Materials Literature
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Memory in ferroelectric liquid crystals (FLCs) is well known in the literature where thickness of the cell is less than the pitch value of the material. Here, we report a thickness independent memory in a class of FLCs called the de Vries electroclinic liquid crystals. Thickness independency of memory effect is observ…
A temperature-dependent x-ray absorption spectroscopy (XAS) study was performed to investigate the changes in electronic and atomic structure of La-deficient ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.2}\mathrm{Fe}{\mathrm{O}}_{3\ensuremath{-}\ensuremath{\delta}}$ (L7S2FO3) and stoichiometric ${\mathrm{La}}_{0.8}{\mathrm{Sr…
Abstract The objective of this work is to understand the effect of shear force on the properties of epoxy–clay nanocomposites. The shear force was controlled by changing the revolutions per minute on a mechanical mixer. Differences in the aspect ratio of clay layers and differences of clay particle distribution in the…
What happens in between? A nonanuclear gallium(III) cluster (see structure: white H, gray C, red O, orange Br, beige Ga) is a potential intermediate in the assembly of a dinuclear helicate. The cluster could be isolated because of conformational restrictions at the ligand which disfavor the formation of the triple-str…
Abstract Environmental concerns associated with the level of volatile organic compounds used in surface coatings have stimulated increased scientific research toward novel methods of developing environment‐friendly coatings. Prototype wood finish products containing polymerized whey proteins (PWP) were formulated. The…
Effiziente Leuchtstoffe finden sich bei Verbindungen aus der Familie β-NaLnF4 (Ln=Y, La–Lu). Durch Kombination von Einkristall-Tieftemperaturabsorption und diffuser Röntgenstreuung konnten zwei kristallographisch nicht äquivalente spektroskopische Lagen eindeutig identifiziert werden. Die hohe Lichtausbeute dieser Leu…
Abstract Biaxially oriented linear low density polyethylene (LLDPE) films were produced using the double bubble process with different machine direction (MD) orientation levels and the same transverse direction (TD) blow‐up ratio. Their mechanical behavior was characterized in terms of the tensile strength and tear re…
Psoralen photophysics has been studied on quantum chemistry grounds using the multiconfigurational second-order perturbation method CASPT2. Absorption and emission spectra of the system have been rationalized by computing the energies and properties of the low-lying singlet and triplet excited states. The S1 pipi* sta…
Abstract Summary: SAXS was used to investigate the morphological responses of two commercial thermoplastic poly(ether‐ co ‐urethane) elastomers during repeated uniaxial extension and stress‐relaxation at constant strain. Experimental data was analysed using a ‘globular’ morphological model, which has previously been s…
Einfach, aber gut: Das leicht zu handhabende und umweltverträgliche Oxone erzeugt Singulettsauerstoff, der unter milden Bedingungen selektiv und mit guten bis ausgezeichneten Ausbeuten para-Alkylphenole 1 oxidativ zu para-Peroxychinolen 2 desaromatisiert. Auch para-Chinole 3 können in einem Eintopfverfahren aus 1 durc…
Anode tubes coated with thin and dense electrolyte layers were fabricated by thermoplastic coextrusion, using a nickel oxide (NiO)–yttria‐stabilized zirconia (YSZ) composite and YSZ as the anode and electrolyte materials, respectively. The initial feedrod with a diameter of 22 mm, comprised of three thermoplastic comp…
The bacterial phosphoenolpyruvate (PEP):glycose phosphotransferase system (PTS) mediates uptake/phosphorylation of sugars. The transport of all PTS sugars requires Enzyme I (EI) and a phosphocarrier histidine protein of the PTS (HPr). The PTS is stringently regulated, and a potential mechanism is the monomer/dimer tra…
The reflection resonance spectrum of a subwavelength diffraction-grating-coupled waveguide is used to analyze biomolecular interactions in real time. By detecting this resonance wavelength shift, the optical waveguide biosensor provides the ability to identify the kinetics of the biomolecular interaction on an on-line…
Gadolinium(III)-modified polycrystalline lead titanate (PbTiO3) of 1.0mol% dopant level was investigated by means of multifrequency electron paramagnetic resonance spectroscopy in order to determine sign and size of the local-environment sensitive finestructure parameter B20. The Gd3+ ions were assigned to substitute…
We report on the effects of a low-frequency electric field on the optical nonlinear response of thin dye-doped liquid crystal cells. Experimental data show that the external field allows reaching extremely high values of the optical nonlinearity without any critical control of the cell interfaces. A qualitative interp…
Thin films of single c-domain/single-crystal (1−x)Pb(Mg1∕3Nb2∕3)O3−xPbTiO3 (PMN-PT) with x≅0.33 near a morphotropic boundary composition were heteroepitaxially grown on (110)SRO∕(001)Pt∕(001)MgO substrates. The heteroepitaxial growth was achieved by rf-magnetron sputtering at the substrate temperature of 600°C. After…
Wechselhafte Taktizität: Die Ringöffnungspolymerisation von rac-β-Butyrolacton (rac-BBL) in Gegenwart eines sechsfach koordinierten Yttriumkomplexes mit dianionischem Amin-Bis(phenolat)-Liganden als Initiator ergibt bei Raumtemperatur Poly(3-hydroxybutyrat) (PHB) mit bis 94 % Syndiotaktizität und enger Molekulargewich…
The polarization fatigue behaviors of ferroelectric Pb1−xSrx(Zr0.52Ti0.48)O3 (PSZT) thin films deposited on Pt-coated silicon wafers are investigated. Significantly enhanced fatigue endurance with increasing Sr doping and decreasing temperature is observed, and the almost fatigue-free performance up to 1010 switching…
By means of thorough atomistic simulations an energy-based theory, named quantized fracture mechanics, is commented and validated. This approach modifies continuum linear elastic fracture mechanics by introducing the hypothesis of discrete crack propagation, taking into account the discreteness of the crystal lattice.…
Abstract A reactive extrusion process was developed improving the rheological properties of PET via the coaddition of a dianhydride and polyol. Specifically, the coaddition of pyromellitic dianhydride (PMDA) with pentaerythritol resulted in a gel‐free polyester with superior melt strengths and viscosities compared to…