Materials Literature
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Highly faceted wurtzite-type ZnS nanotubes with hexagonal cross-sections have been self-assembled via a thermochemistry process. The self-assembled growth along the c-axis is associated with the non-central and polar surfaces of the ZnS structure (see Figure and inside cover). Photoluminescence at room temperature sho…
Grazing incidence anomalous x-ray scattering was used to monitor in situ the molecular beam epitaxy growth of GaN/AlN quantum dots (QDs). The strain state was studied by means of grazing incidence Multi-wavelength Anomalous Di raction (MAD) in both the QDs and the AlN during the progressive coverage of QDs by AlN mono…
Abstract Unsaturated polyester and epoxy resin matrices were filled with silane‐treated cellulose fibers and the ensuing composites were tested in terms of mechanical properties before and after accelerated aging consisting of their immersion into water. The coupling agents used were γ‐aminopropyltriethoxysilane (APS)…
Multimillion-atom molecular dynamics simulation of indentation of nanocrystalline silicon carbide reveals unusual deformation mechanisms in brittle nanophase materials, resulting from the coexistence of brittle grains and soft amorphous grain boundary phases. Simulations predict a crossover from intergranular continuo…
Percolation is a statistical concept that describes the formation of an infinite cluster of connected particles or pathways. Lowering the percolation threshold is a critical issue to achieve light and low-cost conductive composites made of an insulating matrix loaded with conductive particles. This has interest for ap…
There have been long-standing concerns about the stability of the internal structure of nanocrystalline metals. In this letter we examine grain growth in nanocrystalline Cu under the microhardness indenter, examining the influence of temperature of indentation and sample purity. Surprisingly, it is found that grain co…
This paper deals with an experimental and numerical study of the dynamics of an underwater explosion and its associated fluid–structure interaction. Experimental studies of the complex fluid–structure interaction phenomena were carried out in a specially designed test pond. The pond is equipped with a high-speed camer…
Single-chain magnets: A rational approach to decrease magnetic dipolar interactions led to the chain compound [Dy(hfac)3{NIT(C6H4OPh)}] (see structure; NIT(R): 2-(4′-R)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide), the first rare-earth-radical-based single-chain magnet. The compound shows slow relaxation behavior, a…
A novel foam structure of carbon nanofiber–polymer composite (see Figure) with improved electrical conductivity and percolation behavior is reported. This foam structure is very promising for use as an effective electromagnetic-interference shielding material owing to its light weight, electrical conduction, and easy…
Increased contrast in magnetic resonance imaging (MRI) is accomplished using polymeric micelles loaded with superparamagnetic iron oxide (SPIO) nanoparticles encapsulated in biocompatible, biodegradable poly(ϵ-caprolactone)-b-poly(ethylene glycol) (PCL-b-PEG) copolymers (see Figure). The loaded micelles show significa…
Abstract Summary: Cellulose/ N ‐methylmorpholine‐ N ‐oxide monohydrate (NMMO) spinning solutions were modified with surface‐active additives to yield Lyocell fibers with functional properties. Based on cellulose fibers, a new class of materials with tailored adsorption characteristics are produced. Activated charcoal…
Abstract A model framework is described for crystallization of a single solid species in a well‐mixed compartment at steady state. The model framework applies to both Type I (that is, nonhigh yield) crystallization and Type II (high yield) crystallization. The framework consists of population balances incorporating nu…
The human SH3BGRL (h-SH3BGRL) gene is a member of the human SH3BGR family.1, 2 The human SH3BGR (SH3 binding glutamic acid-rich) gene was cloned and characterized in 1997 in an effort to identify new genes located to chromosome 21. After the characterization of SH3BGR, three novel human genes, h-SH3BGRL, h-SH3BGRL2, a…
In the present paper the potential application of colloidal gas aphrons (CGA) to the recovery of antioxidants from wine-making waste extracts is investigated. CGA were generated by stirring a buffered solution (400 ml) of a cationic surfactant(cetyltrimethylammonium bromide, CTAB) at 8000 rpm for 10 minutes. Trials we…
Abstract Four phthalocyanine‐based compounds with pseudo D 3 h symmetry have been synthesised and fully characterised. Palladium cross‐coupling methodologies were employed in order to synthesise 1,3,5‐tris[(phthalocyaninyl)ethenyl]benzene (Heck) and 1,3,5‐tris[(phthalocyaninyl)ethynyl]benzene (Sonogashira) derivatives…
The yhcH gene is part of the nan operon in bacteria that encodes proteins involved in sialic acid catabolism. Determination of the crystal structure of YhcH from Haemophilus influenzae was undertaken as part of a structural genomics effort in order to assist with the functional assignment of the protein. The structure…
The thermal and electrical transport properties, including electrical resistivity $(\ensuremath{\rho})$, thermopower $(S)$, and thermal conductivity $(\ensuremath{\kappa})$ of ${\mathrm{Ag}}_{42}{\mathrm{In}}_{42}{\mathrm{Yb}}_{16}$, ${\mathrm{Ag}}_{42.25}{\mathrm{In}}_{42.25}{\mathrm{Yb}}_{15.5}$, and ${\mathrm{Ag}}_…
A method of encasing cardiovascular stents with an expandable polyurethane coating has been developed to provide a smooth homogeneous inner wall allowing for a confluent growth of endothelial cells. In this design, the metal wire stent structure is completely covered by the polyurethane film, minimizing biocorrosion o…
Copper phthalocyanine thin films grown on glass and quartz substrates by the thermal evaporation method were investigated using stationary and modulated photoabsorption as well as photoreflectance spectroscopy. The stationary and modulated studies at room temperature were performed in the wavelength range 200–1200 nm…
We have characterized stability and conformational dynamics of the calcium depleted D-galactose/D-glucose-binding protein (GGBP) from Escherichia coli. The structural stability of the protein was investigated by steady state and time resolved fluorescence, and far-UV circular dichroism in the temperature range from 20…