Materials Literature
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We demonstrate spatially resolved polarization encoding of nonlinear information by all-optical poling of photoisomerizable and nonlinear molecules in polymer films. The second harmonic generation (SHG)polarization responses of the photo-induced patterns are imaged by a nonlinear microscope with 2 microm lateral resol…
Patterned electrodes on porous substrates, where the contacts to address these electrodes are hidden on the back of the substrates are described. To demonstrate the applicability of this method in fabricating organic electronic devices, a reflective-type polymer electrochromic device is constructed. A 7-pixel numerica…
Abstract Blends of polyamide 12 (PA12) with styrene/ethylene–butylene/styrene (SEBS) and maleic anhydride grafted SEBS (SEBS‐ g ‐MA) were prepared by twin‐screw extrusion and injection molding. The morphology, mechanical properties, and dynamic mechanical properties of the blends were studied. The morphology of the bl…
Abstract The kinetics of nonisothermal decomposition of (2‐phenyl‐1,3‐dioxolane‐4‐yl) methyl methacrylate (PDMMA), 2‐hydroxyethyl methacrylate (HEMA), and vinyl‐pyrrolidone (VPy) copolymers were investigated by thermogravimetry (TG) and differential thermal analysis (DTA). The data indicated that the major weight loss…
${\mathrm{Nd}}^{3+}$ ion crystal field excitations in ${\mathrm{NdMnO}}_{3}$ single crystals have been studied by infrared transmission as a function of temperature and under applied magnetic field. Lifting of the ground state Kramers doublet degeneracy $(\ensuremath{\sim}14\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\e…
Abstract The effects of high‐temperature oxidization and reduction on the local structures of Rh in Rh/Al 2 O 3 catalysts were investigated. After oxidization at 1200 °C, XPS measurements indicated that the Rh was in a highly oxidized state. Extended x‐ray absorption fine structure (EXAFS) analysis for the highly oxid…
The surface pining effects on phase separation dynamics of polymer-dispersed liquid crystals (PDLCs) with thin cell gaps are demonstrated. Comparing various boundary conditions, the inner surfaces of the substrates with or without polyimide layers [but no rubbing] cannot provide enough anchoring force, so in either ca…
Abstract Several kinds of polyamine‐type chelating resins containing sulfide were synthesized by the reaction of polyamines, such as ethanolamine (EA), ethylenediamine (EDA), diethylenetriamine (DETA), and triethylenetetramine (TETA), with poly[4‐vinylbenzyl (2‐benzenesulfonate ethyl) sulfide] (PSMP), which was itself…
alpha-Helical peptide microcapsules were prepared by the emulsion-templated self-assembly of amphiphilic poly(gamma-benzyl L-glutamate)s (PBLG) 1. By mixing solutions of 1 in dichloromethane (in the form of a sodium salt) with water, oil-in-water emulsions were obtained. Spontaneous stripping of the dichloromethane ph…
Close to the Mott transition, lattice degrees of freedom react to the softening of electron degrees of freedom. This results in a change of lattice spacing, a diverging compressibility, and a critical anomaly of the sound velocity. These effects are investigated within a simple model, in the framework of dynamical mea…
Diffuse x-ray scattering measurements on the cubic paraelectric phase of single-crystal ${\mathrm{PbTiO}}_{3}$ are presented. No diffuse scattering sheets are found, in contrast to sheets observed in the cubic paraelectric phases of ${\mathrm{BaTiO}}_{3}$ and ${\mathrm{KNbO}}_{3}$. A quantitative analysis of the diffu…
http://aip.scitation.org/doi/pdf/10.1063/1.4996993
Abstract We have successfully fabricated nano‐dots containing tungsten or gold from metal‐organic gas sources by electron beam‐induced deposition in an ultrahigh vacuum transmission electron microscope. The size of the dots can be controlled by changing the time for irradiation and the partial pressure of the precurso…
Abstract By in situ polycondensation, a intercalated poly(ethylene terephthalate)/organomontmorillonite nanocomposite was prepared after montmorillonite (MMT) had been treated with a water‐soluble polymer. This nanocomposite was produced to fibers through melt spinning. The resulting nanocomposite fibers were characte…
Abstract Equal‐channel angular‐extrusion (ECAE) may greatly alter polymer properties because it creates anisotropy in the microstructure. Tensile, fracture toughness, flexure, and ballistic impact tests were performed to quantify ECAE effects on polymethylmethacrylate (PMMA). Young's modulus increased by 5% for one pr…
Abstract Polyurethane prepolymers are widely used in reactive hot melt adhesives and moisture‐cured coatings. The segmented moisture‐cured formulations, based on polytetramethylene glycol (PTMG‐1000)/trimethylol propane (TMP)/isophorone diisocyanate (IPDI) and PTMG/TMP/toluene diisocyanate (TDI), were prepared with NC…
Abstract In this article, the rheokinetics of polyurethane formation and the influence of shear rate on its kinetics have been studied. Two different linear polyurethane systems with 0% and 100% hard segments are examined in a cone and plate rheometer. The isothermal increase of viscosity during polyurethane formation…
Structural changes in epitaxial ${\mathrm{La}}_{0.84}{\mathrm{Sr}}_{0.16}\mathrm{Mn}{\mathrm{O}}_{3\ensuremath{-}\ensuremath{\delta}}$ (LSMO) $(001)∕\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}(001)$ thin films are studied using x-ray scattering during thermal annealing. As oxygen atoms are incorporated during annealing ex…
The ferroelectric phase transitions of [1¯01]-, [001]-, and [111]-oriented Pb[Zn1∕3Nb2∕3]O3–4.5%PbTiO3 (PZN–4.5%PT) single crystals were investigated as a function of temperature (T between 300 and 450K), and electric field (E field between 0 and 300kV∕m) by dielectric and x-ray diffraction combined measurements. Unde…
The two-dimensional scattering of a Gaussian beam by a periodic array of circular cylinders is studied. The incident Gaussian beam is expressed as a superposition of plane waves of different amplitudes and different incident angles, using the plane-wave spectrum technique based on Fourier optics. For each plane wave,…