Materials Literature
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Light-driven molecular motors may be useful for nanotechnology applications. The possibility of building such a motor based on the tolane framework is explored here. In the ground electronic state of tolane, the barrier to internal rotation is comparable to room temperature thermal energies, k(B)T. The barrier increas…
We report the experimental observations of large spatially disk-shaped patterns in an iron (Fe) film system deposited on silicone oil surfaces by a DC-magnetron sputtering method. These disk patterns form spontaneously during deposition and grow successively in vacuum condition after deposition. Their nucleation, grow…
Abstract We have developed new high efficiency particulate absorbing filter materials by bonding the fiber web with the help of high pressure water jets emerging from micron sized nozzles and subsequently coating the filters with a chemical binder. Two different types of nonwoven filters are produced by varying the wa…
Abstract The electrical conduction in solution‐grown polymethylmethacrylate (PMMA), polyvinylidenefluoride (PVDF) and PMMA‐PVDF double‐layered samples in the sandwich configuration (metal‐polymer‐metal) was investigated at different fields in the range 100–120 kV/cm as a function of temperature in the range 293–423 K…
Abstract Complex systems are characterized by dynamical processes spread over multiple time and length scales. At a given instant, these systems can display spatial heterogeneities in which the local physical and chemical properties are nonuniform, depending on the location. They can also exhibit dynamical heterogenei…
We have developed anodized-aluminum pressure-sensitive paint (AA-PSP) as a global oxygen sensor in water. Platinum (II) meso-tetra(pentafluorophenyl)porphine is selected as a luminophore based on a dipping deposition study. The developed AA-PSP is characterized using water calibration setup by controlling dissolved ox…
The performance of a ZnO network transistor is studied by means of the change in threshold slope with varying number of nanowire channel layers. The threshold slope broadens as the number of layers in the channel increases and, in the case of a two-layer channel, a double turn-on effect can be observed. The gate-field…
Quantum cutting down-conversion (DC) with the emission of two near-infrared photons for each blue photon absorbed is realized in Yb3+-Tb3+codoped borosilicate glasses. With the excitation of Tb3+ion by a 484-nm monochromatic light, emission from the2F5/2rarr2F7/2transition of Yb3+ions is observed and this emission is…
Ultrafast transient absorption spectroscopy has been used to characterize coherent acoustic oscillations for a series of nanorods composed of a variety of metals. The nanorods are produced by electrochemical synthesis in polycarbonate templates with several pore diameters of <100 nm and high aspect ratios (>25). The m…
High-resolution magic-angle spinning NMR of high-Z spin-1/2 nuclei such as (125)Te, (207)Pb, (119)Sn, (113)Cd, and (195)Pt is often hampered by large (>1000 ppm) chemical-shift anisotropies, which result in strong spinning sidebands that can obscure the centerbands of interest. In various tellurides with applications…
We investigated the effect of SiC doping on the critical current density (Jc) in MgB2 thick films using amorphous SiC impurity layers of various thicknesses: 7, 14, 35, and 70?nm. SiC impurity layers were first deposited on the Al2O3(0001) substrates at room temperature by using a pulsed laser deposition system, after…
In this work, we use the finite-difference time-domain method in conjunction with a genetic algorithm (GA) to design a photonic crystal waveguide with gratinglike surface added for highly-efficient directional emission. By placing a detector at different locations in the output field, we have obtained both on-axis and…
The Metrology Light Source (MLS)-the dedicated electron storage ring of the Physikalisch-Technische Bundesanstalt (PTB), designed for metrology and technological applications in the spectral range from the far IR to the VUV-started user operation in April 2008.The MLS is used as a primary source standard from the NIR…
A M 6 L 6 type molecular chair, [(Zn 6 (μ-L4) 6 Cl 12 )·X] 4 (X = disordered lattice included solvents), has been isolated by reacting N, N′ -bis-(4-pyridyl)amido-2-oxo-imidizolidine ( L4 ) with ZnCl 2, and characterized by single crystal X-ray diffraction. The structure of 4 revealed a microporous nanotubular self-as…
Abstract Experience with prestressed concrete over about half a century has indicated that the corrosion resistance of conventional prestressing steel does not always satisfy, especially the prestressing steels are susceptible to chloride attack (de‐icing salts) and hydrogen (hydrogen‐induced stress corrosion cracking…
The rolling wear tests of rail material were conducted under unlubricated condition using a JD-1 wheel/rail simulation facility. The fatigue damage and wear behaviours of rail rollers were investigated in detail by examining the microhardness, wear volume, and wear scars using optical microscopy and scanning electroni…
Abstract The hydrothermal reaction of indium chlorine, 2,2’‐bipyridine, and 2,3‐pyrazinedicarboxylic acid leads to the generation of a mononuclear InIII complex, [In(bpy)(Cl)2]Cl·0.5pz·H2O (1) (bpy = 2,2’‐bipyridine, pz = pyrazine). X‐ray diffraction analysis indicates that compound 1 crystallizes in the orthorhombic…
In this study, tribological behaviors of polymer-based particle-reinforced PTFE bearings have been investigated and evaluated. Tribological properties of these particle-reinforced PTFE composite bearings have improved two- or three-fold.
The exhaust emissions from heavy-duty diesel engines (HDDEs) contribute to the degradation of ambient air quality; therefore, environmental agencies have created stringent emissions standards. Since the implementation of these standards, overall engine and fuel technology improvements have created a significant reduct…
Abstract Die Wechselwirkung von Säugerzellen mit der nanoskaligen Topographie einer Unterlage hat sich als wichtiges Signalelement zur Steuerung der Zellfunktion herausgestellt. Natürliche nanotopographische Strukturen in der extrazellulären Matrix präsentieren den umgebenden Zellen mechanotransduktive Signale, die di…