Materials Literature
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The perturbed angular correlation (PAC) technique was used to study the hyperfine interactions in the antiferromagnetic and paramagnetic regions of the distorted perovskites ${\mathrm{LaCrO}}_{3}$ and ${\mathrm{LaFeO}}_{3}.$ The dilute ${}^{111}{\stackrel{\ensuremath{\rightarrow}}{\mathrm{In}}}^{111}\mathrm{Cd}$ nucle…
Here we consider how phase-separation kinetics and morphology are affected by the preferential wetting of a solid surface by one component of a binary fluid mixture. The behaviour is crucially dependent upon whether the spinodal decomposition is bicontinuous-type or droplet-type, i.e. the composition symmetry. Near a…
The surface structure of anatase ${\mathrm{TiO}}_{2}(001)$ was investigated using scanning tunneling microscopy (STM), x-ray photoelectron spectroscopy (XPS), reflection high-energy electron diffraction (RHEED), and low-energy electron diffraction (LEED). A two-domain $(1\ifmmode\times\else\texttimes\fi{}4)/(4\ifmmode…
Photoinduced orientational behavior of a polymethacrylate (CN6) and a polyester (p6a12) with p -cyanoazobenzene side chains was studied to reveal the structural effect of the liquid crystalline polymer backbones. Irradiation with linearly polarized UV light resulted in the reorientation of the azobenzene for both poly…
The first direct evidence for second-order nonlinearity in partially cross-linked polyacrylonitrile is reported. The cross-linking in γ-ray-induced polymerized neat acrylonitrile is well supported by UV−vis spectroscopy, FTIR, and 13 C CP/MAS solid-state NMR. The second harmonic generation (SHG) powder test was employ…
Six new actinide metal thiophosphates have been synthesized by the reactive flux method and characterized by single-crystal X-ray diffraction: Cs(8)U(5)(P(3)S(10))(2)(PS(4))(6) (I), K(10)Th(3)(P(2)S(7))(4)(PS(4))(2) (II), K(5)U(PS(4))(3) (III), K(5)Th(PS(4))(3) (IV), Rb(5)Th(PS(4))(3) (V), and Cs(5)Th(PS(4))(3) (VI).…
A theoretical model of the effect of inhomogeneous broadening on the luminescence lineshape of ${\mathrm{Cr}}^{3+}$ is developed and applied to the disordered system ${\mathrm{Cr}}^{3+}:{\mathrm{LiTaO}}_{3}.$ At ambient pressure, ${\mathrm{Cr}}^{3+}$ occupies primarily low-field sites in ${\mathrm{LiTaO}}_{3}$ and exh…
We address the problem of the interpretation of heavy nucleus spin-spin couplings for systems being studied in solution. Solvation can create counterintuitive features concerning the spin-spin couplings, which are enhanced by relativistic effects due to the presence of heavy nuclei. This should therefore be taken into…
Polystyrene and poly(methyl methacrylate) copolymers with cyclophosphazene side groups have been prepared by the reactions of azidocyclophosphazenes with diphenylstyrylphosphine residues in the copolymer structures. The cyclophosphazene pendent groups were present in from 1 to 100% of the monomer residues in polystyre…
Abstract Monomers derived from 3,4‐ethylenedioxythiophene and phenylenes with branched or oligomeric ether dialkoxy substituents were prepared with the Negishi coupling technique. Electrooxidative polymerization led to the corresponding dialkoxy‐substituted 3,4‐ethylenedioxythiophene–phenylene polymers, with extremely…
The recombinant Escherichia coli strain, equipped with the newly cloned Aeromonas PHA biosynthesis genes, could produce a terpolymer of 3-hydroxybutyrate (3HB), 3-hydroxyvalerate (3HV), and 3-hydroxyhexanoate (3HHx) [P(3HB-co-3HV-co-3HHx)] from dodecanoic acid plus odd carbon number fatty acid. In addition, the orf1 g…
A quantitatively repeatable protocol was developed for poly(3-hydroxybutyrate) (PHB) production by Escherichia coli XL1-Blue (pSYL107). Two constant-glucose fed-batch fermentations of duration 25 h were carried out in a 5-L bioreactor, with the measured oxygen volumetric mass-transfer coefficient (k(L)a) held constant…
Zein films plasticized with oleic acid have been considered potentially useful for biodegradable packaging applications. However, moisture was found to affect their tensile and gas barrier properties. We investigated the effects of two converting processes, fusion lamination and coating with drying oils, on tensile pr…
Several new large polyoxotungstates have been synthesized by reaction of lanthanide cations with the well-known "As(4)W(40)" anion, [(B-alpha-AsO(3)W(9)O(30))(4)(WO(2))(4)](28-) (1). The heteropolyanions [(H(2)O)(11)Ln(III)(Ln(III)(2)OH)(B-alpha-AsO(3)W(9)O(30))(4)(WO(2))(4)](20)(-) (Ln = Ce, Nd, Sm, Gd) (2-4) (Ln(3)A…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTDiradical Dications of m- and p-Phenylenebis[2,5-di(2-thienyl)-1-pyrrole]: Weakly Coupled DiradicalsVictor M. Domingo, Carlos Alemán, Enric Brillas, and Luis JuliáView Author Information Departament de Química Orgànica Biològica Institut d'Investigaciones Químiques i Ambientals…
We studied angle-dependent reflectivity spectra of opal photonic crystals infiltrated with cyanine dyes, which are highly polarizable media with very large Rabi frequency. We show that when resonance conditions between the exciton-polariton of the infiltrated dye and Bragg frequencies exist, then the Bragg stop band d…
At a coverage of about 1/3 monolayer, Sn deposited on Ge(111) below 550 forms a metastable (sqrt3 x sqrt3)R30 phase. This phase continuously and reversibly transforms into a (3x3) one, upon cooling below 200 K. The photoemission spectra of the Sn 4d electrons from the (3x3)-Sn/Ge(111) surface present two components wh…
We consider an interesting and practically important case of elastic domain structure, which is the analogue of c/a domain pattern with 90$^\circ$ walls in perovskites, and is solvable analytically for arbitrary misfit strain. There is no critical thickness, below which the domain structure cannot exist, when the "ext…
Nanosphere lithography (NSL) is an inexpensive, simple to implement, inherently parallel, high throughput, materials general nanofabrication technique capable of producing an unexpectedly large variety of nanoparticle structures and well-ordered 2D nanoparticle arrays. This article describes our recent efforts to broa…
Abstract The linear viscoelastic behavior of acrylonitrile‐butadiene‐styrene (ABS) polymers in the molten state, with different degrees of grafting, was investigated within the framework of Palierne's emulsion model. The main aim of the present study is to quantitatively analyze the effect of grafting degree on the st…