Materials Literature
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Zinc hexacyanometallates Zn 3 A 2 [M(CN) 6 ] 2 with different exchangeable alkaline cations A + and framework transition metals M constitute an excellent model system to study H 2 adsorption in nanoporous solids. A lattice gas approach, based on experimental data and simple considerations on the position and energies…
Thin films with low-refractive index are of great interest to adjust the optical properties of optical components, e.g. reflectivity. In this respect, sol-gel coatings are very efficient for flat glass functionalisation because of ease of application, low cost and versatility. Mesoporous silica films prepared by surfa…
The quadrupolar hyperfine interactions of in-diffused (111)In --> (111)Cd probes in polycrystalline isostructural Zr(4)Al(3) and Hf(4)Al(3) samples containing small admixtures of the phases (Zr/Hf)(3)Al(2) were investigated. A strong preference of (111)In solutes for the contaminant (Zr/Hf)(3)Al(2) minority phases was…
The interplay of magnetic and superconducting fluctuations in two-dimensional systems with van Hove singularities in the electronic spectrum is considered within the functional renormalization-group (fRG) approach. While the fRG flow has to be stopped at a certain minimal temperature ${T}_{\text{RG}}^{\text{min}}$, we…
Nanoparticles (NPs) are widely used in several manufactured products. The small size of nanoparticles facilitates their uptake into cells as well as transcytosis across epithelial cells into blood and lymph circulation to reach different sites, such as the central nervous system. Studies have shown different risks of…
Abstract The performability metric is commonly used in Networks‐on‐Chip (NoC)‐based systems to represent their abilities to successfully complete specific tasks in finite time intervals. In this paper, we present a novel topology‐based performability model for NoC‐based systems. The model is used to evaluate the perfo…
This work deals with the replacement of the reflection layer stacks by sub-wavelength structures, which form the cavity of Fabry-Perot-Interferometer (FPI) infrared filters. Periodically arranged metal ring resonators are investigated regarding reflectivity and sensitivity with respect to polarization angle by Finite…
We explore here the use of field evaporation in a transmission electron microscope for controlled apex modification, opening, and shortening of various types of individual nanotubes and nanowires. The technique works well for conducting carbon nanotubes but also for large bandgap silicon carbide nanowires and insulati…
Test objects for calibration of scanning electron microscopes (SEMs) and atomic force microscopes (AFMs) operating in the nanometer range are analyzed. All the test objects can be divided into three groups: (a) structures with right-angled profiles; (b,c) structures with trapezoidal profiles and small/large angles of…
We discuss Casimir phenomena which are dominated by long-range fluctuations. A prime example is given by "geothermal" Casimir phenomena where thermal fluctuations in open Casimir geometries can induce significantly enhanced thermal corrections. We illustrate the underlying mechanism with the aid of the inclined-plates…
The protein streptavidin exhibits unique properties advantageous for "bottom-up" nanofabrication applications. It self-assembles into various 2-D crystalline lattices onto which nanoparticles can be attached through both electrostatic and ligand-receptor mechanisms. We examine the electrostatic adsorption of gold nano…
We report a method for fast identification of trace substances. It is based on the single-photon detection of characteristic Raman scatterings by using a gated dual-wavelength coincidence technique and multipixel photon counters. The objective of this study is to overcome the drawback of the low-speed detection of tra…
Holographic surface relief gratings written in azobenzene containing films were studied for the use as masters for polymeric thin film distributed feedback (DFB) lasers. Light induced mass transport driven by E-Z isomerization in azobenzene containing materials have shown to be attractive for all optical and one-step…
The presence of diazotrophic cyanobacterium Richelia intracellularis Schmidt as an endosymbiont of Rhizosolenia hebetata was observed in the phytoplankton samples collected from the Northern Arabian Sea during the fag end of winter monsoon (February- March). R. hebetata formed 80 % Rhizosolenia population and 60 % of…
The development of effective methods for the fabrication of ZnO nanostructures is important for the use of this semiconductor material with interesting optical and electronic properties. Chemical solution deposition methods have been demonstrated for creating ZnO films and electron beam exposure of a precursor film, z…
The dependence of the magnetization profile of Co/Pd multilayer films with very thin individual layers, Co(0.4 nm)/Pd(0.6 nm), on the energy of ion milling is investigated using scanning electron microscopy with polarization analysis (SEMPA). The effect of Ar ion milling on the Co/Pd magnetization angle distribution i…
Borate glasses and borate glass ceramics are good candidates as a matrix material for fluorescent ions like samarium. The chosen network modifier influences the fluorescence efficiency of the incorporated rare earth ion. Sm3+-doped lithium, sodium, barium and lead borate glasses were examined with respect to their flu…
Abstract Multiwalled carbon nanotubes (MWCNTs), because of their unique morphology and physico‐chemical properties, have many potential advantages in nanotechnology, electronics, optics and other fields of material science. Their use is limited by their sensibility to oxidation, especially at high temperatures. The ch…
Abstract A new monomer, 1,5‐bis(p‐dimethylaminophenylimino)naphthalene, was prepared through Schiff‐base condensation reaction of 1,5‐diaminonaphthalene and 4‐(dimethylamino)benzaldehyde in the presence of ethanol. A series of aromatic polyimides bearing naphthalene and CHN groups were synthesized from the diamine…
Metal sulfide nanoparticles have attracted considerable interest because of their unique semiconducting and electronic properties. In order to prepare these fascinating materials at an industrial scale, however, solvent-free, dry processes would be most advantageous. In the present work, we demonstrate how traditional…