si nanospheres were studied by means of Raman scattering spectroscopy. We found that the one-phonon Raman scattering peak from the chains was asymmetric and broader than that from bulk Si. This phenomenon can be attributed to a phonon confinement in the silicon nanospheres. The phonon confinement…
A driving force of photoinduced surface relief (PSR) formation is examined by considering the complex electric susceptibility of the absorbing medium. It is introduced into a fluid mechanics model established for the viscous fluid layer on a flat substrate. As a result, a theoretical model for PSR formation covering t…
Abstract The tensile moduli of polystyrene/polybutadiene blends were studied with reference to the effect of the blend ratio. A comparison between the experimental results and the theoretical predictions of the tensile properties was also made. The models selected were the parallel, series, Halpin–Tsai, Takayanagi, Ke…
The crystallographic grain orientation of ZrB2-ZrC composites manufactured using a spark plasma sintering (SPS) method, a new sintering technique in development for poorly sinterable ceramic materials, was analysed by the scanning electron microscopy-electron backscattered diffraction (SEM-EBSD) method. Their crystall…
The effects of a minor chemical modification on the microscopic structure of a material in its glass and crystal phases are investigated by the concurrent use of neutron diffraction and computer simulation. Significant changes in short-, intermediate-, and long-range order are found, resulting from the change in molec…
This paper reports the effect of woven fabric construction on macroporosity properties. The area of a macropore's cross section, equivalent, maximum, and minimum pore diameters, pore density, and open porosity are observed in this research involving woven fabric construction parameters—yarn linear density, fabric tigh…
Abstract: The transcript sizes of fcp genes of Cyclotella cryptica, belonging to different fcp gene clusters and encoding different fucoxanthin chlorophyll a/c light harvesting polypeptides (Fcps), were determined. Furthermore, the diurnal expression of the fcp1/fcp2/fcp3/fcp5 gene cluster and the steady state mRNA co…
Several composites with short glass fiber of a copolymer of ethylene and 1-octene, synthesized with a metallocene catalyst, have been prepared, up to a fiber content of 40 wt.-%. The effect of the fiber on the crystalline structure and on the viscoelastic response are analyzed. The role of glass fiber incorporation on…
Porous poly(ε-caprolactone) structures have been prepared by leaching of compression moulded salt-containing polymer precipitates. Coagulation takes place when a PCL solution containing dispersed water-soluble salt particles is precipitated into an excess of non-solvent. Porous scaffolds are obtained after leaching of…
Single-mode planar waveguides were fabricated from chalcogenide glass compounds with large Kerr nonlinearities. Strong self-phase modulation of subpicosecond pulses along with low linear and nonlinear absorption losses demonstrates the potential for ultrafast, low-power, all-optical processing applications.
ABSTRACT The corrosion fatigue crack growth (FCG) behaviour, the effect of applied potential on corrosion FCG rates, and the fracture surfaces were studied for high‐strength low‐alloy steels, titanium alloys, and magnesium alloys. During investigation of the effect of applied potential on corrosion FCG rates, polariza…
Copper(II) and palladium(II) complexes of two 2,2′-bidipyrrin ligands were prepared and examined, in comparison with the known nickel(II) complexes of these ligands, by means of X-ray crystallography, cyclic voltammetry, and spectroelectrochemistry. All compounds are of helical geometry with coordination environments…
A surface-adsorbed monolayer of cap-shaped gold particles upon submicrometer-sized polystyrene spheres exhibits pronounced absorption in the visible region. When the surrounding refractive index was altered by immersion in a fluid, the direction of the shift in the absorption spectrum was dependent on the incidence an…
Polycrystalline ferroelectric SrBi4Ti4O15 thin films were prepared on Pt-coated silicon substrates by pulsed laser deposition. Structures of the films were analyzed by x-ray diffraction, atomic force microscopy (AFM) and scanning electron microscopy. At an applied field of 275 kV/cm, the films showed good hysteresis l…
Molecular dynamics simulations of [Gd(egta)(H(2)O)](-) (egta(4-)=3,12-bis(carboxymethyl)-6,9-dioxa-3,12-diazatetradecanedioate(4-)) have been performed without any artificial constraint on the first coordination sphere, such as covalent bonds between the Gd(3+) and the coordination sites. Two new crystallographic stru…
Phosphane-functionalised carbosilane dendrimers 9, 10, 11, 12, 13, 19 and 20 have been synthesised, and their palladium complexes have been used as catalysts in the allylic substitution reaction. The catalytic sites at the periphery of the dendrimer support are readily accessible to the substrate, which is reflected −…
Dielectric permittivities, polarization--electric-field hysteresis loops, and domain structures have been measured as a function of temperature in relaxor-based ferroelectric single crystals $({\mathrm{PbMg}}_{1/3}{\mathrm{Nb}}_{2/3}{\mathrm{O}}_{3}{)}_{0.68}({\mathrm{PbTiO}}_{3}{)}_{0.32}$ (PMN-32%PT) for $〈110{〉}_{\…
Using empirical-potential and tight-binding models, we study the structure and stability of atomic-scale irradiation-induced defects on walls of carbon nanotubes. Since atomic vacancies are the most prolific but metastable defects which appear under low-dose, low-temperature ion irradiation, we model the temporal evol…
Vinyl-substituted chiral salens (salen=bis(salicylidene)ethylidenediamine) are used for attachment to Me3Si-hydrophobized silica gel (controlled-pore glass, CPG), carrying covalently bound mercaptopropyl ‘substituents', by AIBN-mediated radical addition of SH groups to styryl C=C bonds (Scheme 1, Table 1, and Figs. 1…
Pulsed laser ablation in an inert gas has been used to fabricate films containing silicon nanocrystals. We show that film microstructure is one of the main factors, determining long-term photoluminescence (PL) properties. Films with different porosity were found to exhibit PL signals with quite different peak energies…