Materials Literature
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We demonstrate that pressure-induced magnetic phase transitions can be detected by optical second harmonic generation (SHG) measurements in diamond anvil cells and show that the transition from an acentric to a centrosymmetric magnetic structure occurs in Cr2O3 at 10(1) GPa. The pressure dependence of the Néel tempera…
A benzo[h]quinolyl ligand provided pentacoordinate character for silicon in dibenzo[b,f]silepins. Substituents on the silicon center determined both conformations of the dibenzosilepin and luminescence properties in relation to charge transfer.
The solubility isotherms for the ternary system Li 2 SO 4 –MgSO 4 –H 2 O and the quaternary system Li 2 SO 4 –K 2 SO 4 –MgSO 4 –H 2 O at T = 273.15 K were determined by the isothermal equilibrium method. A Pitzer–Simonson–Clegg (PSC) model was used to simulate the properties of the binary and ternary systems of the qu…
A common theoretical approach to calculating reaction kinetics is to approximate a high-dimensional conformational search with a one-dimensional diffusion along an effective reaction coordinate. We employed Brownian dynamics simulations to test the validity of this approximation for loop formation kinetics in the worm…
In this letter, we propose a different model to determine the recombination oscillator strength of trions and biexcitons for bound and unbound cases in the effective mass approximation. The validity of our model has been confirmed by the radiative lifetime of the trion and biexciton in a spherical quantum dot. The res…
New heterogeneous photodynamic sensitizers, in which the active phase, (polycholinyl)tetra-3-phenylthiophthalocyanine of aluminum, grafted to aminopropylated silica gels with pore sizes of 10, 25 and 75 nm, were tested in MS2 coli phage and poliovirus photoinactivation. In aqueous suspensions of the photosensitizers,…
In terms of electrochemical behaviour, a transparent conductive oxide (TCO)-less dye-sensitized solar cell (DSSC) with two metal foils was compared with those of a metal foil-based DSSC with a TCO-coated substrate. By virtue of electrochemical impedance spectroscopy, intensity modulated photocurrent spectroscopy, inte…
Abstract Mono‐oxo‐bis‐dithioveratrol‐molybdate was synthesized, structurally characterized, and investigated with respect to its oxo‐transfer activity. The latter was compared with the activity of the analogous tungsten complex. The title complex is a structural model for molybdopterin bearing arsenite oxidase and bot…
The ring angular correlation function is a characteristic feature determined by the particle structure. Averaging over a large number of ring angular correlation functions calculated from x-ray diffraction patterns will cancel out the cross correlations between different particles and converge to the autocorrelation f…
We study the reversal mechanism between opposite closed flux states of ferromagnetic nanorings driven by an azimuthal magnetic field. The reversal proceeds via the formation of ${360}^{\ensuremath{\circ}}$ domain walls, and we show that the role of interacting nucleation sites is essential for the process to take plac…
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…