Materials Literature
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Molecular inorganic clusters, which are stable under ambient conditions, can be used as convenient single-source precursors for controlled preparation of 2−9-nm CdSe and CdSe/ZnS nanocrystals and 2−5-nm nanocrystals of ZnSe. The use of a cluster-based single-source precursor allows nanomaterial growth to be initiated…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
Polycrystalline BaTiO 3 /Ba 0.2 Sr 0.8 TiO 3 multilayer thin films were fabricated by pulsed laser deposition onto Pt/Ti/SiO 2 /Si substrates with various stacking periodicities. The dielectric constant of the films was obviously enhanced with the decrease of the individual layer thickness, while the dielectric loss w…
A strong effect of buoyancy-driven convection on the diameter of single-walled carbon nanotubes (SWCNTs) has been demonstrated for the first time. Because of favourable convection, SWCNTs with average diameters of 0.8 nm have been produced using the electric arc technique in the vertical configuration. Up to the prese…
The synthesis of a novel epoxide inhibitor 6 of meso-DAP epimerase was achieved. A new and convenient assay for meso-DAP epimerase was devised which is a considerable improvement on previously reported assay methods. This assay was used to determine the inhibitory properties of 6. The epoxide 6 shows limited competiti…
The preparation of ceria and ceria–zirconia supported ruthenium catalysts was optimized in order to get well-dispersed metal particles. The influence of the preparation method and the treatment conditions on the final morphology of the catalyst was investigated. Ceria-supported catalysts, prepared by incipient wetness…
First-principles total-energy calculations on the tetragonal states of bulk elemental palladium have been made with a full-potential electronic structure program with both the local-density approximation (LDA) and the generalized gradient approximation (GGA). The unique path through tetragonal states produced by epita…
Missing-row reconstructions on Au(110) immersed in electrolytes have been studied by in situ reflectance anisotropy spectroscopy. Transitions between the 1 x 3, 1 x 2, and 1 x 1 surface structures were monitored as a function of the applied potential. A kinetic model allowed us to reproduce the data satisfactorily. Th…
Three biomimetic models for the binuclear Fe/Cu (heme/trisimidazole) active site of terminal oxidases, such as cytochrome c oxidase and related enzymes, have been prepared. Based upon a tetrakis(aminophenyl)porphyrin core, these models possess a single covalently linked imidazole-bearing tail on one side of the porphy…
NbS2 nanoparticles with a closed cage structure (inorganic fullerene-like phase—IF) were synthesized by reaction between NbCl5 vapor and H2S gas in a reducing atmosphere at 400 °C, and subsequent annealing under a H2S/H2 atmosphere at 550 °C. Following the synthesis, the nanoparticles were found to have a large excess…
The equilibrium structure of decoration lattices composed of colloidal particles adsorbed on periodic stripe-patterned substrates is calculated as a function of the stripe width and separation and for different interparticle interactions. Due to a competition of length scales, a wealth of different stable decoration l…
Two series of novel rod-like compounds containing Schiff-base and naphthalimide units were synthesized. The liquid crystalline and amorphous phases of these compounds have been studied by differential scanning calorimetry (DSC), polarizing microscopy and X-ray diffraction. It was found that compounds 1A, 2A and 3A wit…
Nano-ZnS was deposited into porous silicon. By varying the concentration of Zn2+ ion solution during nano-ZnS formation, the amount of nano-ZnS in porous silicon host can be controlled. The doped porous silicon exhibited a gradual shift in its photoluminescence peak from red to blue as a function of the nano-ZnS cover…
The atomic structure of a precursor-derived amorphous ceramic with the composition ${\mathrm{Si}}_{37}{\mathrm{C}}_{32}{\mathrm{N}}_{31}$ and a density of $2.4 \mathrm{g}/{\mathrm{cm}}^{3}$ was modeled using a density-functional-based molecular dynamics simulation. Three different model structures were generated, and…
In this communication we report the synthesis, structure and preliminary characterisation of Bi2LnO4Cu2Se2 (Ln = Y, Gd, Sm, Nd, La) phases; these materials are members of a new family of layered oxychalcogenides.
Abstract This paper describes the development of a comprehensive mathematical and numerical model for simulating the performance of automotive three-way catalytic converters, which are employed to reduce engine exhaust emissions. The model simulates the emission system behavior by using an exhaust system heat conserva…
The recently discovered clathrate ${\mathrm{Ba}}_{6}{\mathrm{Ge}}_{25}$ undergoes a two-step first-order phase transition at the temperatures ${T}_{S1,S2}\ensuremath{\approx}215,$ 180 K. The first-order nature of the transition is evidenced from the hysteretical temperature dependences of the electrical resistivity $\…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTStereoselectivity in the Formation of Crystalline Inclusion Complexes of Poly(3-hydroxybutyrate)s with CyclodextrinsXintao Shuai, Francis E. Porbeni, Min Wei, Todd Bullions, and Alan E. TonelliView Author Information Fiber and Polymer Science Program, College of Textiles, North…
Abstract We present experimental results on the instrumented Vickers micro-indentation and compression of solutionized Ni-rich NiTi single crystals. The tests are conducted at room temperature where the solutionized Ti-50.9 at percent Ni material is 18 degrees above Af and the solutionized Ti-51.5 at percent Ni materi…
We show that metastable rocksalt CdSe nanocrystals can persist at ambient pressure depending on the physical size of the particle. The size-dependence of the hysteresis loop was measured for the solid−solid transition in CdSe nanocrystals, between four- and six-coordinate structures. A systematic shift of the entire h…