Materials Literature
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Recently we developed [1] a novel liquid crystal display device employing discotic nematic material. This device exhibits the following improvements over a conventional twisted nematic (TN) display device using a calamitic nematic material. The device (i) is simple to fabricate and (ii) has excellent viewing angle cha…
This paper examines the response of circular and square plates stluck by a rigid mass at the plate centre with a sufficient initial kinetic energy to produce large inelastic deformations. A simpliiicd analysis, which retains finite-deflection effects and assumes that the plates are made of a rigid, perfectly plastic m…
Electronic structure and optical properties of the Ce3☎ in YAG has been investigated by standard spectroscopy (photoluminescence, absorption and excitation spectra) and high pressure spectroscopy. The bandshape of the emission spectrum for different pressures has been analyzed and influence of pressure on energy of th…
The behaviour of a disc-shaped specimen of knitted fabric, which is pulled through a round hole, is described in the paper. Several pulling cases related to the boundary conditions of the specimen are analysed. Comparative analysis of these cases is performed on the basis of the specimen's behavioural features (the va…
A large number of factors influence the frictional properties of fabrics. In this paper, the influence of the fabric structure on the frictional characteristics of woven fabrics is investigated. The relations between the fabric-structural-asperity index (FSAI) that is defined in this work and frictional parameters are…
Two kinds of iodide salts of 3-(4- and 3-methylpyridinium)-1,5-diphenylverdazyl radical cations ([p-MePyDV]+I− (1) and [m-MePyDV]+I− (2)) and four kinds of 1 ∶ 1 and 1 ∶ 2 salts of the same verdazyl radical cations with tetracyanoquinodimethanide (TCNQ) anion ([p-MePyDV]+[TCNQ]− (3), [m-MePyDV]+[TCNQ]− (4), [p-MePyDV]…
The electronic properties and chemical bonding of new single-walled nanotubes based on TiO2 (anatase) were studied using the tight-binding band theory and compared with hypothetical VO2 nanotubes.
The influence of particulate silica sources on growth and silicon uptake of 3 diatom species: Cylindrotheca fusiformis, Navicula sp., and Skeletonema costatum, was investigated. Each diatom strain was incubated in controlled conditions, with mineral (quartz sand and 2 pure quartz dusts with variable degree of hydrophi…
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The vapour composition and the thermodynamic properties of Cu–Zr alloys in the liquid and solid states have been studied by Knudsen-cell mass spectrometry over the temperature (701–1823 K) and composition (5.1–97.3 mol% Zr) intervals. The accessible temperature range has been enhanced by chemically generating volatile…
In the field of arterial vascular reconstructions there is an increasing need for functional small-diameter artificial grafts (inner diameter < 6mm). When autologous replacement vessels are not available, for example because of the bad condition of the vascular system in the patient, the surgeon has no other alternati…
Blends of low density polyethylene (LDPE) and poly(dimethyl siloxane) rubber (PDMS) compatibilised with ethylene methyl acrylate (EMA) have been found to be effective heat resistant cable insulants. Various electrical, mechanical, and thermal properties have been studied. From these studies, it can be concluded that t…
The electropolishing of a boron-doped diamond (BDD) film deposited by chemical vapor deposition has been studied in acetic acid- media. The electropolished surface has been characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and electrochemical measurements. The results have sh…
In order to improve the cytocompatibility of polyurethane (PU) porous scaffolds obtained by thermally-induced phase separation, poly(hydroxylethyl acrylate) (PHEA) was covalently immobilized by grafting copolymerization of HEA by photo-oxidation of the scaffolds and initiation of UV light. FT-IR-ATR spectroscopy and X…
AZ91 Mg alloy consisting of elongated grains was processed by a directional solidification method and mechanical properties of the directionally solidified Mg alloy were compared with those of the non-directionally solidified Mg alloy by tensile tests at room temperature and at 473 K. The directionally solidified Mg a…
Fracture toughness of silicon crystals has been investigated by indentation methods, and their surface energy has been calculated using molecular dynamics (MD). When a conical indenter was forced into a (001) silicon wafer at room temperature, {110} cracks were mainly introduced from the indent, indicating that fractu…
A homologous series of azomesomesogens, 2"[4-(4'-n-alkoxybenzoyloxy)-3-chloro phenylazo] naphthalene, with lateral chloro group was synthesized. All twelve homologues of the series synthesized exhibit enantiotropic nematic mesophase. The plot of transition temperatures against the number of carbon atoms in the alkoxy…
Polyurethane/organophilic montmorillonite (PU/OMT) nanocomposites based on polyether, organophilic montmorillonite, phenylmethane diisocyante, diglycol, and glycerine were synthesized and characterized by x-ray diffraction (XRD). Delaminated or intercalated structures in polyurethane/OMT nanocomposites with different…
A novel series of luminescent heterodecanuclear mixed-metal alkynyl complexes, [Ag6(mu-dppm)4[mu3-C[triple bond]CC[triple bond]C-Re(N--N)(CO)3]4](PF6)2, (N--N = tBu2bpy, Me2bpy, phen, Br2phen), have been successfully synthesized; the X-ray crystal structures of [Ag6(mu-dppm)4[mu3-C[triple bond]CC[triple bond]C-Re(Me2b…