Materials Literature
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Evolvement of bioinspired approaches for the construction of well-ordered nanostructures is a crucial intersection of branches of materials science and biotechnology. In this paper, floriated clusters of silver nanocrystallites, which consist of polycrystalline grains about 5 nm in diameter, have been successfully pre…
There has been a long-running debate among theorists and experimentalists on the precise nature of water adsorption at the $\mathrm{Ti}{\mathrm{O}}_{2}(110)$ surface. Some experimentalists argue that dissociative adsorption occurs only at defect sites (O vacancies) and therefore at low coverages. Although there is no…
Electron-spin relaxation at different surfaces of p-doped GaAs is investigated by means of spin, time and energy resolved 2-photon photoemission. These results are contrasted with bulk results obtained by time-resolved Faraday rotation measurements as well as calculations of the Bir-Aronov-Pikus spin-flip mechanism. D…
We have designed and synthesized two photochromic compounds incorporating fused indoline and benzooxazine fragments. Variable-temperature 1H NMR spectroscopy demonstrates that their central [1,3]oxazine ring opens thermally with free energy barriers ranging from 14 to 19 kcal mol(-1). The ring-opened species reverts r…
We have investigated azimuthal spin-wave modes in magnetic vortex structures using time-resolved Kerr microscopy. Spatially resolved phase and amplitude spectra of ferromagnetic disks with diameters from 5 $μ$m down to 500 nm reveal that the lowest order azimuthal spin wave mode splits into a doublet as the disk size…
The coupling between Zeeman spin splitting and Rashba spin-orbit terms has been studied experimentally in a gated InGaAs/InP quantum well structure by means of simultaneous measurements of the weak antilocalization (WAL) effect and beating in the SdH oscillations. The strength of the Zeeman splitting was regulated by…
A comparative ab initio pseudopotential study of the adsorption and migration profiles of single neutral Pt and Au atoms on the stoichiometric and reduced $\mathrm{Ti}{\mathrm{O}}_{2}$ rutile (110) surfaces is presented. Pt and Au behave similarly with respect to (i) most favorable adsorption sites, (ii) the large inc…
We report the microwave synthesis and characterization of Au and Pd nanoparticle catalysts supported on CeO2, CuO, and ZnO nanoparticles for CO oxidation. The results indicate that supported Au/CeO2 catalysts exhibit excellent activity for low-temperature CO oxidation. The Pd/CeO2 catalyst shows a uniform dispersion o…
Strong friction anisotropy is found when the twofold surface of an atomically clean aluminum-nickel-cobalt quasicrystal slides against a thiol-passivated titanium-nitride tip. Friction along the aperiodic direction is one-eighth as much as that along the periodic direction. This anisotropy, which is about three times…
Significant heat transfer issues associated with four alternative hydrogen storage methods are identified and discussed, with particular emphasis on technologies for vehicle applications. For compressed hydrogen storage, efficient heat transfer during compression and intercooling decreases compression work. In additio…
Carrier concentration dependence of the thermoelectric figure of merit, ZT of SrTiO3 at high-temperature (1000 K) is clarified using heavily Nb-doped SrTiO3 epitaxial films, which were grown on insulating (100)-oriented LaAlO3 single-crystalline substrates by a pulsed-laser deposition method. Carrier concentration, Ha…
Originally published in 2005, this book covers the closely related techniques of electron microprobe analysis (EMPA) and scanning electron microscopy (SEM) specifically from a geological viewpoint. Topics discussed include: principles of electron-target interactions, electron beam instrumentation, X-ray spectrometry,…
Polymer dispersed liquid crystal (PDLC) films serve as the basis for a variety of high-efficiency electro-optical effects. In the most general sense, as PDLC materials consists of micron-sized domains of a liquid crystal, with the domain size determined by a continuous polymer matrix running through the film. Dependin…
A novel electromigration failure mode was detected in 0.13-μm technology, copper dual damascene interconnects. Extrusions formed between the test lead and neighboring monitor lines, resulting in short-circuit failure. However, many of these extrusions were short lived, shrinking within a period of a minute to an hour.…
An analytic theory for the de Haas--van Alphen (dHvA) oscillations in layered conductors with a periodic one-dimensional (1D) potential within the planes is developed. The periodic modulation potential yields an additional factor $I(p)$ in the Lifshitz-Kosevich harmonic series which modulates the dHvA oscillation ampl…
The authors present a parametrized hysteresis model and develop a hysteresis inverse. They then design adaptive controllers with an adaptive hysteresis inverse for plants with unknown hystereses. A novel adaptive controller structure is introduced which is capable of achieving a linear parametrization and a linear err…
Abstract Summary: Multilayer microcapsules are fabricated by layer‐by‐layer assembly of sodium poly(styrene sulfonate) (PSS) and poly(allylamine hydrochloride) (PAH) on porous CaCO 3 microparticles, followed by removal of the sacrificial template. Confocal microscopy (CLSM) reveals that the obtained capsules have poly…
MOD-RTG represents the design configuration for the next generation of Radioisotope Thermoelectric Generator (RTG), aimed at improving specific power over current General Purpose Heat Source Radioisotope Thermoelectric Generators (GPHS-RTGs). As part of the MOD-RTG development program sponsored by the Office of Specia…
Ni 2 MnGa is one of the attractive ferromagnetic shape memory alloys. It is reported that the parent phase is of Heusler type and transforms into an intermediate phase above M s . As regards the crystal structure of the intermediate phase, it was previously reported that the fcc main reflection remained and additional…
We investigated the interaction between the vacancy and $\ensuremath{\Sigma}5$ (210)[001] symmetric tilt grain boundary during the sliding by taking copper as a model material. The geometry optimization was done by simulating an annealing process at elevated temperature. For interatomic interaction we used an empirica…