Materials Literature
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We demonstrate a model for determining the adsorptive and catalytic properties of strained metal surfaces based on linear elastic theory, using first-principles calculations of CO adsorption on Au and K surfaces and CO dissociation on Ru surface. The model involves a single calculation of the adsorption-induced surfac…
The intercalation of polypyrrole (ppy) into hexagonal mesostructured carbon at 6.80–12.6 wt.‐% levels results in substantial shrinkage of the framework structure (Δ d 100 = 0.8–1.0 nm) and the pore size (from 3.7 nm initially to 2.9–2.5 nm upon ppy binding). The surface areas (718–960 m 2 g –1 ) and electrical conduct…
Suspensions of anisometric particles in the nematic phase of a liquid crystalline host solvent were prepared. We chose Claytone AF, a commercial quaternary ammonium surfactant treated montmorillonite, with an aspect ratio of up to 1:2000, and dimethyldioctadecylammonium bromide treated Laponite, with an aspect ratio o…
Comparison of two protein structures often results in not only a global alignment but also a number of distinct local alignments; the latter, referred to as alternative alignments, are however usually ignored in existing protein structure comparison analyses. Here, we used a novel method of protein structure compariso…
Tin-oxide films were grown on Pt(111) substrates by oxidation of Sn/Pt surface alloys using ${\mathrm{NO}}_{2}$ exposures or by deposition of Sn in an ${\mathrm{NO}}_{2}$ ambient gas. Structural aspects of monolayer tin-oxide films were reported previously [Phys. Rev. B 64, 245402/1 (2001)]. At elevated substrate temp…
Microdomain structures and phase transitions of binary and ternary mixtures of polystyrene−polyisoprene−polystyrene (PS−PI−PS) triblock copolymer Vector 4111 (containing 18% PS) and the corresponding homopolymers were investigated in thin films by atomic force microscopy and in bulk by small-angle X-ray scattering. Th…
Poly(phenylenevinylene) polymers, functionalized with either amine or carboxyl acid groups (see Figure), have been synthesized and assembled using layer‐by‐layer deposition. This hydrogen‐bonding‐driven self‐assembly produces conjugated polymer multilayer films with molecular‐level controlled thickness and architectur…
The adsorption of O2 on the Pt(111) surface, with particular emphasis on the influence of substrate temperature, has been studied by infrared reflection absorption spectroscopy (IRAS). In the temperature range 30-90 K the IRAS spectra reveal three different molecular adsorption states. A physisorbed state appears belo…
Thin films of asymmetric diblock copolymers have been used as scaffolds to define an ordered array of nanometer‐scale reaction vessels in which high density arrays of silicon oxide nanostructures (see Figure) are produced by exposure to silicon tetrachloride. Such site‐specific silicon oxide nanostructures could have…
Pressure solution creep is one of the possible processes of mechano‐chemical deformation that controls porosity and permeability variations in the upper crust. The three‐dimensional geometry of the porous network of halite aggregates was imaged during compaction driven by pressure solution creep using X‐ray synchrotro…
New silole compounds based on the 7-azaindolyl and 2,2‘-dipyridylamino groups, 1,1-dimethyl-2,5-bis(4- N -7-azaindolylphenyl)-3,4-diphenylsilole ( 1 ), 1,1-dimethyl-2,5-bis(4‘- N -7-azaindoylbiphenylyl)-3,4-diphenylsilole ( 2 ), 1,1-dimethyl-2,5-bis( p -2,2‘-dipyridylaminophenyl)-3,4-diphenylsilole ( 3 ), and 1,1-dime…
Using ZnO a variety of micro- and nanostructures can be fabricated. We investigate hexagonal micropillars grown by high pressure pulsed laser deposition on sapphire with spatially and spectrally resolved cathodoluminescence. We demonstrate that the impurity and defect incorporation is strongly inhomogeneous, at least…
Abstract In static wetting on an elastic substrate, force exerted by the liquid–vapour surface tension on a solid surface deforms the substrate, producing a capillary ridge along the contact line. This paper presents a finite element formulation for predicting elastic deformation, close to the static wetting line (wit…
Molecular dynamics simulations with two different embedded-atom-method (EAM) potentials are applied to calculate the density, specific heat and self-diffusion coefficient of liquid cobalt at temperatures above and below the melting temperature. Simulation shows that Pasianot's EAM model of cobalt constructed on the ba…
Retarded plasmon eigenmodes in metallic nanoshells are theoretically analyzed, and both plasmon eigenfrequencies and plasmon decay rates are calculated. Spherelike and voidlike plasmon modes are considered and their behavior with geometrical parameters is analyzed. Special attention is given to the problem of radiativ…
A one-pot oxidation from cyclohexane to adipic acid has been developed, catalyzed by Fe−porphyrin in the presence of molecular oxygen without any additives. When the reaction temperature is 140 °C, oxygen pressure is 2.5 MPa, concentration of catalyst is 1.33 × 10 - 5 mol %, and reaction time is 8 h, the yield of adip…
An electron transport is studied in the system that consists of a scanning tunneling microscopy, single-molecule magnet metal. Because of quantum tunneling of magnetization in a single-molecule magnet, linear response conductance exhibits stepwise behavior with increasing longitudinal field, and each step is maximized…
A method is described for the rapid comparison of protein binding sites using geometric matching to detect similar three-dimensional structure. The geometric matching detects common atomic features through identification of the maximum common sub-graph or clique. These features are not necessarily evident from sequenc…
A series of stimuli-responsive conjugated copolymers containing alkylated bithiophene and electroactive azulene in the polymer backbone was synthesized by oxidative polymerization. These copolymers were formed in good yields with good solubility in common organic solvents such as chloroform, toluene, and THF. They als…
A Comment on the Letter by Manuel Sickert and Francis Rondelez, Phys. Rev. Lett. 90, 126104 (2003). The authors of the Letter offer a Reply.Received 26 March 2003DOI:https://doi.org/10.1103/PhysRevLett.92.139603©2004 American Physical Society