Materials Literature
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A transition matrix method is commonly used to deal with the problems of either plane-wave scattering from or the Green's function of a generalized anisotropic medium. This method, although rigorous analytically, introduces numerical breakdown, when the layers are electrically thick and the waves are evanescent. A var…
In our previous paper [Phys. Rev. B 44, 2046 (1991)], results of high-resolution transmission electron microscopy (HRTEM) at each stage of the complicated hysteretic phase transformation of 1T-${\mathrm{TaS}}_{2}$ are described. Here, on warming from the commensurate (C) phase to the incommensurate (IC) phase, the tri…
A lattice-dynamics approach to acoustic emission during plastic deformation of crystals is proposed. First the dynamics of a dislocation interacting with transverse acoustic waves is investigated on the basis of a microscopic Frenkel–Kontorova model in which the rigidity of the substrate is relaxed. It is shown that t…
The functionalization of amphiphilic quaternary ammonium salts with properly chosen interacting endgroups constitutes an easy way to produce novel liquid crystal-line materials with diversified physical properties.1 Additional cyano endgroups introduce dipole-dipole interactions susceptible to strongly affect the liqu…
The preparation of 4′-alkyl- and 4′-alkoxy-4-cyano-3-fluorobiphenyls by four different procedures is described and discussed; the best method involves palladium(0)-catalysed coupling of arylboronic acids and 4-bromo-(or 4-iodo-)-2-fluorobenzonitrile. The effects on transition temperatures of fluoro substitution ortho…
An efficient algorithm is derived for generating all possible seamless carbon nanotube structure models. This makes use of multijugate helical lattices, a concept borrowed from some biological structures. Principles for helicity and structure analysis of carbon nanotubes using high-resolution electron microscopy and i…
The crystal quality of new nonlinear-optical/ferroelectric crystal LaBGeO5 was examined by measuring wavelength dependence of the second harmonic intensity under the phase matching condition at λ = 1.314 μm. The effective interaction length I eff was determined as 1.28 mm, which was 73% of the actual length. The ferro…
β-NiAl thin films were prepared by physical vapor deposition (PVD) either on thin PVD Al2O3 films on Si substrates or on sapphire single crystals. These samples were characterized by x-ray diffraction and electron spectroscopies [Auger electron spectroscopy and x-ray photoelectron spectroscopy (XPS)]. Crystalline film…
Radiation vulcanization of raw EPDM in the presence of polyfunctional monomers; diallylamine, diallylsulphide, ethylene glycol dimethacrylate, NN-methylene bis-acrylamide, triallyl cyanurate, trimethyloyl propane trimethacrylate and tetramethylol methane tetraacrylate has been carried out. The efficiency of the monome…
V and MgO films of various thicknesses were deposited on the (001)MgO surface of a MgO substrate by molecular beam epitaxy to prepare two different interfaces: V[sbnd]MgO and MgO[sbnd]V. Cross-sectional specimens were prepared from … V/MgO/V/MgO multilayers and the V[sbnd]MgO and MgO[sbnd]V interfaces were investigate…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPrediction of Metal Hydride Heat Transformer Performance Based on Heat Transfer and Reaction KineticsM. Ram Gopal and S. Srinivasa MurthyCite this: Ind. Eng. Chem. Res. 1995, 34, 7, 2305–2313Publication Date (Print):July 1, 1995Publication History Published online1 May 2002P…
The title compound, crystallized from the solution produced by dissolution of thorium carbonate in hot, aqueous picric acid ( Hpic , 2,4,6-trinitrophenol) as pale yellow needles, has been the subject of a room-temperature single-crystal X-ray study and found to be [( pic )(H2O)6Th(µ-OH)2Th(OH2)6( pic )]( pic )4.20H2O.…
Abstract Irradiation of neat PVC at λ inc = 254 nm under air induces the formation of conjugated double bonds, (CHCH) n (quantum yield ϕ ≈︁ 1.6 · 10 −4 for n = 3). Simultaneously, CCl bonds are split (ϕ ≈︁ 8 · 10 −2 ). With the aid of FTIR spectroscopy the following oxidation products were detected: OH, CHCHC…
Theoretical investigation is made into ion sound propagation and damping in strongly coupled plasmas near the Wigner crystallization of the ion subsystem. Sound velocity grows with the strengthening of the coupling, and sound decay is due to ion viscosity. The transition from the collisional mechanism of viscosity to…
Abstract Sequential irradiation with monochromatic light of 500, 480, 460, 430 nm of CdS nanocrystals (Q-CdS), whose average diameter was 4.9 nm with the standard deviation of 2.0 nm, steadily narrowed the size distribution to finally give a Q-CdS colloid having an absorption spectrum characteristic of highly monodisp…
In the atmospheric corrosion of copper, nickel, and iron, the adsorption of water affects the corrosion rates. Knowledge of water adsorption and metal oxyhydroxide formation is important in understanding the atmospheric corrosion process. The adsorption of water on copper, nickel, and iron in humid air is accompanied…
Abstract Both the inner surface and the void system of different cellulose regenerate fibers are investigated with X‐ray small angle scattering. Thereby it turns out that all fibers have a void system of 0.01 to 0.1% (volume fraction 10 −4 –10 −3 ). However, the amount of the void system has little influence on the me…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsothermal Crystallization of End-Linked Poly(tetrahydrofuran) Networks. 2. Molecular Weight DependenceHiroshi Takahashi, Mitsuhiro Shibayama, Manabu Hashimoto, and Shunji NomuraCite this: Macromolecules 1995, 28, 16, 5547–5553Publication Date (Print):July 1, 1995Publication…
2, 6-Diacetylpyridine (N-benzoyl)glycylhydrazone, dapbgh, has been prepared and characterised. Lanthanide metal complexes of the empirical formula [Ln(dapbgh)2] C13.H2O, where Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy and Y, have been synthesized and characterised by elemental analyses, electrical conductance, magnetic susc…
Abstract Adsorption of Triton X‐100 on various silica substrates has been investigated. A number of solids, including a natural quartz, this quartz washed with HCl acid and subsequently heated at 1273 K; two aerosils and one Kieselgel silicas were studied. These solids exhibit surface areas in the range of 5 to 430 m…