Materials Literature
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A new metal-assisted chemical etching method using Na2S2O8 as an oxidant is proposed to form a porous layer on a multicrystalline silicon (mc-Si). This method does not need an external bias and enables formation of uniform porous silicon layers, more rapidly than the conventional stain etching method. A thin layer of…
Nanocomposite alloys of fct γ1-Fe(Co)Pt, fcc γ-Fe(Co)Pt, and Fe(Co)2B phases with good permanent magnet properties have been formed by melt spinning followed by annealing. An amorphous phase was formed for Fe56.25−xCoxPt18.75B25 (x=0–20) alloys by melt spinning. The thermal stability of the amorphous alloys increases…
We have examined the efficiency of various techniques for the determination of the nonlinear optical response (NLO) of dye-doped liquid crystals. The intensity ranges where each technique is optimal are defined. We propose an approach for precise and detailed NLO response measurements as a function of dye concentratio…
To evidentiate the role of the nature of sulfonate ancillary ligands on the value of the quadratic hyperpolarizability of Zn(II) complexes with stilbazole-like ligands, the second-order nonlinear optical (NLO) properties of [ZnY(2)(4,4'-trans-NC5H4CH=CHC6H4NMe2)2] complexes (Y = CF3SO3, CH3SO3, or p-CH3C6H4SO3) are in…
Abstract The effect of calcium carbonate (CaCO 3 ) on the mechanical properties (with heat treatment) and thermal properties of polypropylene and isotactic polypropylene (i‐PP)/ethylene vinyl acetate (EVA) blends was investigated. CaCO 3 , in five different concentrations (3, 6, 9, 12l, and 15 wt %), was added to i‐PP…
Regular ridge-and-valley surface structures were spontaneously formed by the homoepitaxial growth of LiF(110) and CaF2(110). The surface structure was examined by in situ reflection high-energy electron diffraction (RHEED) and ex situ atomic force microscopy (AFM). The LiF(110) homoepitaxial surfaces exhibited regular…
After an investigation of the formation conditions of the intermediate phases existing in the systems Y2O3-P2O5 and Gd2O3-P2O5 (R/P = 4/1, 3/1, 1, 1/2, 1/3 and 1/5 (R = Y or Gd)) the luminescence characteristics of the Eu3+ ion substituted for the Y3+ or Gd3+ ions have been determined. The position of the O-2 -> Eu…
To improve the physical properties of protein films, various plasticizers and cross-linking agents were used in the preparation of the films. For zein film, 3% polypropylene glycol with 3% glycerol was the best plasticizer, while 2.5% glycerol was the most suitable for soy protein isolate (SPI) film in terms of tensil…
The specific interaction between catabolite activator protein (CAP) and cyclic adenosine monophosphate (cAMP) was investigated using the fragment molecular orbital method based on density functional theory (FMO-DFT). One of the efficient tools of FMO-DFT is the analysis of effective pair interactions, which are the pa…
Diethylenetriaminepentaacetic acid (DTPA) and pyridoxamine (PM) were incorporated into the amine groups on the surface of ammonia-core poly(amidoamine) dendrimers (PAMAM, Generation 2.0-5.0) to obtain dendritic ligands. These dendritic ligands were reacted with gadolinium chloride to yield the corresponding dendritic…
The spectral imagings were performed in order to examine the lateral resolution of the EDX analysis which is attached in an ultra low acceleration voltage SEM. The spectral imagings were performed for the cross section of the Ni coating on Al, which was cut using microtome, and the cross section of GaAs/AlAs super-lat…
Abstract Over the past century or so, determining the predictive models of yarn strength has been the subject of a number of investigations, because yarn strength is a principle component of yarn quality. The aim of these models is to enable the yarn strength to be predicted from the properties of its component fibres…
An aliphatic-aromatic copolyester of poly(ethylene terephthalate), PET, and poly(ethylene adipate), PEA, PET-co-PEA, was synthesized by the high temperature melt reaction of post-consumer PET and PEA. As observed by NMR spectroscopy, the reaction yielded random copolyesters in a few minutes through ester-interchange r…
Abstract A general procedure was developed for the isolation of residual chromophores in or on cellulosic material, which were hitherto inaccessible to structure elucidation due to their extremely low content in the ppb concentration scale. It is applicable to cellulosic pulp, cellulosic fibers (viscose, Lyocell) and…
Cu films were grown on (0001) α-Al 2 O 3 single-crystals by magnetron sputtering. The growth behavior was manipulated by Ar + -ion sputter cleaning of the substrates at kinetic energies between 100 and 500 eV, changing the sputter rate from 0.75 to 1.1 nm/s, and using nominal substrate temperatures of 100 and 200°C, r…
Abstract A number of bentonitic clay deposits from the Ordu area (NE Turkey) have been investigated by optical and electron microscopy, X-ray diffraction and chemical analysis. The clays are the alteration products of Late Cretaceous trachytic and trachyandesitic pyroclastic rocks. They contain volcanogenic sanidine,…
Abstract We have previously reported that small quantities of self‐assembling molecules known as dendron rodcoils (DRCs) can be used as supramolecular additives to modify the properties of polystyrene (PS). These molecules spontaneously assemble into supramolecular nanoribbons that can be incorporated into bulk PS in…
Accurate deposition of boron and silicon carbides and nitrides permits to improve the oxidation resistance of self‐healing matrices of multilayered composites. The uniformity and the microstructure of each layer and of their interfaces induce the final properties of these composites. Their mechanical behaviour in cond…
Abstract Diarylethene is a photochromic molecule, which is potentially applicable to various optoelectronic devices. In diarylethenes the π-system of the two aryl rings is separated in the open-ring isomer, while the π-system is delocalized throughout the molecule in the closed-ring isomer. Based on this idea the exch…
The antiferromagnetic-to-ferromagnetic transition in $\mathrm{Sr}{\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{Co}}_{x}{\mathrm{O}}_{3}$ $({x}_{c}\ensuremath{\simeq}0.15)$ induced by Co doping has been studied by magnetic circular x-ray dichroism. The orbital and spin magnetic moments of the Fe and Co $3d$ states under the…