Materials Literature
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We describe the synthesis and the solution properties of sheet- and disclike Janus particles, containing an inner crosslinked polybutadiene (PB) layer and two different outer sides of polystyrene (PS) and poly(tert-butyl methacrylate) (PtBMA). The structures formed upon adsorption of the flat Janus particles onto soli…
Faking it: The use of a supramolecular hydrogel as the structural component of artificial enzymes provides a new and useful approach to the development of biomimetic catalysts. In toluene, hemin chloride encapsulated in such a hydrogel achieves about 60 % nascent catalytic activity of horseradish peroxidase. Additiona…
This article presents a review of expeof the effect of distrength of struence on regularity of fatigue cracks initiation and propagation in nitrided structural metallic materials. The basic regularities of static strength, low cycle fatigue and high cycle fatigue strength of structural steels after treat-ment by nitri…
Ferroelectric properties of BiFeO3 (BFO) thin films epitaxially grown on SrRuO3 (SRO)/(001)SrTiO3 (STO) structure were investigated. First, bottom SRO electrodes were deposited on STO substrates by metalorganic chemical vapor deposition (MOCVD) or by sputtering. Then, BFO thin films were deposited on SRO/STO structure…
In this paper, Pb(Zr0.53,Ti0.47)O3 films are deposited on titania by sol-gel method, and PZT films of ∼4 μm in thickness are successfully obtained by repeating multi-coating and annealing. Based on the think film deposition processing, a laminated Pt/Ti/PZT/TiO2/SiO2/Si structure is proposed, and the PZT films are in-…
A phenomenological physical model is derived for description of the P-E hysteresis behavior and simulated ferroelectric capacitor. The polarization of ferroelectric capacitors experiencing arbitrary conditions can be well depicted if we know the switching ferroelectric dipole polarization P d with respect to the elect…
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Pb(ZrxTi1 – x)O3 (PZT) sol (≥ 0.6M) was spun onto platinised silicon substrate. The single layer thickness of a dense, crack-free film up to 500 nm could be obtained. It was found that the key factor in obtaining thick crack-free films was to choose an appropriate heating profile, using a method based on the wafer def…
Xenopus violet cone opsin (VCOP) and its counterion variant (VCOP-D108A) are expressed in mammalian COS1 cells and regenerated with 11-cis-retinal. The phototransduction process in VCOP-D108A is investigated via cryogenic electronic spectroscopy, homology modeling, molecular dynamics, and molecular orbital theory. The…
We realize the planar lens of anisotropic compensated bilayer through the implementation of anisotropic metamaterials by periodic transmission-line circuits based on different unit cells of loaded microstrip grids. The electromagnetic wave propagation in such transmission-line circuits has been analyzed using microwav…
ZnO thin films were grown by cathodic deposition on indium tin oxide (ITO)-covered glass substrates from a simple aqueous zinc nitrate solution. Cyclic voltammetry (CV) experiments were performed to verify the reaction mechanism. X-ray diffraction measurements indicated that the as-grown films were of hexagonal wurtzi…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTFacile Synthesis of Semiaromatic Poly(amic acid)s from trans-1,4-Cyclohexanediamine and Aromatic Tetracarboxylic DianhydridesTomohito Ogura and Mitsuru UedaView Author Information Department of Organic & Polymeric Materials, Graduat…
In this paper, sequential experiments were designed to explore the possibility of sodium borohydride synthesis by reaction of sodium borates with Al and hydrogen. It was found that NaBH 4 cannot be formed by reaction of NaBO 2 with Al and hydrogen but can be formed by reaction of Na 4 B 2 O 5 with Al and hydrogen. NaB…
Production of OH in the reaction of the neopentyl radical with O2 has been measured by a laser photolysis/cw absorption method for various pressures and oxygen concentrations at 673, 700, and 725 K. The MIT Reaction Mechanism Generator (RMG) was used to automatically generate a model for this system, and the predicted…
The sensitivity of the torsional pendulum demonstrates the self-shape-memory effect in different types of spider draglines. Here we report the time-resolved noncovalent bonds recovery in the protein structure. The torsional dynamics of such multilevel structure governed by reversible interactions are described in the…
We observe strong softening of optical-phonon modes in superconducting $({T}_{c}=4.2\phantom{\rule{0.3em}{0ex}}\mathrm{K})$ boron-doped diamond near the Brillouin-zone center using inelastic x-ray scattering from a chemical vapor deposition grown highly oriented sample. The magnitude of the softening, and our observat…
The reaction of Nd(SePh)3 with SeO2 and Hg in pyridine gives the dodecanuclear cluster [(py)18Nd12O6Se4(Se2)4(SePh)4(Se2Ph)2Hg2(SePh)4][(Hg(SePh)3]2. In this compound the 12 Nd(III) ions are stacked in four sets of Nd3, with pairs of tetrahedral oxo ligands separating the Nd3 planes and Se, SeSe, SePh, pyridine, and H…
The cathodoluminescence (CL) spectrum of the synthetic sapphire single crystal has been studied with respect to the different crystallographic planes of the crystal in order to describe the tensorial stress dependence of the band related to oxygen defects. Experiments provide the link between CL spectral shift and str…
Ce chapitre passe en revue les progres recemment accomplis dans le developpement de membranes a conduction ionique ou mixte ionique-electronique pour la separation de l'oxygene ou de l'hydrogene a haute temperature. L'etat de l'art est essentiellement centre sur le developpement de nouveaux materiaux et d'architecture…
Abstract Proper filler‐matrix compatibility is a key factor in view of obtaining nanocomposites with well‐dispersed nanofillers displaying enhanced properties. In this respect, polymer‐filler interaction can be improved by a proper combination of matrix and nanofiller polarities. This is explored for matrices ranging…