Materials Literature
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Silver-based multilayer coatings are well known to be transparent films with low electrical resistivity. In particular, indium and zinc composite oxide (IZO)/silver containing palladium (AgPd) multilayer coatings have good pattering properties and durability. However, the IZO/AgPd multilayer coatings do not have suffi…
With the aim of producing polyhydroxyalkanoates, a study of the influence of culture conditions (nitrogen and carbon sources and temperature) on the growth of Ralstonia eutropha in stirred flasks was carried out and the use of some low-cost sources (hydrolyzed lactose, inverted sugar and corn steep liquor) as evaluate…
The Faraday effect spectra were measured in La 0.7 Sr 0.3 MnO 3−δ films. A band attributed to d-d transitions 4 A 2 g - 4 T 2 g in Mn 4+ ions or octahedral complexes (MnO 6 ) 8− was observed in the spectral region of ∼2.7 eV. The position and value of the maximum of the Faraday rotation band and the figure of merit we…
A new thermoluminescence glow curve deconvolution (GCD) function is introduced which accurately describes second order thermoluminescence (TL) curves. The logistic asymmetric (LA) statistical probability function is used with the function variables being the maximum peak intensity (Im), the temperature of the maximum…
This paper aims to show different ways the original surface of archaeological metal artefacts can be preserved in the corrosion products. Depending on the corrosion mechanism, the original surface can be located owing to some features that can be used as clues. These feature include the remains of metallurgical struct…
Abstract We have developed new Wide‐band Retardation Films (WRF) by using molecular design technologies, and started to manufacture them. The single retardation film has reverse wavelength dispersion, which means a smaller retardation value with shorter measuring wavelengths. The characteristics and applications of WR…
The solubility of manganese in YFe 1− y Mn y O 3 reaches y = 0.4. Among these compositions, YFe 0.6 Mn 0.4 O 3 has the highest conductivity with ς= 2.16 Ω −1 ·cm −1 (1000°C, air), which is >1 order of magnitude higher than that of yttrium ferrite, YFeO 3 (ς= 0.10 Ω −1 ·cm −1 , 1000°C, air). In the range 0.2 ≤ y ≤ 0…
Organic photovoltaic cells, similar to Grätzel type, have been widely investigated in recent years. In the case of Grätzel-type cells, TiO2 colloids are usually spin-coated onto an electrode and then sintered. Later, such electrodes are immersed in dye solution to sensitize the TiO2 layer for fabrication of photovolta…
Abstract Regioregular head–to-tail π-conjugated polypyridines have been prepared for the first time by organometallic polycondensation using Ni(II) complexes as the catalyst. The proportion of the HT-content in poly(6-hexylpyridine-2,5-diyl) was higher than 95%.
The orientation density function of spunbounded nonwoven fabric is defined and theoretically derived in this paper. The density function is allowed to vary according to such variables as the feeding velocity of filaments, the moving velocity of the conveyor belt, and the oscillating velocity of the aspirator, all of w…
Fiber irregularities are inherent to textile fibers, particularly natural fibers. This series of papers examines the impact of fiber irregularity on the mechanical behavior of textile fibers. Part I examines the effect of fiber dimensional irregularities on the tensile behavior of linear elastic fibers using the finit…
PET foams of variable densities (1 g/cc to 0.2 g/cc), based on virgin and recycled material were produced by extrusion with physical or chemical blowing agents and evaluated as low density core in sandwich panels having M/F impregnated paper or flame retardant mineral reinforced PET as skin faces. Flexural and shear s…
The technique based on the time-of-flight (TOF) concept was proposed for determination of ion mobility in epoxy resins under isothermal curing conditions. This study extends our earlier investigations on this subject. Ionic conductivity dc measurements also were carried out in order to gain better understanding of the…
Microstructural evolution during sintering of alumina powder compacts prepared by cold isostatic pressing (CIP) was monitored. For CIP, rubber molds lubricated with silicone oil were used so that a very small amount of impurity was introduced to the surface of the powder compacts. During sintering at 1600°C, grain gro…
A chemical kinetics study of the functional groups −OC 2 H 5, SH -, and S 2- was carried out for the sol−gel processing of GeS 2 from hydrogen sulfide and germanium ethoxide in toluene. A mass balance of the reaction components was monitored by potentiometric titrations of SH - and S 2- with the Ag/Ag 2 S ion-selectiv…
Equal-channel angular pressing (ECAP) has been used to refine the grain size of commercially pure (CP) titanium as well as other metals and alloys. CP-Ti is usually processed at about 400 degrees C because it lacks sufficient ductility at lower temperature. The warm processing temperature limits the ability of the ECA…
Abstract With the intention of examining how adsorption on a SERS‐active surface affects the electronic resonance enhancement in surface‐enhanced resonance Raman scattering (SERRS) from Ni(II) porphine (NiP), we acquired high‐quality SERR spectra from very low concentrations of NiP (∼10 −8 M ) in aqueous Ag sol from 5…
The catalytic activity of various compounds in the first stage of the melt transesterification of diphenyl carbonate and Bisphenol A (at 165°C) has been evaluated in order to identify new catalysts which may be of interest for the melt-phase preparation of Bisphenol A polycarbonate. Alkaline-earth and alkaline metals…
Comprehensive thermogalvanomagnetic measurements have been made on polycrystalline samples of Bi88Sb12. The temperature has ranged from 100 to 300 K and a magnetic field of up to 1 T has been used. The samples have contained up to 1000 ppm of either tin or selenium. We have attempted to calculate the electronic compon…
This work consists of two sequential parts, which review the advances in uncovering the capacity of VLEED, STM and PES in revealing the nature and kinetics of oxidation bonding and its consequences for the behavior of atoms and valence electrons at a surface; and in quantifying the O–Cu(001) bonding kinetics. The firs…