Materials Literature
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Helices nach Bedarf: Collagenpeptide, die umgebungsgesteuert Dreifachhelices bilden, wurden gezielt entworfen. Der Austausch der Hydroxyprolin(Hyp)-Reste in einem Collagenpeptid durch carboxylatmodifizierte Hyp-Reste führte zu einem Peptid, das im sauren pH-Bereich bei niedrigen Temperaturen eine dreifachhelicale Coll…
Abstract Addition of arginine, tryptophan and lysine to poly( L ‐lactide) (PLLA) has resulted in a new series of enhanced degradation biomaterials. Degradation was performed at 70°C and degradation behavior was studied using water uptake, mass loss, pH value change, scanning electron microscopy (SEM), differential sca…
The gas phase reaction of molecular oxygen and hydrogen catalyzed by a Au(3) cluster to yield H(2)O(2) was investigated theoretically using second order Z-averaged perturbation theory, with the final energies obtained with the fully size extensive completely renormalized CR-CC(2,3) coupled cluster theory. The proposed…
Abstract The structural requirements for the preparation of polyether polyol/Na + ‐montmorillonite nanocomposites, which are used in polyurethane/NaMMT nanocomposites, were evaluated using X‐ray diffraction, thermogravimetric analysis and shear viscosity behavior. Nanocomposites based on homopolyetherols: poly(ethylen…
In this article, a family of damage models which leads to the analytical solvability of the nonlocal evolution problem of a homogeneous bar in tension is defined. Explicit gradient damage models and implicit gradient damage models are investigated in a simple structural framework. The natural boundary conditions are d…
The present paper is devoted to the description of a procedure for the design of rotational hysteresis couplers for customer applications. The analysis has been oriented towards configurations characterized by high reliability and adaptability to the operating conditions. The tradeoff analysis leads to a claw pole con…
Discovery of carbon nanotubes has great impact on the development of newer methodologies and devices useful for the analysis of various types of chemicals. The functionalisation of CNTs with biomolecules related to chemical and biological warfare agents makes these useful for the detection of these agents. The detecti…
Peroxoniobatspezies werden beobachtet, wenn Nioboxide als Photokatalysatoren oder zur Bindung von Radionukliden eingesetzt werden. Die Reaktionen von [Nb6O19]8− und [Nb10O28]6− mit Wasserstoffperoxid unterscheiden sich, und [N(CH3)4]5[H3Nb6O13(O(I)2)6]⋅9.5 H2O wurde als erste Peroxopolyoxoniobat-Spezies strukturanalyt…
The gelation and crystallization processes in solutions of syndiotactic polystyrene in toluene and toluene + carbon dioxide fluid mixtures were studied in a variable-volume view-cell system over a pressure range from 7 to 50 MPa for polymer concentrations up to 25 wt % and for CO 2 concentrations up to 43 wt %. All th…
Many biominerals, including mollusk and echinoderm shells, avian eggshells, modern and fossil bacterial sediments, planktonic coccolithophores, and foraminifera, contain carbonates in the form of biogenic aragonite or calcite. Here we analyze biogenic and geologic aragonite using different kinds of surface- and bulk-s…
In situ electron spin resonance (ESR) studies have been performed on composite films consisting of a ruthenium tris(bipyridyl) complex and an inherently conducting polymer, poly(2-methoxyaniline-5-sulfonic acid) (PMAS). The composites were investigated under white light irradiation and potential control conditions to…
A liquid crystalline phase has been discovered in a polyolefin of poly(methylene-1,3-cyclopentane) (PMCP) having low molecular weight, which was obtained with cyclization polymerization of 1,5-hexadiene (HD) using a zirconocene catalyst in the presence of chain transfer reagents. PMCP clearly shows fluidity and birefr…
This manuscript describes the synthesis of a new generation of multicomponent disklike nanoparticles. In this work, we present for the first time, through the template-based sequential electrochemical deposition of metal/semiconductor/polymer segments, an innovative and effective method for preparing a wide range of m…
Carbon nanotubes (CNTs) have shown extraordinary mechanical, thermal, electrical, and electronic properties. Electronic properties of CNT are very sensitive to its diameter and chirality, making it metallicor semiconducting, depending upon its chiral vector. The extraordinary properties of CNTs have led to demonstrati…
Abstract Laser pyrolysis has been used to synthesize WO 3 nanostructures. Spherical nano-particles were obtained when acetylene was used to carry the precursor droplet, whereas thin films were obtained at high flow-rates of oxygen carrier gas. In both environments WO 3 nano-wires appear only after thermal annealing of…
Currently, there is substantial activity of research in the development of the new sources in the terahertz (1 THz = 1 × 10 12 Hz) region of the electromagnetic spectrum. Coherent tunable terahertz waves have great potential for frequency domain spectroscopy and THz imaging applications. We report for the first time t…
We have measured the relative single and double photoionization cross section of magnesium from $22\phantom{\rule{0.3em}{0ex}}\text{to}\phantom{\rule{0.3em}{0ex}}54\phantom{\rule{0.3em}{0ex}}\mathrm{eV}$ photon energy using monochromatized synchrotron radiation. The corresponding double-to-single ionization ratio as w…
Abstract In this article, the foaming processes of polyimide foams and its reinforced foams were observed by a self‐made visualization device at different heating rates ranging from 10°C/min to 120°C/min. Contributing factors such as chemical structure of polyimide, fillers, and heating rate were investigated to deter…
We have studied photoluminescence (PL) spectrum and dynamics of the inner nanotubes in double-walled carbon nanotubes (DWNTs) and compared PL properties between DWNTs and single-walled carbon nanotubes (SWNTs). The PL peak energies of the inner tubes are redshifted from those of SWNTs with the same chiral indices. Thi…
Helices on demand: Collagen peptides were engineered to form triple helices under environmental control. The replacement of the hydroxyproline (Hyp) residues in a collagen peptide with carboxylate-modified Hyp residues gave a petide that forms a collagen triple-helical structure at acidic pH values and low temperature…