Materials Literature
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The development of techniques for the synthesis of nanoparticles of well-defined size, shape and composition is a challenge and an important area of research in nanotechnology. Many microorganisms have the ability to produce inorganic nanostructures and metal nanoparticles with properties similar to chemically-synthes…
Over the past several years, metamaterials have been introduced and rapidly been adopted as a means of achieving unique electromagnetic material response. In metamaterials, artificially structured—often periodically positioned—inclusions replace the atoms and molecules of conventional materials. The scale of these inc…
Surfaces containing 4 x 8 x 40 microm staggered rhombus posts were hydrophobized using two methods. One, using a dimethyldichlorosilane reaction in the vapor phase, introduces a smooth modified layer, and the other, a solution reaction using methyltrichlorosilane, imparts a second (nanoscopic) length scale of topograp…
Protein adsorption behavior is at the heart of many of today's research fields including biotechnology and materials science. With understanding of protein-surface interactions, control over the conformation and orientation of immobilized species may ultimately allow tailor-made surfaces to be generated. In this contr…
The definitions for important Rietveld error indices are defined and discussed. It is shown that while smaller error index values indicate a better fit of a model to the data, wrong models with poor quality data may exhibit smaller values error index values than some superb models with very high quality data.
We investigated the intracellular uptake of different sized and shaped colloidal gold nanoparticles. We showed that kinetics and saturation concentrations are highly dependent upon the physical dimensions of the nanoparticles (e.g., uptake half-life of 14, 50, and 74 nm nanoparticles is 2.10, 1.90, and 2.24 h, respect…
[reaction: see text] The 3,3',4'4'-tetranitrodibenzocrown ethers TNDB24C8 and TNDB30C10 form organogels with chloroalkanes at 3% w/v. Atomic force microscopy and scanning electron microscopy have been used to characterize the superstructure of the gels. Gels prepared using TNDB30C10 and CHCl(3) are more fibrous and ar…
Abstract [CpM(CO) n Cl] complexes with M = Fe ( n = 2) and Mo ( n = 3) have been immobilised in plain β‐cyclodextrin (β‐CD) and permethylated β‐CD (TRIMEB) by methods tailored according to the stabilities and solubilities of the individual components. Four adducts were obtained with a 1:1 host/guest stoichiometry. The…
Antibodies are generally thought to be a class of proteins that function without the use of cofactors. However, it is not widely appreciated that antibodies are believed to be the major carrier protein in human circulation for the important riboflavin cofactor that is involved in a host of biological phenomena. A furt…
The influence of substitutions and vacancies in a unique $4d$ itinerant ferromagnet $\mathrm{Sr}\mathrm{Ru}{\mathrm{O}}_{3}$ are studied by thermoelectric power, resistivity, and magnetic measurements. Despite large changes of the Curie temperature, ordered magnetic moment, and conductivity, the thermoelectric power (…
Eine blumenkohlartige Oberfläche (siehe Bild, Maßstab: 8 μm) und Perfluorkohlenstoffketten am Polymerrückgrat bewirken, dass der Film aus dem gezeigten fluorierten Polythiophen, der elektrochemisch auf einer Indiumzinnoxid-Oberfläche abgeschieden wurde, sowohl superwasser- als auch ölabstoßend ist. Der Einschub ist ei…
A model for the dryout heat flux during penetration of water into solidifying rock is developed by combining steady-state one-dimensional phase change theory with available semiempirical equations for (i) the dryout heat flux in a porous medium and (ii) the permeability of hot rock cooled by water. The model is in goo…
The synthesis of a polyhydroxyalkanoate with medium chain length alkyl substituents by Pseudomonas oleovoranswas investigated using protonated and deuterated forms of octanoic acid in a minimal salts medium. Cultivation with deuterated octanoic acid resulted in a reduced rate of polymer accumulation compared to that w…
Abstract Thermophysical properties of liquid and supercooled tungsten were measured using non‐contact techniques in combination with an electrostatic levitator. Over the 3125–3707 K temperature range, the density measurements can be expressed as ρ ( T ) = 16.7(± 0.33)× 10 3 − 1.08(± 0.08) (kgċ m −3 ) with T m = 3695 K…
The phonon dispersion relations for tetragonal $\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$ have been determined along the [100], [110], and [001] directions at room temperature by inelastic neutron scattering. The zone-boundary TA phonon energies for $\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$ are considerably lower than th…
Electronic structure and optical spectra of GaAs nanocrystals for a wide range of sizes are studied by using both $s{p}^{3}{s}^{*}$ and $s{p}^{3}{s}^{*}{d}^{5}$ nearest-neighbor tight-binding models. Our results show that the inclusion of $d$ orbitals into a minimal basis set is necessary for a proper description of t…
In this work, we present a novel soft chemical synthesis to aluminum nanoparticles based on the hydrogenolysis of the metastable organoaluminum (I) compound (AlCp*) 4 ( 1 ) in mesitylene at 150 °C and 3 bar H 2 . Aiming at the development of a general wet-chemical, nonaqueous route to M/E intermetallic nanophases (E =…
[reaction: see text] A new dissymmetrical tetrathiafulvalene (TTF) derivative 1 was synthesized as a versatile building block to reach TTF-based donor-acceptor assemblies incorporating C(60) in triad C(60)-TTF-C(60) 2 and/or p-benzoquinone (Q) in fused dyad Q-TTF 3 and triad Q-TTF-C(60) 4.
Cobalt-containing mesoporous materials that have been prepared using different procedures have been comparatively characterized by transmission electron microscopy/energy-dispersive X-ray spectroscopy (TEM/EDS), extended X-ray absorption fine structure spectroscopy (EXAFS), X-ray absorption near edge spectroscopy (XAN…
Abstract Simulations have been carried out on metamaterials in the microwave regime. S ‐parameters obtained from waveguide simulations of a unit cell are used to retrieve the effective permittivity and permeability with which we compute the far‐field radiation of a monopole embedded in a metamaterial substrate using a…