Materials Literature
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Compounds from the solid solution ${\mathrm{Eu}}_{y}{\mathrm{Fe}}_{4\ensuremath{-}x}{\mathrm{Co}}_{x}{\mathrm{Sb}}_{12}$ were synthesized and found to crystallize in the partially filled skutterudite-type structure ${\mathrm{LaFe}}_{4}{\mathrm{P}}_{12}.$ The maximal Eu content gradually decreases from practically full…
Langmuir monolayers are good model systems for investigating the use of organic templates to control the growth and morphology of calcium carbonate. We investigate the structure of the organic–mineral interface using molecular dynamics methods. The monolayer consists of octadecanoic (stearic) acid molecules; the calci…
The surface-enhanced Raman scattering (SERS) spectra of guanine and its alkylated derivatives 7-methylguanine (7-MeG) and 9-ethylguanine (9-EtG) adsorbed to a silver colloid and a silver electrode are reported. The influence of the pH and the surface potential are studied. The interaction between the three molecules a…
Using a new charge-compensation strategy, we designed neutral molecules with perfectly planar C(C)(4)-type tetracoordinate carbon arrangements (ptC) employing DFT computations. These designs, based on the planar preference of methane dications, replace two remote carbons in spiroalkaplanes by borons or two remote hydr…
Iron oxide nanoparticles were synthesized inside 5 μm polyelectrolyte capsules. The capsule wall, made of polyelectrolyte multilayers of poly(styrenesulfonate) (PSS) and poly(allylamine hydrochloride) (PAH), is permeable for small ions but not for polymers. To perform particle synthesis exclusively in the capsule inte…
Sodium dodecyl sulphate (SDS), a detergent that mimics some characteristics of biological membranes, has been found to affect significantly fibril formation by a peptide from human complement receptor 1. In aqueous solution the peptide is unfolded but slowly aggregates to form fibrils. In sub-micellar concentrations o…
Abstract Crosslinking of homemade low‐density polyethylene (LDPE) was performed by electron‐beam (EB) irradiation. The gel content of the EB‐exposed LDPE was determined by the solvent‐extraction method. The degree of crosslinking was also evaluated by a hot set measuring test. The results obtained from both the gel–so…
Under well-controlled conditions, different polypyrrole variants can be galvanostatically prepared in acetonitrile + 1% H 2 O by changing the current density. At current densities down to 0.25 mA/cm 2, PPy(I) is electrosynthesized; at lower current densities, a mixture of PPy(I) and PPy(II) is generated. In the presen…
A low-temperature solution-based synthetic method was developed for the large-scale synthesis of one-dimensional nanostructures of alkali titanates. Two kinds of highly pure ribbonlike titanates were synthesized successfully in gram quantities without introducing any templates or catalysts. The structure and compositi…
A non-layer-shrinkage fluorinated ferroelectric liquid crystal compound, 8422[2F3], has been characterized by means of optical, x-ray, and calorimetric methods. The orientational distribution within macroscopic volumes, determined through wide-angle x-ray scattering and birefringence measurements, was found to be iden…
The synthesis and photophysical characterization of a generation 1 dendrimer containing four coumarin 2 laser dyes at the periphery and a perylenebis(dicarboximide) derivative at the core are described. It was found that 99% of the UV light absorbed by the peripheral coumarin 2 donor chromophores is transferred throug…
Time-resolved Faraday rotation is used to study both transverse and longitudinal spin relaxation in chemically synthesized CdSe nanocrystals (NC's) 22--80 \AA{} in diameter. The precession of optically injected spins in a transverse magnetic field occurs at distinct frequencies whose assignment to electron and exciton…
The advent of synchrotron sources has led to an increasing availability of high resolution Compton Profiles J(pz) and a consequent renewed interest in the reconstruction of the corresponding full momentum densities rho(p). We present results of applying a new method in which the radial parts of rho(p) and the measured…
Superperiodic patterns with a long distance in a nanographene sheet observed by STM are discussed in terms of the interference of electronic wave functions. The period and the amplitude of the oscillations decrease spatially in one direction. We explain the superperiodic patterns with a static linear potential theoret…
Molecular dynamics simulations are used to examine how thermal transport is affected by the presence of one or more interfaces. Parameters such as film thickness, the ratio of respective material composition, the number of interfaces per unit length, and lattice strain are considered. Results indicate that for simple…
We study phases and phase transitions that can take place in the recently discovered bow-shaped or bent-core liquid-crystal molecules. We show that to completely characterize phases exhibited by such bent-core molecules a third-rank tensor T(ijk) order parameter is necessary in addition to the vector and the nematic (…
Rules are given for determining special directions in the Brillouin zone which optimize the descrip-tion of various physical quantities with Gamma1 type symmetry. We consider the cubic, hexagonal, tetragonal and trigonal (e.g. Bi) lattice. These rules allow us to construct, in all of momentum space, quantities which h…
We report structural and magnetic properties of multilayers composed of thin layers of the half metallic ferromagnetic Heusler compound Co2MnGe and layers of Au, Cr and the Heusler compound Cu2MnAl. The hysteresis loops measured at low temperatures reveal the existence of an exchange bias field HEB in all of these mul…
We have investigated electronic structures of La$_3$S$_4$ and Ce$_3$S$_4$ using the LSDA and LSDA+$U$ methods. Calculated density of states (DOS) are compared with the experimental DOS obtained by the valence band photoemission spectroscopy. The DOS at $E_{\rm{F}}$ indicates the 5$d$ character in La$_3$S$_4$ and 4$f$…
The effects of $n$-type carrier doping by Li intercalation on magnetism in undoped and Co-doped anatase TiO$_2$ are investigated. We have found that doped $n$-type carriers in TiO$_2$ are localized mainly at Ti sites near the intercalated Li. With increasing the intercalation, local spins are realized at Ti. In the ca…