Materials Literature
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We investigate electromagnetic wave propagation through one-dimensional stacks arranged as truncated pre-fractal Cantor multilayer. Taking into account materials' dispersion as well as real absorptive losses, we studied the spectral and spatial emissivity in both on-axis and off-axis direction. The typical cavity mode…
Molekülverformung mit makroskopischen Auswirkungen: Eine Photoisomerisierung erzeugt in einer Hybridanordnung eine Molekülverformung auf der Mikroskala, die zu einem makroskaligen Verbiegen einer Kompositmembran verstärkt werden kann. Nanometergroße Molekülkristalle, die ungleichmäßig in einer Polymermatrix verteilt s…
A one-dimensional model of coupled spin-1/2 spins and pseudospin-1/2 orbitals with nearest-neighbor interaction is rigorously shown to exhibit spin-orbital separation by means of a nonlocal unitary transformation. On an open chain, this transformation completely decouples the spins from the orbitals in such a way that…
We present an experimental study of electron-electron exchange interaction in self-assembled CdTe/ZnTe quantum dots based on the photoluminescence measurements. The character and strength of this interaction are obtained by simultaneous observation of various recombination channels of a doubly negatively charged excit…
We have observed thin film removal from glass substrates after the irradiation of Ni films with femtosecond laser pulses in air. It was found that the material removal threshold and laser-induced morphology are dependent on film thickness. With decreasing thickness, material removal transitions from intra-film separat…
Wasserspaltung: Bislang wurde angenommen, dass durch Dotieren von Halbleiterphotokatalysatoren mit Übergangsmetallkationen mit partiell gefüllten d-Orbitalen die photokatalytische Aktivität deutlich abfällt. Nun wurde gefunden, dass Dotieren eines BaTaO2N-Photokatalysators mit W-Spezies zu einer siebenfach höheren Was…
Sandwich sheet structures are gaining a wide array of applications in the aeronautical, marine, automotive, and civil engineering fields. Since such sheets can be subjected to forming/stamping processes, it is crucial to characterize their limiting amount of deformation before trying out any forming/stamping process.…
Abstract Optical properties of the Cu2ZnGeS4 bulk single crystals were characterized by using Raman spectroscopy and photoluminescence spectroscopy technique. The strongest lattice vibration mode of this compound observed at 359 cm–1 and less intensive modes at 273, 291, 332, 370, 383, 405 and 414 cm–1. PL spectra of…
We study distributions of the partition function zeros in the complex temperature plane for a square-lattice homopolymer with nearest-neighbor (NN) and next-nearest-neighbor (NNN) interactions. The dependence of distributions on the ratio of NN and NNN interaction strengths R is examined. The finite-size scaling of th…
Different alloys from ferritic‐martensitic, austenitic, and nickel‐based were exposed beneath a 60%NaNO3–40%KNO3 eutectic mixture in air for 500 h at 600 °C in order to estimate the corrosion loss of the different classes of alloys and to evaluate the corrosion mechanism. Investigations were carried out by metallograp…
Specific Edge Load (SEL) and Specific Energy Consumption (SEC) are nowadays the most popular parameters for defining the intensity of pulp refining. As a result, these factors are widely used in industrial practice. The purpose of this research was to determine limitations connected with use of these parameters during…
Abstract Wurtzstannite‐type Cu2ZnGeS4, Cu2ZnSiSe4 and Cu2ZnSiS4 single crystals were grown by chemical vapor transport method using iodine as transport agent. Raman spectra of obtained crystals were investigated and 17, 11 and 18 peaks were observed for Cu2ZnGeS4, Cu2ZnSiSe4 and Cu2ZnSiS4, respectively. In all cases,…
Tuberculosis remains as one of the main cause of mortality worldwide due to a single infectious agent, Mycobacterium tuberculosis. The aroK-encoded M. tuberculosis Shikimate Kinase (MtSK), shown to be essential for survival of bacilli, catalyzes the phosphoryl transfer from ATP to the carbon-3 hydroxyl group of shikim…
The dynamics of singlet and triplet exciton transfer in coupled polymer chains are investigated within the Su-Schrieffer-Heeger+Pariser-Parr-Pople model including both electron-phonon (e-p) coupling and electron-electron (e-e) interactions, using a multi-configurational time-dependent Hartree-Fock dynamic method. In o…
We present an innovative concept for the design of electrorheological fluids (ERF) based on a dispersed phase of rigid-rod-shaped metallo-supramolecular polyelectrolytes (MEPE) intercalated in mesoporous SBA-15 silica. While applying an electric field to this composite dispersed in silicone oil, rheological measuremen…
The effect of electrical doping on the hole carrier mobility in a p-doped organic semiconductor is reported. We focus on the ohmic current region where the density of carriers generated by doping is much higher than that of injected carriers. We can therefore analyze the effect of doping on the charge-carrier mobility…
The magnitude and sign of the volume change upon protein unfolding are strongly dependent on temperature. This temperature dependence reflects differences in the thermal expansivity of the folded and unfolded states. The factors that determine protein molar expansivities and the large differences in thermal expansivit…
Due to the small exciton diffusion length in organic materials, the donor-acceptor heterointerface in simple bilayer solar cells must be placed in close proximity to the bottom electrode. This makes great demands on the planarity of the base layer, since a non-uniform topography can cause adverse shorting through over…
A light-emitting diode (LED) structure containing p-type GaN layers with two-step Mg doping profiles is proposed to achieve high-efficiency performance in InGaN-based blue LEDs without any AlGaN electron-blocking-layer structures. Photoluminescence and electroluminescence (EL) measurement results show that, as the hol…
The straightforward synthesis of a series of poly(thioether)s by photoinduced thiol-ene click polyaddition of α,ω-alkylene thiols is reported. It is found that linear and telechelic poly(thioether)s can be directly obtained from α,ω-alkylene thiols with, for example, alkyl chain length of m = 1,2,3, and 9. The reactio…