Materials Literature
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Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
The state of the art of electrodynamics of new composite media—metamaterials—is reviewed. The composites in the form of a periodic lattice of identical elements, which are in essence artificial crystals with characteristic scales of the internal structure from several centimeters to several hundred nanometers are cons…
A novel sol-gel autocombustion process was used to synthesize ultrafine powders of nickel ferrite. This powder was prepared from metal nitrates and citric acid. The combustion process is an oxidation-reduction reaction in which the NO 3 − ion is the oxidant and the carboxyl group is the reductant. The results revealed…
The incommensurately modulated structure of the isotropic lazurite Na6.41Ca1.36K0.04(Si6.09Al5.91)O24(SO4)1.73Cl0.17 from the Baĭkal region is solved in the (3 + 3)-dimensional symmetry group P23(γγ0) [where γ = 0.2154(1)] with the basic unit cell parameter a = 9.077(1) Å. The structure is refined to R 0 = 0.04 for th…
The objective of this study is to provide a set of proximity functions for electrons from 100 eV to 10 MeV. Numerical results of differential proximity functions are given graphically. The complete data set is available electronically upon request from the authors. The results can serve as a convenient database for an…
Crystalline materials that are transparent in the vacuum UV spectral region and currently used have been reviewed. Transmission of crystals of solid solutions with the fluorite structure Ca1−x R xF2+x (R = Sc, Y, La, Yb, Lu) in the UV and vacuum UV spectral regions has been investigated. It is shown that application o…
A choline biosensor was fabricated by using electrochemical doping to immobilize choline oxidase in poly(aniline-co-o-aminophenol) film that exhibits a good electric activity over a wide pH range. Using cyclic voltammetry, impedance measurement and scanning electron microscopy characterized the poly(aniline-co-o-amino…
The problem regarding the distribution of aluminum and indium impurities in bulk crystals of solid solutions with a variable composition Ge1−x Si x (0 ≤ x ≤ 0.3) is solved in order to establish regularities of the changes in the segregation coefficients of impurities with variations in the composition of the host latt…
Abstract Summary: A recent report by Agarwal and coworkers (I. Cotiuga, F. Picchioni, U. S. Agarwal, D. Wouters, J. Loos, P. J. Lemstra, Macromol. Rapid Commun. 2006 , 27 , 1073) has shown that solution viscosity measured in a capillary rheometer can be used to monitor the dispersion quality of SWNTs. They used soluti…
Abstract Due to the need of increasing energy efficiency, reducing pollution and lessening dependency on petroleum, vehicles using more advanced propulsion technologies such as fuel cell and hybrid electric (e.g., gasoline-electric or diesel-electric hybrid) power are being developed constantly. At the same time, exte…
This paper provides a brief review of recently published work on biophysical and biological aspects of Auger processes. Three specific questions have been considered. (1) Does charge neutralisation contribute to molecular damage such as DNA strand breaks? (2) How many DNA double strand breaks are produced by a single…
Abstract The amount of glycine added, i.e., the glycine/oxide molar ratio, k , is optimized for synthesizing La 0.85 Sr 0.15 MnO 3‐δ (LSM) powders by a glycine‐nitrate process. The specific surface area of the resultant LSM powders increases with this ratio, which indicates the deviation of the required glycine from t…
The effect of memorizing the structural states in a ferroelectric liquid crystal (FLC), known as biand multistability, is based on the existence of a domain structure that changes its properties under the action of an applied voltage. The criterion for the bistability steadiness of the optical-transmission states of F…
The use of synchrotron radiation–based spectroscopy to investigate electronic and bonding structures of nanostructured materials is reviewed with focuses on the X-ray absorption spectroscopy (XAS), valence-band photoemission spectroscopy (VB-PES), and scanning photoelectron microscopy (SPEM) measurements. This review…
Abstract Summary: Poly(2‐methoxyaniline‐5‐sulfonic acid) (PMAS) is a water‐soluble derivative of polyaniline that carries negatively charged sulfonate groups. This self‐doped conducting polymer also behaves like a polyelectrolyte that can subsequently function as a dopant in polyaniline (PAn). The chemical synthesis o…
Abstract Summary: Thiol‐reactive‐functionality decorated multi‐walled carbon nanotubes (MWNTs) have been obtained. Trithiocarbonate‐ended poly( N ‐(2‐hydroxypropyl)methacrylamide) (PHPMA) is prepared by reversible addition‐fragmentation chain transfer (RAFT) polymerization of N ‐(2‐hydroxypropyl)methacrylamide (HPMA)…
Abstract We present ab initio methods to determine the Dzyaloshinskii–Moriya (DM) parameter, which provides the anisotropic effects of noncollinear spin systems. For this purpose, we explore various general spin orbital (GSO) approaches, such as Hartree–Fock (HF), density functional theory (DFT), and configuration int…
We report an experimental study of the collapse dynamics of smectic catenoids. It is shown that in dependence on the thickness of the smectic films, different rupture scenarios take place. The change of the film thickness during the collapse process is monitored using an interference technique. We separate influences…
Nuetron diffraction studies of high-pressure effects on the crystal and magnetic structure of A1-x A ′ MnO3 manganites (A = Pr, La; A′ = Sr, Ca, Na) are reviewed. High pressure leads to various changes in the magnetic structure of manganites: the appearance of a new A-type antiferromagnetic (AFM) state in compounds wi…
Abstract Summary: A PCL macromonomer was obtained by the reaction of PCL diol with methacrylic anhydride. The effective incorporation of the polymerizable end groups was assessed by FT‐IR and 1 H NMR spectroscopy. PCL networks were then prepared by photopolymerization of the PCL macromonomer. Furthermore, the macromon…