Materials Literature
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Abstract Citric acid was polymerized onto the surface of functionalized multiwall carbon nanotubes (MWCNT‐COOH) and MWCNT‐ graft ‐poly(citric acid) (MWCNT‐ g ‐PCA) hybrid materials were obtained. Due to the grafted poly(citric acid) branches, MWCNT‐ g ‐PCA hybrid materials not only were soluble in water but also were…
The crystallographic texture and grain size have a strong influence on the magnetic properties of FeSi alloys. These microstructural parameters are determined by the thermo-mechanical processing of the material. Here, some recent results on FeSi-alloys with variable Si-content and without phase transformation are pres…
The intermetallic phase precipitation, mainly sigma () and chi () phases, was studied in a comparative manner in two stainless duplex steels: a duplex type UNS S31803 and a superduplex type UNS S32520. The -phase precipitated at ferrite/ferrite grain boundaries prior to the -phase precipitation, which occurred pre…
A mode space (MS) tight binding approach for the simulation of armchair graphene nanoribbon FETs is discussed. It makes use of slab-dependent modes and a novel criterion for mode selection, going beyond the one based on the lowest energy subbands. For ideal ribbons, we show that by splitting the modes into decoupled g…
Rh nanoparticles supported on a series of zeolite Y samples containing different monovalent (H +, Na +, Rb +, and Cs + ) and divalent (Mg 2+, Ca 2+, Sr 2+, and Ba 2+ ) cations have been used as model systems to investigate the effect of promoter elements in the reduction of NO by CO. Infrared (IR) spectroscopy with NO…
Polarized reflectivity spectra of PbMoO4 crystals have been measured using synchrotron radiation up to 20 eV. The optical constants for the crystallographic axes are derived by using a Kramers–Kronig analysis. It is found that the exciton band at 3.6 eV shows a doublet structure with distinct dichroism. X-ray photoemi…
Abstract The crosslinking reaction of a triglyceride derivative containing α,β‐unsaturated ketones with diaminodiphenylmethane via aza‐Michael addition has been extensively studied. First, a model study with monofunctional compounds showed that the conjugated addition product undergoes a series of transformations lead…
In this paper, a novel concept, which is called mixed derating, is introduced for the maintenance of distribution transformers against the copper and core losses increase due to the nonlinear loads and unbalanced supply voltage, respectively. Hence, the traditional equation which is utilized for the derating of transf…
The paper presents the results of DSC and microstructural investigations of Elektron 21 magnesium alloy in as cast condition and after solution hardening. Elektron 21 is a magnesium based casting alloy containing neodymium and gadolinium for used to at 200°C in aerospace application. The solution heat treatment was pe…
Dyeing of polyamide fibers is normally made with acid dyes, however, it is somewhat difficult to achieve uniformity and control of pH and temperature must be carefully made. The possibility to dye polyamide 6.6 in a larger gamut of colours with good properties may be achieved using other classes of dyes after plasmati…
A novel multilamellar vesicular delivery system was developed for the controlled release application. Multilamellar vesicles were prepared by thin film hydration and converted into proliposomes by freeze-drying. A model drug metoclopramide, a highly hydrophilic drug, was successfully encapsulated into proliposomes. Th…
In the present work, it is evaluated the effect of water and other contaminants of alcohol fuel on the corrosion behavior of different materials, which can constitute vehicles, storage and transportation fuels systems. For such, 5 metallic materials (zamak, low-carbon steel, stainless steel, and two Al alloys) were ch…
A novel dicyanoosmium(III) complex, trans-Ph(4)P[Os(III)(salen)(CN)(2)].CH(2)Cl(2).H(2)O (1; Ph(4)P(+) = tetraphenylphosphonium cation, salen(2-) = N,N'-ethylenebis(salicylideneaminato) dianion), has been synthesized and structurally characterized. Reactions of 1 with [Cu(Me(3)tacn)(H(2)O)(2)](ClO(4))(2) (Me(3)tacn =…
Abstract In this work, we study the fabrication, structural characterization, and electrochemical activity of titanium‐supported binary AuRu catalysts for glucose oxidation. The catalysts including Au 99 Ru 1 , Au 95 Ru 5 , Au 93 Ru 7 and Au 88 Ru 12 were prepared by a hydrothermal method using formaldehyde as a redu…
A family of new mixed-ligand titanium guanidinate compounds was synthesized as potential atomic layer deposition precursors, and the surface chemistry on silica of a promising candidate (Cp(2)Ti[(N(i)Pr)(2)CN(H)(i)Pr]) was explored. Generally, these compounds have very good thermal stability with onsets of volatility…
Ultrashort pulsed lasers are effective tools for use in a wide array of nanoscale applications, ranging from precise machining of nanomaterials, to deposition of nanocomposites, to diagnostics for observations of transport properties on atomistic time and length scales. One critical caveat of these applications is pre…
Abstract A silane‐grafting water‐crosslinking approach was developed to crosslink poly( L ‐lactide) (PLLA) by grafting vinylalkoxysilane onto PLLA using dicumyl peroxide, followed by silane hydrolysis to form siloxane linkages between PLLA chains. The degree of silane grafting onto PLLA was qualitatively characterized…
The photophysical behavior of a series of heterometallic arrays made of a central Sn(IV) porphyrin connected, respectively, to two (SnRu(2)), four (SnRu(4)), or six (SnRu(6)) ruthenium porphyrin units has been studied in dichloromethane. Two different motifs connect the ruthenium porphyrin units to central tin porphyr…
In this contribution we show that random fluorene cooligomers with photo reactive acrylate units can be prepared in a simple 1-step Yamamoto synthesis. The acrylate functionalities are preserved quantitatively under Yamamoto conditions. NMR and Maldi-ToF measurements point to an almost statistical incorporation of the…
Steel sheets for automobiles are usually formed into various parts by cold working. Therefore, plastic strain introduced by the cold working must be considered as a factor affecting the hydrogen embrittlement in addition to the applied stress and the content of diffusible hydrogen entered into steels, which are consid…