Materials Literature
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Certain proteolytic enzymes are capable of mediating the processing of tri- and tetra-alkoxysilanes to form monolithic silica via the sol-gel process, or silsesquioxane sol-gels under green, solvent-free conditions.
We report on the structural and magnetic properties of a cobalt-implanted ZnO film grown on a sapphire substrate. X-ray diffraction and transmission electron microscopy reveal the presence of a ( )-oriented hexagonal Co phase in the Al2O3 sapphire substrate, but not in the ZnO film. Co clusters, with a diameter of abo…
Single-walled carbon nanotubes (SWCNTs) have been successfully solubilized using water-soluble p-phosphonated calix[n]arenes (n = 4, 6, 8) and ‘extended arm’ upper rim functionalized (benzyl, phenyl) p-sulfonated calix[8]arenes. Selective SWCNT diameter solubilization has been demonstrated and subsequent preferential…
Gas insulated switchgears (GISs) with SF6gas with superior insulation and interruption performances used as an insulating medium have realized significant downsizing of substation facilities. GISs have been in use in substation facilities for more than 30 years and are expected to be used for an even longer period of…
In this study, high-quality ZnO thin films were grown on sapphire substrates by atomic layer deposition (ALD), followed by high-temperature postdeposition annealing. A thin Al2O3layer was subsequently deposited by ALD on the ZnO surface to reduce detrimental surface states. Photoluminescence measurements conducted in…
Abstract The physisorption of air in single‐walled carbon nanotubes (SWNTs) is studied employing molecular dynamics. The effect of the nanotube diameter in the gas adsorption capacity of SWNT bundles has been investigated using (10,0), (15,0), and (20,0) SWNTs finding an increasing load capacity. The O 2 :N 2 ratio in…
The tridentate [NNO](-) Schiff-base ligand supports the carbonate-templated synthesis of a cluster with ten manganese(ii) ions arranged in two parallel [MnO](5) rings.
Within the scope of a hybrid power plant project a micro gas turbine test rig was developed and is actually under construction at the DLR Institute of Combustion Technology. The test rig consists of a Turbec T100PH micro gas turbine and the required piping system for the hybrid application. Instead of a real solid oxi…
Superhydrophobic surfaces based on poly(methyl methacrylate) (PMMA) with flower-like structures were prepared by controlling the aminolysis reaction of surface ester groups and the surface morphology of PMMA. The effects of the aminolysis time and the processing temperature in stearic acid solution on the surface wett…
The interaction of trivalent lanthanide chlorides and chrysin in methanol results in formation of the complexes [Ln(chrysin) 3 ], where Ln = La, Pr, Nd, Sm, Gd, Tb and Ho. The complexes have been characterized by elemental analyses, molar conductance, IR, UV–Vis, TGA/DTA and NMR spectroscopic studies. They behave as n…
Water-dispersible and magneto-responsive carbon nano test tubes with a controlled length (1.3 microm) and diameter (35 nm) were synthesized by using the nanochannels of anodic aluminium oxide as a template.
We used a combination of two methods to explore the elastic property of clays: Molecular simulation on montmorillonite, as a function of water content in the interlayer and stress; and Nanoindentation measurements on various reference clays, where mechanical properties are determined from the strain response due to lo…
A simple testing method for mechanical properties of materials in high-pressure hydrogen environments has been developed. This method does not require any high-pressure vessel but the high-pressure hydrogen environment is produced inside the hole in the specimen. The specimen temperature is easily controlled by outsid…
Dendrimer molecules have great potential in different applied fields because of their peculiar conformational properties. Many insights pertinent to the understanding of these properties can be provided by numerical simulation methods. Detailed models, based on atomistic representations of the molecular structures are…
The goal of the work was to characterize and synthesize tellurite glasses from the TeO2–WO3– –PbO–La2O3 system. The effect of lanthanum oxide content on the tendency to the crystallization of glassy matrix was investigated. Differential thermal analysis DTA/DSC, XRD measurement were considered in terms of the lanthanu…
Nonlocal elasticity is employed to evaluate the length-dependent in-plane stiffness of achiral and chiral single-walled carbon nanotubes. The length-dependent stiffness is revealed from the nonlocal elasticity and verified through molecular simulation results. The value of the scale coefficient in the nonlocal theory…
This study was designed to quantitatively assess the effects of short fiber (< 12.7 mm long) in raw cotton on the quality of 20s ring spun yarn. Twenty-eight bales of cotton with a wide range of fiber properties and an especially diverse population of short fiber content were utilized. Properties of the raw cotton wer…
The interaction of phenol derivatives with the self-assembled fibrillar network of two different supramolecular gels has been studied. NMR relaxometry reveals the selective interaction of resorcinol over other related molecules with a gel formed by the gelator 2 which contains terminal pyridine units. No selectivity i…
Twelve fungi were screened for the potential of their extracellular enzymes to increase the hydrophilicity of polyamide (PA) materials. The most pronounced increase in hydrophilicity was found for enzymes from Beauveria brongniartii and B. bassiana. The 55 kDa polyamidase from B. brongniartii was purified using ultraf…
The orientation relationships between the compression twins and their matrices in magnesium were investigated using EBSD technique. Schmid factor analyses were applied to determine the orientation dependency of compression twins and the condition for double twinning. Results show that thin compression twin bands of {1…