Materials Literature
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Three bent-core liquid-crystal compounds presenting the unusual columnar B1 to tilted polar smectic (Sm-CP or B2) phase transition are studied through small-angle x-ray diffraction on aligned samples. The well-established character of the smectic phase helps to characterize the structural changes during the transition…
A number of calamitic 2,7-diary-N-alkyl-substituted carbazoles with an enantiotropic nematic phase have been prepared. Branching of the aliphatic chain attached to the nitrogen atom in the carbazole ring leads to significantly lower liquid crystal transition temperatures. These new materials show a lower ionisation po…
In the present report, the joining of shape memory alloys to themselves or to other metals is discussed. The joining processes included are arc welding, beam welding, brazing, adhesive bonding and some other techniques like friction welding, resistance welding, explosive welding, transient liquid phase diffusion bondi…
A phase field crystal (PFC) density functional for binary mixtures is coarse grained and a formalism for calculating the simultaneous concentration, temperature, and density dependence of the surface energy anisotropy of a solid-liquid interface is developed. The methodology systematically relates bulk free energy coe…
Recently, the development of compact, light-weight and powerful actuation systems has been in the centre of investigation at many scientific institutions and research groups all over the world. These systems can be used in devices of almost every aspect of modern life and based on their inherent technology they come w…
We demonstrate the applicability of LAMOX as an electrolyte for solid oxide fuel cells (SOFC) by preparing two anode‐supported cells based on La 0.9 Dy 0.1 Mo 2 O 9 and La 0.9 Dy 0.1 Mo 1 W 1 O 9 , and operating at 625°–700°C under single chamber conditions. The two cells, supported by a composite of NiO and Gd‐doped…
Mesostructures in inversed Langmuir–Schaefer films of each of two contrasting bent-core molecules are explored via atomic force microscopy. One of the molecules forms Langmuir films that are optically isotropic and the other those that are optically anisotropic. Both show suboptical mesostructures in the 100 nm range,…
This paper addresses the relative effects of softeners having different properties and their method of application (exhaust vs pad) on the colour fastness of poly(lactic acid) fabrics dyed with a range of disperse dyes with different levels of hydrophobicity. A comparison was made with a correspondingly finished polye…
The ligand 3,3'-bis(diethylaminomethyl)-1,1'-bi-2-naphthol (binolam) contains an arrayed Brønsted acid-Brønsted base (BABB) system, which is responsible for the original shape of its lanthanide compounds. The solution structure of Pr, Nd and Yb compounds is solved by means of paramagnetic NMR spectroscopy and it is de…
ABSTRACT Mechanical properties and water holding capacity (WHC) of collagen gels were evaluated using two ingredients with different particle size and shape. The variables evaluated were ingredient concentration (3, 5, and 10%, w/w), NaCl addition (0 and 2% w/w), heat treatment temperature (25, 60, and 90C), gel forma…
Measurements of the complex permittivity, ε* = ε′ – iε″, within the frequency range 200 Hz to 10 MHz for 15 laterally fluoro-substituted terphenyls have been conducted. In most cases the substances exhibited the nematic phase over a broad temperature range. All substances were characterised by negative dielectric anis…
Elastic deformations of homeotropic nematic liquid crystal layers subjected to a DC electric field were studied numerically in order to determine their development under increasing voltage. Both signs of the dielectric anisotropy, Δϵ, and of the sum of flexo-electric coefficients, e 11 + e 33, were considered, as were…
A fascinating nanoobject, possessing a hard core of multi-walled carbon nanotubes (MWNTs) and a relatively soft shell of brushlike polystyrene (PS) was chemically synthesized by thiol lactam initiated radical polymerization. FT-IR and X-ray photoelectron spectroscopy were employed to characterize the nanocomposites an…
Computer simulation is performed to study the mechanisms for controlling domain configurations and sizes in crystallographically engineered ferroelectric crystals. It is found that minimal domain sizes and highest domain wall densities are obtained with intermediate electric field applied along nonpolar axis of ferroe…
Control of the morphology of self-organized nanostructures is the key issue in bottom-up approaches. Here, morphological transitions of precipitation patterns in C:Cu nanocomposite films are studied. The films have been grown by oblique incidence ionized physical vapor deposition. We show that the ion energy and direc…
We have developed easy-to-use homogeneous methods utilizing time-resolved fluorescence resonance energy transfer (TR-FRET) and fluorescence quenching for quantification of eukaryotic cells. The methods rely on a competitive adsorption of cells and fluorescently labeled protein onto citrate-stabilized colloidal gold na…
Nanoparticle-mediated drug delivery and controlled release has been a vigorous research area in contemporary nanomedicine. The in vivo stability of nanoparticle delivered on site is a prerequisite for the design of drug-controlled release by any means. In this study, the first methodology comprised of microdialysis an…
Photoelastic stress measurements have proven quite useful in the analysis of residual and induced stress within transparent polymer materials. We show the utility of polymer birefringence as an avenue for assessing location and type of damage, as well as the extent of repair, in healable polymers based on the thermall…
Rubrobacter xylanophilus is the only actinobacterium known to accumulate the organic solute mannosylglycerate (MG); moreover, the accumulation of MG is constitutive. The key enzyme for MG synthesis, catalysing the conversion of GDP-mannose (GDP-Man) and D-3-phosphoglycerate (3-PGA) into the phosphorylated intermediate…
The pairing symmetry of ${\text{BaFe}}_{2\ensuremath{-}x}{\text{Co}}_{x}{\text{As}}_{2}$ was investigated by Raman scattering. The gap structure appears only in the ${B}_{2\text{g}}$ symmetry inconsistent with Muschler et al. [Phys. Rev. B 80, 180510(R) (2009)]. They concluded that the gap symmetry is the extended $s$…