Materials Literature
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Measurements of the complex dielectric permittivity in nominally pure ${\mathrm{SrTiO}}_{3}$ are reported for frequencies ${10}^{\mathrm{\ensuremath{-}}3}$ Hz\ensuremath{\le}\ensuremath{\nu}\ensuremath{\le}${10}^{8}$ Hz and temperatures 0.1 K\ensuremath{\le}T\ensuremath{\le}300 K. The experiments reveal relaxation phe…
In part I, the concept of a temperature dependent domain stability map was developed for tetragonal ferroelectrics grown on cubic substrates. In this paper, a range of experimental data on domain populations in heteroepitaxial ferroelectric films is placed in the context of the stability map. Experimental data shows t…
Each year, many single-crystal structure analyses are reported that show evidence of over- or under-refinement. Often, the refinement strategies have been naive or over-complex and alternative strategies might have been more effective. The many descriptions of crystallographic and numerical techniques suitable for ass…
Abstract We have generated microcellular polymeric foam structures using a pressure induced phase separation in concentrated mixtures of supercritical CO 2 and poly(methyl methacrylate). The process typically generates a microcellular core structure encased by a nonporous skin, the thickness of which decreases with in…
The effect of seeding on microstructure development and mechanical properties of silicon nitride was investigated by the use of morphologically regulated rodlike β‐Si 3 N 4 singlecrystal particles with a diameter of 1 μm and a length of 4 μm as seed crystals. Silicon nitride with a bimodal microstructure was fabricate…
The role of microstructural scale on deformation‐micro fracture damage induced by contact with spheres is investigated in monophase alumina ceramics over a range 3–48 μ in grain size. Measurement of a universal indentation stress–strain curve indicates a critical contact pressure ≅5 GPa, above which irreversible defor…
That dendrimer structures act as fundamental chemical building blocks (see Figure), forming a “nanoscopic chemistry set” analogous to the “picoscopic chemistry set” formed by atoms, is discussed in this review. Following the logic used by 19th century chemists while defining the atomic “chemistry set”, it is shown tha…