Materials Literature
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An analysis is presented of a three-layer tapered core liquid crystal optical fiber (TLCF) having the outermost clad section made of radially anisotropic liquid crystal.TE mode propagation through TLCF is demonstrated with maximum distribution of power in the liquid crystal section under the situation that the TLCF co…
We demonstrate a technique for simultaneously measuring each component of the force vectors and mobility tensor of a small collection of colloidal particles based on observing a set of particle trajectories. For a few-body system of micron-sized polymer beads in oil separated by several particle radii, we find that th…
Mg-rich primers (MRPs) provide cathodic and barrier-type protection to aluminum substrates similar to that provided by zinc-rich primers (ZRPs) for steel. The former protection is driven by the more active Mg particles compared to the Al substrate, and the latter by the insulation of the substrate from the environment…
Different bulk structures of graphite oxide were systematically investigated using density functional theory (DFT). Our model consisted of a hexagonal in-plane structure of graphene with hydroxyl and epoxide groups, and different oxidation levels and water content. The graphitic AB stacking order was stable in anhydro…
A new IR non-linear optical compound [(Ag4L4)(SiW12O40)] has been hydrothermally synthesized from the self-assembly of silicotungstic acid, 4,4′-H2bpz (L = 4,4′-H2bpz = 3,3′,5,5′-tetramethyl-substituted 4,4′-bipyrazole) and AgF. Its structure is composed of rare (AgL)∞ castellated chains that are linked by polyoxometa…
Investigation of the failure of a new 230 kV transformer-cable termination showed that a micro-crack had developed in the bushing during transportation/handling. It is suggested that commissioning tests should include partial discharge measurements.
Nowadays, the preparation of bio-based polymers remains a challenging issue. The modification of starch by hydrophobic chemical substitutions results in an innovative material. We introduced the hydrophobic part of the derivative via catalytic butadiene telomerization using exclusively water as solvent in the presence…
Novel bent-shaped compounds with the naphthalene central core possessing an outer thiophene unit in the lengthening arm were synthesized. Mesomorphic behaviour of new materials was studied using optical polarising microscopy, DSC, and electrooptic methods. The structures of mesophases were identified by X-ray diffract…
Elastomeric polyesters synthesized from non-toxic and biocompatible reactants are topical research materials for tissue-engineering applications. In such applications, the morphology, chemistry and functionality of the materials surfaces play a key role. While a number of papers have focused and reported on the fabric…
New phase hollandite VOOH with a novel 2 x 2 octahedral molecular sieve has been successfully achieved via an ionic liquid-assisted route. Guided by the theoretical structural analysis, the unique structural characteristics of the infinitely linear V(3+)-V(3+) chains indeed lead to smart electrical switch behaviour as…
Hypercrosslinked networks with 43, 100, 200, 300, 400, and 500% nominal crosslinking, respectively, were prepared by crosslinking the dichloroethane-swollen styrene copolymer with 0.5% divinylbenzene by Friedel-Crafts reaction using 0.3, 0.5, 1.0, 1.5, 2.0, and 2.5 mol of a bifunctional reagent (monochlorodimethyl eth…
Statistical comparison of dissolution profiles under a variety of conditions relating to formulation characteristics, lot-to-lot, and brand-to-brand variation attracts interest of pharmaceutical scientist. The objective of this work is to apply several profile comparison approaches to the dissolution data of five-mark…
The nanoscale peeling of the graphene sheet on the graphite surface is numerically studied by molecular mechanics simulation. For center‐lifting case, the successive partial peelings of the graphene around the lifting center appear as discrete jumps in the force curve, which induce the arched deformation of the graphe…
We report on hexagonal-phase bismuth phosphate nanorods that can be formed on bismuth substrates by anodization in fluoride-containing concentrated phosphoric acid electrolyte. Under optimized conditions, layers can be formed that consist of rods with a diameter of 50–70 nm and a length of 250 nm. These nanorods are c…
We study the field emission characteristics of large‐area films of crystalline MoO 3 microbelt grown on silicon substrate by thermal evaporation in air using a commercial infrared sintering furnace. It is found that their turn‐on field, threshold field, resistance to microdischarge and field emission current stability…
By analyzing the displacement statistics of an assembly of horizontally vibrated bi-disperse frictional grains in the vicinity of the jamming transition experimentally studied before (F. Lechenault, O. Dauchot, G. Biroli and J.-P. Bouchard, Europhys. Lett., 2008, 83, 46003), we establish that their superdiffusive moti…
Two GFP analogues o-HBDI and o-HBMO have been designed and synthesized. The former shows no fluorescence while the latter shows strong fluorescence due to the formation of an intramolecular hydrogen-bond. At low temperatures, both molecules have strong fluorescence.
In this paper, we report the results of photo-luminescence experiments on high purity silica glass. Two different types of defects located on optical pieces are investigated: indented sites and laser damage craters. Visible luminescence excited at the wavelength of 325 nm (3.81 eV) is observed using confocal microscop…
The application of gas discharge plasmas for different functionalization and coating strategies is discussed with respect to cell adhesion to polymeric and metallic surfaces. Poly(ether ether ketone) (PEEK) and titanium (Ti) were selected as typical bone cell-contacting biomaterials. The surfaces were equipped with ni…
A semi-conjugated iptycene polymer containing a special “crankshaft” backbone leading to superior solubility in a nematic LC medium was synthesized. The incorporation of this polymer in the LC leads to thermodynamic stabilization of the nematic mesophase. This effect is attributed to organizational coupling of the LC…