Materials Literature
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Development of high‐efficiency multicontaminant sorbents is critical for commercialization of power plants utilizing integrated gasification combined cycle technologies. A known prototypical sorbent for this application is the compound zinc orthotitanate, Zn 2 TiO 4 (ZTO). Previous work has not completely resolved the…
This paper reports the texturing behavior of β‐sialon by strong magnetic field alignment (SMFA) during slip casting, followed by reaction pressureless sintering, using either α or β‐Si 3 N 4 , Al 2 O 3 , and AlN as the starting materials. It is found that the β‐Si 3 N 4 crystal exhibits a substantially stronger orient…
The effect of hydrostatic pressure on the ferromagnetic ordering transition of the monoclinic Gd5(Si0.375Ge0.625)4 giant magnetocaloric effect compound was investigated using x-ray magnetic circular dichroism measurements in a diamond anvil cell. The Curie temperature TC increases linearly with applied pressure up to…
A semiquantitative correlation between experimental observations and theoretical prediction in electron microscopy is achieved. Experiments conducted on amorphous silicon in the convergent beam electron diffraction mode provide measurements of the reduction of the central-disk intensity. In addition to elastic scatter…
In this paper sorption and desorption of water vapor on hair fibers treated with various oils is investigated, using a dynamic vapor sorption (DVS) apparatus. Results show lower "equilibrium" sorption of moisture for various oil-treated samples compared to the untreated sample. Coconut oil-treated hair had a higher re…
The effects of oxygen pick‐up and sintering additives on the formation of silicon carbide (SiC) fibers from polyaluminocarbosilane are studied. It has been found that the strict control of oxygen pick up during the oxidation curing is essential to produce near‐stoichiometric SiC fibers. When the molar ratio of oxygen…
A ceramic composite mimicking the pervasively cracked microstructure of flexible sandstone (itacolumite) was successfully synthesized by sintering two ceramic materials with different thermal expansion coefficients. A combination of granular KZr 2 (PO 4 ) 3 (high thermal expansion) and powdered KAlSi 2 O 6 (low therma…
Although concrete is an extremely popular material in the building industry, it is very weak in tension, as compared to its strength in compression. Smart prestressing of concrete with shape memory alloy fibers is a promising solution to this limitation. To this end, already stretched shape memory alloy fibers are emb…
The momentum distribution in KD 2 PO 4 (DKDP) has been measured using neutron Compton scattering above and below the weakly first-order paraelectric–ferroelectric phase transition ( T =229 K). There is very little difference between the two distributions, and no sign of the coherence over two locations for the proton…
Clathrochelate iron(II) FeBd 2(S2C2(CN)2Gm)(BF)2 tris-dioximate with a ribbed vic-dinitrile fragment was synthesized as a precursor of the monoribbed-functionalized hybrid phthalocyaninoclathrochelates by nucleophilic substitution of the vic-dichloride FeBd2(Cl2Gm)(BF)2 clathrochelate (1) with the potassium salt of di…
Highly stable gold–silver alloy nanoparticles with varying mole fractions were prepared in aqueous sodium dodecyl sulfate solution by simultaneous reduction of chloroauric acid (HAuCl4) and silver nitrate (AgNO3) using sodium citrate. The formation of alloy nanoparticles was confirmed by UV-visible spectroscopy and tr…
Abstract The simple reaction of titanium isopropoxide in benzylamine is shown to lead to remarkably complex, highly ordered hybrid structures. These structures consist of anatase nanoplatelets that were stacked in a lamellar fashion with a small organic layer in between. By careful characterization of these structures…
The previously reported incommensurately modulated scheelite-like structure KNd(MoO(4))(2) has been exploited as a natural (3 + 1)-dimensional superspace model to generate the scheelite-like three-dimensional structure family. Although each member differs in its space-group symmetry, unit-cell parameters and compositi…
Diluted magnetic semiconductors (DMS) are among the most intensely investigated materials in recent times in view of their great application potential. Yet, they are also the most controversial because of the possibility of extrinsic effects attributable to dopant solubility and clustering, point defects, incorporatio…
The epitaxial films of the recently developed calcium and strontium stannates phosphors with perovskite or its related structure were fabricated by the pulsed-lased deposition method. The films were all highly transparent in the visible region, and showed intense luminescence of several colors under ultraviolet excita…
An ambient aqueous soakage technique is successfully developed to prepare PbS nanoclusters on eggshell membrane (ESM) fibers containing some active functional groups (hydroxyl, amine, imine, etc). Based on the biomaterial ESM serving as the reactive substrate and some ESM biomacromolecules acting as the surfactant, Pb…
We describe a series of experiments to learn how to produce flat LaSrMnO 3 /YSZ/NiO‐YSZ multilayer packages typically used for solid oxide fuel cells, in a single cosintering cycle, by applying a load during cosintering using sintering arches. We demonstrate that the key step is to apply the load gradually after the m…
Ionic perylenebis(dicarboximide)s 1-5 were synthesized. The aggregation and liquid-crystalline properties of these compounds in aqueous solutions were investigated. In the concentration range of approximately 5 x 10-7-5 x 10-4 M, the structures of the ammonium side chains and counterions did not have a significant eff…
The local softness of MgO, CaO, SrO, and BaO (100) surfaces has been studied using a model based on the local density of states. In all the species, the local softness (chemical reactivity) of oxygen atoms at the surface is enhanced as compared to the bulk. The results for the local and the global softness are in agre…
A nanolithographic optical patterning technique is presented. A metal pattern on a mold is transferred onto a photoresist on a substrate, then the resist with the printed metal mask is flood illuminated. The light passes through only the resist lenses that are formed in the transfer process. Focusing by these lenses r…