Materials Literature
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The theory of open quantum systems is used to study the local temperature and heat currents in metallic nanowires connected to leads at different temperatures. We show that for ballistic wires the local temperature is almost uniform along the wire and Fourier's law is invalid. By gradually increasing disorder, a unifo…
A well-aligned semiconducting organic nanowire assembly is obtained by a simple, one-step soft lithographic method (see image). A patterned nanowire assembly that forms J-type intermolecular aggregation shows high birefringence, dichroism, polarized emission, and electrical conductivity (4.9 × 10−6 S cm−1).
Phosphotungstic acid (H(3)PW(12)O(40)) was used as an efficient and recyclable catalyst for the synthesis of polysubstituted quinolines through the Friedländer condensation of 2-aminoarylketone with carbonyl compounds, which was achieved by conventional heating under solvent-free conditions.
A phase-field model of nonisothermal solidification in dilute binary alloys is used to study the variation of growth velocity, dendrite tip radius, and radius selection parameter as a function of Lewis number at fixed undercooling. By the application of advanced numerical techniques, we have been able to extend the an…
The authors report on hydrophobic self-cleaning surfaces of transparent zinc oxide (ZnO) thin films tuned by controlling uniformity of the film surfaces. ZnO films were synthesized by a simple, low-cost sol–gel technique. The degree of hydrophobicity of the films was strongly dependent on the number of coatings with Z…
The reaction of half-sandwich rare earth metal bis(alkyl) complexes Cp′Ln(CH 2 SiMe 3 ) 2 (THF) (Cp′ = η 5 -C 5 Me 4 SiMe 3; Ln = Y, Lu) with 1 equiv of the binuclear tungsten octahydride complex [Cp*WH 4 ] 2 (Cp* = η 5 -C 5 Me 5 ) readily gave the corresponding Ln/W 2 heterotrimetallic hexahydride complexes Cp′Ln(THF…
The retention of deuterium (D) fuel in the Alcator C-Mod tokamak is studied using a new 'static' gas balance method. C-Mod solely employs high-Z molybdenum (Mo) and tungsten (W) for its plasma facing materials, with intermittent application of thin boron (B) films. The primarily Mo surfaces are found…
The structural, electronic, and magnetic properties of the superconducting ${\text{NdFeAsO}}_{1\ensuremath{-}x}{\text{F}}_{x}$ phases (${T}_{C}=43\text{ }\text{K}$ for $x=0.15$) have been investigated experimentally by high-resolution synchrotron x-ray powder diffraction, magnetization and $^{75}\text{A}\text{s}$ NMR…
This work reviews published structural and kinetic data on the pyridine nucleotide-linked beta-hydroxyacid oxidative decarboxylases. The family of metal ion-dependent pyridine nucleotide-linked beta-hydroxyacid oxidative decarboxylases can be divided into two structural families with the malic enzyme, which has an (S)…
Abstract Nanoporous materials hold great potential for improving the performance of biosensors due to their large available surface area and their capability for size‐selective infiltration. One of the principal challenges associated with the use of nanopores is achieving efficient infiltration of molecules whose size…
Extraordinary oxygen ordering and mobility have been found in an oxygen-nonstoichiometric mixed-valence cobalt oxide, YBaCo(4)O(8.5). The excess oxygen atoms appear to be incorporated in an orderly way into the YBaCo(4)O(7) parent lattice with different configurations as the oxygen content varies. Intense electron-bea…
The pyroelectric properties of relaxor-based ferroelectric single crystals (1 − x )Pb(Mg 1/3 Nb 2/3 )O 3 – x PbTiO 3 (PMN– x PT) with 0.13 ⩽ x ⩽ 0.40 were investigated for infrared detectors and imagers. The optimized compositions, crystallography orientations and thermal treatment temperature have been confirmed. The…
This paper describes an investigation into the performance of different charges and radii with the Poisson-Boltzmann method for the calculation of vacuum-water transfer energies. The test set consisted of 63 drug-like molecules used in a blind-test challenge. The results are consistent with earlier reports, namely, th…
We present an alternative formulation of the reaction ensemble dissipative particle dynamics (RxDPD) method [M. Lisal, J. K. Brennan, and W. R. Smith, J. Chem. Phys. 125, 16490 (2006)], a mesoscale simulation technique for studying polymer systems in reaction equilibrium. The RxDPD method combines elements of dissipat…
We report here the reactivity of epitaxial graphene islands and complete monolayers on Ru(0001) towards molecular oxygen and air. The graphene is prepared by thermal decomposition of ethylene molecules pre-adsorbed on an Ru(0001) surface in an ultra-high vacuum chamber. The graphene layer presents a periodically rippl…
Radical-substituted radical cations are attractive spin building blocks of molecule-based magnets. The introduction of an additional spin as a counteranion provides a unique three-spin system wherein the magnetic interactions between the spins of the radical substituent and the radical cation (J(intra)) and those betw…
Abstract Reactive blends of organic‐inorganic hybrid monomer, methyl‐di(phenylethynyl)silane (MDPES) and a modified bismaleimide resin (BMI/DBA) have been prepared. The thermal and oxidative stabilities of MDPES‐BMI/DBA blends were characterized by thermogravimetric analysis, derivative thermogravimetry, differential…
We report experimental studies of the stability of a ${\text{Mn}}_{12}\text{-Ac}$ crystal against magnetic avalanches as a function of the magnitude and direction of the magnetic field, as well as a function of temperature. Strong evidence for quantum effects associated with this phenomenon is seen in the $({H}_{z},{H…
Abstract In‐situ oligonucleotide synthesis through an 8‐base sequence is demonstrated within 30 nm silicon mesopores utilizing sequential phosphoramidite reactions. Stepwise attachment of each base is confirmed by monitoring the porous silicon effective refractive index via a waveguide resonance angle. A linear increa…
Hollow silica microspheres were produced by coating yeast cells with amorphous SiO 2 . In the precipitation reaction, yeast cells of Saccharomyces cerevisiae were used as a biological template. The silica shell was synthesized by the hydrolysis of tetraethylorthosilicate (TEOS) in water−alcohol mixtures as solvent usi…