Materials Literature
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We use total internal reflection fluorescence (TIRF), streaming current, and optical reflectometry measurements, under a variety of solution conditions, to examine the mechanism of the chicken egg lysozyme reorientation on silica surfaces, originally proposed by Robeson and Tilton (Robeson, J. L.; Tilton, R. D. Langmu…
SBA-15 mesoporous materials were synthesized using the method reported by Zhao et al. Surfactant was removed from as-made materials by means of different techniques: thermal treatment under air atmosphere, solvent washing at different temperatures, and supercritical CO 2 extraction in the presence and absence of cosol…
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Hydrostatic pressure effects on the temperature- and magnetic field dependencies of the in-plane and out-of-plane magnetization of the bi-layered perovskite Sr3Ru2O7 have been studied by SQUID magnetometer measurements under a hydrostatic helium-gas pressure. The anomalously enhanced low-temperature value of the param…
Magnetic properties of a polycrystalline alloy Ni$_{2.19}$Mn$_{0.81}$Ga, which undergoes a first-order magnetostructural phase transition from cubic paramagnetic to tetragonal ferromagnetic phase, are studied. Hysteretic behavior of isothermal magnetization $M(H)$ has been observed in a temperature interval of the mag…
By shifting the reference system for the local-density approximation (LDA) from the electron gas to other model systems one obtains a new class of density functionals, which by design account for the correlations present in the chosen reference system. This strategy is illustrated by constructing an explicit LDA for t…
We consider the adsorption of bovine serum albumin (BSA) on spherical polyelectrolyte brushes (SPB). The SPB consist of a solid polystyrene core of 100 nm diameter onto which linear polyelectrolyte chains [poly(acrylic acid), (PAA)] are grafted. The adsorption of BSA is studied at a pH of 6.1 at different concentratio…
We report the synthesis, characterization, and catalytic activity of bimetallic palladium-platinum dendrimer-encapsulated catalysts (DECs). These materials are prepared by co-complexation of different ratios of palladium and platinum salts to the interior tertiary amines of fourth-generation, hydroxyl-terminated poly(…
The f-electronic structures of the ground states of anionic bis(phthalocyaninato)lanthanides, [Pc(2)Ln](-) (Pc = dianion of phthalocyanine, Ln = Tb(3+), Dy(3+), Ho(3+), Er(3+), Tm(3+), or Yb(3+)), are determined. Magnetic susceptibilities of the powder samples of [Pc(2)Ln]TBA (TBA = tetra-n-butylammonium cation) in th…
We report a route to fabricate two-level structured self-adaptive surfaces (SAS) of polymer materials. The first level of structure is built by a rough polymer film that consists of needlelike structures of micrometer size. The second level of structure is formed by the nanoscopic self-assembled domains of a demixed p…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTExtracellular Biosynthesis of Monodisperse Gold Nanoparticles by a Novel Extremophilic Actinomycete, Thermomonospora sp.Absar Ahmad, Satyajyoti Senapati, M. Islam Khan, Rajiv Kumar, and Murali SastryView Author Information Biochemical Sciences, Catalysis, and Materials Chemistr…
We report the results of a Snell's law experiment on a negative index of refraction material in free space from 12.6 to 13.2 GHz. Numerical simulations using Maxwell's equations solvers show good agreement with the experimental results, confirming the existence of negative index of refraction materials. The index of r…
Filmaufnahme: Ein molekular poröser und konformativ regulärer ultradünner Polymerfilm wird durch selektive Solvensextraktion einer der Komponenten eines schichtweise aufgebauten Stereokomplexaggregats erhalten (siehe Bild; PMMA: Poly(methylmethacrylat), it: isotaktisch, st: syndiotaktisch). Der entstehende Wirt-Film k…
Silicones have become established in a wide variety of applications ranging from electronics to personal care products. It has been estimated recently that there are approximately 3000 commercial silicone products. These are made up from silicone fluids, elastomers and resins. Many hybrid materials also exist whereby…
The freezing-in phenomena that occurred in some orientationally disordered crystals and liquid crystals, either in the metastable or in the stable state, are described in comparison with those in liquids. These observations indicate clearly that the glass transitions observed exclusively in liquids are just one exampl…
Potassium-functionalised alumina (6 wt.% K–Al2O3) was obtained by calcination at 973 K of pure alumina particles (Al2O3) impregnated with an aqueous solution of K2CO3. Both Al2O3 and K–Al2O3 were, then, impregnated with aqueous RhCl3·3H2O, dried at 393 K, and in situ reduced in H2 atmosphere to obtain 1 wt.% Rh/Al2O3…
Powder samples of the magnetically diluted cubic perovskite phases Sr2Fe1 − xGaxTaO6 have been prepared by high temperature ceramic methods. X-Ray powder diffraction data show that the cations occupying the 6-coordinate site are chemically disordered in the range 0.10 ≤ x ≤ 0.40 and that increasing the Ga3+ concentrat…
Microporous hexagonal niobium phosphate synthesized using neutral surfactants of molecular length, C6 to C10 hydrocarbons, by a supramolecular templating mechanism (S0I0) possesses strong hydrophilic character, which leads to high selectivity for catechol formation (95.3%) in the presence of protic solvent (MeOH) in t…
The techniques which allow the numerical evaluation of the statistical properties of the potential energy landscape for models of simple liquids are reviewed and critically discussed. Expressions for the liquid free energy and its vibrational and configurational components are reported. Finally, a possible model for t…
There is a growing belief that the mode coupling theory is the proper microscopic theory for the dynamics of the undercooled liquid above and around a critical temperature T c . In addition, there is some evidence that the system leaves the saddle points of the energy landscape to settle in the valleys at this critica…