Materials Literature
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There exist 12 crystallographically distinct Al-sites in the ZSM-5 zeolite, associated with which there are various Na-sites. Understanding their locations, while being the key to the understanding of the catalytic properties of this material, remains a great challenge in both experiment and theory. We present here a…
A theoretical study on the nonlinear optical properties of both gold and nickel slit arrays inlaid with a third-order nonlinear dielectric medium is presented. In particular, we investigate the optical Kerr effect and third harmonic generation. The geometrical parameters, along with the optical properties of each meta…
A pilot-scale rubberwood dryer was constructed and injected with superheated steam and hot air to study the effect of the hybrid system on the drying rate and mechanical properties of the wood. A total of 300 pieces of rubberwood boards, each with dimensions of 1000 mm long × 76.2 mm wide × 25.4 mm thick, were stacked…
In the present paper, in the context of the linear theory of heat-flux dependent thermoelasticity for micropolar porous media, we derive a uniqueness theorem with no positive definiteness assumption on the elastic constitutive coefficients. Moreover, we prove, under non homogeneous initial conditions, a reciprocal rel…
All available thermodynamic and phase diagram data for the ternary reciprocal system Al 2 O 3 –SiO 2 –AlF 3 –SiF 4 have been critically reviewed. The oxyfluoride liquid solution was modeled using the M odified Q uasichemical M odel in the Q uadruplet A pproximation and the most reliable data have been used to optimize…
We report on the electronic structure of poly[2,6-(4,4-bis- (2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b']dithiophene)-alt-4,7(2,1,3-benzothiadiazole)] (PCPDTBT), a promising low-band-gap donor material for efficient bulk heterojunction organic solar cells. Electronic properties of interfaces formed between PCPDTBT and pr…
In this work three complete isothermal sections of the Ni–Sn–Zn system at 700, 800 and 900 °C are presented. They were constructed based on experimental investigation of more than 60 alloy samples. Powder XRD, single crystal XRD, EPMA, and DTA measurements on selected samples were carried out. Two new ternary compound…
C-H-, O-H- oder C-O-Aktivierung? Der Nicht-Häm-Komplex [(bpg)FeIVO]+ aktiviert die αC-H-Bindung primärer Alkohole im Vakuum durch H-Abstraktion im geschwindigkeitsbestimmenden Schritt (siehe Schema). Der Effekt wirkt jedem Versuch einer Reaktivitätssteigerung entgegen, die aus einer Erhöhung der formalen Oxidationsstu…
Tokamaks are the most promising approach for nuclear fusion on earth. They are toroidal machines where the plasma is heated in a ring-shaped vessel and kept away from the vessel by applied magnetic fields. To achieve high performance in tokamaks, plasmas with elongated poloidal cross-section are needed. Such elongated…
Planck's law of thermal radiation is limited to equilibrium systems that have a definite temperature and do not carry any heat flux. Here we extend it to steady-state systems with a constant heat flux. The obtained formulas explicitly describe the spectrum of thermal radiation in every direction and provide a sound ba…
Highly crystalline mesoporous anatase TiO(2) is prepared through supramolecular self-assembly and by utilizing cetyltrimethylammonium bromide (CTAB) as templating material. Photoanodes of dye-sensitized solar cells (DSSCs) made from these TiO(2) nanoparticles are found to have a high specific surface area of 153 m(2)/…
Predicting three-phase relative permeability by network models requires reliable models for hydraulic conductance of films and layers stabilized by capillary forces at the pore level. We solve the creeping flow approximation of the Navier-Stokes equation for stable wetting and intermediate layers in the corner of angu…
Dye solar cells (DSCs) are a complementary type of solar cell devices, and particularly interesting because they can be assembled in new and more exotic architectures compared to conventional solar cells. These systems need to be simulated preserving the real geometry of the device. In this paper, we use a 3-D model o…
Abstract The main shrinkage and dimensional stability impact factors are processing temperature and pressure. For that reason, the pvT-behaviour is often used to estimate plastic part shrinkage. As there are still differences between predicted and actual part dimensions, a closer look was taken at these influencing fa…
Abstract Homoleptic copper and silver compounds of a series of pyrimidine‐2‐thionato derivatives (RpymS–; R = 4,6‐Me2,5‐Et; 4‐CF3; 4,6‐CF3,Ph) have been synthesized by electrochemical oxidation of anodic metal (copper or silver) in a cell containing an acetonitrile solution of the appropriate thione and a small amount…
We have investigated magnetic properties of the FeAl${}_{2}$ and Fe${}_{2}$Al${}_{5}$ intermetallic compounds. By measuring the zero-field-cooled and field-cooled static (dc) magnetic susceptibilities in low and high magnetic fields, the frequency-dependent (ac) susceptibility, the magnetization versus the magnetic fi…
A corona discharge-assisted technique for spreading of a gently deposited dielectric droplet into a uniform thin film over a dry isothermal conductive substrate is proposed. The surface charge was built up over the droplet interface through ion bombardment using a sharp emitter electrode. Interaction of the surface ch…
Bending tests are commonly used for characterization of materials at the nanoscale. Beams are also key elements of nanomechanical and nanoelectromechanical devices. This paper is motivated by recent experiments of large deflections of chromium cantilevers and modeling based on the classical large deflection beam theor…
This paper investigates the origin and reduction of self-heating effects in single-crystal silicon-on-glass (SiOG) thin-film transistors (TFTs). A hump forms in the transfer characteristics of p-channel SiOG TFTs when the temperature of the devices is increased either by direct heating or electrical biasing. The size…
This paper describes an analysis of the damping of unbalanced magnetic pull (UMP) in salient pole synchronous machines due to parallel stator circuits. Measurements of the UMP and currents in the parallel circuits have been performed on a 12-pole generator with the stator displaced relative to the rotor, creating a st…