Materials Literature
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Variational principles are derived for multi-walled carbon nanotubes (CNT) undergoing non-linear vibrations. Two sources of non-linearity are considered in the continuum modelling of CNT with the Euler–Bernoulli beam model describing the dynamics of the CNT. One source is the geometric non-linearity, which may arise a…
A new series of mesogenic unsymmetrical azines, N-(o-hydroxybenzylidene)-N′-(4-n-alkoxybenzylidene)azines, HOC6H4CH = N − N = CHC6H4OC m H2m + 1 (m = 6, 7, 8, 9, 10, 11, 12, 14 and 16) and their copper (II) complexes have been prepared. They were characterised by elemental analyses, Fourier transform infrared (FT-IR),…
In order to characterize the interface/surface properties of polycrystalline Co2MnSi Heusler alloy films, grain-size evolution with increasing annealing time has been investigated. Here, samples with nanometer-scale grains have been prepared by our specially-designed sputtering system in order to maximize the interfac…
This article describes the synthesis and some properties of a new phenol-based Schiff base oligomer and its metal complexes. First, Schiff base monomer, 2,3-bis[(2-hydroxy-naphtyl)methylene]diaminopyridine (HNMDAP) was synthesized by condensation of 2-hydroxy-1-naphtaldehyde with 2,3-diaminopyridine. Then, HNMDAP was…
The second virial coefficient, or B value, is a measurement of how well a protein interacts with itself in solution. These interactions can lead to protein crystallization or precipitation, depending on their strength, with a narrow range of B values (the 'crystallization slot') being known to promote crystallization.…
Resonant ultrasound spectroscopy has been used to characterize elastic softening and acoustic dissipation behaviour in single crystal and ceramic samples of LaAlO(3) between 10 and 300 K. For the twinned R3c single crystals, average values of the cubic elastic moduli (1/2)(C(11) - C(12)) and C(44) were followed while…
Discotic metallomesogens were prepared by complexation of phenacylpyridine ligands with copper(II) and palladium(II) ions. Picoline derivatives with an alkoxy chain were prepared by the reaction of 5-hydroxy-2-methylpyridine with alkyl bromides. In a similar manner, methyl 3,4,5-trialkoxybenzoates were obtained from m…
Conductive ceramics have widespread use in many industrial applications. One important application for such materials is electrical contact technology. Over the last few years, a new class of nanocomposite ceramic thin film materials has been developed with contact coatings as one key objective. This family of materia…
The electron–hole (e–h) exchange interaction leads to the splitting of the exciton into a pair of bright and a pair of dark states. This bright–dark—or singlet–triplet—exciton splitting was historically calculated as the sum of a long-range (LR) and a short-range (SR) component. Using a numerical atomistic approach, w…
A new experimental method was applied in in situ corrosion monitoring of mild steel Q235 under alternate wet-dry conditions. The thickness of the electrolyte film during the wet cycle was monitored by a high-precision balance with a sensibility of 0.1 mg. At the same time, an electrochemical impedance technique was em…
The compounding of rice husk and high density polyethylene (HDPE) was undertaken on a Sino PSM 30 co-rotating twin screw extruder. Four sizes of rice husk were studied at various compositions. The size ranged from 500 μm and below (coded A, B, C and D) while the content of rice husk in the composite varies from 30, 40…
A high-speed vibration milling (HSVM) method was applied to synthesize water dispersible single-walled carbon nanohorns (SWNHs). Highly reactive free radicals (HOOCCH 2 CH 2 •) produced from an acyl peroxide under HSVM conditions react with hydrophobic SWNHs to produce a highly water dispersible derivative (f-SWNHs),…
Glutamate racemase is an attractive antimicrobial drug target. Virtual screening using a transition-state conformation of the enzyme resulted in the discovery of several μM competitive inhibitors, dissimilar from current amino acid-like inhibitors, providing novel scaffolds for drug discovery. The most effective of th…
The ferritic stainless steel is a low cost alternative to the most often adopted austenitic stainless steel due to its higher strength, better ductility and superior corrosion resistance in caustic and chloride environments. However, the application of ferritic steel is limited because of poor ductility and notch impa…
A single crystal of (1−x)BiScO3−xPbTiO3 at x=0.64, which is the morphotropic phase boundary composition for this system, has been investigated utilizing two different types of diffractometry. A total of twenty different reciprocal space maps for different Bragg reflections {hkl} were collected to study their individua…
In this article, different Ni(OH)2 nanostructures have been synthesized through a facile template- and surfactant-free approach. By adding additives, changing the nickel source or choosing different solvents, nickel hydroxide can be controllably synthesized from β-Ni(OH)2 nanodisks to hierarchical β-Ni(OH)2 superstruc…
AIM: The potential of magnetic nanoparticles (MNPs) to deliver various forms of therapy has not been fully realized, in part due to difficulties in transporting the carriers through soft tissue to different target sites. The aim of this study was to demonstrate that transport of MNPs through a viscous gel can be contr…
We report inelastic x-ray scattering experiments on the lattice dynamics in SmFeAsO and superconducting ${\text{SmFeAsO}}_{0.60}{\text{F}}_{0.35}$ single crystals. Particular attention was paid to the dispersions along the [100] direction of three optical modes close to 23 meV, polarized out of the FeAs planes. Remark…
The crystallization behavior of n-C(19)H(40)/SiO(2) nanosphere composites was investigated by a combination of differential scanning calorimetry (DSC) and temperature-dependent X-ray diffraction (XRD). Three kinds of confined alkanes with different solid-solid phase transition supercoolings and a surface (or interface…
We show that polarity-dependent resistance switching in GeSbTe thin films depends strongly on Sb composition by comparing current-voltage characteristics in Sb-excess Ge2Sb2+xTe5 and stoichiometric Ge2Sb2Te5 samples. This type of switching in Ge2Sb2+xTe5 films is reversible with both continuous and pulsed dc voltages…