Materials Literature
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First-principles calculations have been used to investigate the impurity stability and the magnetic properties of Mn doped InP nanowires. The results reveal that the surface of the nanocrystals play a fundamental role on the impurity stability and on the magnetic properties of InP nanowires diluted with Mn. The format…
The magnetization curves of $\mathrm{Ca}\mathrm{Mn}{\mathrm{O}}_{3\ensuremath{-}\ensuremath{\delta}}$ ($\ensuremath{\delta}=0.20$ and 0.25) single crystals in pulsed magnetic fields up to $350\phantom{\rule{0.3em}{0ex}}\mathrm{kOe}$ were studied, and the threshold increase of magnetization at ${H}_{\mathrm{cr}}\ensure…
Performance parameters have been presented that can be used to compare the focusing performance of different optical systems, including the effect of pupil filters. These were originally given for the paraxial case and recently extended to the high-aperture scalar regime. We generalize these parameters to the full vec…
Verdrehte Ringe: Expandierte Porphyrine haben Möbiusband-Konformationen im Kristall und in Lösung. Die hohe Beweglichkeit einzelner Gruppen ermöglicht den temperatur- und lösungsmittelabhängigen Wechsel zwischen Hückel- und Möbius-Aromatizität. Metallionen der Gruppe 10 wirken als Klammern, die die notwendige Verdrill…
Abstract The effective thermal conductivity behavior of vulcanized perfluoromethyl vinyl ether (PMVE) rubber filled with various inorganic fillers was investigated and analyzed with thermal conductivity models. Experimental results showed that there was no significant improvement in the thermal conductivity of PMVE ru…
The way a liquid drop that is in contact with a nanoporous substrate evolves essentially depends on the competition between imbibition and spreading. Although the scaling behavior of this competitive process with liquid viscosity is important for various applications requiring the filling of nanoporous substrates (tem…
We present a quantum-chemical analysis of the central metal ion's effect on first hyperpolarizabilities and two-photon absorption (TPA) cross sections at the infrared region of a series of push-pull porphyrins whose synthesis and NLO properties have been reported earlier (J. Am. Chem. Soc. 2005, 127, 9710). The molecu…
Abstract In electrospinning, the structure of nanofibers, which is affected by polymer solution parameters and processing conditions, influences the physical characteristics of nanofiber mats. In this study, under optimum conditions of electrospinning, the concentration of polyacrylonitrile (PAN) was changed from 11 t…
A theoretical model is suggested which describes the generation of nanoscale cracks in deformed nanocrystalline metals and ceramics. In the framework of the model, cracks are generated in the superposition of the stress fields of interfacial edge dislocations and disclination dipoles formed at interfaces (grain and in…
Simulation of Schottky barrier carbon nanotube field effect transistors (SB-CNTFETs) is presented to yield the electrostatic potential, carrier concentration and current within the device. The simulator is based on a self-consistent solution of Poisson's equation and the carrier transport equation. The finite ele…
We describe a simple method to fabricate blazed gratings used in the extreme ultraviolet wavelength region. The method uses an argon and oxygen mixed-gas ion beam to directly etch the grating substrate through a rectangular profile photoresist grating mask. With this method the etched grating groove profile can be wel…
The thermal degradation products of poly(methyl meth acrylate) model compounds in an ambient atmosphere were mapped via high-resolution electrospray ionization quadrupole ion trap time of flight (Q-ToF) mass spectro metry.
A comparison of different methods of X-ray diffraction analysis for the determination of crystallite size and microstrain; namely, line profile analysis, Rietveld refinement, and three approaches based on the variance method, is presented. The analyses have been applied to data collected on a ceria sample prepared by…
Abstract The water and fuel absorption and desorption characteristics have been studied of aircraft fuel tank sealants. The sealants were an epoxy‐cured polythioether and a MnO 2 ‐cured polysulphide. The effect of the water and fuel exposure on the glass transition temperature was also investigated. Water diffusion wa…
The electronic, magnetic, and mechanical properties of CaCu3V4O12 are investigated by use of the density functional theory method. The calculated results indicate that CaCu3V4O12 is a half-metallic and ferrimagnetic compound. The magnetic coupling for Cu-V is antiferromagnetic, while those for Cu-Cu and V-V are ferrom…
Rietveld refinement using synchrotron powder X-ray diffraction data of the ranciéite, Ca 0.19 K 0.01 (Mn 4+ 0.91 ◻ 0.09 )O 2 ⋅0.63H 2 O, crystal structure reveals significant differences from that reported previously. The interlayer H 2 O molecules occupy sites halfway between the Mn,O octahedral sheets. The Mn sites…
In this work, we report the purification and characterization of struthiocalcins (SCA-1 and -2), two proteins isolated from the intramineral part of the ostrich’s eggshell. To obtain a better insight about their solubility behavior at different temperatures in water and in buffer solution, dynamic light scattering exp…
Deprotonation of the nitrogen atoms of the two pyrrole rings of 1,3-bis-{[(1'-pyrrol-2-yl)-1,1'-dimethyl]methyl}benzene with KH followed by further reaction with either VCl 3(THF) 3 or with VCl 2(TMEDA) 2 respectively gave the paramagnetic complexes [1,3-bis-{[(1'-pyrrol-2-yl)-1,1'-dimethyl]methyl}benzene]VCl(DME) ( 1…
Abstract Composite films composed of poly(methyl methacrylate) (PMMA) and the nematic‐type liquid crystal (LC) E8 were prepared by solution casting in chloroform. The electro‐optical performance characteristics were studied for a wide range of PMMA/E8 compositions (10–80 wt % E8). At two specific levels of LC (70 and…
We were able to stabilize cobalt nanoparticles dispersible in water by optimizing the synthetic procedure using small polar thiol containing compounds as the capping agents. The nanoparticles were found to be spherical. The optical properties of the cobalt nanoparticles were investigated by monitoring the changes in t…