Materials Literature
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Liquid crystal (LC) devices arc presented which convert linearly polarized light into linearly polarized light with axial symmetry. Their symmetry axis is determined by the propagation axis of the light beam. Such light fields can be characterized by an integer P, which we call the polarization order number. Our LC de…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation N. C. Andrews, A. J. McHugh, B. J. Edwards; Out‐of‐plane orientational dynamics of polymer liquid…
Transparent-photoluminescent Y3Al5O12:Tb (YAG:Tb) thin films were deposited on single- crystalline sapphire at two different substrate temperatures by means of the pulsed laser deposition technique. The ablation targets were fabricated from YAG:Tb powders obtained with a new ceramic processing technique (combustion sy…
The zone-drawing method (ZD) was applied to electrochemically synthesized polypyrrole films containing tosylate (PPy/TsO) and the mechanical and electrical properties of the resulting films were investigated. It was found that the electrical conductivity of the zone-drawn film reached 365 S cm−1 in the drawing directi…
The adhesion energy, G (at low separation velocities), between a rubber and a solid surface, is expected to increase when flexible chains, chemically identical to the rubber, are attached to the surface. This can be set up with or without chemical binding of the chains to the rubber (“bound” chains or “free” chains).
Thalassiosira yabei and its allied forms, which are important constituents of North Pacific high-resolution biostratigraphic framework, are taxonomically re-examined. Eleven morphotypes within the morphological variation of the diatoms previously reported as fossil marine plicated Thalassiosira have been distinguished…
The Fisher–Widom (FW) line is the locus of points in the density–temperature (ρ,T) plane where the longest range decay of the pairwise correlation function of a fluid crosses over from monotonic to damped oscillatory decay. The FW line for a hard-core potential with an attractive Yukawa tail is calculated using two in…
This research investigates the morphological evolution of diamond films in combustion synthesis as a basis for understanding the nucleation and growth mechanisms of the diamond phase. Various diamond films were synthesized from an oxyacetylene flame on a molybdenum substrate under atmospheric conditions. To identify t…
Numerically efficient Preisach-based vector hysteresis models for ellipsoidally magnetizable media are presented. Both models are based on orthogonal coupled scalar models and take into consideration the variation in particle switching fields and interaction; however, the coupling mechanism is different in the two mod…
A new model of scalar static magnetic hysteresis based on the superposition of Krasnoselkii hysterons of stop type is described. Unlike the magnetic hysteresis models known in literature, the present one naturally implements the constitutive relationship H=H[B]. In this respect it allows to formulate a field problem d…
Small-angle neutron scattering has been combined with equilibrium dynamic light scattering to study shear-induced mixing in a diluted high-molecular-weight polymer blend. The data show an enhancement of critical fluctuations upon dilution and are found to collapse onto a universal scaling curve containing no free para…
Initiation of quasicleavage (QC) cracks in delayed fracture of hydrogen charged, quenched and tempered AISI 4340 steel was studied by means of a fractographic technique. The fatal crack leading to the delayed fracture of an unnotched specimen is found not to be caused by intergranular cracking as is commonly found in…
The physical and optical properties of glasses in the As 40 S ((60 ‐ x:) Se x system where x = 0, 5,10,15, and 20 at. % Se have been investigated. The changes in the glass transition temperature, density, hardness, IR edge, and refractive index can be attributed to the presence of Se, which simply replaces S in these…
Abstract We report the crystal and electronic band structures and the electrical, magnetic, and optical properties of {bis(ethylenedithio)tetrathiafulvalene}2dicyano-silver and -gold, η-(BEDT–TTF)2M(CN)2, M = Ag or Au. The compounds belong to the monoclinic system; space group C2/c, a = 36.28(8), b = 4.286(2), c = 22.…
A model has been developed to account for the occurrence of flickers and image-stickings in TN or two-domain TN cells aligned by polyimide (PI) films with one of the films subjected to uv radiations prior to rubbings. The probability of flickers and image-stickings is proportional to the imbalance in the charge densit…
Raman spectroscopy was used to investigate PbTiO3 (PT) and 0.7Pb(Mg1/3 Nb2/3)O3-0.3PbTiO3 (PMN-PT) thin films prepared by the sol–gel technique and deposited on platinum-coated silicon, and Al2O3. The PT spectra reveal that the films are polycrystalline in nature and the frequencies of most of the modes are decreased…
We report here the purification and the crystallization of the modular protein Grb2. The protein was expressed as a fusion with glutathione-S-transferase and purified by affinity chromatography on glutathione agarose. It was apparent from reverse phase chromatography that the purified protein was conformationally unst…
The durability properties of bonded lap shear joints made from an epoxy/dicyandiamide adhesive and zinc, zinc-coated steel, two different aluminium alloys or cold-rolled steel metal coupons have been investigated. The influence of the dicyandiamide content of the adhesive on the durability properties-has been assessed…
Photoexcitation of the oxygen (O)‐to‐metal (M = W, Mo, and Nb), ligand‐to‐metal charge transfer (O→M l.m.c.t.) bands of the polyoxometallomanganates such as K 6 Na 2 [ MnW 6 O 24 ] · 12 H 2 O (1), K 6 [ MnMo 9 O 32 ] · 6 H 2 O (2), and Na 12 [ Mn ( Nb 6 O 19 ) 2 ] · 50 H 2 O (3) leads to an intramolecular energy trans…
Abstract Zinc(II) tetrasulphonatophthalocyanine (ZnPcS4−) exhibited a new absorption band (λmax 699 nm) at the longer wavelength side of the monomer absorption band in 1:49 aqueous acetonitrile. Irradiation of the new band exerted an emission (690–730 nm, λmax 710 nm) different from the monomer fluorescence.The new ab…