Materials Literature
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The anion-exchange properties of second-stage [Zn 2 Cr(OH) 6 ]Cl 0.5 (succinate) 0.25 · n H 2 O (Zn 2 Cr-Succ/Cl) and [Zn 2 Cr(OH) 6 ]Cl 0.5 (tartrate) 0.25 · n H 2 O (Zn 2 Cr-Tart/Cl) materials were investigated by means of time-resolved in situ energy-dispersive X-ray diffraction (EDXRD). Selective anion-exchange re…
Eines nach dem anderen: Dünne Filme der [Fe(pyrazin){M(CN)4}]-Koordinationspolymere (M=Ni, Pd oder Pt) wurden sequenziell durch koordiniertes Binden an Goldoberflächen erhalten (siehe Schema). Diese Multischichten zeigen bei Raumtemperatur Spin-Crossover-Phänomene mit Hysterese.
A general and efficient synthesis of fused five-membered porphyrins from the readily available beta-brominated porphyrins via palladium-catalyzed intramolecular cyclization has been developed, which can be applied for various metal complexes of beta-brominated porphyrins or free base ones and generally results in good…
Partial oxidation of propene is promoted by Au following deposition of atomic oxygen (0.3 ML) via O3 decomposition on Au(111) at 200 K. Several partial oxidation products--acrolein, acrylic acid, and carbon suboxide (O=C=C=C=O)-are produced in competition with combustion to CO2 and H2O. Acrolein is the primary partial…
Carboxylate-bridged complexes of transition metals, M(II)=Mn(II), Fe(II), Co(II), Ni(II), Zn(II), were synthesised by reaction of M(II) salts with dl-malate and L-malate under hydrothermal conditions. These complexes form four series of compounds, which have been fully characterised structurally, thermally and magneti…
We have prepared the nanocomposites of a polyether-type waterborne polyurethane (PU) incorporated with different amounts (17.4-174 ppm) of gold (Au) nanoparticles ( approximately 5 nm). The nanocomposite containing a certain amount (43.5 ppm) of gold was previously demonstrated to possess the optimal thermal and mecha…
This paper discusses the use of the inverted (B-based) Preisach model and its incorporation into the finite-element method (FEM). First, the B-based Preisach model is studied thoroughly along with the forward (H-based) Preisach model, highlighting the advantages and disadvantages of both models. The study confirms tha…
A new redox molecule-based half-adder with tetrathiafulvalene (TTF) was reported for the first time. This half-adder employs electrochemical and chemical oxidations (NOPF 6 ) as input signals and absorbances at 350 and 435 nm as output signals. It is interesting to note that this new molecule-based half-adder shows re…
A homologous set of porphyrin derivatives possessing an isocyclic five-membered ring appended with an amidinium functionality has been used to examine proton-coupled electron transfer (PCET) through well-characterized amidine-carboxylic acid interfaces. Conjugation between the porphyrin chromophore and the amidinium i…
This paper simulates the expected device performance and scaling perspectives of carbon nanotube (CNT) field-effect transistors with doped source and drain extensions. The simulations are based on the self-consistent solution of the three-dimensional Poisson-Schroumldinger equation with open boundary conditions, withi…
Using three crystal polymorphs of indomethacin (IMC), we tested two interpretations of the enhanced crystal growth kinetics near the glass transition temperature Tg. This enhancement refers to the stronger temperature dependence of liquid viscosity eta than crystal growth rate (corrected for thermodynamic driving forc…
Single particle Brownian dynamics simulation methods are employed to establish the full trajectory level predictions of our nonlinear stochastic Langevin equation theory of activated hopping dynamics in glassy hard sphere suspensions and fluids. The consequences of thermal noise driven mobility fluctuations associated…
Rodlike, olivelike, pineapplelike, and particlelike nanocrystals of theYVO4:Eu (5 at. % Eu) were synthesized by a hydrothermal reaction with different conditions, respectively. The rodlike nanocrystal has a rectangular cross-section with about 35 x 60 nm2 and a length of about 220 nm. The olivelike nanocrystal has an…
Adsorption of hydrogen molecules on platinum-doped single-walled zigzag (8,0) boron nitride (BN) nanotube is investigated using the density-functional theory. The Pt atom tends to occupy the axial bridge site of the BN tube with the highest binding energy of -0.91 eV. Upon Pt doping, several occupied and unoccupied im…
In this article, a wide range of latexes are evaluated as possible foam stabilizers. These include near-monodisperse, poly(N-vinyl pyrrolidone)-stabilized polystyrene [PNVP-PS] latexes with diameters ranging from 170 nm to 1.62 microm, submicrometer-sized poly(ethylene glycol)-stabilized polystyrene [PEGMA-PS] latex p…
Alkalies are considered to be simple metals at ambient conditions. However, recently reported theoretical and experimental results have shown an unexpected and intriguing correlation between complex structures and an enhanced superconducting transition temperature in lithium under pressure. In this article we analyze…
Inelastic effects arising from electron-phonon coupling in molecular Aharonov-Bohm (AB) interferometers are studied using the nonequilibrium Green's function method. Results for the magnetoconductance are compared for different values of the electron-phonon coupling strength. At low bias voltages, the coupling to the…
We study the formation and evolution of localized geometrical defects in an indented cylindrical elastic shell using a combination of experiment and numerical simulation. We find that as a symmetric localized indentation on a semi-cylindrical shell increases, there is a transition from a global mode of deformation to…
Time-resolved Kerr rotation spectroscopy is used to monitor the room temperature electron spin dynamics of optical telecommunication wavelength AlInGaAs multiple quantum wells lattice-matched to InP. We found that electron spin coherence times and effective g-factors vary as a function of aluminum concentration. The m…
To explain the effect of electron density saturation at high phosphorus concentrations the model of negatively charged phosphorus clusters was compared with the experimental data. A number of negatively charged clusters incorporating a point defect and phosphorus atoms were investigated at temperatures of 920 and 1000…