Materials Literature
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Self-interstitial atoms (SIAs) and SIA clusters are produced in displacement cascades during irradiation of a material with high-energy particles. The migration kinetics of such defects are a critical factor in controlling microstructure evolution and the ensuing changes in mechanical properties. In this study, extens…
Alumina templates are used to assist the deposition of highly ordered polycrystalline diamond nanocylinders (see Figure) and diamond-like carbon nanotubes. The growth of diamond is carried out by microwave plasma-assisted CVD, using acetone as the carbon source. The dimensions of the nanofibers are easily controllable…
We report the first results of ultra-fast enhanced light emission from gold– and silver–dendrimer nanocomposites. There is a fast (70 fs) fluorescence decay component associated with the metal nanocomposites. Anisotropy measurements show that this fast component is depolarized. The enhanced emission is suggestively du…
Biomolecular Bombyx mori silk-based multiblock copolymers of poly(ethylene oxide)(PEO) and GlyAlaGlyAla prepared by step-growth polymerization based on a modular chemical method have been found to self-assemble into nanostructures. Solid-state 13 C NMR, solid-state FTIR, and powder X-ray diffraction provided evidence…
Abstract The bulk isothermal crystallization kinetics of poly(trimethylene terephthalate) (PTT) was studied using a differential scanning calorimeter. Avrami's theory was used to analyze the data. Based on crystallinity growth rate, Avrami rate constant, K, and crystallization half‐time, PTT's crystallization rate is…
Some historical aspects of the discovery of the “axio-polar” (time-odd polar) vector, its appearance as an anapole moment in atomic nuclei and in the form of a spontaneous toroidal moment in “ferrotoroidic” crystals and domains are discussed. The related linear and bilinear “electrotoroidic” and “magnetotoroidic” effe…
Rings and hexagonal arrays of nanocrystals (see Figure), where the structures correspond to the micrometer wavelength range, are shown to be produced by controlling the deposition conditions. Silver nanocrystals deposited from hexane in air form ring structures and the same nanocrystals in other solvents or in hexane…
Semiconductivity in La‐doped BaTiO 3 ceramics after high‐temperature firing, e.g., 1350°C in air, is attributed to oxygen nonstoichiometry. In more heavily doped compositions, the observed resistivity rise is attributed to surface oxidation of the grains during cooling.
Abstract This study focuses on the conformational characterization of differently processed Bombyx mori silk fibroin samples by Raman spectroscopy. The Raman spectra of silk fibroin film and liquid silk are discussed in comparison with those of the crystalline fractions of Bombyx mori silk fibroin (Cp, chymotryptic pr…
We survey recent studies and present new data on the growth, interactions, structure and chemistry of gold deposited on TiO 2 (110) surfaces. The noble metal Au on TiO 2 (110) is a model system for weak interaction of a metal with an oxide substrate; it is also of interest because Au on TiO 2 has unusually high activi…
The temperature dependence of the thermodynamic and dynamical properties of liquid water using the polarizable fluctuating charge (FQ) model is presented. The properties of ice Ih, both for a perfect lattice with no thermal disorder and at a temperature of 273 K, are also presented. In contrast to nonpolarizable model…
Fillers appear during the early grammaticalization process, roughly between the one- or two-word phase and the earliest grammar, in a variety of languages. Peters accurately points out there have been theoretical and methodological difficulties when trying to integrate the filler phenomenon in language acquisition the…
The melt rheology of a low Tg tin phosphate glass [Pglass] has been studied with oscillatory shear flow experiments to accelerate efforts to melt process the glass with different organic polymers. The w dependence of the complex viscosity η* of the Pglass is easily predicted by a modified Rouse model with two relaxati…
The different methods that can be used for measuring the effect of a hydrostatic pressure on the viscosity of polymer melts are evaluated. A linear low-density polyethylene is chosen as test material, as it can be expected to have a small pressure dependency. Special attention is given to methods employing capillary r…
Laboratory-scale experiments were carried out to explore the influence of the composition of the fat phase on mechanical and rheological properties of processed model cheeses. Cheeses made from caseinates, emulsifying salts and a milk fat fraction liquid at 24°C, which was achieved by thermal separation, showed much l…