Materials Literature
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We report on the controlled chemical grafting of well-defined polymer chains onto individual montmorillonite-type clay nanoplatelets and the direct visualization of the formed hybrid material at the nanoscale level. Our approach is based on the use of a surfactant mixture that contains varying proportions of hydroxyl-…
The structural, electrical, and magnetic properties of Fe3Si/GaAs(001) hybrid structures with high crystalline and interfacial perfection are studied. The Fe3Si/GaAs(001) hybrid structures are fabricated by molecular beam epitaxy at 200 °C. The composition of the films, which can be regarded as a Heusler alloy, is tun…
We describe the properties and potential applications of an electronic material that consists of an interconnected random network of single-walled carbon nanotubes. This material possesses useful electronic properties, and it can be patterned into devices with high yield using conventional microfabrication technology.…
Abstract In this paper, we describe the synthesis and characterization of poly(9,9′‐dioctylfluorene)–poly(ethylene oxide) (PF‐PEO) block copolymers with different block ratio and molecular architectures (diblock or triblock copolymers). Tapping‐mode atomic force microscopy is used to investigate the relationship betwe…
Nanoscale fabrication methods provide a unique approach to synthesize nanoscale materials. Laser-assisted embossing was used to generate close-packed arrays of hemispherical nanowells with zeptoliter (zL) volumes. The volumes of the nanowells were controlled by changing the fluence of the laser, by applying variable p…
By depositing PVD coatings on already conventionally galvanized steel sheets novel zinc alloy coatings have been developed. One of the biggest advantages of PVD coatings lies in the broad choice of coating materials as there are no constraints due to chemical reactions between the substrate and the coating. This leads…
Abstract The synthesis, crystal structure, and magnetic properties of quaternary oxides Ba3Ln2MO9 (Ln = Y, Sm–Gd, Dy–Lu for M = Mo; Ln = Y, Sm–Lu for M = W) are reported. Their powder X-ray diffraction measurements and Rietveld analysis showed that they have a “disordered” perovskite structure, i.e., BaLn2/3M1/3O3 exc…
The coercivity of cellular Sm-Co based permanent magnets is investigated by model calculations. The grain boundaries responsible for the pinning coercivity are modeled as planar inhomogeneities with arbitrary cross-sectional geometry. The calculation yields a physically transparent integral equation for the pinning en…
Multi-layer hydrogen storage thin films with Mg and MmNi3.5(CoAlMn)1.5 (here Mm denotes La-rich mischmetal) as alternative layers were prepared by direct current magnetron sputtering. Transmission electron microscopy investigation shows that the microstructure of the MmNi3.5(CoAlMn)1.5 and Mg layers are significantly…
Abstract Models based on kinetic, thermodynamic and rheological equations have been developed to compute dispersion extent, batch temperature and relative batch viscosity at discrete intervals during a mix cycle in an internal mixer. The calculated relative bulk viscosity can be linked empirically to a measured variab…
Abstract This review covers the various polymeric materials now used to produce outsoles and midsoles for footwear. Thermoset rubbers are considered to be the best material in terms of performance, but many new materials are challenging in the marketplace, due to their ease of production and lighter weight. While the…
The migration of boundaries between single crystal and polycrystalline ZnO was investigated using single crystals with well‐defined crystallographic faces. The migration rate of the basal (0001) planes through polycrystalline ZnO depended on the crystallographic polarity of the basal plane. Grain boundary migration in…
This review focuses on the reactions of ethanol on the surfaces of platinum, palladium, rhodium and gold supported on ceria (of size 10-20 nm). The bimetallic compounds: Pt-Rh, Rh-Au, Rh-Pd, and Pt-Pd were also investigated. Initially this work was aimed at understanding the roles of the different components of automo…
Yttria−alumina (YA) glasses containing 59.8−75.6 mol % Al 2 O 3 were synthesized in the form of 1−3.5 mm diameter spheroids using containerless techniques. The glasses formed at cooling rates ranging from <70 K/s at compositions near 72 mol % Al 2 O 3 and up to 300 K/s at the ends of the composition range. Samples wit…
Effects of Ag addition on sintering of a crystallizable CaO‐B 2 O 3 ‐SiO 2 glass have been investigated at 700°–900°C in different atmospheres. With Ag content increasing in the range of 1–10 vol%, the softening point, the densification, the onset crystallization temperature, and the total amount of crystalline phase…
Improved structures of MgO carbon bonded materials due to new binder systems and due to the application of electrical currents during operation have been achieved for advanced applications in the secondary metallurgy and during near net shape metal casting.
Amorphous melt-spun ribbons of an Nd/sub 4/Fe/sub 77.5/B/sub 18.5/ alloy were consolidated into bulk materials by a spark plasma sintering method. The resultant bulk materials were amorphous when the ribbons were consolidated at 773 K. The amorphous bulk materials showed a low coercivity as expected for amorphous Nd-F…
The in-situ conformations of peptide layers formed from the adsorption of two different synthetic 15-mer peptides at the hydrophilic silicon oxide/aqueous solution interface have been determined using neutron reflectivity (NR). The first peptide is based on the native sequence of a protein-binding domain within a hete…
There has been a long interest and history in using porphyrins for applications in Photodynamic Therapy (PDT) for cancer treatment. These applications arise from their photosensitizing and phototoxic properties. PDT combines a photosensitizer and light to produce highly toxic singlet oxygen and therefore destroy any u…
The major barrier to accelerating the transition from 2D fabric lamination to integral 3D textile preforms is the high costs. Toward this end, substantial researches have been conducted. This paper reports on a conventional approach to the forming of 3D flat woven preforms in a shuttle-weaving machine. The factors in…