Materials Literature
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The present paper deals with mechanical adhesion energy determination of thermal oxide scales on metallic alloys. AISI 430Ti alloy (Fe–18Cr–0·4Ti–0·5Si, wt-%) was isothermally oxidised at 900°C in Ar–20%O 2 atmosphere to grow thermal oxide scales of various thickness. These oxide/metal systems were subjected to room t…
Abstract This paper examines the effect of doping on vanadium(IV) oxide (VO 2 (M)) coatings on glass, using atmospheric‐pressure, direct liquid injection metal‐organic (DLI‐MO)CVD, which potentially may find application as part of smart glazing units. It is found that tungsten‐doped VO 2 (M) deposited on commercial Si…
Recent progress in theoretical modeling of ion channeling through carbon nanotubes is reviewed. Specific aspects of the high (GeV), medium (MeV), and low (keV) ranges of ion energy are discussed and contrasted. Conclusions are drawn in an attempt to assist in preparing experiments on this unique channeling system.
We present a detailed study on the structural, magnetic, and optical properties, as well as the electronic structure of epitaxial Co-doped ZnO films prepared by magnetron sputtering. Different preparation conditions were implemented in order to control the concentration of oxygen vacancies in the ZnO host lattice. Mag…
Based on the Jiles-Atherton model and transducer's structural dynamics principle, the magnetoelastic dynamic strain model of giant magnetostrictive transducer is founded. This model takes into account the eddy current losses and the variety of stress. Simulation results are in a good agreement with the experimental on…
A preliminary investigation of shape memory (SM) effects of SMPU (shape memory polyurethane) knitting fabric is presented in this paper. Three SMPU knitted fabrics series with different content of SMPU fibers: 100% SMPU, 50% SMPU and 50% cotton, 16% SMPU and 84% cotton are designed and manufactured in our lab. Their s…
The structure of a monolayer phase of TiO x on Pt(111) has been investigated by low-energy electron diffraction (LEED), atomic resolved scanning tunneling microscopy (STM), and density functional (DF) calculations. According to LEED, the rectangular unit cell (6.8 × 8.6 Å 2 ) is incommensurate with respect to the Pt(1…
A new type of conductive filler, namely expanded graphite (EG), was used to prepare novel nanocomposites. The EG was incorporated into several rather different polymers, specifically polycarbonate (PC), low‐density polyethylene (LDPE), isotactic polypropylene (PP), and polystyrene (PS), using melt mixing in a small‐sc…
We present a theoretical and experimental study of a bilayered metamaterial structure for subwavelength imaging of magnetic field. The simplest version of such a structure consists of one or two linear arrays of capacitively loaded split pipe resonators. Its subwavelength physics is governed by strongly anisotropic ma…
Advances in first-principles computational approaches have, over the past fifteen years, made possible the investigation of physical properties of ferroelectric systems. In particular, such approaches have led to a microscopic understanding of the occurrence of ferroelectricity in perovskite oxides at ambient pressure…
Abstract The strain rate sensitivity of nanocrystalline nickel was studied at different temperatures in tensile tests and with a nanoindenter in order to examine the effect of grain size on the different deformation mechanisms of nanocrystalline materials. The experiments yielded, depending on temperature and strain r…
OBJECTIVES: Brain malignant neoplasms are still characterized by poor prognosis due to their peculiar hallmarks that severely limit aggressive multimodal therapeutic approaches. The optimization of the intratumoral drug delivery, directed to achieve effective concentrations and to reduce systemic undesired toxicity, i…
An analysis system was developed to evaluate the sliding behavior of a liquid droplet on a hydrophobic surface. This system enables continuous and simultaneous measurement of both the sliding acceleration and shape deformation during the sliding of a liquid droplet. Moreover, the velocity vector of the internal fluidi…
Nuclear quadrupole resonance (NQR) is a radio-frequency technique that can be used to detect the presence of quadrupolar nuclei, such as the$^{14}{\rm N}$nucleus prevalent in many explosives and narcotics. In a typical application, one observes trains of decaying NQR echoes, in which the decay is governed by the spin…
Positive ac dielectrophoresis (DEP) is used to rapidly align ensembles of CdSe semiconductor nanowires (NWs) near patterned microelectrodes. Due to their large geometric aspect ratio, the induced dipole of the wires is proportional to their conductivity, which can be drastically enhanced under super-band-gap illuminat…
Inclusions embedded in conventional positive refractive index materials are used to fabricate artificial materials, with negative permittivity, permeability and negative refractive index (NRI). We consider electromagnetic wave propagation in NRI materials with chiral properties that are not negligible. To this end we…
The optical properties of ethylene vinyl acetate (EVA) film have been studied. The effects of gamma irradiations on the optical spectrum of EVA films have been investigated using spectrophotometric measurements of reflectance and transmittance in the wavelength range 200–1100 nm. The absorption spectra were recorded i…
The previous thermodynamic consideration of the mechanochemical effect of dissolution and the calculation of the chemical affinity of dissolution under the conditions of strain are supplemented by the analysis of the process kinetics. A typical, for modern experiment, case of dissolution (evaporation) of a bent plate…
This paper presents proof-of-concept experiments on metallic bistable structures, and is followed by a companion paper about experiments on composite bistable structures.A bistable structure is characterized by a stress/strain curve with stable branches separated by unstable branches.The authors were interested in a p…
Abstract Thermally induced lamellar structure changes due to phase transition and degradation in organoclays based on a synthetic ‘Somasif’ mineral and two organic surfactants, di-methyl dihydro-ditallow ammonia chloride (DMDTA) and tri-butyl-hexadecyl phosphonium bromide (HTBP) were investigated by differential scann…