Materials Literature
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The magnetic and electrical transport properties of Mn-doped amorphous silicon (\textit{a-}Mn$_{x}$Si$_{1-x}$) thin films have been measured. The magnetic susceptibility obeys the Curie-Weiss law for a wide range of $x$ (0.005-0.175) and the saturation moment is small. While all Mn atoms contribute to the electrical t…
Nanocrystalline Al-doped nickel ferrite powders have been synthesized by sol-gel auto-ignition method and the effect of non-magnetic aluminum content on the structural and magnetic properties has been studied. The X-ray diffraction (XRD) revealed that the powders obtained are single phase with inverse spinel structure…
The density of trap states in the bandgap of semiconducting organic single crystals has been measured quantitatively and with high energy resolution by means of the experimental method of temperature-dependent space-charge-limited-current spectroscopy (TD-SCLC). This spectroscopy has been applied to study bulk rubrene…
We are commenting on an earlier hypothesis of polaron states bound to F centers in alkali halides. These states increasing the effective size of the color centers, they play an active role in concentration-dependent phenomena, such as the observed quenching of F center luminescence. Our record shows only one related s…
Abstract The intrinsic photoluminescence properties of hyperbranched polyethylenimines (PEIs) and their linear counterpart (LPEIs) have been studied in absence of any classical fluorescent probes. The comparison of the inherent fluorescence emission between hyperbranched polyethylenimines and their linear analogues de…
We studied the hydrolysis kinetics of amorphous polylactide. It was found the hydrolysis rate had a slow-to-fast transition at a certain molecular weight (Mn). This transition was not correlated with the mass loss and water uptake of samples, nor the pH values of testing media. We speculated that this transition was d…
The biodistribution of pristine single-walled carbon nanotubes (SWNTs) in mice was determined by using the skeleton 13 C-enriched SWNTs and isotope ratio mass spectroscopy. The results suggested that the SWNTs were distributed in the entire body, with major accumulations in the liver, lungs, and spleen over an extende…
We investigate, both theoretically and experimentally, a left-handed metamaterial design composed of pairs of short slabs connected with continuous wires, operating in microwave frequency regime. The design was found to give left-handed behavior for a wide range of structure parameters, maintaining high impedance matc…
Melt blending of polylactide (PLA) and a biodegradable poly(ether)urethane (PU) elastomer has been performed in an effort to toughen the polylactide without compromising its biodegradability and biocompatibility. The miscibility, phase morphology, mechanical properties, and toughening mechanism of the blend were inves…
Localized surface plasmon resonances (LSPR) in lithographically fabricated gold (Au) nanodisc pairs are investigated using microabsorption spectroscopy and electrodynamic simulations. In agreement with previous work, we find that the fractional plasmon wavelength shift for polarization along the interparticle axis dec…
Metal corrosion is microbially induced (MIC) and/or electrochemical (ECC) in origin. Here we provide a novel approach to distinguish MIC from ECC, using iron isotope fingerprinting technique . In laboratory experiments, MIC products of Fe in the presence of a pure strain of Thiomonas sp. WJ68 exhibit a major shift in…
A continuum-mechanics approach has been applied to model the mechanical properties of high density polyethylene (HDPE) filled with differently coated SiO2 nanoparticles. The tensile yield stress has been predicted with a finite-element model (FE-model) taking into account the microstructural features, for example, mat…
This paper presents Finite Difference Time Domain (FDTD) method based on discretised Maxwell curl equations and widely used in microwave circuit design - as a promising tool for new optical metrology purposes. We focus on periodic FDTD formulations for scattering problems. The interest in efficient full-wave modelling…
Abstract Based on XRD and optimized structures of the cage compound [(V 2 O 3 ) 2 (PhPO 3 ) 4 ⊂F] – n in singlet ( n = 1) and doublet ( n = 2) states DFT calculations were carried out to determine the energies and spin density distribution for the symmetries D 2 d , C 2 v , and C s . It turned out, that the cage with…
In the present work, compression molded polyurethane/bentonite composites were manufactured and their water sorption characteristics were determined as a function of filler content and drying conditions. The matrix was a polyurethane derived from castor oil and the filler was a commercially available sodium bentonite.…
The infrared reflectivity spectra of semiconducting BaPb(x)Bi(1-x)O(3) single crystals are measured. From the oscillator strength of the bismuth charge-disproportionation mode we compute the compositional dependence of the Born and Szigeti effective-charge difference between two inequivalent bismuth sites. The Szigeti…
We investigated the potential, applicability, and advantages of DUV scatterometry including DUV ellipsometry for the dimensional characterisation of the absorber structures on EUV photomasks. By means of numerical investigations on the basis of rigorous diffraction calculations we demonstrate the sensitivity of DUV sc…
Abstract Using the local spin‐density approximation (LSDA) and the (non self‐consistent) GWapproach, the (quasiparticle) band structure is calculated forMnTe in zinc‐blende geometry. Different parameters characterizing the electronic structure are computed for an antiferromagnetic and the ferromagnetic phase and compa…
The preferred oriented texture Ge2Sb2Te5 (GST) thin film was prepared on SiO2∕Si(001) and TiN(60nm)∕Si(001) substrates. With the modulated layers of each constituent materials, the stoichiometry of thin film was controlled. Through cross section transmission electron microscope analysis and the x-ray diffraction (XRD)…
The rigorous integral equation method (viz MIM) in which the border structure is represented by a multilayer 1-D grating working at small wavelength-to-period ratios is used for taking into account electromagnetic scattering from different-types of nano-irregularities, such as periodical, random, self-organized, and t…