Materials Literature
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100-oriented epitaxial Pb(Zr,Ti)O 3 [PZT] films with various Zr/(Zr+Ti) ratios from 0 to 0.8 were grown on (100) c SrRuO 3 ∥(100) SrTiO 3 and (100) c SrRuO 3 ∥(100) LaNiO 3 ∥(001) CaF 2 substrates. 200-nm-thick films grown on CaF 2 substrates consisted of a pure tetragonal phase up to the Zr/(Zr+Ti) ratio of 0.8. On t…
Electron structure investigations of smooth hydrocarbon thick films with a high atomic D/C ratio, redeposited from deuterium plasma discharge onto the vacuum vessel regions of the T-10 tokamak, are continued. For the first time, the investigations of both film sides and in a valence band region were performed by X-ray…
A numerical study of the electromagnetic properties of a liquid crystal-tunable metamaterial absorber (LCTMA) is presented. This artificial structure is characterized by an efficient absorption of terahertz electromagnetic radiation in a narrow frequency range. The selective absorption in the metamaterial is tuned by…
The structure of a titanium iodide single crystal obtained by zone melting has been studied by metallography, X-ray diffraction, and electron microscopy. It has been shown that the initial bcc titanium single crystal becomes a pseudosingle crystal upon cooling below the temperature of the β → α polymorphic transition.…
The austenitic stainless steels are used in nuclear spent fuel reprocessing and waste management plants and the process fluid is nitric acid at temperature up to boiling point. However incorporation of oxidizing ions e.g. fission products as well as corrosion products, in nitric acid stream make the environment highly…
While aluminum-based metallization schemes on Si and corresponding top-side connections via Al-bonds have been optimized for the last decades and are well understood today, only few investigations have been done on the interaction of thick Cu wire-bonds and copper-metallizations on SiC. In this work the mechanical as…
We report on a study of target-thickness effects on the degree of the linear polarization as well as on the emission probability of bremsstrahlung arising in the collision of 100 keV electrons with thin gold targets. For this purpose an experiment at the electron source SPIN at the TU Darmstadt as well as Monte Carlo…
A simple method is developed for the synthesis of carbon nanotubes (CNTs) using Mo-Co/MgO catalyst by a thermal chemical vapor deposition (CVD) technique. Acetylene was used as the source of carbon and nitrogen as carrier gas. A series of MgO supported Mo-Co catalysts were prepared by the combustion route using urea a…
To obtain lead-free 0.5Ba (Zr 0.2 Ti 0.8 )O 3 -0.5(Ba 0.7 Ca 0.3 )TiO 3 ceramics with excellent microstructure and electrical properties, BZT-BCT ceramics doping Mn 4+ and Nb 5+ was synthesized follow a conventional solid state reaction route. By means of SEM, XRD, quasi-static d 33 meter, the influence of sintering t…
The grain-boundary and its electrical characteristics in SrCoO 3 doped ZnO varistors were studied. The grain-boundary around ZnO-grain is probably composed of SrCoO 3 , and its electrical behavior is clearly different from two conventional types of Bi-and Pr-based ZnO varitors. The non-linearity and characteristic beh…
An oxide diluted magnetic semiconductor, Co doped ZnO thin film was successfully fabricated by cathodic electrodeposition method. X-ray diffraction studies demonstrate that the ZnCoO thin film indicates that the wurtzite structure. X-ray photospectroscopy studies suggested Co ions have a chemical valence of 2+. Optica…
Objective(s): This paper describes a selective and sensitive biosensor based on the dissolution and aggregation of aptamer wrapped single-walled carbon nanotubes. We report on the direct detection of aptamer–cocaine interactions, namely between a DNA aptamer and cocaine molecules based on near-infrared absorption at …
The methanol extracts of Terminalia chebula fruits as antibacterial agent and citric acid as a crosslinking agent have been applied on cotton plain woven fabric and the treated fabrics are then tested for antibacterial activity against bacterial strains like Staphylococcus aureus and Escherichia coli, under agar diffu…
The effect of explosive pressing on a powder of Forum ultrafine polytetrafluoroethylene (UPTFE) is studied. It is found that the processing leads to the formation of a crust on the surface of the sample; its morphology and phase and chemical composition differ from those of the original sample. Regions of flattened pa…
This work aims to investigate the hydration behavior and structural properties of two dioctahedral smectites with contrasting location charge (beidellite SbId-1 and montmorillonite SWy-2) according to the nature of the bivalent compensator heavy metal cations (i.e. Hg (II), Ni (II), Ba (II) and Mg (II)). This study is…
Dealing with increasing power densities in high performance micro- and power -electronics applications is continuously becoming more challenging. Many applications today need thermal interface materials (TIMs) that can offer significantly higher performance than what is currently available. One of the main challenges…
An algorithm and a computer program that can be used in the search for all possible periodic packings of a specified set of polyominoes with a specified packing factor have been developed. The algorithm is based on the method of discrete modeling of molecular packings.
We investigated how poly(vinylpyrrolidone) (PVP) suppresses crack generation during fabrication. It was confirmed that PVP plays the role of a stress-relaxing agent by in situ stress development measurement at temperatures from 200 to 300 °C. We found that PVP in the film was removed in two steps and that the residual…
Dynamic crystallization (DC) is a new characterization technique for measuring the chemical composition distribution (CCD) of semicrystalline copolymers. This technique fractionates polymers based on chain crystallizabilities under a constant cooling rate; a solvent is also fed through the column at a constant flow ra…
In order to investigate the hydrogenation of intermetallic compounds, a gas pressure cell for in situ neutron powder diffraction based on a sapphire crystal tube was constructed. By proper orientation of the single crystal Bragg peaks of the container material can be avoided, resulting in a very low diffraction backgr…