Materials Literature
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Mesoporous organic-inorganic hybrid materials, a new class of materials characterized by large specific surface areas and pore sizes between 2 and 15 nm, have been obtained through the coupling of inorganic and organic components by template synthesis. The incorporation of functionalities can be achieved in three ways…
Introduction The aims of this chapter are to develop an appreciation of the adaptive requirements of phytoplankton for pelagic life and to demonstrate the consequences of its embedding in the movements of the suspending water mass. The exploration begins by dismissing the simplistic notion that the essential requireme…
We present a first-principles investigation of the lattice dynamics and thermodynamical properties of a complex hydride ${\mathrm{NaAlH}}_{4}$, a promising material for hydrogen storage. The calculations are performed within the density-functional-theory framework and using a linear response theory. Calculations of th…
Cooler than ice: The structural and thermodynamic properties of high-density amorphous ice (HDA) prepared from two different starting materials, cubic ice and hexagonal ice, are compared. The resulting HDA states, have similar densities, however as shown by X-ray structure factors (see figure) and differential scannin…
Microsecond relaxation dynamics in a cavitating surface layer of bulk water superheated by a TEA CO(2) laser was studied using contact broadband photoacoustic spectroscopy. Damped nanosecond and microsecond oscillatory pressure-tension cycles recorded by an acoustic transducer are related to oscillations of steam bubb…
We present a theoretical investigation of the magnitude and temperature variation of the recently measured [Phys. Rev. B 66, 045302 (2002)] thermal conductivity of undoped and doped $\mathrm{GaAs}$ nanobeams of cross sections $100\phantom{\rule{0.3em}{0ex}}\mathrm{nm}\ifmmode\times\else\texttimes\fi{}250\phantom{\rule…
We synthesized single-crystalline samples of monoclinic ${\mathrm{BaIrO}}_{3}$ using a molten flux method, and measured their magnetization, resistivity, Seebeck coefficient, and nonlinear voltage-current characteristics. The magnetization rapidly increases below the ferromagnetic transition temperature ${T}_{\mathrm{…
Abstract Polymerization of propylene was carried out by using MgCl 2 .EtOH.TiCl 4 .DIBP.TEA.cHMDMS catalyst system in n ‐heptane, where MgCl 2 , EtOH, TiCl 4 , DIBP (diisobutyl phthalate), TEA (triethyl aluminum), and cHMDMS (cyclohexyl methyl dimethoxy silane) were support, ethanol for alcoholation, catalyst, externa…
Alles unter Kontrolle: In Gegenwart des künstlichen doppelt-hydrophilen Blockcopolymers Polyethylenglycol-b-poly(L-glutaminsäure) kristallisieren aus einer Mischung von N,N-Dimethylformamid und Wasser hoch monodisperse Vaterit-Mikrokügelchen (siehe Bild). Änderungen des Lösungsmittelverhältnisses beeinflussen die Morp…
AIMS: Knowledge of the species composition of complex bacterial communities is still very limited. The main objectives of this study were to identify medium-chain-length polyhydroxyalkanoates (mcl-PHAs)-producing bacteria from activated sludge fed with methanol as well as to characterize their PHA operon. METHODS AND…
In the Spheripol process (Basell), high impact polypropylene (hiPP) is produced in two stages in series. First, isotactic polypropylene (i-PP) particles are produced in liquid propylene. These particles are transferred to a gas phase fluidized bed reactor where the elastomeric phase is produced within the isotactic po…
Abstract Nanostructured, transparent, and thermosensitive membranes synthesized by bicontinuous microemulsion polymerization of N ‐isopropylacrylamide (NIPAAm), methyl methacrylate (MMA), and 2‐hydroxyethyl methacrylate (HEMA) using a polymerizable nonionic surfactant, ω‐methoxy poly(ethylene oxide) 40 undecyl α‐metha…
Abstract Polyurethane Networks (PUNs) were synthesized using polyols derived from soybean oil, petroleum, or a blend of the two in conjunction with diisocyanate. The soybean‐based polyols (SBPs) were prepared using air oxidation, or by hydroxylating epoxidized soybean oil. Some of the networks were subjected to severa…
Abstract The spectroscopic and near‐field scanning optical microscopy (NSOM) studies of phosphorescent films doped with colloidal gold nanoparticles (NPs) are presented. Films with a high concentration of 2,3,7,8,12,13,17,18‐octaethyl‐21 H ,23 H ‐porphine platinum( II ) dispersed in a neutral polymer poly[(methyl meth…
Our first principles calculations predict a tetragonal ${\mathrm{BC}}_{3}$ $(t\text{\ensuremath{-}}{\mathrm{BC}}_{3})$ phase originating from the cubic diamond structure. The $t\text{\ensuremath{-}}{\mathrm{BC}}_{3}$ structure is formed by alternately stacking sequence of metallic CBC and insulating CCC blocks, exhibi…
Dislocation patterns have been characterized by transmission electron microscopy and Kikuchi line analysis in pure, polycrystalline aluminium deformed in tension at room temperature in the strain range 0.05–0.34. The angle strain relationship of the dislocation boundaries, their scaling behaviour and the occurrence of…
A method based on the conventional lithographic technique combined with the layer-by-layer (LBL) assembly process is applied to the construction of free-standing micro- and nanostructured matrixes. The method enables controlled shaping and considerable chemical and mechanical stability of the self-assembled monolayers…
The crystallization of paracetamol from ethanol and methanol solutions was used to examine the possibility of using rapid cooling in a tubular flow-through apparatus to manipulate crystal size distribution and morphology. Flow through the tubular portion of the apparatus was laminar, and hence, the device, including a…
We report on the magnetic properties of Co$\_x$Pt$\_{1-x}$ clusters embedded in various matrices. Using a careful analysis of magnetization curves and ZFC susceptibility measurements, we determine the clusters magnetic anisotropy energy (MAE) and separate the surface and volume contributions. By comparing different ch…
We show that SIS Josephson junctions have a threshold resistance, above which the Josephson coupling and the supercurrents become extremely small, due to the shrinking of the Cooper pair size during the Josephson tunneling. Accordingly, the threshold resistance is smaller for higher Tc superconductors with small Coope…