Materials Literature
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This review is devoted to the most recent developments (2000–2005) of sol–gel materials at the interface with biology. In the context of bioencapsulation in mineral hosts, novel synthetic approaches have been designed, allowing the immobilization of numerous proteins, enzymes and immune molecules as well as poly-sacch…
The title compound, [Cs(C12H24O6)]2[As2Se6], contains two independent centrosymmetric [As2Se6]2− counter-anions, in which AsSe3 pyramids are linked by two Se—Se bonds into a chair-shaped six-membered ring. Four of the Se atoms of the first [As2Se6]2− anion coordinate the Cs atoms of dimeric [{Cs(18-crown-6)}2(μ-As2Se6…
Abstract A series of extended 6‐substituted quinoxaline AB monomer mixtures, 2‐(4‐fluorophenyl)‐3‐[4‐(4‐hydroxyphenoxy)phenyl]‐6‐substituted quinoxaline and 3‐(4‐fluorophenyl)‐2‐[4‐(4‐hydroxyphenoxy)phenyl]‐6‐substituted quinoxaline, were prepared and polymerized to afford phenylquinoxaline oligomers. High‐molecular‐w…
Abstract In this study, Fourier‐transform Raman (FT‐RS) and infrared (FT‐IR) absorption spectroscopies were employed to characterize the molecular structures of L ‐Ala‐(3,4‐dimethoxy)‐ L ‐Phe‐PO 3 H 2 (A) and L ‐Ala‐(3,4‐dimethoxy)‐(des‐CH 2 )‐ L ‐Phe‐PO 3 H 2 (B) phosphonodipeptides, where L ‐Phe denotes L ‐phenylala…
Abstract Both linear and nonlinear viscoelastic properties of ionic polymer composites reinforced by soy protein isolate (SPI) were studied. Viscoelastic properties were related to the aggregate structure of fillers. The aggregate structure of SPI is consisted of submicron size of globule protein particles that form a…
The experimental data and theoretical views on the relations between the relaxation properties and structure of polymers are generalised. The attention is focused on the topological structural level, in particular, characteristics including the molecular mass, the molecular mass distribution, the degree of branching,…
Abstract The morphology of ionic aggregates in semicrystalline Zn‐ and Na‐neutralized poly(ethylene‐ ran ‐methacrylic acid) (EMAA) ionomer blown films has been explored with scanning transmission electron microscopy (STEM) and small angle X‐ray scattering. The ionic aggregates of Zn‐EMAA are spherical, monodisperse, a…
Abstract A boron‐containing styrenic monomer, 5‐benzyl‐2‐phenyl‐5‐(4‐vinylbenzyl)‐[1,3,2]‐dioxaborinane, was synthesized to study the influence of boron on the properties of the homopolymer and copolymer with styrene. A similar monomer without boron was also prepared and polymerized so that the properties of its polym…
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Field emission of carbon nanotubes (CNTs) grown on carbon cloth under various growth conditions has been studied. Iron sulfate or stainless steel was used as the catalyst, acetylene (C2H2) or methane (CH4) was used as the carbon source, and argon (Ar), hydrogen (H2), or ammonia (NH3) was used as the carrier gas. It is…
Abstract The fundamental components of Monte Carlo algorithms for the simulation of electron transport in matter are the differential and total cross sections for the relevant interaction mechanisms. We present different theoretical models and approximations to compute these cross sections for elastic scattering, inel…
Abstract The electronic structure, chemical bonding, and magnetic properties of 15 full Heusler alloys X 2 MnZ have been studied on the basis of density‐functional theory using the TB‐LMTO‐ASA approach and the local‐density (LDA), as well as the generalized‐gradient approximation (GGA). Correlations between the chemic…
The incorporation of acetone molecules inside the tunnels of sepiolite (SepSp-1) was monitored by a variety of techniques. By exposing sepiolite previously dehydrated at 120 °C for 20 h to acetone vapor at room temperature, acetone molecules incorporate into the tunnels of sepiolite in the minute timescale, form H-bon…
Abstract The partial‐intensity approach for simulating electron scattering is outlined, and relevant algorithms that were introduced in the past decade are presented. This is important for understanding the signal generation and surface sensitivity for a wide variety of techniques such as X‐ray photoelectron spectrosc…
Photovoltaic and optical properties of a polymer-PbS nanoparticles in polyvinyl alcohol (PVA) films and the effect of annealing in air at various temperatures on these properties are studied in this work. In the range of 1.0 to 3.7 eV, absorption spectra of PbS nanocomposite films are correctly fitted by five Gaussian…
Abstract A new dibenzo-TTF (DBTTF) derivative directly connected with amino groups has been designed and synthesized as a stable molecule in air with enhanced electron-donating ability compared with that of DBTTF. A crystal structure analysis of its TCNQ complex has shown that intermolecular hydrogen bondings are form…
Abstract Summary: Superhydrophilic modification of poly(propylene) and poly(ethylene terephthalate) films' surfaces was realized by the UV‐initiated surface photografting of a N ‐vinyl pyrrolidone/ N , N ′‐methylenebisacrylamide inverse microemulsion. AFM characterization of the treated films' surface revealed that it…
The magnetocaloric effect (MCE) of polycrystalline and single crystalline ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}\phantom{\rule{0.3em}{0ex}}(0.16\ensuremath{\leqslant}x\ensuremath{\leqslant}0.19)$ is investigated. A structural transition in close proximity to the magnetic transition has li…
Abstract In this article, different applications of Monte Carlo simulations in scanning electron microscope (SEM) critical dimension (CD) metrology are presented. A first field of application is the analysis of image formation that leads to functional descriptions of secondary electron (SE) signal profiles. From this,…
A homeotropic liquid crystal (LC) gel with submicron domain size is fabricated and its phase-only modulation property evaluated. The LC gel is highly transparent in the voltage-off state and exhibits pure phase modulation before light scattering occurs. Compared to a nanosized polymer-dispersed liquid crystal (nano-PD…