Materials Literature
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To date, the structure and properties of loop fancy yarns with an extended structure have not been sufficiently explored. The aim of this paper is to develop a mathematical model describing the tensile load converted to one unit of linear density for a given yarn strain of a multiplied loop yarn that is the function o…
Two-faced: Through the combination of complex structural hierarchy and chemical diversity, amphiphilic Janus particles with a superhydrophobic and a hydrophilic hemisphere self-assemble at the air–water interface to form highly flexible and impregnable water-repelling layers. These layers of Janus particles have fasci…
Free methionine-R-sulfoxide reductase (fRMsr) reduces free methionine R-sulfoxide back to methionine, but its catalytic mechanism is poorly understood. Here, we have determined the crystal structures of the reduced, substrate-bound, and oxidized forms of fRMsr from Staphylococcus aureus. Our structural and biochemical…
We apply a method for analyzing phase transitions to the well-known antiferromagnets ${\text{LaMnO}}_{3}$ and ${\text{CaMnO}}_{3}$ using high-resolution thermal-expansion data. The critical exponents associated with the specific heat $(\ensuremath{\alpha})$ are obtained. Within experimental error, the results suggest…
Abstract A soluble cyclic porphyrin oligomer (CPO) consisting of four 5,10‐diarylporphyrins linked by alternating azo and butadiyne bridges has been synthesised via an aminated dinickel(II) butadiyne dimer. This is the first cyclic tetramer that combines both azo and butadiyne bridges and extends the azoporphyrin fami…
Abstract Nylon/clay nanocomposites are expected materials for the great improvement of various properties with small percent addition of clay; however, the degradation behavior and the long term stability of nanocomposites have been insufficiently studied. During the thermal aging in air atmosphere, Nylon is ordinaril…
The compound [Ni(3)(tppz)(2)(NCS)(2)(H(2)O)(4)](NO(3))(4).4H(2)O [tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine and NCS = thiocyanate ligand] consists of trimeric units, where the three Ni(II) cations are linked by two bis-tridentate tppz ligands. This compound crystallizes in the monoclinic space group C2/c, with Z = 4,…
Abstract Ar plasma‐induced graft polymerization of poly(ethylene glycol) (PEG) on Ar plasma pretreated poly(methyl methacrylate) (PMMA) surfaces was carried out to improve the antistatic properties. The surface composition and microstructure of the PEG‐grafted PMMA surfaces from plasma induction were characterized by…
Porcelain string insulators are widely used in high-voltage transmission lines. Calculation of potential distribution is extensively performed in the design and development of high-voltage insulators. This article applies a three-dimensional electromagnetic analysis program to calculate the potential distribution of 2…
The synthesis of precisely defined nanoscale hybrid materials remains a challenge at the frontier of chemistry and material science. In particular, the assembly of diverse high-aspect ratio one-dimensional materials such as gold nanorods and carbon nanotubes into functional systems is of ever increasing interest due t…
Abstract The main drawback of rotational molding is a long stay (several dozens of minutes) of polymer in melt state at high temperature in atmospheric air. To prevent any significant polymer thermal degradation, it is necessary to define, preliminary, a processing window in a temperature‐molar mass map. The objective…
The well-established presence of histidine donors in binding sites of Ni-containing biomolecules prompts the study of orientational preference and stereodynamic nature of flat monodentate ligands (L = imidazoles, pyridine and an N-heterocyclic carbene) bound to planar N(2)SNi moieties. Square planar [N(2)SNiL](n+) com…
A kinetic model is developed to elucidate the nucleation rate of oxide islands during the initial stages of oxidation of metals. Our theoretical analysis shows that the nucleation of oxide islands requires a critical oxygen pressure below which the nucleation rate is practically equal to zero and increases dramaticall…
A phase-change thermochromic system was designed through the reversible transformation of the 4-substituted flavylium dye 4-(2-carboxyphenyl)-7-diethylamino-4'-dimethylamino-1-benzopyrylium into its leuco form, in the presence of a developer (ethyldiisopropylamine) and a suitable solvent (e.g., acetonitrile, n-pentade…
We review here several multiscale methods that we have developed to determine dislocation properties and interactions in metals. The review includes: (1) dislocation core properties in fcc and bcc metals; (2) the effect of solutes or nanoprecipitates on the mobility of a screw dislocation in bcc metals; (3) the intera…
The first-order resonant Raman spectra of the deformed single-walled carbon nanotubes (SWCNTs), suffered from both tensile and torsional strains, have been studied within the nonorthogonal tight-binding model. It is found that: (1) two kinds of the strains almost do not change the frequencies of the low-energy Raman m…
A new ohmic contact technology on diamond with low resistivity is presented. A Si/Al metallisation is used and leads to a 7×10−6 Ω.cm2 specific contact resistivity, measured by the transfer length method. Comparison is made between this technology and the Ti/Pt/Au traditional technology. Both technologies show very go…
In recent years, immense interest has been paid to biomolecular architecture with the aim of protein assembly in two dimensions on solid substrates, and the construction of clay–protein ultrathin films (CPUFs). An overview is provided of recent research on hybrid ultrafilms or nanofilms of clay mineral layers and prot…
Two isostructural cadmium(II) complexes, [Cd(L1)(NO 3 ) 2 (H 2 O)] · CH 3 OH (1) and [Cd(L2)(NO 3 ) 2 (H 2 O)] · CH 3 OH (2), derived from the Schiff bases 4-bromo-2-[(2-piperazinylethylimino)methyl]phenol (L1) and 4-chloro-2-[(2-piperazinylethylimino)methyl]phenol (L2), respectively, were prepared and structurally ch…
A naturally-inspired phase-only diffractive optical element with a circular symmetry given by a quasi-periodic structure of the phyllotaxis type is presented in this paper. It is generated starting with the characteristic parametric equations which are optimal for the golden angle interval. For some ideal geometrical…