Materials Literature
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We report on singlet-singlet annihilation and exciton diffusion in as-prepared p-type and annealed n-type thin films of the low-bandgap quinoidal quaterthiophene [QQT(CN)4] using ultrafast transient absorption measurements. The decay dynamics of exciton populations are well described by a one-dimensional diffusion-lim…
A remarkable shear induced self-thickening of chitosan-graft-polyacrylamide aqueous solution was observed. After the polyelectrolyte solution presenting shear thinning was subjected to a high-rate shear for several minutes, their viscosities recovered and then a much higher zero shear viscosity than the original one a…
This paper investigates the Jahn-Teller effect in the icosahedral cation B(80)(+) and compares the descent in symmetry with that in C(60)(+). For both cations the icosahedral ground state is a (2)H(u) state, which exhibits a H ⊗ (g ⊕ 2h) Jahn-Teller instability. A detailed construction of the potential energy surface…
This paper describes the hydrothermal chemistry of alkali hafnium fluorides, including the synthesis and structural characterization of five new alkali hafnium fluorides. Two ternary alkali hafnium fluorides are described: Li(2)HfF(6) in space group P31m with a = 4.9748(7) Å and c = 4.6449(9) Å and Na(5)Hf(2)F(13) in…
This study investigates the features of a new type of delivery system prepared by combining a natural outer eggshell membrane (OESM) with emulsified microcapsules. The loading efficiency, controlled release properties, and forming mechanisms of the prepared system were studied. The polysaccharide/protein microcapsules…
EuNi 2 Ge 2 is antiferromagnetic below T N ≍ 30 K with an effective moment µ eff ≍ 7.7 μ B , indicating the 4f 7 electron configuration (Eu 2+ ) in the ground state. In order to investigate the electronic state of EuNi 2 Ge 2 , we have simultaneously measured thermopower S and electrical resistivity ρ at the temperatu…
We have investigated the temperature (40-295K) dependence of the Raman active phonons of BiCu2PO6 single crystals oriented along a- and b- axis. The comparison between the two orientations did not show any remarkable effect along the b-axis (two-leg zigzag spin ladder direction). At low temperatures the modes appear s…
The spin-orbit Mott state in the novel quasi-2D iridate Ba 2 IrO 4 was studied on crystal structure, electrical resistivity, magnetic susceptibility, and μSR experiments. Ba 2 IrO 4 crystallizes in a K 2 NiF 4 -type structure ( I4/mmm, a = 4.030(1) Å and c = 13.333(4) Å) which includes IrO 2 square planer lattices wit…
Hollow fiber adsorbents have potential to overcome high pressure drop, adsorbent bed settling, and channeling problems in fixed bed adsorption systems. A coaxial spinning method was used for the synthesis of hollow fibers with an outer layer of electrically conducting polyvinylidene fluoride/carbon black composite wit…
Electron paramagnetic resonance (EPR) spectroscopy of spin-labeled membrane proteins is a valuable biophysical technique to study structural details and conformational transitions of proteins close to their physiological environment, e.g., in liposomes, membrane bilayers, and nanodiscs. Unlike in nuclear magnetic reso…
State of the art atmosphere plasma sources are operated with frequencies in kHz/MHz regions and all high power plasma jets make use of tungsten electrodes. A microwave plasma torch has been developed at FH Aachen for the application in various fields. The advantages over other plasma jet technologies are the high effi…
Abstract We report on experiments allowing to set an upper limit on the magnitude of the spin Hall effect and the conductance by edge channels in quantum wells of PbTe embedded between PbEuTe barriers. We reexamine previous data obtained for epitaxial microstructures of n‐type PbSe and PbTe, in which pronounced nonloc…
Adult cardiomyocytes (CMs) have very limited capacity to regenerate. Therefore, there is a great interest in developing strategies to treat infarcted CMs that are able to regenerate cardiac tissue and promote revascularization of infarcted zones in the heart. Recently, stem cell transplantation has been proposed to re…
Covalent substrates can give rise to a variety of magnetic interaction mechanisms among adsorbed transition-metal atoms building atomic nanostructures. We show this by calculating the ground state magnetic configuration of monoatomic $3d$ chains deposited on a monolayer of Cu${}_{2}$N grown on Cu(001) as a function of…
Protein-protein interactions are responsible for the transfer of information inside the cell and represent one of the most interesting research fields in structural biology. Unfortunately, after decades of intense research, experimental approaches still have difficulties in providing 3D structures for the hundreds of…
Varying composition of π-donor/acceptor moieties has been considered as an effective strategy for fine-tuning of the electronic properties of D-A conjugated copolymers. In this study, the change of optoelectronic properties with the change of donor/acceptor ratios is investigated on the basis of first-principles densi…
Abstract Quantum dots (QDs) and dye co-sensitized solar cells have attracted substantial interest due to the enhanced light absorption for conversion efficiency improvement. To overcome the charge-collection issue and the QD degradation in the electrolyte, here we report our investigations on adding a nano-TiO2 interf…
We propose a low-temperature laser annealing method of a underwater laser annealing (WLA) for polycrystalline silicon (poly-Si) films. We performed crystallization to poly-Si films by laser irradiation in flowing deionized-water where KrF excimer laser was used for annealing. We demonstrated that the maximum value of…
By taking advantage of a natural and abundant polymer as well as a straightforward film formation technique, this paper focuses on the conception and use of a new alternative tool for thermo-controlled cell detachment. Thermoresponsive xyloglucan was produced after partial galactose removal by a 24 h reaction with β-g…
We investigate theoretically the nonequilibrium finite-frequency current noise in a four-terminal quantum point contact of interacting helical edge states at a finite bias voltage. Special focus is put on the effects of the single-particle and two-particle scattering between the two helical edge states on the fraction…