Materials Literature
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A comparative study of the structural, magnetic, and transport properties of $\mathrm{La}{\mathrm{Mn}}_{1\ensuremath{-}x}{\mathrm{Cr}}_{x}{\mathrm{O}}_{3.00}$ perovskite samples $(0\ensuremath{\leqslant}x\ensuremath{\leqslant}0.15)$ is reported. Resistivity measurements in the paramagnetic region show a semiconductor…
We study the dynamic behaviour of concentrated colloidal hard spheres using time resolved correlation, a light scattering technique that can detect the slow evolution of the dynamics in out-of-equilibrium systems. Surprisingly, equilibrium is reached a very long time after sample initialization, the non-stationary reg…
We have studied the dependence of the cubic and uniaxial magnetic anisotropy terms in ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ on temperature $T$ and hole concentration $p$. For the purpose of this study we prepared a series of ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ layers…
Ag/cross-linked poly(vinyl alcohol) (PVA) cable-like nanostructures were synthesized with control in an aqueous solution of a hydrolysable amphiphilic block polymer, poly(vinyl acetone) (PVKA) (ketalization degree D H = 0.533) under γ-ray irradiation, via one-step in situ reduction of Ag + and cross-linking of alcohol…
Abstract A novel method to produce fluorine‐containing polyacrylate emulsion is presented. It is prepared by the copolymerization of n ‐methyl methacrylate, n ‐styrene, n ‐butyl acrylate, and α‐methacrylic acid in the presence of swollen particles of PTFE. The structure and properties of the polymers are characterized…
The plateau modulus has been measured for a trio of amorphous poly(ethylene−propylene) copolymers where the mole fraction of ethylene ranged from 0.57 to 0.67. These materials were prepared by using a living catalyst system involving bis(salicylaldiminato)titanium activated by methylaluminoxane. This catalyst with pro…
We have investigated the system ZnSnSb 2 in the course of our attempts to modify thermoelectric Zn−Sb frameworks. ZnSnSb 2 is only accessible when employing Sn as reactive flux in the synthesis. The material shows an order−disorder transition in the temperature interval between 225 and 240 °C and decomposes peritectic…
Abstract The crystalline structure of the heat‐sealed part of oriented polypropylene (OPP) and cast polypropylene (CPP) films was investigated by differential scanning calorimetry, Fourier transform infrared spectroscopy, and thermal mechanical analysis (TMA). The relationship between the crystalline structure and the…
In this paper we report electronic transport in nanostructured films of the rare-earth manganite La0.67Sr0.33MnO3. The films were grown by chemical solution deposition. The films show a resistivity peak in the temperature range of 250–265 K and have average grain size (∼50–60nm). The grain size can be controlled by po…
The photoluminescence properties of a periodically structured organic light-emitting diode are presented. Patterning is achieved using an original single-step autostructuration technique based on photoinduced effects in azo-polymer films. We show that single beam laser irradiation can lead to the induction of regular…
Abstract Electrically conducting composites based on polyaniline and polyacrylonitrile were prepared by two slightly different techniques and were characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The thermooxidative degradation of the composites was studied by simultaneous the…
We study the adsorption and wetting behaviour of colloidal hard spheres and colloidal rod-like particles at a planar hard wall using computer simulations.Our results show complete wetting by the hard-sphere crystal at the wall-fluid interface, and complete wetting by the nematic phase of the hard-rod fluid at the wall…
Abstract The synthesis and characterization of new aromatic homo‐ and copolyesters based on l‐arabinitol and xylitol are described. These polymers were obtained by polycondensation reaction of the 2,3,4‐tri‐ O ‐methyl‐l‐arabinitol or 2,3,4‐tri‐ O ‐methyl‐xylitol, or their mixtures with ethylene glycol, with terephthal…
The effects of dipolar interactions and molecular flexibility on the structure and phase behavior of bent-core molecular fluids are studied using Monte Carlo computer simulations. Some calculations of flexoelectric coefficients are also reported. The rigid cores of the model molecules consist of either five or seven s…
Using molecular dynamics simulations, we show that sheared solutions of cylindrical micelle-forming amphiphiles behave very differently under extreme confinement as compared to the bulk. When confined to ultrathin films, the self-assembled cylindrical micelles roll along the shearing direction and align parallel to ea…
Solubility data for the K 2 CO 3 + K 2 CrO 4 + H 2 O system at 40 °C, 60 °C, 80 °C, and 100 °C were determined, and the phase diagram at 100 °C was constructed. Furthermore, the crystallization areas in the phase diagram were elaborately analyzed and discussed. On the basis of the solubility data, a separation method…
[Co(Me(4)cyclam)(tropolonate)](PF(6)) was synthesised and structurally characterised. Its electronic and W-band EPR spectra have been analysed by means of the angular overlap calculation of the Spin Hamiltonian parameters that provided also a satisfactory reproduction of the temperature dependence of the magnetic susc…
We demonstrate irreversible blocking of ion channels using single-wall carbon nanotubes (SWNTs) functionalized with 2-aminoethylmethane thiosulfonate (MTSET). In contrast, as-produced and purified SWNTs exhibit reversible blocking, indicating that the MTSET molecule attached to SWNTs chemically interacts with the cyst…
We propose a method for direct calculation of an effective interface potential from computer simulation. The method allows us to locate the wetting transition, determine its order and calculate the concomitant contact angle of macroscopic drops. We illustrate the method by studying the wetting behaviour of a polymer m…
Abstract Films with alternating layers of high density polyethylene (HDPE) and polystyrene (PS) were prepared by layer‐multiplying coextrusion, using two HDPEs differing in molecular weight. The crystal structure of extremely thin PE layers confined between PS layers was studied by small angle X‐ray scattering (SAXS),…