Materials Literature
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Abstract We successfully prepared the superionic composites in which only the high-temperature phase of α-AgI was stabilized at room temperature in a superionic glassy matrix by a simple procedure with heating and consecutive cooling of AgI−Ag2O−MoO3 glasses. In the composites, α-AgI microcrystals were dispersed in th…
Band structure calculations of ABC2 (A = Zn, B = Si, Ge, Sn, and C = P, As) ternary pnictides performed using the semi-relativistic ‘tight binding linear muffin tin orbital’ (TB-LMTO) method within local density approximation under ambient and high pressures are reported here. The energy gap at ambient pressure is fou…
The effect of neodymium substitution on the lanthanum site in La 0.7- x Nd x Pb 0.3 MnO 3 perovskite polycrystalline has been systematically studied. The substitution of neodymium for lanthanum causes structure change from rhombohedral to orthorhombic. Ferromagnetism is suppressed as neodymium content increases. The m…
L-Malate (MalDH) and L-lactate (LDH) dehydrogenases belong to the same family of NAD-dependent enzymes. To gain insight into molecular relationships within this family, we studied two hyperthermophilic (LDH-like) L-MalDH (proteins with LDH-like structure and MalDH enzymatic activity) from the archaea Archaeoglobus ful…
We report what is believed to be the first demonstration that volume gratings diffract extreme-ultraviolet light (EUV) or soft x-rays into high orders approximately an order of magnitude more efficiently than predicted by classical thin-grating theory. At the 13-nm wavelength, copolymer grating structures with 200-nm…
A design for a novel diffractive optical element (DOE) that can reconstruct three different intensity patterns when it is illuminated by three different wavelengths is presented. If the chosen wavelengths are red, green, and blue, full-color reconstruction capability is obtained. Reconstruction is achieved in the near…
The fracture energy of superplastically forged silicon nitride, where rodlike silicon nitride grains are aligned in one direction, was investigated at high temperatures from 1100° to 1300°C and at room temperature. Bending tests using chevron‐notched beams were conducted at two displacement rates, 0.05 and 0.005 mm/mi…
Bismaleimides having electron-donating diphenylmethylamine or triphenylamine moieties (A(=)-D(*)-A(=)), as well as their saturated model compounds were synthesized. Their fluorescence behavior was found to show a strong fluorescence structural self-quenching effect (SSQE). On the basis of this strong SSQE of A(=)-D(*)…
Large ferroelectric single crystals of 0.48 Pb(Fe 1/2 Nb 1/2 )O 3 –0.52 PbTiO 3 solid solution system were first successfully grown using a modified Bridgman technique and their properties were investigated. The obtained crystals were about 25 mm in diameter, 100 mm in length and black in color. The crystal exhibited…
The specific heat measurements by means of the adiabatic calorimetry provided new information concerning the polymorphism of 5*CB. A relatively large enthalpy relaxation was observed in the vicinity of glass transition Temperature dependence of the relaxation time showed that the main contribution to the relaxation is…
In apparel production, many compressive garments such as girdles and corsets are generally made from more than one layer of elastic fabric, the layers sewn together to improve the functionality of the garments. To increase the versatility of the design and production of pressure garments used for burn rehabilitation,…
We have synthesized new high Δ n 3-ring phenylacetylene(3PA) liquid crystals which have substituent groups with core center phenyl ring and investigated the effects of substitution on physical properties. Nematic range and viscosity were improved remarkably with keeping high Δ n by introducing trifluoromrthoxy group.…
Synthetic, polycrystalline samples of alunite [K0.88(H3O)0.12Al2.64(SO4)2(OH)4.92(H2O)1.08] and oxonium-substituted alunite [H3OAl2.87(SO4)2(OH)5.61(H2O)0.39] have been investigated using incoherent, inelastic neutron-scattering (IINS) methods in or-der to determine the nature of the non-OH “H2O”. IINS measurements we…
The corrosion performance of ceramic films of SiO 2 ‐Al 2 O 3 prepared by the sol‐gel processing of organometallic compounds and deposited by dip‐coating technique on 1008 steel foils has been evaluated. Two kinds of procedures were developed to produce the sol‐gel coatings. The influence of the coatings on the chemic…
Thallium(I) complexes of 2,3,7,8,12,13,17,18-octaethylporphyrin and 5,10,15,20-tetraphenylporphyrin are shown to have two thallium(I) ions per porphyrin ligand. Syntheses, spectroscopic characteristics (UV-vis, MS, NMR), chemistry, and an X-ray crystal structure of bis-thallium(I) porphyrins are presented.
In this paper we report photo-alignment using low molecular weight dichroic materials. We produced photo-alignment by exposing thin films of dichroic materials such as methyl red, 4,4′-dihydroxyazobenzene and 4,4′-biphenol to linearly polarized light. The irradiation generates a preferred orientation of liquid crystal…
[No abstract available]
Submicron-sized cylindrical structures were obtained at the surface of silicon single crystal exposed to a compression plasma flow. A periodic structure formed by channels oriented normally to the surface was observed inside the modified surface layer. The period of the structure corresponded to the spacing of the sur…
This work consists of two sequential parts, which review the advances in uncovering the capacity of VLEED, STM and PES in revealing the nature and kinetics of oxidation bonding and its consequences for the behavior of atoms and valence electrons at a surface; and in quantifying the O–Cu(001) bonding kinetics. The firs…
This paper attempts to identify the handle and sensibility of woven silk fabrics for neckties to determine any relationships between them and purchasing preferences. Male and female students evaluate the specimens with a semantic differential scale of handle and sensibility adjectives: twenty-one hand adjectives are g…