Materials Literature
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Abstract Mesoporous TiO2 with well-defined spherical morphologies has been synthesized under quiescent condition via the template-assisted slow hydrolysis of titanium alkoxide in environmental humidity.
Liquid crystal alignment layers of a high T g polymer containing an azobenzene moiety are prepared by photofabrication of a surface relief grating (SRG). The interference pattern of a circular and linearly polarized Ar+ laser beam generated the surface relief grating and the morphology was detected by atomic force mic…
The effects of heating rate on the sintering behavior and the dielectric properties of Ba 0.7 Sr 0.3 TiO 3 ceramics prepared by boron‐containing liquid‐phase sintering were investigated. When 0.5 wt% B 2 O 3 was added to Ba 0.7 Sr 0.3 TiO 3 , sintering was achieved at ∼1150°C, and the overdoped B 2 O 3 did not form an…
This paper describes the chemical, thermal and thermomechanical characterization of curaua fiber. The research of the thermal and thermomechanical properties of natural fibers is of major interest, considering their increasing utilization in several applications, and the large temperature range to which the fibers are…
The inhibition of protein adsorption to the surfaces of biomedical devices is a crucial requirement for avoiding implant-associated infections or thrombus formation on blood-contacting artificial surfaces and thus for increasing the long-term biocompatibility of the devices. Here, the use of surface plasmon resonance…
A new evaluation method and its application are discussed in detail for the determination of some important statistical parameters of a dislocation assembly, namely the average dislocation density, the average fluctuation of the dislocation density and the average polarization, from the X-ray diffraction line profile.…
Effects of film stresses on the phase stability and various ferroelectric properties of the epitaxially oriented $\mathrm{Pb}(\mathrm{Zr},\mathrm{Ti}){\mathrm{O}}_{3}$ thin film were theoretically investigated. For this purpose, a two-dimensional thermodynamic model was developed using the Landau-Devonshire phenomenol…
Abstract A study is presented of increasing the toughness of Cyclic Olefin Copolymer (COC) while maintaining its optical transparency. The COC consists of a random copolymer of ethylene and norbornene, and the impact modifiers consist of thermoplastic elastomers. It is shown that several requirements must be satisfied…
Devitrification of a frit (glass) based on the oxide system SiO 2 –Al 2 O 3 –ZnO–CaO was studied. The following major crystalline phases were identified: gahnite (ZnAl 2 O 4 ), willemite (Zn 2 SiO 4 ), and a solid solution exhibiting an anorthite structure. A kinetic model was used to fit the experimental results. The…
The four compounds in the series from chloro[subphthalocyaninato]boron(III) to chloro[subnaphthalocyaninato]boron (III) where synthesized in a one-pot reaction. To obtain a more soluble set of compounds, the mixture was then reacted with the sodium salt of trihexylsilanol. This mixture was separated by chromatography…
This article consists of the two parts. In the first part the nature of jute fiber, productivity, advantages, disadvantages, its composition etc. have been described. The jute fiber is also compared with the glass fiber. Inspite of some advantages, this natural fiber possess some drawbacks and thus needs chemical modi…
In situ whisker growth was observed during heat treatment of allylhydridopolycarbosilane (AHPCS) and SiC powder in the temperature range of 1250°–1350°C. TEM equipped with an electron energy loss spectrometer (EELS) verified that the banded whiskers are twinned single‐grained β‐SiC. Convergent beam electron diffractio…
Article A model for the adsorption of polyelectrolytes on pulp fibers: Relation between fiber structure and polyelectrolyte properties was published on December 1, 2000 in the journal Nordic Pulp & Paper Research Journal (volume 15, issue 5).
Formulae for estimating statistical uncertainties in quantitative phase analysis using the Rietveld method and the whole-powder-pattern decomposition method have been derived. The relative magnitude of statistical uncertainty for a derived weight fraction of a component in a mixture is given by σ( W m )/ W m = (1/ W m…
Translucent, colored magnets, which would open up new possibilities in optomagnetic devices, could potentially be realized in the form of molecule-based magnets composed of metal complexes. A new class of colored, magnetic thin films, prepared electrochemically and composed of KIaVII/IIIxCrII1–x[CrIII(CN)6]y, is repor…
Nonstoichiometric 10‐mol%‐excess‐BaO–BaTiO 3 (Ba 1.1 TiO 3.1 ) thin film grown on a (100) SrTiO 3 substrate consisted of heteroepitaxial c ‐axis‐oriented BaTiO 3 perovskite crystals including Ruddlesden–Popper planar faults and nanometer‐scale multiple (111) twin lamellae. High‐resolution electron microscopy and elect…
The light-induced high-spin-->low-spin relaxation for the Fe(II) spin-crossover compounds [Fe(btpa)](PF6)2 and [Fe(b(bdpa))](PF6)2 in solution, where btpa is the potentially octadentate ligand N,N,N',N'-tetrakis(2-pyridylmethyl)-6,6'-bis(aminomethyl)-2,2'-bipyridine and b(bdpa) is the analogous hexadentate ligand N,N'…
Synthesis of hexacelsian barium aluminosilicate (BaAl 2 Si 2 O 8 or BAS) from BaCO 3 , Al 2 O 3 , and amorphous SiO 2 was examined. BaCO 3 can react with SiO 2 and Al 2 O 3 to form barium silicates (Ba 2 SiO 4 or B 2 S, BaSiO 3 or BS, and BaSi 2 O 5 or BS 2 ) and barium aluminate (BaAl 2 O 4 or BA). It is shown that t…
A tape‐casting process was used to prepare various Al 2 O 3 –TiC green tapes, from which laminated and functionally gradient Al 2 O 3 –TiC materials (FGM Al 2 O 3 –TiC) were produced by cutting, stacking, and laminating the material, removing the binder, and hot‐pressing the green bodies. The bending strength of the F…
Delta(5)-3-Ketosteroid isomerase catalyzes cleavage and formation of a C-H bond at a diffusion-controlled limit. By determining the crystal structures of the enzyme in complex with each of three different inhibitors and by nuclear magnetic resonance (NMR) spectroscopic investigation, we evidenced the ionization of a h…