Materials Literature
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Single-crystal β-SiC nanowires coated with amorphous SiO2 were synthesized by a simple thermal evaporation technique. The photocatalytic activity of the SiC nanowires was characterized by measuring the photodegradation rate of acetaldehyde catalyzed by SiC as a function of UV irradiation time. It exhibited excellent p…
Boundary conditions are derived that determine the penetration of spin current through an interface of two non-collinear ferromagnets with an arbitrary angle between their magnetization vectors. We start from the well-known transformation properties of an electron spin wave functions under the rotation of a quantizati…
A method for the observation of the Knight shift in nanometer-scale region in semiconductors is developed using resistively detected nuclear magnetic resonance (RDNMR) technique in quantum Hall edge channels. Using a gate-induced decoupling of the hyperfine interaction between electron and nuclear spins, we obtain the…
We calculate the magnetization hysteresis for an ordered array of composite magnetic nanoparticles with a ferromagnetic (FM) core and an antiferromagnetic (AFM) shell, located on a triangular lattice and coupled via magnetostatic forces. Each nanoparticle is described by a pair of exchange-coupled (J), anisotropic spi…
The dynamics of planar crack fronts in heterogeneous media is studied using a recently proposed stochastic equation of motion that takes into account nonlinear effects. The analysis is carried for a moving front in the quasi-static regime using the Self Consistent Expansion. A continuous dynamical phase transition bet…
Growth and roughness of the interface of deposited polymer chains driven by a field onto an impenetrable adsorbing surface are studied by computer simulations in (2+1) dimensions. The evolution of the interface width W shows a crossover from short-time growth described by the exponent beta1 to a long-time growth with…
We study the structural, dynamical and electronic properties of amorphous Si\sub{1-x}Ge\sub{x}:H alloys using first principles local basis molecular dynamics simulation. The network topology and defects in the amorphous network have been analyzed. Structural changes and an increase in number of defects have been found…
The thermodynamics properties of the wurtzite and zinc-blende \InGaN alloys are calculated using first-principles density-functional calculations. Special quasi-random structures are used to describe the disordered alloys, for $x= 1/4, 1/2$, and 3/4. The effect of lattice vibrations on the phase diagram, commonly omit…
The submitted Comment is based on using an isolated quantum dot approach to discuss the situation where the coupling to the leads is considerable (not negligible). This finite lead coupling is the situation in most molecular transport junctions. In such situations the population on the molecule is not static and dynam…
The Ga vacancy mediated microstructure evolution of (Ga,Mn)As during growth and postgrowth annealing is studied using a multiscale approach. The migration barriers for the Ga vacancies and substitutional Mn together with their interactions are calculated using first principles, and temporal evolution at temperatures 2…
Abstract Poly(methyl methacrylate) (PMMA)‐functionalized multiwalled carbon nanotubes are prepared by in situ polymerization. Infrared absorbance studies reveal covalent bonding between polymer strands and the nanotubes. These treated nanotubes are blended with pure PMMA in solution before drop‐casting to form composi…
Abstract We demonstrate nanoscale architectures in real biominerals and their biomimetics. Mimicking biomineralization, that is, crystal design in association with organic molecules, has been demonstrated in recent years. Although the macroscopic morphologies in real biominerals and biomimetics have been extensively s…
In this paper I will describe some results that have been recently obtained in the study of random Euclidean matrices, i.e. matrices that are functions of random points in Euclidean space. In the case of translation invariant matrices one generically finds a phase transition between a phonon phase and a saddle phase.…
Abstract Some metals share an elusive property with silicon (and other semiconductors): they may exhibit strong self-induced current oscillations during anodic dissolution in electrochemical experiments. While this feature, as well as related features concerning self-organization at reactive solid-liquid interfaces, i…
Nano-sized calcium carbonate (CaCO 3 ) was used to reinforce a semi-crystalline ethylene-propylene-diene monomer rubber (EPDM). For comparison, micron-sized CaCO 3 was also studied. It was found that both nano-sized CaCO 3 and micron-sized CaCO 3 improved the mechanical properties of the EPDM vulcanizates, and nano-si…
In this paper, we investigate the length dependence of linear and nonlinear optical properties of finite-length BN nanotubes. The recently predicted smallest BN(5,0) nanotube with configuration stabilization is selected as an example. The energy gap and optical gap show the obvious length dependence with the increase…
Slow strain rate tests (SSRTs) were conducted, assuming the core coolant conditions of a supercritical water-cooled reactor (SCWR). Candidate alloys were chosen from austenitic stainless steels (SS), nickel base alloys, ferritic SSs, and titanium base alloys, referring to other industrial systems such as light water r…
This paper describes the state of the art of multiscale modeling of chemical solutions encountered in separation processes. It evidences the twofold role of modeling in the understanding and the prediction of selectivity of extracting molecules and gives an outline of the situation. First, the state of the art of the…
Structural phase transitions in highly concentrated hydrogen solid solutions ZrV 2 D x (4 < x < 5) were studied in the wide temperature range 1.5–310 K. Phase transitions associated with hydrogen ordering in the lattice were found to occur in the concentration range 4.0 < x < 4.5. Contrary to the previously studied lo…
Single crystals of ferroelectric BaTi2O5 were grown by a floating zone method. Heat capacities of the crystals were precisely measured over a wide temperature range of 2–800 K. The crystals show successive heat-anomalies consisting of a λ -type anomaly and a broad hump. For the λ -type anomaly, the excess specific hea…