Materials Literature
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A polyaniline composite film with an inclusion of copper(II) tetrasulfophthalocyanine, applied on a glassy-carbon electrode (GC) has demonstrated a mediatory activity in the oxidation of dopamine in acidic and neutral media. The conditions for the formation of a polymer film on the surface of a glassy-carbon electrode…
The ferric uptake regulator (Fur) of Helicobacter pylori is a global regulator that is important for colonization and survival within the gastric mucosa. H. pylori Fur is unique in its ability to activate and repress gene expression in both the iron-bound (Fe-Fur) and apo forms (apo-Fur). In the current study we combi…
A novel phenylacetylene (1) having two hydroxyl groups and a chiral pinanyl group together with the other three related phenylacetylenes has been synthesized and (co)polymerized by using an achiral catalytic system. Among the four monomers, only 1 is suitable to the asymmetric-induced polymerization (AIP). Chiral ampl…
Ab initio studies of the small ( AlSb , InSb , GaSb ) clusters is performed to investigate the changes in structural, vibrational and electronic properties. The calculated results clearly demonstrate that any change in the electronic configuration of the neutral clusters gives rise to noticeable changes in the structu…
Nanocomposite photocatalysts AgI-TiO 2 and AgO-TiO 2 were successfully synthesized by thermolysis method at 200C/2 h. The composite photocatalysts were characterized by XRD, TEM and UV-Vis spectroscopy. The Efficiency of AgI-TiO 2 and AgO-TiO 2 photocatalysts in comparison with pure TiO 2 (P25) was tested by the photo…
Vier verbindet: Ein makrotricyclischer Rezeptor mit zwei konvergenten Calix[4]pyrrol-Einheiten zeichnet sich durch die ungewöhnliche Bindung zweier Ionenpaare aus. Im Fall von Tetrabutylammonium(TBA)-Salzen werden die Paare hoch kooperativ gebunden. MTOA=Methyltrioctylammonium.
In this article, the effect of growth parameters on structural properties of TiO 2 nanowires, synthesized by thermal evaporation process, have been studied. The nanostructures are characterized by scanning electron microscopy and X-ray spectroscopy. Our synthesized TiO 2 nanowires were found, through X-ray diffraction…
Spectrally dependent surface photovoltage measurements were performed with repetitive regime on Cu(In,Ga)S2 absorbers and on Cu(In,Ga)S2/CdS and Cu(In,Ga)S2/In2S3 junctions. The results are correlated to current-voltage investigations of the respective completed solar cells. The measurements show the presence of a spa…
Abstract The subject of this work is the study of a new type of radical polymerization that occurs at elevated temperatures (80–100 °C) in mixtures of acrylates or (meth)acrylates and imine baes (IBA polymerization). The radical character of this polymerization is proven by the determination of copolymerization ratios…
The major reason that there is not more widespread use of titanium and its alloys is the high cost. In this paper, developments in one cost effective approach to fabrication of titanium components - powder metallurgy - will be discussed under various aspects of this technology. The aspects to be discussed are the blen…
Tunneling magnetoresistance (TMR) observed in Fe/GaAlAs/GaMnAs magnetic tunnel junctions depends strongly on relative configuration of magnetizations in the GaMnAs and Fe layers. Using a series of field orientations, we show that non-collinear alignments of magnetization in this structure occur when the magnetic field…
Abstract The unique inwards interweaving morphology of polyamines and polyacids within agarose hydrogels that leads to the formation of striated shells with different porosities within the spherical scaffold is reported. Microcompartments with sophisticated structures are commonly used in drug delivery, tissue enginee…
Abstract Hydroxylamine (NH 2 OH) is an important molecule in biology that serves as an intermediate in the nitrogen cycle, and that can also be utilized as a nitric oxide donor in mammals under certain conditions. In light of this, the interaction of NH 2 OH with hemes in proteins and model systems has gained much att…
Abstract Rubidium guanidinate, RbCN3H4, is the first example of a new class of compounds containing the unsubstituted guanidinate anion CN3H4–. While the first crystal‐structure determination was based on powder X‐ray diffraction, neutron powder and single‐crystal X‐ray diffraction have now been utilized to improve th…
In recent decades, cold atom experiments have become increasingly complex. While computers control most parameters, optimization is mostly done manually. This is a time-consuming task for a high-dimensional parameter space with unknown correlations. Here we automate this process using a genetic algorithm based on diff…
Electron injection into oxide traps of metal/high-k oxide/interlayer/silicon structures is investigated by modeling. We demonstrate the influence on flat-band voltage by the sharpness of the interlayer/silicon interface and by the properties of traps in the oxide. Since charge carrier injection in this kind of structu…
The electrochemical oxidation of sulfur amino acids, i.e., cysteine, cystine, and methionine, is studied on a glassy carbon electrode modified by a film of nickel(II) polytetrasulfophthalocyanine ( poly-NiTsPc ). Poly-NiTsPc demonstrates a selective mediator activity in the oxidation of sulfur amino acids, depending o…
This work reports on the performances of ohmic contacts fabricated on highly p-type doped 4H-SiC epitaxial layer selectively grown by vapor-liquid-solid transport. Due to the very high doping level obtained, the contacts have an ohmic behavior even without any annealing process. Upon variation of annealing temperature…
Two new oligoimides, OI(APAP-6FDA) and OI(APAN-6FDA), which consisted of electron-donating N-(4-aminophenyl)-N-phenyl-1-aminopyrene (APAP) or N-(4-aminophenyl)-N-phenyl-1-aminonaphthalene (APAN) moieties and electron-accepting 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) moieties, were designed and synth…
ABSTRACT The role of dilute concentrations (∼1 wt %) of a photoinitiator, 4,4′‐bis(diethylamino)benzophenone, on the processability and properties of the resulting wet‐spun polyacrylonitrile (PAN) fibers are reported. Rheology measurements show no adverse effect on the viscosities of solutions by the addition of the p…