Materials Literature
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The interaction between solid copper and liquid gallium is considered, which is the main process during the setting of diffusion-solidifying solders. The dependences of the process rate and the size characteristics on the phase composition of the initial mixture are found. The intermetallic compound CuGa 2 is shown to…
The spectral and luminescent manifestations of the electrostatic formation of quantum dot (QD)-porphyrin complexes are studied. The QD luminescence in these complexes is found to be efficiently quenched. The luminescence of molecules complexed with QDs is also partially quenched. The luminescence excitation spectra of…
The susceptibility to stress corrosion cracking (SCC) of the weld zone of carbon steel overpack, a candidate container for geological disposal of high-level radioactive waste, was studied using the slow strain rate testing (SSRT) technique. Several welding processes were applied to low-carbon steel, and SCC susceptibi…
Abstract Carbonaceous materials are highly important electrode materials due to their wide electrochemical window, inertness with a wide spectrum of electroactive materials, and the possibility to develop highly porous but yet conductive activated carbons. Carbon cloth electrodes could be prepared from simple polymeri…
Abstract Commercial fibers covered with poly(dimethylsiloxane) were used to pre-concentrate (solid phase microextraction technique) products evolved from the thermal degradation of isotactic polypropylene. Although the analysis by GC-MS indicated the formation of more than one hundred evolved products (ca. forty were…
We demonstrated a Cu/CNT composite material for interconnect application. The electromigration (EM) properties of Cu/CNT composite via and line were investigated using Kelvin and Blech test structures respectively. Our results showed that the EM lifetime of the Cu/CNT composite is more than 5 times longer than Cu.
A model is discussed for magnetoelectric interactions under ferromagnetic resonance (FMR) in bilayers of a ferrite and a functionally graded piezoelectric. A linear variation in the in-plane piezoelectric coefficient is assumed. A dc electric field E applied perpendicular to the sample plane will then result in a vary…
A high birefringence (Δn = 0.292 at λ = 633 nm, 25°C) and low crossover frequency (<1 kHz at T = 25°C) dual‐frequency liquid crystal (DFLC) mixture was developed. The high birefringence enabled us to use a thin liquid crystal cell, which is helpful for fast response time and low operating voltage. The initially low cr…
Our previous studies on high energy (60 keV) electron bombardment of thin films of pGEM-3Zf(-) plasmid DNA with and without bound gold nanoparticles (GNP) showed that the presence of these particles greatly increases the formation of single-(SSB) and double-strand (DSB) breaks. To study the basic mechanisms underlying…
Abstract The present research aimed to characterize the microstructure of icosahedral quasicrystalline phase ( i -phase) in different chemical compositions of Al–Cu–Fe alloys. The ternary alloys with the nominal compositions of Al 70 Cu 20 Fe 10 , Al 65 Cu 20 Fe 15 and Al 63 Cu 25 Fe 12 (at%) were rapidly solidified b…
This study describes the optical and ac electrical characterization of polymethyl methacrylate (PMMA)/indium tin oxide (ITO) nanocomposites containing a Voronoi-type segregated network microstructure. Optical transmission microscopy, scanning electron microscopy (SEM), and impedance spectroscopy were used to investiga…
Ag has long been of interest for use as a low-resistivity electrode material, but the problem of agglomeration caused by annealing must be resolved. One of the solutions is alloying Ag, but this often causes an increase in electrical resistivity. In this study, thermal stability of Ag thin films modified with thin Al…
Vertically aligned 850-nm-long carbon nanofibers (CNFs) are grown on a titanium nitride (TiN) layer by a radio-frequency plasma system at 560 °C. Electrical properties of individual CNFs are statistically determined by a current sensing atomic force microscopy mode. An interpretation based on electrical contact resist…
We study boron-doped carbon nanotubes by first-principles methods based on the density functional theory. To discuss the possibility of superconductivity, we calculate the electronic band structure and the density of states (DOS) of boron-doped (10,0) nanotubes by changing the boron density. It is found that the Fermi…
Flexural rigidity of a fabric is among the important properties, especially for industrial applications of high performance fabrics. The relationships between various fabric properties and fabric stiffness were analyzed. Several monofilament fabrics were tested in the warp direction for this purpose. It was found that…
A silver-mirror reaction was used to prepare active substrates for surface-enhanced Raman scattering (SERS). Glass plates were surface treated with a thin layer of silver nanoparticles (Ag-NPs). The factors influencing the performance of the SERS substrates were systematically studied. Factors included concentrations,…
A new creditable and effective multi-axial circular tensile tester (MACTT) with 16 load sensors installed around a circumference has been developed. The new tester could be used to measure tensile properties in various directions with one sample simultaneously under the same initial conditions. As a result, not only a…
OBJECTIVE: The pharmacological treatment of cerebral vasospasm (CVS) now includes the experimental use of controlled-release biocompatible compounds that deliver a desired drug locally into the subarachnoid space. A controlled-release system consists of an active material that is incorporated into a carrier, usually i…
As opposed to conventional sub-zero treatment to transform retained austenite, deep cryogenic treatment at liquid nitrogen temperatures has been claimed to enhance the wear resistance of tool steels by additional hitherto ill defined phenomena. In summarising current knowledge at the time of writing (1996), this revie…
The magnetostrictive behaviors of Fe–Ga, Fe–Mo, Fe–W, and other Fe alloys have been observed to be sensitive to their thermal history. In this work, the changes in the structure with thermal history and how they correlate with the observed magnetostriction values in Fe–Ga, Fe–W, and Fe–Mo single crystals are examined.…