Materials Literature
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Starting from the functionalized Josiphos derivatives (R)-1-[(S)-2-(diphenylphosphino)-1'-(dimethyl-3''-aminopropylsilyl)-ferrocenyl]ethyldicyclohexylphosphine ((R)-(S)-3), (R)-1-[(S)-2-(diphenylphosphino)-1'-(hydroxy methyl) ferrocenyl]ethyldicyclohexylphosphine ((R)-(S)-4), and (R)-1-[(S)-2-(diphenylphosphino)-1'-(3…
Abstract MnS nanocrystals have been prepared by a colloidal synthesis route through the reaction of MnCl 2 and S[Si(CH 3 ) 3 ] 2 in trioctylphosphineoxide. The nanocrystals were characterized using X‐ray diffraction and transmission electron microscopy. The magnetic properties were studied with SQUID magnetometry. X‐r…
Genes responsible for the synthesis of poly(3-hydroxybutyrate) (PHB) in Azotobacter sp. FA8 were cloned and analyzed. A PHB polymerase gene (phbC) was found downstream from genes coding for beta-ketothiolase (phbA) and acetoacetyl-coenzyme A reductase (phbB). A PHB synthase mutant was obtained by gene inactivation and…
Stability and fatigue are terms often referred to when discussing the durability of the shape memory effect. This paper considers the meaning of these terms and how they relate to the macroscopic memory response and the microstructural accommodation response of NiTi alloys. The results of previous workers are analysed…
Neodymium (III) oxide nanocrystals synthesized by the inverse microemulsion technique were dispersed in sol–gel titania/organically modified silane (ormosil) composite thin films for photonic applications. X-ray diffraction analysis and transmission electron microscopy observation show that the neodymium oxide nanopar…
This article is about the coating of thin titanium dioxide film by sputter deposition. When irradiated with solar light, thin titanium dioxide film exhibits high oxidizing power and provides sterilizing, cleaning, decomposing, and hydrophylic effects. This technique has already been used for coating building walls by…
Several foams of different cell-size, including Scott Industrial polyurethane foam with large cells (20 pores per inch, ppi, or 1.2 mm per pore, black), medium cells (65 ppi, or 0.4 mm per pore, green), and near-microcellular (100 ppi, 0.25 mm per pore, white), were processed over various time and temperature regimes…
First‐principles calculations based on density‐functional theory (DFT) in the pseudopotential (PP) method have been performed for aluminum oxynitride with the spinel‐type structure (γ‐alon). The calculations show that the face‐centered sublattice of the anions is distorted, even for the hypothetical “ideal”γ‐alon spin…
In the push for renewable energy and cleaner fuels, hydrogen is a ideal candidate — at least, when the issues of how it can be stored safely and cheaply are resolved. This article examines the current research focus of industry and research institutions alike on the utilization of carbon nanostruMures as a hydrogen st…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTBlock Copolymer Microspheres Containing Intricate Nanometer-Sized Segregation PatternsZhihua Lu, Guojun Liu, and Futian LiuView Author Information Department of Chemistry, University of Calgary, 2500 University Dr., NW, Calgary, Alberta, Canada T2N 1N4 Cite this: Macromolecules…
We use atomic-level simulation methods to determine the zero-temperature structure and properties of coherent KNbO3/KTaO3 superlattices. We find that the in-plane behavior is essentially bulk-like with an abrupt jump in the polarization at the interfaces. By contrast, the polarization in the modulation direction is co…
A silicon nitride ceramic with unidirectionally aligned β‐Si 3 N 4 elongated grains (UA‐SN) was fabricated by sintering the extruded Si 3 N 4 green body with a small amount of rodlike β‐Si 3 N 4 seed. The effect of anisotropy in microstructure on tribological properties was investigated, compared with a fine‐grained S…
In electron-beam and photolithography, local heating can change the resist sensitivity and lead to variations in significant critical dimension. Existing models suffer from the lack of experimental data for the thermal properties of the polymer resist films. We present the measurements of both out-of-plane and in-plan…
Abstract Poly( N ‐vinyl‐2‐pyrrolidone) (PVP) was chosen as a protecting polymer for its large protective value among homopolymers. Suspensions of palladium (Pd) nanoparticles were prepared by refluxing solutions of palladium(II) chloride and PVP in methanol. The mean diameter of Pd nanoparticles without adsorbed layer…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTUltrathin, Ion-Selective Polyimide Membranes Prepared from Layered PolyelectrolytesDaniel M. Sullivan and Merlin L. BrueningView Author Information Department of Chemistry Michigan State University East Lansing, Michigan 48824 Cite this: J. Am. Chem. Soc. 2001, 123, 47…
With the aim of gaining insight into the molecular and phylogenetic relationships of isocitrate dehydrogenase (IDH) from hyperthermophiles, we carried out a comparative study of putative IDHs identified in the genomes of the eubacterium Thermotoga maritima and the archaea Aeropyrum pernix and Pyrococcus furiosus. An o…
The synthesis and characterization of the new spin crossover mononuclear complex [FeII(DPEA)(bim)](ClO4)2·0.5 H2O, where DPEA = (2-aminoethyl)bis(2-pyridylmethyl)amine and bim = 2,2-bisimidazole, are reported. Variable-temperature magnetic susceptibility measurements (77−295 K) reveal the occurrence of a two-step spin…
It is found that a nanoicosahedral phase in the diameter less than 20 nm is formed as a primary crystalline phase in the melt-spun Zr70Pd30 and Zr80Pt20 binary amorphous alloys. The nanoicosahedral phase is also formed in the as-quenched state in the Zr80Pt20 binary alloy by controlling the quenching rate. The slight…
Static and earthquake‐simulator testing of two 230‐kV, 3000A, Type‐U transformer bushings manufactured in the mid 1980s by the General Electric (GE) Company was undertaken to evaluate both the seismic performance of bushings known to be vulnerable to damage from moderate earthquake shaking, and the efficacy of simple…
The crystallization of CaCO3 in the presence of monolayer-protected gold nanoparticles is investigated here. It is found that crystals of CaCO3 grow around the gold nanoparticles, which act as nucleation templates, resulting in metal–organic–inorganic hybrid materials (see Figure). Control of the shape (spherical or n…