Materials Literature
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When a new technology is integrated into industry commodity products and consumer electronic devices, and sold worldwide in retail stores, it is usually understood that this technology has then entered the realm of mainstream technology and therefore mainstream industry. Such a leap however does not come cheap, as it…
Magnetic Resonance Imaging (MRI) can characterize and discriminate among tissues using their diverse physical and biochemical properties. Unfortunately, submicrometer screening of biological specimens is presently not possible, mainly due to lack of detection sensitivity. Here we analyze the use of a nitrogen-vacancy…
In this work, we firstly investigated controlling the lattice parameter of IIIoxides used as substrates for III-nitrides heterostructures. It was shown that the atomic content change in III-sublattice gives large possibilities for precise cation controlling the lattice parameters. The developed technique is promising…
This paper presents latest own results in the development of reversible photochromic and irreversible photofluorescent polymer systems providing fabrication of multilayer recording media for 3D optical memory with super high information capacity. It was shown that synthesized thermal irreversible photochromic diarylet…
Different earth-observation and scientific space missions have the need for special spectrometer gratings. As satellite instruments typically operate close to the technologically accessible limits also the realization of the respective gratings is extremely demanding. Critical parameters are the diffraction efficiency…
Transparent glass-ceramics containing nano-crystals were prepared by controlled heat-treatment of conventionally melt-quenched NaF-YF<sub>3</sub>-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> oxyfluoride glass. The precipitated crystallites were composed of only cubic NaYF<sub>4</sub> and the average diameter was estima…
Die Funktionalisierung von Quantenpunkten (QDs) gelang, wenn die Oberflächendichte an funktionellen Gruppen durch elektrostatische Abstoßung eingestellt wurde. Solche QDs konjugierten in vitro und in lebenden Zellen durch Selbstorganisation mit His-markierten Proteinen und konnten dann ohne weitere Fraktionierung zur…
New ultra-thin optical designs are presented that comprise discontinuous optical sections (called channels) working in parallel (multichanneling) to provide the desired optical function. Aplanatic (a particular case of SMS-design) multichannel designs are also shown and used to explain more easily the design procedure…
Teströhrchen: Nanoröhren mit großem Durchmesser wurden durch direkte Selbstorganisation von cyclodextrinbasierten Wirt-Gast-Superamphiphilen erhalten (siehe Bild). Durch Modifikation der verwendeten Cyclodextrin-Komponenten konnten auf der Oberfläche der Nanoröhren die wesentlichen katalytischen Komponenten der Glutat…
SKS active carbon, prepared by dehydrogenation of the polystyrene–divinylbenzene copolymer, as a model sample of highly amorphous carbons, has been examined by scanning electron microscopy, transmission electron microscopy, and energy dispersive X-ray methods, indicating a nanostructural nonperiodic character of the r…
One of the ways in which the cell efficiency of solar cells may be improved by better exploitation of the solar spectrum makes use of the down-conversion mechanism, where one high energy photon is cut into two low energy photons. When energy transfer between rare earth ions is used to activate this process, high emiss…
We report on optical-absorption study of ${\text{Zn}}_{1\ensuremath{-}x}{\text{Mn}}_{x}\text{O}$ $(x=0--0.06)$ films on fused silica substrates taking special attention to the spectral range of the fundamental absorption edge (3.1--4 eV). Well-pronounced excitonic lines observed in the region 3.40--3.45 eV were found…
Cross on UV light: A polymer bearing dithiocarbamate ester groups, linked to the polymer backbone through the dithiocarbamate nitrogen atom is capable of reversible cross-linking and de-linking through photochemical rearrangement of the pendant groups (see scheme).
The derivation for the transport coefficients of an electron system in the presence of temperature gradient and the electric and magnetic fields are presented. The Nernst conductivity and the transverse thermoelectric power of the Dirac fermions in graphene under charged impurity scatterings and weak magnetic field ar…
An effective light trapping system is required in silicon solar cells in order to collect a large amount of photons. That is why we focus our investigation on the fabrication and evaluation of two types of optical systems introduced on the back side of solar cells. The aim of these structures is to enhance the light t…
In this paper, molecular dynamics simulations are employed to study the liquid-crystal phases of 2-(4-butyloxyphenyl)-5-octyloxypyrimidine and 5-(4-butyloxyphenyl)-2-octyloxypyrimidine. Both mesogens consist of aromatic phenyl-pyrimidine cores in between two identical alkoxy tails, but they differ in the preferred cor…
The pathogenic bacteria Pseudomonas aeruginosa and Bordetella pertussis contain in their outer membranes the rare sugar 2,3-diacetamido-2,3-dideoxy-d-mannuronic acid. Five enzymes are required for the biosynthesis of this sugar starting from UDP-N-acetylglucosamine. One of these, referred to as WlbB, is an N-acetyltra…
Surface does matter: Lewis acidic Al and Lewis basic O atoms of γ-Al2O3 interact through multiple strong interactions with adsorbed methyltrioxorhenium. The major species, which coordinates through oxo ligands, readily adopts an octahedral geometry, whereas the minor μ2-CH2 species prefers a lesser degree of coordinat…
Abstract Grafting of ethylene glycol methacrylate phosphate (EGMP) monomer polymerized from alumina nanoparticles has been performed in order to confer a better thermal stability and fire retardancy to PMMA and PS nanocomposites. Grafting and polymerization processes have been investigated using FTIR, TGA, and element…
We present systematic investigations of the electronic and magnetic properties of the graphene/Ni(111) system by means of x-ray absorption spectroscopy (XAS) and magnetic circular dichroism (XMCD) at the Ni L2,3 and C K absorption edges. The XAS C 1s→π∗,σ∗ spectra show dramatic changes as the angle, α, between the ele…