Materials Literature
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Einfach und leistungsfähig: Die Reaktionskinetik an Oberflächen heterogener Katalysatoren wird unter Einbeziehung der chemischen Potentiale neu formuliert. Anhand dieses Formulismus wird ein Ansatz zur Katalysatorsuche aufgestellt, der ohne aufwendige Berechnungen der Reaktionsbarrieren und detaillierte kinetische Ana…
Abstract In this paper we report a new method for Cu(In,Ga)Se2 deposition for solar cell application. Differently from the common co‐evaporation process, an alterative approach for thin film Cu(In,Ga)Se2 has been tested: the sputtering deposition of metal elements combined with the selenium evaporation. We have studie…
Freezing is dangerous to cellular organisms because it causes an increase in the concentration of ions and other solutes in the plasma, denatures biomolecules and ruptures cell membranes. Some cold-adapted organisms can survive at subzero temperatures by producing proteins that bind to and inhibit the growth of ice cr…
Hilfreiche Fluorierung: Eine Trifluormethylgruppe stabilisiert die Titelverbindung (siehe Bild; Au gelb, C grau, F grün, O rot), die sich bei tiefer Temperatur aus [PPh4][Au(CF3)2] und BF3⋅OEt2 bildet. Jedes Molekül ist trigonal umgeben und zeigt aurophile Wechselwirkungen mit drei nahen Nachbarn in einer insgesamt Dr…
Abstract In this work, nonisothermal film blowing process analysis for non‐Newtonian polymer melts has been performed theoretically by using minimum energy approach and the obtained predictions were compared with both, theoretical and experimental data (internal bubble pressure, take‐up force, bubble shape, velocity a…
We studied the solubilization of oil in the C(16)E(8)/hexadecane/H(2)O system. Close to the phase inversion temperature (PIT), the system, at equilibrium, can form either homogeneous states (i.e., microemulsions) at high surfactant concentrations or three-phase states at lower concentrations. We show that, under gentl…
Abstract The main objective of this study was to evaluate the effect of oxalic acid (OA) wood chips pretreatment prior to refining, which is done to reduce energy used during the refining process. Selected mechanical and physical performances of medium-density fiberboard (MDF) – internal bonding (IB), modulus of elast…
In this study, ferritic stainless steel (AISI 430)/medium-carbon steel (AISI 1030) couples, having two different properties of 10 mm thick, were welded by using the synergic controlled pulsed (GMAW-P) and manual gas metal arc welding (GMAW) techniques. Constant wire feed speed, voltage, welding speed, and gas flow rat…
The Landau-de Gennes free energy plays a central role in the macroscopic theory of anisotropic fluids. Here, the ideal, entropic contribution to this free energy-that is always present in these systems, irrespectively of the detailed form of interactions or applied fields-is derived within the quasiequilibrium ensembl…
Metal/carbon nanocomposites find use in many potential applications, in areas such as batteries, catalysts, inks, polymer additives, and solar cells. Nickel/carbon nanocomposites are widely used as heterogeneous catalysts in oil processing and other catalytic reactions. Here we describe a novel microwave-assisted synt…
Optical security devices applied to banknotes and other documents are exposed to different types of harsh environments involving the cycling of temperature, humidity, chemical agents, and tribomechanical intrusion. In the present work, we study the stability of optically variable devices, namely metameric interference…
Die DNA-Hybridisierung Thrombin-bindender Aptamere (TBAs) unter Bildung einer selbstorganisierten Monoschicht von Goldnanopartikeln (Au-NPs) wurde genutzt, um die Koagulationswirkung von Thrombin zu steuern. Die hTBA15/hTBA29/cDNA-Au-NPs konnten die hTBA15- und hTBA29-Einheiten in geeignetem Abstand und passender Orie…
Abstract Four novel two‐dimensional (2D) donor–acceptor (D‐A) type copolymers with different conjugated side chains, P1, P2, P3, and P4 (see Fig. 1 ), are designed and synthesized for the application as donor materials in polymer solar cells (PSCs). To the best of our knowledge, there were few reports to systematicall…
Here we discuss the influence of a substrate on transmission through subwavelength holes in metallic films. In particular, we show that in the case of transmission maxima associated with localized resonances of the apertures, that the wavelength at which this maximum occurs are strongly influenced by the presence of a…
In this article, a passive harmonic filter design scheme is proposed for offshore power distribution systems with subsea cables. Such an offshore system requires more reliable harmonic filters due to parallel resonance and the resultant large harmonic distortions in the system caused by subsea cables. The new passive…
The profiles of temperature and gas component concentrations along the circulating fluidized-bed (CFB) riser height have been successfully simulated by the developed process simulation model of coal combustion in a 30 kW CFB combustor based on Aspen Plus. The average bed temperature increases from about 1025 to 1160 K…
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…