Materials Literature
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Abstract Single crystals of BPO 4 were grown by chemical transport reactions with PCl 5 using a gradient from 1073 K to 973 K as well as with solvothermal syntheses in the temperature range between 413 K and 523 K using water, ethanol or 2‐propanol as polar protic solvents. The atomic arrangement of BPO 4 was reinvest…
Crystallization is usually a highly selective process, and this selectivity is exploited in the pharmaceutical and other industries as a method of chemical purification. Relatively little is known about how polymorphism and solvate formation can influence the selectivity of crystallizations. We describe a piperidene p…
The chromonic mesogens shown were designed to absorb at different wavelengths and yet display chromonic liquid-crystalline properties in a common solvent. Induced orientation of the mixed liquid crystals by a mechanical shearing force followed by evaporation of solvent produced anisotropic solid films that polarize li…
The Phosphorylation Site Database [http://vigen.biochem.vt.edu/xpd/xpd.htm] provides ready access to information from the primary scientific literature concerning those proteins from prokaryotic organisms, i.e., the members of the domains Archaea and Bacteria, that have been reported to undergo covalent phosphorylatio…
In this work, an integrated thermal gas flow sensor was fabricated and evaluated using a new thermal isolation technique based on a porous silicon membrane over an air cavity in silicon. The fabrication process of a thermal gas flow sensor employing this type of micro-hotplate is described together with the theoretica…
Summary Preservation of organic matter in soils depends on the chemical structure of organic compounds and on the surface properties of the mineral matrix. We tested the effect of mineral surface reactivity on organic matter decomposition by (i) investigating changes of organic matter composition in clay subfractions…
Lithium-sputtering erosion and transport has been measured in the outer divertor of the DIII-D tokamak. The Divertor Materials Evaluation System (DiMES) mechanism places a 2.5 cm lithium spot as a plasma-facing surface in the divertor. Plasma diagnostics and atomic lithium visible spectroscopy are used to measure the…
We report an inelastic neutron scattering (INS) study under a magnetic field on the frustrated molecular spin cluster V 15 . Several field-dependent transitions are observed and provide a comprehensive understanding of the low-energy quantum spin states. The energy gap 2Δ 0 ≈ 27(3) μeV between the two lowest S = 1/2 K…
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, copyright © American Chemical Society after peer review and technical editing by publisher. To access the final edited and published work see https://doi.org/10.1021/ma035542q
The temperature dependence of the electronic and atomic structure of the colossal magnetoresistive oxides La1-xSrxMnO3 (x=0.3, 0.4) has been studied using core and valence level photoemission, x-ray absorption and emission, and extended x-ray absorption fine structure spectroscopy. A dramatic and reversible change of…
Abstract Rubber goods usually require a combination of properties that cannot be provided by one elastomer only and then two or more polymer components have to be mixed to meet specific requirements. In such cases, the additives normally employed in rubber formulations are unevenly distributed, depending on the affini…
This work intends to explain mathematically the model dependence of the activation energy, E a, derived from fitting nonisothermal kinetic data to a kinetic model. Artificial data following single reaction mechanisms, both isothermal and nonisothermal, were generated to fit exactly the following simulated kinetic mode…
A series of ${\mathrm{BaTiO}}_{3}/{\mathrm{SrTiO}}_{3}$ superlattices with stacking periodicity of 6--10 unit cells were fabricated on (001)MgO substrates using pulsed-laser-deposition technique. Polarized Raman spectra revealed ${\mathrm{BaTiO}}_{3}$-like optical vibrations and confirmed tetragonal symmetry of the su…
Raman microscopy was used to follow conformational changes in single protein crystals. Crystals of native insulin and of the 5S and 12S subunits of the enzyme transcarboxylase showed a mixture of Raman marker bands signifying alpha-helix, beta-sheet and nonordered secondary structure. However, by reducing the S-S bond…
Abstract A set of thermoplastic expandable microspheres was investigated with respect to their crosslinking density and expandable property. The crosslinking efficiencies of dipentaerythritol hexaacrylate in a set of thermoplastic expandable microspheres were measured. As expandable properties, expansion curves were m…
We present a simple nonlithographic approach to arrange luminescent CdSe and core/shell CdSe/ZnS nanocrystals into large area periodic lateral patterns. Selective deposition onto organic channel-like templates fabricated by the Langmuir−Blodgett technique is achieved by anisotropic dewetting of the nanocrystal carrier…
A boehmite-derived gamma-alumina (γ-Al 2 O 3 ) system was studied using various complementary techniques to examine surface area and pore size, the amount of hydrogen-containing species, the nature of hydrogen bonding environments, and the location of these species. Using small-angle X-ray scattering, the material exa…
The equilibrium statistics of quantities computed by means of DPD (dissipative particle dynamics) are usually very sensitive to the time step used in the simulation. In this letter we show how to eliminate this sensitivity by considering the irreversible dynamics in DPD as the limiting case of a thermostat that leaves…
A detailed mechanistic study on the Mukaiyama epoxidation of limonene with dioxygen as oxidant, bis(acetylacetonato)nickel(II) as catalyst, and an aldehyde as co-reagent is reported. All major products of the reaction have been quantitatively identified, both with isobutyraldehyde and 2-methylundecanal as co-reacting…
Oriented ZnS nanobelt arrays and ZnS multicore microcables consisting of oriented nanowire bundles with sheaths (see Figure) have been synthesized via a controlled thermal process. Both the ZnS nanowires and nanobelts are single crystals grown along the [001] axis. The special structures of the oriented assemblies of…