Materials Literature
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A biomaterial patch of electrospun collagen type fibers was designed and produced by electrospinning seven different concentrations (8%-20% w/v) of collagen solutions. The tensile strength, yield strength, and elastic modulus of the electrospun collagen fibrous patches were found to be suitable for clinical transplant…
This paper investigates the prospects of mixed bundle of carbon nanotubes (CNT) as low-power high-speed interconnects for future VLSI applications. The power dissipation and delay of CNT bundle interconnects are examined and compared with that of the Cu interconnects at the 32-nm technology node. We evaluated and comp…
Abstract A family of 36‐armed dendrimers containing six internal amino groups was synthesized and used to incorporate polyoxometalates (POMs) into their structures by ionic bonding. Allyl‐terminated dendrimer 17 (with oxidizable end groups) and methylphenyl‐terminated dendrimer 18 (with non‐oxidizable end groups) were…
A new class of nanosized metal–organic alloys (MORALs) has been synthesized for the first time. Silver nanoparticles doped with Cu(II) and Fe(III) phthalocyanines were thus synthesized in the presence of sodium dodecyl sulfate (SDS). The resulting materials were characterized by means of XRD, SEM, TEM coupled to energ…
Textured BiMnO 3 [111] thin films on SrTiO 3 (100) and Pt/TiO 2 /SiO 2 substrates were grown via r.f. magnetron sputtering (13.56 MHz). The XRD spectra confirmed a monoclinic structure and high-quality textured films for the BiMnO 3 films. The films grown on SrTiO 3 (100) showed higher crystalline quality than those d…
Abstract In general, causes for distortion phenomena during heat treatment e.g. are in general inhomogeneities or asymmetries of the distributions of mass, alloying elements, microstructure and residual stresses. Recently published papers with cylindrical shaped bearing rings clearly pointed out the influence of resid…
Narrow-band luminescence has been observed at the short-wavelength edge of the luminescence spectrum of polyethylene and polytetrafluoroethylene (Teflon), polymers in wide use today. The characteristics of this luminescence permit its assignment to the radiation emitted in recombination of ruptured C-C bonds of polyme…
Ceramics of PbZr1 − x Ti x O3 solid solutions were systematically studied in the range 0.37 ≤ x ≤ 0.57. The x-T phase diagram (T = 25°C) is constructed containing in single-phase regions isosymmetric states characterized by different concentration dependences of the structural and electrophysical parameters. There are…
Optimal conditions for condensation of equimolar ratios of stearic acid (St) and polyethylene glycol (PEG) 400, i.e. 180°C, 8hrs and H2SO4, 4g/kg (reactants mixture), were utilized to condensate the equimolar ratio of stearic (St), palmitic (Pa) or myristic (My) acid with PEG 300, 400, 600, 2000 or 6000. Each of the f…
In this paper, we evaluate the writing operation of multi-level phase change memory by using different programming techniques including proposed monotonically increasing and decreasing pulse, constant pulse, and slow quenching schemes. Our simulation results suggest that the proposed multi-level cell schemes not only…
Carbon nanotubes (CNTs) demonstrate great promise in a variety of applications such as structural polymers, super capacitors, batteries, sensors, and shielding. This is due to their unique electrical, mechanical, and thermal properties. Despite the desirable qualities commercially and in industry, little information e…
The result of the calculations of the electronic structure for Ba8Zn x Ge46 − x (x = 4, 6, 8) clathrates are presented. Band structures, total and partial electron densities of states in clathrates were obtained. The effect of the number of substituted atoms on the electron energy spectrum was considered. The lineariz…
The thin films of zinc oxide have been produced by the pulse laser deposition method at various levels of gallium and nitrogen doping. To obtain the n -type films we used gallium doping with concentration of gallium from zero up to 5 at %. The dependence of photoluminescence of the epitaxial ZnO:Ga films on the concen…
Stigmata are common features in the genusGomphonema and many species have one or several of them. But in contrast to many other genera, e.g. Cymbella, they are very simple constructions. In general they consist of a porus with a roundish external and a roundish to slit-like internal opening. More complex structures ar…
We present a method for removing spectrometer specific contributions to x-ray photoelectron spectroscopy data. We consider the degree of linearity of the detection system, the strength of the internal analyzer inelastic background, and finally determine the spectrometer's transmission function. The procedures presente…
A modified polyimide has been created that both senses and absorbs moisture. The material was prepared by introducing cobalt(II) chloride, a well-known moisture sensing and absorbing metal salt, into a polyimide. The final polymer was found to be fully cured, retaining the metal without any leeching, and was thermally…
To address the issue of miscible viscous fingering instability in buoyancy free conditions, experiments have been performed under microgravity conditions in parabolic flights. A Hele-Shaw cell, two parallel plates separated by a small gap, has been used with two miscible fluids of viscosity ratio 100 (the injected flu…
Colloidal tetrapod-shaped CdTe/CdS nanoheterostructures with near-IR photoluminescence (PL) up to 830 nm were synthesized and evolution of absorption and PL spectra during shell growth was studied.
The authentication and identification of the source of a printed document(s) can be important in forensic investigations involving a wide range of fraudulent materials, including counterfeit currency, travel and identity documents, business and personal checks, money orders, prescription labels, travelers checks, medi…
Magnetic annealing can reorient the domain moments, improving dramatically the magnetostriction of Tb–Dy–Fe oriented polycrystals without applying any prestress. In this paper, totally different stress dependences of magnetization and magnetostriction were observed in ⟨110⟩ oriented Tb0.36Dy0.64(Fe0.85Co0.15)2 polycry…