Materials Literature
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In selective withdrawal, fluid is withdrawn through a nozzle suspended above the flat interface separating two immiscible, density-separated fluids of viscosities nu(upper) and nu(lower) = lambda nu(upper). At low withdrawal rates, the interface gently deforms into a hump. At a transition withdrawal rate, a spout of t…
We consider electrical transport through molecules with Heisenberg-coupled spins arranged in a ring structure in the presence of an easy-axis anisotropy. The molecules are coupled to two metallic leads and a gate. In the charged state of the ring, a Zener double-exchange mechanism links transport properties to the und…
Abstract Photoactive interfaces created by mesoscopic materials realize high-efficiency light to electric conversion as achieved by dye-sensitized photoelectrodes. Combinaiton of soft carbon composite materials with the mesoscopic interfaces enables solidification of the electrochemical charge-transfer interfaces and…
We have found that the current-voltage characteristics of ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}\mathrm{Mn}{\mathrm{O}}_{3(\ensuremath{-}\ensuremath{\delta})}∕\mathrm{Nb}:\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ rectifying junctions are quantitatively well described by (thermally assisted) tunneling with an effectivel…
Hybrid organic−inorganic crystalline materials have been obtained from a simple solvent-free synthesis in highly basic conditions. The formation of an organized hybrid structure has been achieved for the first time via sol−gel without employing bridged organosilica precursors. 3-glycidoxypropyltrimethoxysilane, which…
The kinetics of gas uptake on different regions of carbon nanotube bundles is investigated by means of a kinetic Monte Carlo scheme. A lattice-gas description is used to model the adsorption of particles on a one-dimensional chain of sites under two types of dynamics: (a) external kinetics, in which the chain is on th…
Polyelectrolyte multilayers (PEMs) are thin films, which are assembled one molecular layer at a time, by alternatingly adsorbing polycations and polyanions making use of their attractive electrostatic interaction. Since the porosity of PEMs is one of the properties of major interest, in the current work the first pore…
CO oxidation: The suitability of Pt nanoparticles capped with dodecylamine or hexanethiol ligands as oxide-supported catalysts was investigated by FTIR spectroscopy (see picture for the hexanethiol data). It is shown that CO can penetrate the ligand shell and that the Pt nanoparticles possess activity for CO oxidation.
Kaolin deposits, situated approximately 20 km south of Hisarcık, have been formed by the alteration of dacite and dacitic tuffs related to the Miocene volcanism associated with extensional tectonics. The Hisarcık kaolin deposits occur in the Kızılcukur, Ulaşlar and Kurtdere areas. Kaolinite is the only clay mineral as…
We report the first direct measurement of the proton 3-D Born-Oppenheimer potential in any material. The proton potential surfaces in the hydrogen-bonded superprotonic conductor Rb(3)H(SO(4))(2) are extracted from the momentum distribution measured using Deep Inelastic Neutron Scattering (DINS). The potential has a si…
The aim of this study is to evaluate the potential use of first-generation (G1) polyamidoamine (PAMAM) dendrimers as drug carriers to enhance the permeability, hence oral absorption, of drugs that are substrates for P-glycoprotein (P-gp) efflux transporters. G1 PAMAM dendrimer-based prodrugs of the water-insoluble P-g…
The first-principles calculations were performed for various structures of $\mathrm{Ir}{\mathrm{N}}_{2}$ as candidates of the new phase which was recently synthesized under high pressure. It was found that the monoclinic structure is the most stable and shows higher bulk modulus than pyrite $\mathrm{Pt}{\mathrm{N}}_{2…
The self-assembly of diblock copolymer mixtures (A- b -B/A- b -C or A- b -B/B- b -C mixtures) subjected to cylindrical confinement (two-dimensional confinement) was investigated using a Monte Carlo method. In this study, the boundary surfaces were configured to attract blocks A but repel blocks B and C. Relative to th…
Rh/CeO2 catalysts submitted to different H2 reduction, Ar+ sputtering, and oxidation treatments have been studied by X-ray photoelectron (XPS) and 1H nuclear magnetic resonance (NMR) spectroscopies. Depending on the reduction temperature, two stages have been identified in the reduction of the catalyst: below 473 K, r…
Single crystals of the poly( l -lactide) (PLLA) block and the poly(ethylene glycol) (PEG) block in poly( l -lactide)−poly(ethylene glycol) diblock copolymer were obtained by melt crystallization. The morphology, structure, and evolution process of the single crystals were investigated using transmission electron micro…
A detailed spectroscopic study was carried out on Ti(IV)-containing catalysts obtained by grafting titanocene dichloride on silica supports with different morphological features. The surface acidity and the local coordination and accessibility of Ti(IV) active centers in Ti(IV)-grafted materials were studied by FTIR a…
The first volume of the Wiley series, Environmentally Conscious Mechanical Design focuses on the foundations of environmental design - both understanding it and implementing it. Coverage includes the important technical and analytical techniques and best practices of designing industrial, business, and consumer produc…
The development of inexpensive and practical iron catalysts for the environmentally benign epoxidation of olefins with hydrogen peroxide as terminal oxidant is described. By systematic variation of ligands, metal sources, and reaction conditions, it was discovered that FeCl3 x 6 H2O in combination with pyridine-2,6-di…
The thermal phase transition and self-assembly behaviors in water of the crystalline lamellar films prepared from unsymmetrical bolaamphiphiles, N-(2-aminoethyl)-N'-(beta-d-glucopyranosyl)-alkanediamide [1(n), n = 12, 14, 16, 17, 18, and 20], have been studied using differential scanning calorimetry, polarized light m…
ATR-FTIR spectroscopy has been used in this study to characterize the molecular mechanisms and kinetic processes that take place when a chitosonium acetate thin coating is put in contact with water solutions, Staphylococcus aureus solutions, microbial nutrient solutions, and with a high water activity TSA hydrogel med…