Materials Literature
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Thin films of Al and Mn doped ZnO (Zn0.97Mn0.02Al0.01O) were made using Pulsed Laser Deposition technique (PLD) on Si substrates maintained at a constant temperature of 400°C, under varying pressures of oxygen (O2) and at a fixed pressure of 400 μbar nitrogen (N2) atmospheres. X-ray diffraction (XRD) patterns of the d…
The bimodality of upstream electromigration (EM) failures in the dual damascene structure of 45 nm Cu interconnection process with low-k material is investigated, and the improvement is demonstrated. Two major early failure modes with voids forming in via or at the chamfer of via-trench transition area are revealed an…
Work to extend Gurney's model for fragment velocity to predict blast impulse is ongoing by means of analytical calculations, based on gas and casing dynamics, with comparisons to available experimental data. The issue of early case fracture, with release of explosive gases thus retaining a greater degree of momentum,…
Structure and magnetic features of nanostructured materials with general formula Ca1-xYxMnO3 (x = 0; 0.1; 0.2; 0.3) were investigated. Goldschmidt tolerance factor, Gt and global instability index, GII were calculated for Ca1-xYxMnO3 (x = 0, 0.25, 0.5, 0.75, 1) using the software SPuDS (Structure Prediction Diagnostic…
A photo-initiated process via femtosecond pulse induced heterogeneous nucleation in zinc ammine complex (Zn(NH3)42+) based aqueous solution without catalyst and surfactant, followed by thermal treatments for crystal growth into zinc oxide (ZnO) nanorods, was investigated. Hexagonal ZnO nanorods of diameter ≤ 100 nm wi…
Electromagnetic field induced by two external electrodes and temperature field resulting from electrodes action in 3D domain of biological tissue is considered. External electric field causes the heat generation in tissue domain. The distribution of electric potential in domain considered is described by the Laplace e…
The first principle methods have been used to investigate the electronic structure and thermal property of VO2 in rutile or monoclinic phase. The strong electronic correlation of V(3d) was described by the local density plus Hubbard U approximation, and the phonon density of states of the two phases were calculated by…
Problem statement: The aim of this research was to study the electrical and optical properties of N, N`-bis(Inaphthyl)-N,N`-diphenyl-1,1`-biphenyl-4,4`-diamine (NPB) organic materials often used as hole transport layer in Organic Light-Emitting Devices (OLED).Approach: The NPB layer was prepared using the thermal evap…
The influence of modification by pre- and post-treatment of active carbons with ammonia on adsorption abilities from liquid and gas phases has been tested. Carbon materials with different surface chemistry were obtained by chemical activation of Polish brown and subbituminous coal. The products were microporous active…
The preparation of layered double hydroxide (LDH) substituting Zn in the structure was attempted to create an environmentally.friendly photocatalyst with anion adsorption capacities. Zn-Al-substituting LDH with the Zn/Al molar ratio of 4 was synthesized by adopting the natural processes. The adsorption property of an…
This study analyzed the effects of L-profiled corner joint design on maximum load-carrying capacity of case furniture. For massive panels material (Red Pine), two test groups were formed using Polyvinyl Acetate (PVAc), Desmodur-VTKA (Polymarine) and Purocal (polyurethane-based) adhesive types. First group test samples…
In this paper, the adiabatic temperature of a transparent yttrium aluminum garnet (YAG) preparation using a NiO/Al/Y2O3 aluminothermic system was calculated based on a thermodynamic theory. The results show that the adiabatic temperature without preheating reaches the 2891 K, which is higher than the melting points of…
The evolutionary transformation of the upper valve (UV) to a probable particle filter system in some hippuritid genera belongs to the most drastic changes in pelycipod shell structures. The basic architecture of this product is well known since long times. Again discussed is the functional role of the canal system. Th…
Vibronic spectra of the Holstein model for molecular crystals are investigated using the dynamical mean field theory with the additional aid of the multi-mode Brownian oscillator model. The effects of temperature, intermolecular transfer integral, damping constant and quadratic coupling on the vibronic spectra are exa…
Sn0.897Co0.10Al0.003O2 diluted magnetic semiconductor films were grown on (100) silicon substrate by magnetron sputtering and then annealed at 300°C and 500°C for 1.5 h, respectively. Room temperature ferromagnetism was observed for the as-deposited film. The saturation magnetization (Ms) decreases as annealing temper…
A new strategy for the preparation of unsymmetrical 2,2'-bis(pyrrolyl)alkanes has been developed. It involved the condensation of pyrrole derivatives onto N-benzylhydroxylamines in the presence of HCl. This two-step procedure provided access to a wide variety of 2,2'-dipyrromethanes (3a-m). It has also been extended t…
Abstract—The nonlinear responses of a one-dimensional heterostruc-ture containing two kinds of single-negative materials with an air gap are investigated. It is shown that the frequency of zero-phase gap bistable heterostructure can be tuned simply by adjusting the width of air gap. On the other hand, the optical bist…
The paper presents the results of numerical analyses of inelastic buckling of reinforcing bars of various geometrical parameters, made of steel of various values of yield strength. The results of the calculations demonstrate that the yield strength of the steel the bars are made of influences considerably the equilibr…
Carbon nanotubes (CNT) were synthesized on nanopatterned catalysts. The catalyst nanoparticles were obtained using dip pen nanolithographytechnique. Dip pen nanolithography technique was used to deposit NiCl(2) nanopatterns with sub-200 nm feature sizes on a silicon substrate. The deposited features were verified by u…
Dynamic behavior of hydrogen desorption from pure iron with a body-centered-cubic lattice and Inconel 625 with a face-centered-cubic lattice was examined during tensile deformation using a quadrupole mass spectrometer in a vacuum chamber integrated with a tensile testing machine. Hydrogen desorption from hydrogen-char…