Materials Literature
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The thermal conductivity κ and the thermoelectric properties of Si1−xGex(x⩽0.10) samples doped with B or P which were prepared by arc melting were measured as functions of carrier concentration n and temperature T in the range from 298 to 1273 K. The Si1−xGex(0.03⩽x⩽0.10) samples, doped with a small amount of B or P,…
Archaea, constituting the third primary domain of life, harbor a basal transcription apparatus of the eukaryotic type, whereas curiously, a large fraction of the potential transcription regulation factors appear to be of the bacterial type. To date, little information is available on these predicted regulators and on…
A numerical study of the effect of natural convection on the growth of succinonitrile crystals has been performed. All simulations are two-dimensional phase-field computations using an adaptive finite element method. The undercooling has been varied between 1.92 to 0. 12 K, which is within the range used in experiment…
The molecular orientation of uniaxially drawn commercial poly(vinyl chloride), PVC, specimens has been investigated by polarized Fourier transform infrared (FTIR) in the specular reflectance mode and by resonance Raman scattering in various combinations of sample orientation, scattering configuration and polarization…
The vibrational spectrum of hydrogen atoms in magnesium hydride has been studied by means of inelastic-neutron and Raman-scattering experiments between 12 and 295 K. After careful evaluation of multiple scattering and multiphonon contributions, we provide a vibrational frequency spectrum up to 180 meV and the mean-squ…
The oxidation of Ni3Al(111) at 600, 800, and 1050 K was investigated using scanning tunneling microscopy. Exposing the alloy crystal to oxygen at 600 K results in triangular shaped oxidic nuclei at low coverage. At higher coverage a rather disordered oxide layer can be observed. At 800 K, highly ordered O/Al single la…
Original composite systems with two isomorphous Laves phases $({\mathrm{DyFe}}_{2}$ and ${\mathrm{YFe}}_{2})$ have been elaborated by molecular-beam epitaxy. These superlattices combine the hard magnetic properties of ${\mathrm{DyFe}}_{2}$ with the soft ones of ${\mathrm{YFe}}_{2}.$ Moreover, they exhibit high single-…
This paper presents the effects of the joint method in the T-joint of three-phase transformer cores on iron losses. The effects of joints on the decrease of core loss have been analyzed by using FEM with E&S model, considering the hysteresis of vector magnetic properties. As a result, we can improve the T-joint part c…
This paper demonstrates that radical telomerization and atom transfer radical polymerization (ATRP) can be combined in a two-step procedure to prepare poly-(vinyl acetate)-block-polystyrene (PVOAc-b-PSt) diblock copolymers. The first step consists in telomerizing VOAc with chloroform, leading to trichloromethyl-termin…
The fracture energy of a porous silicon nitride with aligned fibrous grains was investigated, using a chevron‐notched‐beam technique. A crack was constrained to propagate normal to the grain alignment. The obtained fracture energy was ∼500 J/m 2 , which was ∼7 times larger than that of a dense silicon nitride with ran…
We calculate equilibrium configurations of telechelic associative polymer chains without excluded volume interactions between flat plates and curved surfaces, obtaining analytical expressions for flat plates and numerical results for chains between two spheres. Ideal chains with strongly but reversibly adsorbed termin…
When studying equilibrium grain-boundary segregation using the small ( approximately 1 nm) electron probe of the scanning transmission electron microscope and X-ray energy dispersive spectroscopy, the assumptions made about the size and shape of the beam-specimen interaction volume may introduce errors in quantificati…
We present a realistic model of the fragile glass-former orthoterphenyl and the results of extensive molecular dynamics simulations in which we investigated its basic static and dynamic properties. In this model the internal molecular interactions between the three rigid phenyl rings are described by a set of force co…
Abstract The thermal, mechanical, and water absorption properties of blends of nylon 6 (PA6) and acrylonitrile‐butadiene‐styrene copolymer (ABS) with and without the compatibilizer maleic anhydride (MAH) were studied. Polymers were melt‐blended using a twin screw extruder, and injection molded into sheets. Tensile and…
An analysis of distributed feedback (DFB) laser structures with metallized surface grating structures in TM polarization is presented. The modal properties of these structures are described using coupled-mode theory where the coupling coefficients are derived from rigorously computed on-resonant Floquet-Bloch solution…
In this paper the synthesis and (co)polymerizations of 4-(acryloyloxy)-ε-caprolactone are reported. This new monomer can be polymerized in a living/controlled way by two different polymerization mechanisms; atom transfer radical polymerization (ATRP) and ring-opening polymerization (ROP). ATRP, which was carried out a…
A comprehensive study of microgravity and ground-grown chicken egg-white lysozyme crystals is presented using synchrotron X-ray reciprocal-space mapping, topography techniques and diffraction resolution. Microgravity crystals displayed reduced intrinsic mosaicities on average, but no differences in terms of strain ove…
In the past years, the attention of scientists has focused mainly on the study of the genetic information and alterations that regulate eukaryotic cell proliferation and that lead to neoplastic transformation. All therapeutic strategies against cancer are, to date, directed at DNA either with cytotoxic drugs or gene t…
The nature of the low-temperature magnetic state of polycrystalline ${\mathrm{La}}_{0.67}{\mathrm{Ca}}_{0.33}{\mathrm{Mn}}_{0.9}{\mathrm{Fe}}_{0.1}{\mathrm{O}}_{3}$ has been studied by magnetization, neutron diffraction, and neutron depolarization measurements. Neutron depolarization measurements indicate the existenc…
It is proposed that the observation of orbital ordering in manganite materials should be possible at the ${L}_{\mathrm{II}}$ and ${L}_{\mathrm{III}}$ edges of manganese using x-ray resonant scattering. If performed, dipole selection rules would make the measurements much more direct than the disputed observations at t…