Materials Literature
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Polycrystalline Pb(Zr,Ti)O 3 (PZT) thin films fabricated by a chemical solution deposition (CSD) process exhibited a conspicuous initial voltage shift in the D - E hysteresis loop toward the negative-bias field. It was concluded that the origin of the voltage shift was an internal bias field due to asymmetric space-ch…
Abstract A comprehensive experimental study was carried out to investigate the effects of (1) viscosity ratio, (2) temperature on the viscosity ratio, (3) extruder screw location, and (4) compatibilizers on the morphology of bisphenol‐A‐polycarbonate/acrylonitrile‐butadiene‐styrene (PC/ABS). Blends were prepared by ut…
A free-standing polyfuran (PFu) film has been successfully synthesized by electrochemical polymerization of furan at low potential (1.2 V vs Ag/AgCl) in a binary solvent system consisting of boron trifluoride−ethyl ether (BFEE) and additional ethyl ether (EE). The obtained polymer contains much less ring-opened compon…
Numerous papers have been published that include high-strain-rate experimental data obtained from Split Hopkinson Pressure Bar (SHPB) tests. There have been no standardized test specimens with differing dimensions and geometry. For this reason, it can be difficult to compare results of tests performed by other researc…
New non-symmetric dimesogens consisting of a cholesteryl moiety and an aromatic mesogenic unit interconnected through a pentamethylene spacer have been prepared. The aromatic units consist of two phenyl rings linked by carboxy, oxycarbonyl, ethylene, ethynylene, azo or Schiff's base groups. The mesomorphic and transit…
The reversible dimerization of the electrochemically or chemically generated cation radicals of diversely substituted tetrathienylenevinylenes ( 1 − 6 ) has been analyzed by concentration and temperature-dependent cyclic voltammetry, UV−vis, near-IR, and ESR spectroscopies, and time-resolved spectroelectrochemistry. F…
Theoretical descriptions of the molecular polarizability and second hyperpolarizability (α and γ) of the linear quadrupolar molecule are presented. By using a valence-bond and two charge-transfer states, three eigenfunctions of a quadrupolar molecule are obtained as linear combinations of these basis states. The analy…
Electronic transport and optical measurements in polycrystalline Pbl2 are reported as part of a study to evaluate the material for large area x-ray imaging applications. The films are deposited by vacuum evaporation with thickness 20–100 μm and have grain sizes of up to 10 μm. The room temperature hole drift mobility…
Numerical simulations of Liesegang systems are performed both with a prenucleation and a postnucleation model. Special interest is dedicated to two-dimensional morphological peculiarities of ring systems. With the prenucleation model, apparent bifurcations or branch points (anastomoses) can be created by adjacent trai…
Deformation and relaxation properties of hypercrosslinked polystyrene networks have been studied by thermomechanical method at a uniaxial compression using individual spherical beads of the polymer. The networks examined were prepared by postcrosslinking of highly swollen beads of a styrene-0.3% DVB copolymer with 0.3…
The significance of the Liftshitz/van der Waals, Lewis-acid, and Lewis-base contributors to the total surface energy of a material is discussed in terms of the molecular design features and surface organization phenomena characterizing film structures prepared from four homologous series of polymeric compounds, namely…
The ab initio tensile test has been applied to the non-polar interface of the {122}, Sigma = 9 tilt boundary in cubic SiC, where the tensile strength and mechanical behaviour at zero temperature are examined using the ab initio pseudopotential method based on the local density-functional theory. This interface is stro…
The temperature dependence of the magnetic moment in ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}$ and ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{MnO}}_{3}$ ferromagnetic manganites was studied by means of dc magnetic measurements and by NMR on ${}^{55}\mathrm{Mn}$ nuclei. In addition, for temperatur…
A new class of thiophene-based polymers characterized by the presence of one nonaromatic thienyl S, S -dioxide moiety (O) to every two, four, and six aromatic thienyl units (T) was prepared from the newly synthesized precursors TOT, TTOTT, and TTTOTTT, and electrochemically characterized. The polymers displayed remark…
Aluminum nitride (AlN) was produced via the combustion synthesis of loosely packed aluminum powder (pore fraction of ∼0.8) in a graphite reactor that was lined with permeable carbon felt. Almost‐complete conversion was achieved with a forced flow of nitrogen for beds 50‐150 mm deep (mass of 200‐650 g). The product was…
The crystal structures of Ti2AlN, Ti3SiC2, and Ti3AlC1.8, studied by high-resolution transmission electron microscopy confirmed the P63/mmc space group and the layered nature of these ternaries. The structure of Ti2AlN agrees with that previously determined from analysis of x-ray and neutron diffraction data. Converse…
Prussian blue molecule-based magnets can be designed to exhibit various magnetic properties. One of them based on chromicyanide and vanadium is a magnet at room temperature. Its properties are very sensitive to the synthetic reaction conditions, solvent effects and counterions which can be used to tune the Tc. To stud…
High‐toughness and high‐strength lead zirconate titanate (PZT) composites that contain fine silver particles were successfully fabricated at low sintering temperatures. Addition of silver to a PZT matrix did not result in unwanted reaction phases; however, some silver diffused toward the perovskite crystal structure.…
The transformation from ionic to neutral phases in tetrathiafulvalene-p-chloranil crystals is induced by exciting the charge-transfer absorption band below the transition temperature. The transformation takes place only above a threshold intensity of excitation, and the efficiency of generating neutral-phase domains i…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis of Comb-Type Biodegradable Polylactide through Depsipeptide−Lactide Copolymer Containing Serine ResiduesFumitaka Tasaka, Hidetake Miyazaki, Yuichi Ohya, and Tatsuro OuchiView Author Information Department of Applied Chemis…