Materials Literature
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Recent advances on the organization and characterization of [Mn12] single molecule magnets (SMMs) on a surface or in 3D are reviewed. By using nonconventional techniques such as X-ray magnetic circular dichroism (XMCD) and scanning tunneling microscopy (STM), it is shown that [Mn12]-based SMMs deposited on a surface l…
Aromatic residues are relatively rare within the collagen triple helix, but they appear to play a specialized role in higher-order structure and function. The role of aromatic amino acids in the self-assembly of triple-helical peptides was investigated in terms of the kinetics of self-association, the nature of aggreg…
We propose a simple model to describe the cavitation-induced breakage of mesoscale filaments during their sonication in solution. The model predicts a limiting length below which scission no longer occurs. This characteristic length is a function of the tensile strength and diameter of the filament, as well as the sol…
Usual introductions of the concept of motion are not well adapted to a subsequent, strictly tensorial, theory of elasticity. The consideration of arbitrary coordinate systems for the representation of both, the points in the laboratory, and the material points (comoving coordinates), allows to develop a simple, old fa…
We develop two new amphiphilic molecules that are shown to act as efficient surfactants for carbon nanotubes in non-polar organic solvents. The active conjugated groups, which are highly attracted to graphene nanotube surface, are based on pyrene and porphyrin. We show that relatively short (C18) carbon tails are insu…
Hydrogels, due to their unique biocompatibility, flexible methods of synthesis, range of constituents, and desirable physical characteristics, have been the material of choice for many applications in regenerative medicine. They can serve as scaffolds that provide structural integrity to tissue constructs, control dru…
Abstract The interaction between {Au 3 (CH 3 NCOCH 3 ) 3 } and {2,4,7‐trinitro‐9‐fluorenone} and the electronic structure and spectroscopic properties of {Au 3 (CH 3 N = COCH 3 ) 3 } n ·{2,4,7‐trinitro‐9‐fluorenone} ( n = 1,2) are studied at the HF, MP2, and PBE levels. Secondary π‐interactions (Au‐fluorenone) were f…
The solubility of Irganox 1010 in (methanol + water), (ethanol + water), and (2-propanol + water) mixed solvents was determined in the temperature range from (293.15 to 333.15) K by a static analytical method. The concentrations of the investigated Irganox 1010 in saturated solution were analyzed by UV spectrometry. A…
Potassium yttrium hafnium tris-(orthophosphate) belongs to the langbeinite-family and is built up from [MO(6)] octa-hedra [in which the positions of the two independent M sites are mutually occupied by Y and Hf in a 0.605 (10):0.395 (10) ratio] and [PO(4)] tetra-hedra connected via vertices into a three-dimensional fr…
Abstract Different theories explaining the origin and the mechanism of the dynamic part of photo‐induced anisotropies which are observed in a large family of chalcogenide glasses will be discussed and analyzed. It is useful to distinguish two kinds of photo‐induced anisotropies, Type 1 which involves a limited concent…
The photochromism of the compound 4'-N,N-dimethylamino-7-hydroxyflavylium incorporated in Pluronic F127 micelles and gels was studied in great detail. The red flavylium ion (AH(+)) or the quinoidal base (A), depending on pH, are the irradiation products of the colorless trans-chalcone (Ct). Absorption and fluorescence…
Production of O atoms, H(D) atoms, and OH(OD) radicals was confirmed in the catalytic decomposition of H 2 O(D 2 O) on a heated Ir filament by laser spectroscopic techniques, such as vacuum-ultraviolet laser-induced fluorescence. The highest steady-state OH density achieved was 2 10 11 cm -3 . The filament temperature…
We propose a method for determining the ground states of lattice-gas (or Ising) models. The method makes possible to find all types of ground states, including chaotic and ordered-but-aperiodic ones, and to identify the first-order phase transitions between them. Using this method, we prove the existence of an infinit…
Abstract A brief review of the most important results of electro‐thermal theory of switching and memory effects is presented. It is shown that this theory is able to explain the large scope of the switching and memory effect experimental findings, including the endurance of modern memory cells.
Einfangen und freilassen: Verbrückte Silsesquioxane dienen als organisch-anorganische Vorstufen für Nanokugeln zum Einkapseln von bioaktiven Molekülen für Wirkstoff-Freisetzungen. Die Nanosysteme (siehe Bild) bestehen aus einem liposomalen Kern, der die bioaktiven Moleküle enthält, und einer Netzwerkschale aus Siliciu…
We investigate the atomic hydrogen adsorption on Mg(0001) by using density-functional theory within the generalized gradient approximation and a supercell approach. The coverage dependence of the adsorption structures and energetics is systematically studied for a wide range of coverage Theta [from 0.11 to 2.0 monolay…
A dual network gel, consisting of a micrometer-scaled network-like structure of a semi-rigid polyion complex nested in a nanometer-scaled polycationic network, has been developed by polymerization of a cationic monomer in the presence of a small amount of semi-rigid polyanion as dopant. Self-assembly and viscoelastic…
Saddle in a spin: The saddle-shaped octaethyltetraphenylporphyrin–imidazole complex [FeIII(oetpp)(HIm)]+ adopts an essentially pure intermediate-spin state between 298 and 173 K in CD2Cl2 solution, the conditions under which the NMR spectra are recorded. This complex has shown, however, a novel spin transition from S=…
We derive one-dimensional equations for the extension and flexure with shear deformation of a piezoelectromagnetic beam with rectangular cross section from three-dimensional equations. The equations obtained are used to analyze magnetoelectric effects in fibers of piezoelectric/piezomagnetic composites. Both static ma…
Polyelectrolyte films structure formed by the "layer-by-layer" (LbL) technique can be enriched by addition of charged nanoparticles like carbon nanotubes and silver or hydroxyapatite nanoparticles, which can improve properties of the polyelectrolyte films or modify their functionality. In our paper we examined the for…