Materials Literature
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Magnetic and thermal properties of the compound ${\mathrm{Dy}}_{5}{\mathrm{Si}}_{2}{\mathrm{Ge}}_{2}$ (orthorhombic, ${\mathrm{Sm}}_{5}{\mathrm{Ge}}_{4}$--type) have been studied. This compound orders antiferromagnetically at $56\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ $({T}_{N})$, with a positive paramagnetic Curie tem…
Abstract The miscibility of CA/P(VP‐ co‐ MMA) blends was examined as a function of DS of CA and the VP fraction in the copolymer composition, in an extension of the previous studies on cellulose ester blends using P(VP‐ co‐ VAc) as a counter component. It was observed by DSC thermal analysis that when CA of DS ≤ 2.5 a…
Abstract A facile two‐step synthesis for branched poly(isoprene)s (PI) based on polyaddition of AB n ‐type macromonomers is described. The synthesis of the macromonomers was achieved by anionic polymerization of isoprene and subsequent end‐capping of the polymers by addition of chlorodimethylsilane to the living carba…
Total x-ray diffraction and atomic pair distribution function analysis have been used to determine the atomic ordering in nanocrystalline (∼1. 5n m in size) CeO2‐ZrO2 prepared by a sol‐gel route. Experimental data show that the oxides are a structurally and chemically inhomogeneous mixture of nanoscale domains with cu…
Molecular simulation is used to determine the fracture strength of single-walled carbon nanotubes (SWNT) containing different concentrations of randomly distributed point defects. The results are analysed using Weibull statistics, and the dependence of the statistical distribution of fracture strengths on defect conce…
The solubility of artemisinin in ethanol + water was measured at several concentrations and over the temperature range of (278.2 to 343.2) K. The solubility of artemisinin in ethanol and water mixture increases with the increase in temperature and with ethanol concentration. The solubility data were correlated with a…
Apatites commonly adopt P6(3)/m hexagonal symmetry. More rarely, monoclinic chemical analogues have been recognized, including the biologically significant hydroxyapatite, Ca(10)(PO(4))(6)(OH)(2), but the driving force towards lower symmetry has not been systematically examined. A combination of diffraction observatio…
Uniform illumination of the mask is a key factor for the lithography process. The requirements of Immersion Lithography make illumination systems even more complex e.g. by adding additional parameters like polarization and improved throughput. Arrays of refractive microoptics are the ideal solution for high transmissi…
The crystal structures of two members of the homologous series Ca(n)(Nb,Ti)(n)O(3n + 2), with n = 5 and 6, are presented within the superspace formalism. A common (3 + 1)-dimensional superspace model is used to describe the crystal structures of both compositions within a particular homologous series, where the primar…
We apply epsilon-machine spectral reconstruction theory to analyze structure and disorder in four previously published zinc sulfide diffraction spectra and contrast the results with the most common alternative theory, the fault model. In each case we find that the reconstructed epsilon-machine provides a more comprehe…
The interaction between composite colloidal particles composed of a spherical core and grafted AB-diblock polyampholytes (diblock copolymers with oppositely charged blocks) are investigated by using a coarse-grained model solved with Monte Carlo simulations. The B block is end-grafted onto the core of the colloid and…
A description of the tilt of octahedra in ABX(3) perovskite-related structures is proposed that can be used to extract the unique values for the tilt parameters varphi, theta and delta of ABX(3) structures with regular and distorted octahedra up to the point symmetry \bar 1, from atomic coordinates and lattice paramet…
The feasibility of synthesizing metal–oxide–metal (MOM) heterojunction nanowires in the Au–TiO 2 –Au system is demonstrated. The synthesis method presented here entails sequential electroplating of Au and electro-deposition of amorphous titanium oxide (TiO x ) inside nanoholes of anodic aluminium oxide (AAO) templates…
In experiments conducted at the Bio-CARS beamline 14-BM-C (APS, Argonne National Laboratory, USA), Streptomyces rubiginosus D-xylose isomerase (EC 5.3.1.5) crystals were used to test the effect of cryogen temperature on radiation damage. Crystals cooled using a helium cryostat at an 8 K set temperature consistently sh…
Arsenates with arsenic in octahedral coordination are very rare. The present paper provides an overview of all known M(+) arsenates(V) containing octahedrally coordinated arsenic (M(+) = Li, Na, K, Rb, Cs, Ag) and the crystal structures (determined from single-crystal X-ray diffraction data) of the following seven new…
Abstract A simple method to fabricate polymer nanocomposites with single‐walled carbon nanotubes is reported, in which the nanotubes were reacted with poly( L ‐lysine) by using high‐speed vibration milling. The nanocomposites obtained were characterized by Fourier transform infrared (FT‐IR), UV–Vis spectroscopy, and t…
Metallic ruthenium capping layers ~2 nm thick protect and extend the lifetimes of Mo/Si multilayer mirrors used in extreme ultraviolet lithography (EUVL) applications. However, Ru-capped mirrors experience a loss of reflectivity after prolonged exposure to EUV radiation. In the present work, we use ultrahigh vacuum su…
Abstract Network‐like nanostructures made from the nonlinear optical material beta barium metaborate (β‐BaB 2 O 4 , β‐BBO) have been successfully synthesized from a BBO gel precursor by a sol–gel method. The homogeneous BBO gel precursor is prepared by the hydrolysis and condensation of barium acetate, sorbitol, and b…
Simulations are used to address the effects of oscillating shear strain on jammed systems composed of spherical particles. The simulations show that shear oscillations with amplitudes of more than a few percent lead to substantial crystallization of the system. To ensure that the conclusions are independent of the sim…
The effect of temperature and time of heating of zinc oxide and boric acid in aqueous medium on product type, dehydration behavior, crystal morphology, and structure was investigated for the production of flame retardant and smoke suppressant zinc borate. Two different products dehydrated at 140 and 350 °C were obtain…