Materials Literature
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We have attempted to synthesize an oxadiazole compound which has ability of anion sensing and of fluorescent pattern construction. Organic soluble oxadiazole molecule with adjacent hydroxyphenyl groups for excited-state intramolecular proton transfer (ESIPT) was synthesized. Significant UV-vis absorption and fluoresce…
The strain relaxation and its effect on the in-plane superlattice formation of epitaxial La0.67Sr0.33MnO3 (LSMO) thin films on the (LaAlO3)0.3(Sr2AlTaO6)0.7 (001) [LSAT (001)] substrates were investigated as a function of film thickness by x-ray diffraction. Rocking curves and reciprocal space mappings around (002) an…
The authors report on a detailed Raman study of N–In codoped p-type ZnO thin films with the hole density ranging from 7.30×1016to2.30×1018cm−3. In addition to the identification of E2(high) modes of ZnO and InN at ∼434 and ∼488cm−1, respectively, clear coupled longitudinal-optical phonon-hole-plasmon modes have been o…
Second harmonic generation of a 16-nm-thick ultrathin Pb0.35Sr0.65TiO3 film and a 243-nm-thick Pb0.35Sr0.65TiO3 film grown on (001) MgO substrates by pulsed laser deposition is investigated. It is concluded that in the ultrathin film the ferroelectric phase is still present and the diffuse phase transition is absent.…
We report for the first time to our knowledge optical waveguiding in an organic crystalline waveguide produced by ion implantation. Using H+ ions a refractive index barrier suitable for waveguiding has been realized in the highly nonlinear optical organic crystal 4-N, N-dimethylamino-4'-N'-methyl-stilbazolium tosylate…
Abstract Linear‐dendritic ABA triblock copolymers containing PEG were used for transport the small guest molecules such as 5,7‐dibromo‐8‐hydoxy quinoline, ibuprofen, and Congo red. Nanocarriers containing guest molecules were soluble in water and in some of the organic solvents. Encapsulated guest molecules were solub…
The effects of molecular crowding on small molecule diffusion and chemical reaction rate coefficients are investigated. The systems considered comprise a random distribution of stationary spherical obstacles occupying a volume fraction ϕ of the system and a large number of small molecules whose dynamics are followed.…
Abstract Effect of clay on mechanical, thermal, moisture absorption, and dielectric properties of polyimide‐clay nanocomposites was investigated. Nanocomposites of polyimide (ODA‐BSAA) hybridized with two modified clay (PK‐802 and PK‐805) were synthesized for comparison. The silicate layers in the polymer matrix were…
It is reported that standing surface-plasmon-polariton (SPP) waves can cause regular thickness undulations of thin polymethyl methacrylate (PMMA) films above a metallic substrate. Ripples, rings, and hillock arrays with long-range order were found. Numerical calculations reveal that periodic in-plane temperature profi…
The authors report the fabrication of (Ba0.6Sr0.4)TiO3 (BST) film on Pt∕Si(001) substrate without Ti adhesion layer by magnetron sputtering. X-ray diffraction technique is used to characterize the orientation and phase purity of BST/Pt heterostructure. It is found that both BST and Pt films are (111) textured. The (11…
Abstract The effects of incorporating 5‐ tert ‐butylisophthalic acid ( t BI) and 1‐3/1‐4 cyclohexanedimethanol (CHDM) in the polymer chain of poly(ethylene terephthalate) (PET) on the crystallization behavior and thermal, optical and tensile properties of this polyester (PETGB) were evaluated. These random copolyester…
The concept and design of acoustic Bragg mirrors and cavities made of multilayers of piezoelectric oxides with superior acoustic performance and potential applications in electronic and optical terahertz modulators are described. With these applications in mind the authors have grown phonon mirrors consisting of BaTiO…
The magnetic phase transition and magnetocaloric effect are investigated on ε-(Mn0.83Fe0.17)3.25Ge compound. A large positive magnetic entropy change ΔSM is observed, which is accompanied with a field-induced metamagnetic transition from a collinear to a triangular antiferromagnetic configuration in this antiferromagn…
The authors introduce variable liquid crystal (LC) pretilt angles via ion beam (IB) irradiation of silicon carbide (SiC) layers of various compositions. To control the composition of the SiC layer, the authors altered the rf power ratio between the graphite target and silicon target. The pretilt angle of the silicon-r…
Abstract Mechanically strong and flexible strips of cellulose acetate were used to support a thin coating of poly(3,4 ethylenedioxythiophene) : poly(styrene sulfonic acid) PEDOT : PSS, an intrinsically conducting polymer (ICP), formulated with an aqueous dispersion of judiciously chosen copolymer of vinyl acetate and…
Abstract Blends of polypropylene (PP) and silicone masterbatch (SMB PP )—a commercial formulation consisting of an ultrahigh molecular weigh polydimethylsiloxane (PDMS) dispersed in PP—were prepared by melt mixing in an internal mixer. Four binary blends with different SMB PP content and two ternary blends containing…
Detailed field- and temperature-dependent ac susceptibility data on single-crystal ${\mathrm{La}}_{0.73}{\mathrm{Ba}}_{0.27}\mathrm{Mn}{\mathrm{O}}_{3}$, while confirming the applicability of Heisenberg model exponents, indicate that the associated scaling law extends over a wide region of the $(H,T)$ plane around ${T…
Abstract This paper describes the synthesis and characterization of a series of TRITON™ X‐based surfactants with a predominantly alkyl phenol ethoxylate (APE) backbone and carboxylic or amino chain ends. Three carboxylic acid‐containing TRITON X (or APE)‐derivatives, [OPE2‐COOH], [OPE5‐COOH], and [OPE10‐COOH], were pr…
The authors employ a rigorous theory to study the electromagnetic resonances in double split rings of circular cross sections. The inter-ring interactions split each single-ring mode to two modes with different symmetries, and the bianisotropy of each mode is suppressed as two rings approach. They obtain analytical ex…
The influence of high electric fields on the charge stripe order in ${\mathrm{Nd}}_{1.67}{\mathrm{Sr}}_{0.33}\mathrm{Ni}{\mathrm{O}}_{4}$ was studied by means of simultaneous hard x-ray diffraction and electrical transport experiments. Direct measurements of the charge stripe satellite peaks in zero and high electric…