Materials Literature
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Integral 90 wt% carbon-honeycomb lab-scale monoliths prepared from coal are characterized and applied to adsorb o -xylene. Textural characterization shows that the monoliths obtained after activation of the carbon exhibit appropriate porosity for their use as adsorbents. Their total capacity to retain o -xylene proves…
We have demonstrated a simple fabrication of hollow nanoparticles by halide-induced corrosion oxidation with the aid of surfactants. Cuprous oxide Cu2O nanoshells can be generated by simply mixing Cu nanoparticles with alkyltrimethylammonium halides at 55 degrees C for 16 min. The hollowing mechanism proposed is that…
To achieve a better understanding of the nonspecific adsorption process of proteins on solid surfaces, the mechanism of this interaction was investigated by a model system comprising the structurally flexible ("soft") protein goat anti-rabbit immunoglobulin G and a set of chemically defined surfaces. The thermodynamic…
Ba x Sr 1 - x TiO 3 (BST, x = 0.5) thin films were prepared on Pt/TiO 2 /SiO 2 /Si substrates using a diol-based sol−gel method. Two different solvents were employed, ethylene glycol and propylene glycol (1,2-propanediol). The influence of the solvent on the sol structure, microstructure development, and dielectric pr…
Uncontrolled aggregation of proteins or polypeptides can be detrimental for normal cellular processes in healthy organisms. Proteins or polypeptides that form these amyloid deposits differ in their primary sequence but share a common structural motif: the (anti)parallel beta sheet. A well-accepted approach for interfe…
Efficiency measurements of a grazing-incidence diffraction grating in the off-plane mount were performed using polarized synchrotron radiation. The grating had 5000 grooves/mm, an effective blaze angle of 14 degrees, and was gold coated. The efficiencies in the two polarization orientations (TM and TE) were measured i…
Silica-based hybrid materials having covalently immobilized vinyl (SiO 2 −C 2 H 3 ), chloropropyl (SiO 2 −R−Cl), trimethylsilyl (SiO 2 −SiMe 3 ), ethyl sulfonic acid (SiO 2 −R−SO 3 H), and aminopropyl (SiO 2 −R−NH 2 ) groups, as well as the salt of the latter with HNO 3 (SiO 2 −R−NH 2 ·HNO 3 ) were studied by differen…
We report here a synthesis method for single-crystal monodisperse GeO 2 nanocubes in a reverse micelle system. Hydrolysis of germanium tetrachloride (GeCl 4 ) in a micelle system produces GeO 2 nanocubes in the presence of oleylamine and cetyltrimethylammonium (CTAB). The average edge length of the cubes varies from 5…
Highly crystalline Zn1−xCoxO nanorods were prepared using a hydrothermal method. With increasing Co2+ dopant concentration, the lattice volume enlarged considerably, which is associated with the enhanced repulsive interactions of defect dipole moments on the wall surfaces. This lattice modification produced a signific…
Background: In order to quantify effects of ultrasound irradiation parameters under therapeutic condition, especially sonodynamic therapy, it is initially necessary to evaluate inertial cavitation activity in vitro conditions; therefore, in this study, the effect of 1 MHz low level ultrasound based on °OH radicals gen…
The structural aspects of photoinduced phase transitions in spin-crossover compounds were investigated by neutron Laue diffraction. The structures of the ground state and of the metastable LIESST state of the ${\mathrm{Fe}}^{\mathrm{II}}$ spin transition compound $[\mathrm{Fe}(1\text{\ensuremath{-}}n\text{\ensuremath{…
While studies of solidification microstructures have focused mainly on the tips of the dendrites, the last stage solidification is equally important from the point of view of defect formation (porosity, hot tearing), mechanical strength build-up and precipitation of phases. In particular, the transition from continuou…
Here we report a spontaneous combustion reaction in synthesizing Pt hollow capsules. In brief, Pt nanoparticles were loaded on the surface of colloidal carbon spheres by wet-chemical impregnation. When Pt-loaded carbon spheres were taken out of an argon-filled tube furnace at room temperature and exposed to air, they…
This paper presents a derivation of a second-order isotropic continuum from a 2D lattice. The derived continuum is isotropic and dynamically consistent in the sense that it is unconditionally stable and prohibits the infinite speed of energy propagation. The Lagrangian density of the continuum is obtained from the Lag…
We use molecular mechanics calculations to study size effects on mechanical properties of carbon nanotubes. Both single‐walled nanotubes (SWNTs) and multi‐walled nanotubes (MWNTs) are considered. The size‐dependent Young's modulus decreases with the increasing tube diameter for a reactive empirical bond order (REBO) p…
Chiralität aus dem Blut: Die Bildung stabiler Komplexe aus Serumalbuminen und Kupfer(II)-phthalocyaninen führt zu Proteinkonjugaten. Diese Hybridkatalysatoren ermöglichen enantioselektive Diels-Alder-Reaktionen: Beispielsweise werden aus Azachalconen 1 und Cyclopentadien (2) die Produkte 3 mit 85–98 % ee erhalten.
In organic medium, bisprophyrins 1-6 connected by aromatic linkers self-assemble via subtle forces such as van der Waals, pi-pi stacking, and CH/pi to form supramolecular dimers. The structures of bisporphyrin dimer 1.1 were discussed using our chemical shift simulation, revealing that 1.1 mainly adopts the self-compl…
The binuclear silver(I) complex of a Schiff base oligopyrrolic macrocycle was prepared in high yield and fully characterized. UV-visible absorption and 1H NMR spectroscopic analyses reveal that coordination of Ag(I) cations is subject to a strong positive homotropic allosteric effect.
First-principles calculations are used to investigate chemical trends in the structural instability of the high-symmetry cubic structure for a selected set of ferromagnetic Heusler compounds. The role of the valence-electron-to-atom ratio e∕a is investigated both by comparing compounds of different compositions, and b…
Nanosized inverted domain dots in ferroelectric materials have potential application in ultrahigh density rewritable data storage systems. Herein, a data storage system is presented based on scanning non-linear dielectric microscopy and a thin film of ferroelectric single-crystal lithium tantalite. Through domain engi…