Materials Literature
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BACKGROUND: The advent of fibrin-binding molecular magnetic resonance (MR) contrast agents and advances in coronary MRI techniques offers the potential for direct imaging of coronary thrombosis. We tested the feasibility of this approach using a gadolinium (Gd)-based fibrin-binding contrast agent, EP-2104R (EPIX Medic…
▪ Abstract Carbon nanotubes functionalized with biological molecules (such as protein peptides and nucleic acids) show great potential for application in bioengineering and nanotechnology. Fundamental understanding, description, and regulation of such bio-nano-systems will ultimately lead to a new generation of integr…
Playing tag with terbium: New hydrophobic contacts and ligating amino acids are revealed in the 2.0-Å resolution X-ray crystal structure of a chemically evolved 17-residue lanthanide-binding peptide complexed with a Tb3+ ion (see ribbon diagram). The crystal structure agrees well with luminescence-lifetime measurement…
Systematisch sich entwickelnde Formen von Goldnanokristallen mit Größen zwischen 100 und 300 nm traten bei einem modifizierten Polyolprozess auf. Durch Zugabe eines Oberflächen regulierenden Polymers und von Fremdionen sind die Formen Tetraeder, Würfel, Oktaeder und Ikosaeder („platonische Nanokristalle“, siehe Bild)…
▪ Abstract Molecular biomimetics can be defined as mimicking function, synthesis, or structure of materials and systems at the molecular scale using biological pathways. Here, inorganic-binding polypeptides are used as molecular building blocks to control assembly and formation of functional inorganic and hybrid mater…
The influence of crystallinity and lamellar thickness on the intrinsic deformation behavior of a number of semicrystalline polymers is studied: a poly(ethylene terephthalate) and two different molecular weight grades of polyethylene and polypropylene. The crystallinity and lamellar thickness are altered by varying the…
The adsorption of cytochrome c onto different mesoporous molecular sieves (C 12 −MCM-41, C 16 −MCM-41 and SBA-15) is studied at different solution pHs. Adsorption isotherms were recorded up to final solution concentrations of ca. 250 μmol/L and were found to be of the pseudo-Langmuir type. Cytochrome c (cyt c) adsorpt…
▪ Abstract This review focuses on the preparation of capped nanoparticles of inorganic materials, classified by composition. The materials described include elemental metals and metalloids (semiconductors), chalcogenide II–VI and IV–VI semiconductors, III–V semiconductors, and oxides (both of simple- and multitransiti…
▪ Abstract The unusual structure and properties of carbon nanotubes are presented, with particular reference to single-wall nanotubes (SWNTs) and nanotube properties that differ from those of their bulk counterparts. The atomic structure; electronic structure; and vibrational, optical, mechanical, and thermal properti…
Systematic shape evolution of gold nanocrystals with sizes between 100 and 300 nm was observed in a modified polyol process. By adding a surface-regulating polymer and foreign ions, one can readily access the distinct shapes of tetrahedron, cube, octahedron, and icosahedron (dubbed platonic nanocrystals, see picture)…
Abstract Corrosion products were examined from typical pewter artifacts originating from six different submerged archaeological sites, dating to between ca. A.D. 1550 and 1733, along the eastern seaboard of North America and in the Caribbean Sea. The artifacts were viewed as 270–450‐year long experiments revealing the…
The thermodynamic and structural properties of purely repulsive hard-core Yukawa particles in the fluid state are determined through Monte Carlo simulation and modeled using perturbation theory and integral equation theory in the mean spherical approximation (MSA). Systems of particles with Yukawa screening lengths of…
Abstract The production of high‐solid‐content, low‐viscosity latexes is an active field in both industry and academia. The viscosity of polymer dispersions has a clear dependence on the particle size distribution (PSD). An example is the rule of thumb that a bimodal PSD enables the reduction of the viscosity with resp…
Diffusion of vacancies and impurities in metals is important in many processes occurring in structural materials. This diffusion often takes place in the presence of spatially rapidly varying stresses. Diffusion under stress is frequently modelled by local approximations to the vacancy formation and diffusion activati…
Local density and generalized gradient approximation time-dependent density functional methods have been used for calculation of the singlet and triplet excited states of nickel-porphine, Ni-tetraphenyloporphine, and Ni-octaethyloporphyrine. Special attention is paid to metal-ligand transitions and d-d transitions. It…
Self-organized pyramidal structures (quadratic or hut-cluster type) of ferrimagnetic spinel ${\text{CoCr}}_{2}{\mathrm{O}}_{4}$ (CCO) are grown by deposition from vapor phase on ${\text{MgAl}}_{2}{\mathrm{O}}_{4}(001)$ substrates. The surfaces of the structures, forming an angle $\ensuremath{\Theta}\ensuremath{\approx…
Most manganites exhibiting colossal magnetoresistant properties are structurally very simple. They are based on a perosvskite structure with the general formula . The electric and magnetic properties strongly depend on the composition (A, A', x ) and eventually on the exact oxygen content. These changing properties ar…
The structure of diblock copolymer melts under a single external electric or shear field, as well as under combined orthogonal external fields was investigated using a cell dynamic system. The phase structure was determined by coupling the effects of the external fields with the original structure of the bulk free of…
Abstract With the anionic precursor [(Tp)Fe III (CN) 3 ] − [ 1 ; Tp: hydrotris(pyrazolyl)borate] as a building block, two trinuclear complexes, [(Tp) 2 Fe III 2 (CN) 6 Mn(CH 3 OH) 4 ]·2CH 3 OH ( 2 ), [(Tp) 2 Fe III 2 (CN) 6 Ni(cyclam)]·2H 2 O ( 3 ; cyclam: 1,4,8,11‐tetraazacyclotetradecane) and a one‐dimensional polym…
AIMS: The aims of this work were to (i) use a bacteriocin produced by Lactobacillus curvatus 32Y active against Listeria monocytogenes to activate polythene films by different methods, (ii) implement a large-scale process for antilisterial polythene films production and (iii) verify the efficacy of the developed films…