Materials Literature
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Abstract The Fourier transform infrared (FT‐IR) and FT‐Raman spectra of sulfur trioxide‐pyridine complex were recorded and analyzed. The potential‐dependent surface‐enhanced Raman scattering (SERS) was recorded from an electrochemically roughened silver electrode. The vibrational wave numbers of the compound were comp…
Ex situ Fourier transform infrared spectroscopy (FTIR), x-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) have been used to characterize the effects of He plasma pretreatment on O 2 plasma-induced modification of the surface composition and structure of nanoporous ultralow dielectric constant (…
A model based on transport equations was numerically implemented by the finite volume method (FVM) in a computational code in order to simulate the influence of the heat input, base metal thickness and preheating temperature on the thermal evolution and the cooling rate during the welding of the low alloy ferritic ste…
Electrical properties of the Silicon quantum dots (Si-QD) light-emitting diodes (LEDs), in its dependence on the nitrogen source used in the silicon nitride (SiN x ) matrix growth, have been studied. Si-QDs are formed in-situ during the SiN x film growth, and no post-annealing process for crystallization was applied.…
In nature, mineralization of hard tissues occurs due to the synergistic effect of components present in the organic matrix of these tissues, with templating and catalytic effects. In Suberites domuncula, a well-studied example of the class of demosponges, silica formation is mediated and templated by an axial proteina…
Cerium (III) nitrate/poly(vinylpyrrolidone) (Ce(NO 3 ) 3 /PVP) composite fibres have been prepared by electrospinning. After calcining the composite fibres in air at 500 °C, CeO 2 nanowires were obtained. The characterizations of the as-spun composite fibres and resultant nanowires have been carried out by a scanning…
Cu x Zn y S thin films were deposited on indium–tin oxide-coated glass substrates by the electrochemical deposition (ECD) method using aqueous solutions containing CuSO 4 , ZnSO 4 , and Na 2 S 2 O 3 . The film deposited under optimum conditions exhibited a high optical transmission, and its energy band gap was about 3…
SiGeAu thin films exhibit large thermoelectric power. Recently, the formation of SiGe nano crystal has been confirmed after annealing. In this study, we investigated the relationship between the size of the nano crystal and thermoelectric power. SiGe nano crystals were fabricated by the crystallization of amorphous Si…
A new target station providing Fourier transform infrared (FT-IR) spectroscopy and residual gas analysis (RGA) for in situ observation of ion-induced changes in polymers has been installed at the GSI Helmholtz Centre for Heavy Ion Research. The installations as well as first in situ measurements at room temperature ar…
Thermal grating relaxation in a metal with predominantly electronic heat transport is analyzed within the framework of the two-temperature model. Analytical solutions are obtained in the one-dimensional case, whereas the two-dimensional model simulating laser-induced transient grating experiment requires a numerical s…
PURPOSE: To explore the preparation and characterization of a novel nanosized magnetic liposome containing the PEI-As(2)O(3)/Mn(0.5)Zn(0.5)Fe(2)O(4) complex. METHODS: Mn(0.5)Zn(0.5)Fe(2)O(4) and As(2)O(3)/Mn(0.5)Zn(0.5)Fe(2)O(4) nanoparticles were prepared by chemical coprecipitation and loaded with PEI. The PEI- As(2…
The magneto-resistance, critical current density, Jc, upper critical field, Hc2, and flux pinning properties of LaFeAsO1−xFx superconductors were investigated systematically by magnetic and magneto-transport measurements in the fields up to 13 T over a temperature range of 5–35 K. It was found that the Hc2 increased w…
Point-contact (PC) Andreev-reflection (AR) measurements of the superconducting gap in iron-oxypnictide ReFeAsO 1 − x F x (Re = La, Sm) films have been carried out. The value of the gap is distributed in the range 5–10 meV (for Re = Sm) with a maximum in the distribution around 6 meV. The temperature dependence of the…
Abstract ZnS(en) 0.5 complex (en=ethylenediamine) can be synthesized by solvothermal route as thin sheet‐like crystals using en as the single solvent. We studied the influence of the main synthesis parameters (i.e. temperature, pressure, time, reactant type and concentration) on the compound crystallization kinetics t…
A new Heusler alloy, Fe2(Mn,Cr)Si, that is likely to have high spin polarization (P) and high damping constant (α) was proposed to obtain high magneto-resistance ratio and low spin torque noise in a magnetic read head with a current-perpendicular-to-plane (CPP) giant magneto-resistance (GMR) multilayer. A very high fr…
Nd–Fe–B magnets have outstanding magnetic properties, but their corrosion resistance is poor because the rare-earth-rich phases in them are easily oxidized. In this article, we report an investigation of the corrosion behaviors of sintered Nd–Fe–B magnets with varied compositions in different corrosion conditions. The…
The present work aims to study the hydrogen embrittlement process in API 5L X60 and API 5L X80 steels. The tests were performed using two kinds of hydrogen sources to work with two conditions of hydrogen damage: environmental hydrogen embrittlement and internal hydrogen embrittlement. The mechanical behavior of API 5L…
Gallium phosphide (GaP) nanoparticulate thin films were easily fabricated by colloidal suspension deposition via GaP nanoparticles dispersed in N,N-dimethylformamide. The microstructure of the film was performed by x-ray diffraction, high resolution transmission electron microscopy and field emission scanning electron…
The effect of sintering temperatures (1050-1200 °C) on the phase formation, microstructure and dielectric properties of a binary system lead-free ceramic bismuth sodium titanate–bismuth potassium titanate were investigated. 0.8Bi 0.5 Na 0.5 TiO 3 -0.2Bi 0.5 K 0.5 TiO 3 ; BNKT ceramics were successfully fabricated usin…
The quantum-mechanochemical-reaction-coordinate approach has disclosed atomically matched peculiarities that accompany the deformation-failure-rupture process occurring in nanographenes. The high stiffness of the graphene body is provided by the benzenoid unit. The anisotropy of the unit mechanical behavior in combina…