Materials Literature
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The aim of this study is to characterize thermal insulating local material, kapok, from a study in 3 dimensions in Cartesian coordinate and in dynamic frequency regime. From a study a 3 dimensional the heat transfer through a material made of wool kapok (thermal conductivity: λ = 0.035 W/m/K; density: ρ = 12.35 kg/m3;…
In this paper, we present some elements of the lattice compatibility theory ( LCT ) as plausible explanations to the problem of instability of some ternary ceramics under some circumstances. Particular attention is paid to ceramics nano‐scale patterns.
A variety of analytical techniques, such as scanning electron microscopy and 19F dynamic nuclear polarization (DNP) methods, are applied to characterize asphaltene extracted from MC-800 liquid asphalt in fluorobenzene derivatives at 1.53 mT and at room temperature. Different solvents show variable affinities for the a…
The use of metallic nanostructures for enhanced transmission and near field phenomena have been a topic of extensive research. Here we present integration of active media, consisting of InAs quantum dots (QD) embedded in quantum wells, with 2 dimensional metallic hole arrays (2DHA) leading to a strong interaction betw…
Purpose The purpose of this paper is to identify a failure mechanism of an industrial tube and recommend corrective actions to improve the reliability of the entire unit. Design/methodology/approach Metallurgical failure investigation process included mainly stereo‐, light optical microscopy and scanning electron micr…
A new finite element model is developed to predict the deformations, stresses, phase compositions and carbon concentration gradients that arise as a consequence of the physical processes involved in a carburization and quenching process of a large steel gear. Firstly, the diffusion of carbon at elevated temperatures i…
The charge-transfer (CT) complex between the donor 2-amino-4-picoline (2A4P) and the acceptor 2,5-dihydroxy-p-benzoquinone (DHBQ) was studied spectrophotometrically in different polar and non-polar solvents. The molecular composition of the complex, in all solvents, was determined by Job's method of continuous variati…
We report highly selective emitters based on high-aspect ratio 2D photonic crystals (PhCs) fabricated on large area (2 inch diameter) polycrystalline tantalum substrates, suitable for high-temperature operation. As an example we present an optimized design for a selective emitter with a cut-off wavelength of 2μm, matc…
In the present work, the non-inverted (isothermal) type equations of state (EOS) which are based on interionic potential such as Vinet–Rydberg EOS, Shanker EOS, Bardeen EOS as well as Kumar isothermal EOS are used to study the variation of relative compression volumes in range 1–0.5 and the isothermal bulk modulus wit…
We report density functional theory (DFT) calculations providing the infrared and Raman spectra of [Ru(II)(bpy)3-n (dcbpy) n ]2+ and [Rh(III)(bpy)3-n (dcbpy) n ]3+ complexes, where bpy = 2,2′-bipyridyl, dcbpy = 4,4′-dicarboxy-2,2′-bipyridyl, and n = 0, 1, 2, 3, studied in the context of dye-sensitised solar cells. We…
Purpose The purpose of this paper is to focus on the corrosion protection of magnesium alloy ZK10 by applying via the dip‐coating process an hybrid organic‐inorganic coating that contains nanocontainers of TiO2 loaded with corrosion inhibitor. Design/methodology/approach The coating consists of cross‐linked polymers c…
Visible light communication with LED is an important ICT for the ubiquitous network society. However visible light communication has the speed limit in the conventional blinking LED method. Therefore an active spectral filter would be useful in order to input information signals onto the LED spectrum. Plasmonic spectr…
Some lanthanide-doped nanoparticles can absorb X-ray radiation and emit in the visible to near infrared spectrum via a down-conversion mechanism, making them a potentially valuable agent for in vivo imaging studies. We have studied a series of Gd3+ and Eu3+compositions in lanthanide fluorides to optimize the emission…
HEMP has long been a concern for the military, but can also be a concern for civilian or commercial facilities. The shielding effectiveness of a building can be an important part of the facility's HEMP hardness, and as such may need to be determined for an HEMP assessment. Here, a simple and easy shielding effectivene…
Mycobacterium tuberculosis is capable of adapting to prolonged periods of dormancy, a state which is resistant to killing by antimycobacterial agents. The L,D-transpeptidation reaction catalysed by the L,D-transpeptidase LdtMt1 is likely to play an essential role in the adaptation of M. tuberculosis to its dormant sta…
Although atomic force microscopy (AFM) has been used extensively to characterize cell membrane structure and cellular processes such as endocytosis and exocytosis, the corrugated surface of the cell membrane hinders the visualization of extracellular entities, such as liposomes, that may interact with the cell. To ove…
There has been a considerable effort recently in the development of planar chiral metamaterials. Owing to the lack of inversion symmetry, these materials have been shown to display interesting physical properties such as negative index of refraction and giant optical activity. However, the biosensing capabilities of t…
A photo-controllable liquid crystal (LC) material was evaluated using a nematic LC mixture with azobenzene. This study aimed to determine the mechanisms that result in variations of material parameters specifically caused by the morphological change of guest molecules. The transition from rod-shaped trans isomers to b…
In the framework of the rate-independent large-strain Cosserat theory of plasticity, analytically explicit solutions of a two-dimensional shear problem are computed. Two cases are discussed where the micro-rotations are stationary solutions of an Allen–Cahn equation. Thus, for a certain parameter range, patterning ari…
Abstract Electronic and optical properties of Sr(Ti,Zr)O3 crystals in the cubic (Pm-3m) and tetragonal (I4/mcm) phase were calculated by the first-principles calculations using the density functional theory and the local density approximation. The band structure of cubic and tetragonal phases show an indirect band gap…