Materials Literature
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Kohlenstoffnanoröhren: Das mittels Säurebehandlung abgeschnittene Endstück einer Kohlenstoffnanoröhre (CNT) trägt hydrophile Sauerstoffgruppen, um die sich Wassermoleküle organisieren, die den Eingang der CNT blockieren. Wasserstoff in Drücken bis zu 10 000 bar kann mithilfe dieses Wasser-Ventils in der CNT eingeschlo…
In recent years, nano/micro wires have attracted considerable attention because of their extraordinary physical properties and enormous potential for applications in numerous fields of research and technology. Among the methods widely used to create nanowires, electrochemical deposition in the pores of ion-track polym…
We found inverse-hexagonal packing pattern from self-assembled anodic aluminum oxide and exploited the pattern to obtain triangular pore array. By replicating the curved interface between aluminum and porous alumina, we fabricated a pattern with the opposite packing structure as well as the inversed pattern curvature.…
Methane is activated at moderate temperature on polyoxometalates, leading to the evolution of hydrogen and the formation of a methoxy species which has been characterized by solid-state C13 CP-MAS NMR. In the case of a molybdic polyoxometalate, the methyl group is linked to an edge-shared oxygen atom of the polyoxomet…
It was observed that the trapped magnetic moment of HTS tablets or annuli increases in time (negative relaxation) if they are not completely magnetized by a pulsed magnetic field. It is shown, in the framework of the Bean critical-state model, that the radial temperature gradient appearing in tablets or annuli during…
Compared to classical solids, the quantum solid helium-4 can undergo a giant plastic deformation that is also reversible.
This work presents a study of the OSL residual signal of Al2O3:C pellets after different annealing/bleaching treatments. It is shown that this luminescent material has deep trapping centers which are not associated with the TL main peaks and they are not completely emptied with an annealing up to 800°C . This fact was…
Purpose: To study surface technetium labeling of stealth DTPA-Liposomeand to evaluate its potential as a molecular imaging tracer for both normal and melanoma-bearing mice. The radiolabeling yield of liposomes was greater than 90%and showed good chemical and biological stability. Biodistribution studies in normal mice…
New biodegradable polyphosphazenes containing lactic acid ester side groups were synthesized via a route of macromolecular substitution. Their biodegradability and biocompatibility were studied in vitro. The polymers showed the fastest hydrolysis in the basic solution, followed by the acidic and then the neutral solut…
Co80Pd20 melts have been undercooled below Curie temperature of the liquids (TCL) by employing the method of molten glass denucleation combined with cyclic superheating. The largest undercooling achieved is 465 K, which indicates that the nucleation temperature is below TCL more than 100 K and then the ferromagnetic l…
The wetting behavior of solid surfaces by a liquid is a very important aspect of surface chemistry and surface geometrical structure. In the present study, polystyrene-silica (PS-SiO2) nanocomposite coatings with varying degrees of wettability are prepared by a simple and cheap spraying process without the use of soph…
An experimental characterization technique for determining the electromagnetic properties of metamaterials in the microwave frequency band is presented. The method consists in measuring the S-parameters of an asymmetrical stripline partially filled with the sample to be characterized. For retrieving the characteristic…
Abstract We report the results of a Seebeck effect study carried out on the single crystals of Eu1 − xCaxB6 (0 ≤ x ≤ 1) at temperatures 1.8–300 K. The Seebeck coefficient is shown to be determined by the sum of the linear term S = AT and a phonon‐drag contribution, which is induced by the local phonon mode of europium…
We have synthesized$\hbox{MgB}_{2}$bulks from a laboratory-made$\hbox{MgB}_{4}$precursor that have higher packing factor (relative density) compared to conventional in situ$\hbox{MgB}_{2}$bulks from boron.$\hbox{MgB}_{4}$precursor with less MgO content can be obtained by decomposition of$\hbox{MgB}_{2}$under low magne…
Pyramidal NiO nanostructures have been prepared via a solid-state thermal decomposition reaction. In the synthesis of NiO nanostructures, a [Ni(phen)2]2+ complex was employed as a novel precursor in solid-state thermal decomposition process at air at 500°C. The products were characterized by elementary analysis, Fouri…
By moving the alkoxy group on the spacer from position 5 to position 4 to add another protocol for the algorithm for intermolecular and intramolecular hydrogen bonding interactions, highly regioselectivity of noncovalent synthesis of the hydrazide-based cyclic hexamers was achieved: one out of thirteen possible isomer…
Abstract The In-Situ internal coating is a viable alternative for pipeline rehabilitation of corrode pipe and cost effective compared to replacement with new pipelines. The coating effectively controls internal pipeline corrosion through the application of multiple high build liquid epoxy coating that coats the entire…
The reactions of O((1)D) atoms with VF(5) at room temperature have been studied by time-resolved laser magnetic resonance at the buffer gas (SF(6)) pressure of 6 Torr. The O((1)D) atoms were produced by the photodissociation of ozone using an excimer laser (KrF, 248 nm). By monitoring the kinetics of FO radical format…
Natural rubber was reinforced with stearic acid-modified soy protein particles prepared using a microfluidizing and ball milling process. Longer ball milling time tends to increase the tensile strength of the rubber composites. Elastic modulus of the composites increased with the increasing filler concentration. The l…
To address the limitations of existing silicon solid-state photomultipliers (SSPMs), we are developing new photodetector elements in Al0.8Ga0.2As . With 80% aluminum concentration in the GaAs compound, the material effectively becomes a wide band-gap semiconductor with a band-gap energy of ~2.1 eV. The wide band-gap c…