Materials Literature
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We analyze the static and dynamical properties of cooperative two-step spin-crossover solids adopting an Ising-like model where the states $+1$ and $\ensuremath{-}1$ represent the high-spin (HS) state and the low-spin (LS) state, respectively. The model consists of two equivalent sublattices with a ``ferro'' intrasubl…
This study determined the effect of water storage on flexural strength (FS) and compressive strength (CS) of 12 luting cements from different material classes. In addition, the influence of the curing method on the mechanical properties was investigated. The materials examined were two zinc phosphate cements (Harvard…
Deformed single-wall carbon nanotubes (SWCNT) are investigated through ab initio simulations as sensors to detect the presence of chemical gases. Although the viability of using undeformed SWCNT devices has been demonstrated for many molecules, there are important exceptions of toxic gases, such as carbon monoxide, wh…
For a model glass former we demonstrate via computer simulations how macroscopic dynamic quantities can be inferred from a potential energy landscape (PEL) analysis. The essential step is to consider whole superstructures of many PEL minima, called metabasins, rather than single minima. We show that two types of metab…
By means of layer resolved ion irradiation the mechanisms involved in the irradiation driven modifications of the exchange bias effect in NiFe/FeMn bilayers have been investigated. It is shown that not only the locations of the defects but also the magnetic coupling between both layers during the irradiation process i…
This paper seeks to synthesize much recent work on the HTSC materials around the latest energy resolved scanning tunnelling microscopy (STM) results from Davis and coworkers. The STM conductance diffuse scattering results in particular are employed as point of entry to discuss bosonic modes, both of condensed and unco…
We provide new data on current-driven switching in Permalloy (Py = Ni84Fe16) based nanopillars at room temperature and 4.2K that confirm and extend previously published work. We present data for both uncoupled and antiferromagnetically coupled samples. The latter confirm prior results for Co/Cu/Co. We show that insert…
Heterostructured metal−semiconductor Zn−ZnO core−shell nanobelts and nanotubes have been synthesized. The core is a belt-shaped Zn single crystal, and the shell is an epitaxially grown ZnO layer of ∼5 nm in thickness. The composite nanobelt grows along [21̄1̄0], its top/bottom being ±(0001), and side surfaces ±(011̄0)…
Abstract Electrospinning of cellulose acetate (CA) in a new solvent system and the deacetylation of the resulting ultrafine CA fibers were investigated. Ultrafine CA fibers (∼2.3 μm) were successfully prepared via electrospinning of CA in a mixed solvent of acetone/water at water contents of 10–15 wt %, and more ultra…
Abstract The melting and crystallization behavior of poly( L ‐lactic acid) (PLLA; weight‐average molecular weight = 3 × 10 5 ) was studied with differential scanning calorimetry (DSC). DSC curves for PLLA samples were obtained at various cooling rates (CRs) from the melt (210 °C). The peak crystallization temperature…
Abstract The present study was aimed at examining the effect of modes of rolling and subsequent annealing on yield locus anisotropy and its dependence on microstructure and texture. The materials, pure Cu, Cu(Cr) alloy and Cu(P) alloy, have been subjected to equal amount of cold rolling reductions by unidirectional, t…
Article Crystal structure of terbium sulfate octahydrate, Tb2(SO4)3 · 8H2O, and of dysprosium sulfate octahydrate, Dy2(So4)3 · 8H20 was published on December 1, 2003 in the journal Zeitschrift für Kristallographie - New Crystal Structures (volume 218, issue JG).
The structure characterization and dielectric properties were studiedfor a series of copper-doped calcium titanates, Ca100-x Cux TiO3, wherex =[Cu/(Cu+Ca)]% = 0.5, 1.0, 3.0 and 5.0, prepared by the conventional solidstate reaction method. X-ray diffraction analyses indicate that all samplesbelong to the orthorhombic s…
The analysis based on Rüdenberg’s well-known letter of 1951, which has been outlined for molecules in a preceding contribution, now will be transfered to translational periodic systems in one, two, or three dimensions. Again, when applied unrestrictedly to “Linear Combination of Atomic Orbitals” representations (LCAO)…
In this work Pressure Volume Temperature (PVT) data for three different liquid crystal polymers (LCPs), namely Vectra A950® and two LCPs based on 4,4′-dihydroxybiphenyl (PB-n) (where n is the number of methylene units present in the polymer) and polyethylene terephtalate (PET), were obtained for temperatures ranging f…
We report the dissociation of an a⟨100⟩ dislocation core in SrTiO3 into two (a/2)⟨100⟩ partial cores during electron-beam irradiation in a high-voltage transmission electron microscope. The partial separation is approximately 1 nm. Based on the forces acting between the partials, a dissociation mechanism is proposed w…
Liquid crystalline composite gels consisting of a low molecular mass gelator and a low molecular mass liquid crystal were prepared by two types of gelation method (continuous cooling and isothermal gelating), which provide different molecular self-assembling kinetics of the low molecular mass gelator as gelation proce…
Superconductivity often occurs in crystals with one active electron per site with charge density wave (CDW) or spin density wave (SDW) as 'mother state'. It is proposed that superconductivity is possible when the differences in equilibrium geometry and energy between the diabatic CDW and SDW states are so small that t…
In the rotational moulding process, the internal air temperature has been widely recognised as a tool to predict an optimum cycle time. This paper presents a new numerical approach to predict the internal air temperature in a two-dimensional (2-D) static model without requiring the consideration of the tumbling motion…
Abstract The first part of this series is devoted to the preparation of vinyl functionalized multiblock silicones by the process of anionic ring opening polymerization in miniemulsion. The advantage of working in dispersed media is that different scales of reactivities are found between one-chain reactions, taking pla…