Materials Literature
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We report on self-consistent polymer reference interaction site model (PRISM) calculations as well as molecular dynamics (MD) simulations for several types of polyolefins. For all polymer types one single set of potential parameters was used. In general we find good semi-quantitative agreement between PRISM and MD res…
The dc conductivity of MoO 3 -TeO 2 glasses prepared by melt quenching has been investigated in the temperature range 323-473 K. Seebeck coefficient measurements indicate the glasses to be n-type. The conductivity increases with increase of MoO 3 content and at 418 K varies from about 6 × 10 -6 to 1 × 10 -8 S cm -1 .…
We are studying the phase behavior of a suspension of platelike colloids which has a very broad size distribution, particularly in thickness. This suspension exhibits an isotropic−nematic phase separation over a notably wide range of particle concentrations, displaying a remarkable phenomenon. In part of the coexisten…
The crystal structure and growth kinetics of melt-crystallized poly(butylene succinate-co-14 mol % ethylene succinate) [P(BS-co-14 mol % ES)] copolyester have been investigated at a wide crystallization temperature range of 30 to 90 degrees C. By means of wide-angle X-ray diffraction (WAXD), the copolyester composed o…
We report the results of Hall coefficient R_H and magnetoresistance (MR) measurements on single crystalline samples of Sr3Ru2O7 grown by the floating zone method. R_H was found to be positive over the entire temperature range studied (0.3 - 300K). Its temperature (T) dependence follows closely that of the magnetic sus…
Structural and magnetic properties, especially the magnetocrystalline anisotropy of DyFe 12- x Nb x compounds with x = 0.55-0.85, have been investigated. The easy magnetization directions at room temperature for all the compounds are along the c -axis. With decreasing temperature the magnetocrystalline anisotropy chan…
The influence of the strain state on the thermodynamics of hydrogen in quasi-two-dimensional potentials is reported. The host lattice is V embedded in Fe in the form of a Fe/V(001) superlattice, which represents a strongly confined absorption potential extending over just 13 monolayers. Δ H and Δ H for the continuous…
Structural and magnetic properties of the RFe 11- x Co x Ti compounds with R = Y and Er have been investigated. X-ray diffraction patterns and thermomagnetic curves show that all the synthesized compounds with x ranging from 0 to 11.0 are almost single phase and crystallize in the ThMn 12 -type structure. Substitution…
A few studies of alkali atoms deposition on the (110)-rutile surface have been reported in the last years. The process involves a selective electron transfer from the alkali atoms to the surface penta-fold Ti atoms, and it has been well characterized by both experimental and theoretical techniques. However, the adsorp…
Abstract Different metal tetrasulfophthalocyanines and rose bengal were employed as photosensitizers in the photooxidation of phenol, cyclopentadiene and (S)‐(−)‐citronellol. Ionically polymer bound photosensitizers were easily obtained by the reaction of negatively charged low‐molecular‐weight phthalocyanines with th…
By examining how the spin- and/or charge-fluctuation exchange can contribute to pairing instabilities, we propose that a spin-triplet f-wave-like pairing with a d-vector perpendicular to the b-axis may be realized in $(\mathrm{TMTSF}{)}_{2}{\mathrm{PF}}_{6}$ due to (i) a quasi-one-dimensional Fermi surface, (ii) a coe…
The first purely organic BEDT-TTF spin−Peierls system, β‘-(ET) 2 SF 5 CF 2 SO 3, has been confirmed using a high-frequency electron paramagnetic resonance (EPR) cavity perturbation technique. The material exhibits the characteristics of a quasi-one-dimensional (1D) Heisenberg antiferromagnetic spin system above 30 K,…
Rates of advancing and receding menisci motion, v, under applied pressure difference Δ P in thin methylated quartz capillaries were investigated for trisiloxane solution−gas and trisiloxane solution−silicone oil systems. Dynamic values of the tension of wetting were calculated from the v (Δ P ) dependence. Both dynami…
Abstract The in vitro degradation behavior of the polyester/polyether copolymer based on polycaprolactone/poly(ethylene oxide)/polylactide (PCEL) significantly depends on the caproxyl (CL)/lactyl (LA) ratio for the same poly(ethylene oxide) (PEO) content. The PCEL copolymer with rich CL units shows the crystalline str…
Three novel metal polytellurides Rb(4)Hg(5)(Te(2))(2)(Te(3))(2)Te(3) (I), [Zn(en)(3)](4)In(16)(Te(2))(4)(Te(3))Te(22) (II), and K(2)Cu(2)(Te(2))(Te(3)) (III) have been prepared by solvothermal reactions in superheated ethylenediamine at 160 degrees C. Their crystal structures have been determined by single-crystal X-r…
We have developed an experimental setup to facilitate study of the surface reactions of single-crystal silicon with Fourier transform infrared (FTIR) spectroscopy in a variety of aqueous environments. Employing a short optical path length through the silicon sample allows access to the critical low-frequency region of…
Three new linear compounds of the type Co(3)(dpa)(4)X(2), where dpa is the anion of di(2-pyridyl)amine and X is NCS(-) (5), CN(-) (6), and N(CN)(2)(-) (7), have been prepared, and their structures and magnetic behavior have been studied. In all of them, including three different solvates of 5, the Co(3) chains are sym…
The problem of superspreading has recently attracted much attention both from the theoretical point of view and because of the practical use of the phenomenon. However, up to now there is no general agreement about the mechanism of the effect and on the necessary conditions for its realization, in particular regarding…
Sixteen crystal structures have been determined for the Co3(dpa)(4)Cl2 (1) molecule in the following five crystalline solvates: 1.0.85(C2H5)(2)O.0.15CH2Cl2 (at 120, 213, 296 K); 1.C(4)H(8)O (at 120, 295 K); 1.C(6)H(6) (at 170, 213, 260, 316 K); 1.C(6)H(12) (at 120, 213, 295 K); and 1.1.75C(7)H(8).0.5C(6)H(14) (at 90,…
We report the formation of monomeric and aggregated tetrakis( p -sulfonatophenyl)porphyrin encapsulated within an aluminosilicate mesostructure, specifically MCM-41, under different pH conditions. It was necessary to stabilize the synthesized MCM-41 through use of a silylation reagent, (aminopropyl)triethoxysilane, wh…