Materials Literature
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The effect of humidity on the electrical conductivity in porous and dense ceramics of ( , 1.7, 3.4) with a mayenite structure was examined at room temperature. Surface ionic conductivity was enhanced by increasing the humidity. The sample with , which had a porosity of 30%, exhibited the largest conductivity change of…
Conformational changes play important roles in the regulation of many enzymatic reactions. Specific motions of side chains, secondary structures, or entire protein domains facilitate the precise control of substrate selection, binding, and catalysis. Likewise, the engineering of allostery into proteins is envisioned t…
We report an electric-field-induced SmA-SmC transition in a liquid crystal formed by achiral bent molecules. The steric moment of such molecules is too small to spontaneously induce the phases characteristic to the bent-core mesogens. On the other hand, its contribution to the thermodynamical properties of the mesopha…
Fatigue testing for twelve SG tubular fabrics with various textile parameters was performed under pulsatile pressure by an Accelerated fatigue tester. Two time points as of 0, and 1 x 10(8) cycles were selected. The percentage change of tubular diameter, fabric count, porosity, and water permeability before and after…
Small and stable: A triafulvalene derivative is indefinitely stable at room temperature both in solution and in the solid state under inert atmosphere. The triafulvalene is synthesized by the magnesium-catalyzed coupling of two bis(chlorocyclopropenyl) derivatives. The two unsaturated three-membered rings are linked t…
Many fundamental problems in materials science, physics, and particular nanotechnology rely on the direct determination and characterization of atomic arrangements and electronic environments of individual interfaces or defects. In this paper, we will show how aberration-corrected Z-contrast imaging in combination wit…
Nonstoichiometries of and transport properties of were investigated. At , transformed to CaO and CoO. The reaction products offer a precise baseline for thermogravimetric analysis. At room temperature, δ in is 0.38, which decreases at , indicating the onset point of the formation of oxygen vacancies, and δ is at . Cor…
Self-assembling functionalized multi/single-walled carbon nanotubes (MWCNTs/SWCNTs) in a controlled manner may be an interesting route towards novel nanoscaled supramolecularly arranged MWCNT/SWCNT-based architectures as sensing constructs. Due to the presence of fullerene-like end-caps sensitive to oxidation, the oxi…
Abstract Oppositely charged polyelectrolyte (poly(allyamine hydrochloride) (PAH) and poly(sodium 4‐styrene‐sulfonate) (PSS)), and negatively charged gold nanoparticles (Au) were assembled alternately on polystyrene (PS) spheres via layer‐by‐layer technique, and the different PAH/(PSS/PAH) n /(Au/PAH) m /Au composite h…
A rapid thermal annealing process using a DC vacuum arc discharge system was shown to reduce defects in carbon nanotubes (CNTs). Multi-walled CNTs (MWCNTs) exhibit high-density structural imperfections when deposited via chemical vapour deposition at relatively low temperatures (∼650°C). These defects can be thermally…
Abstract ZnO nanostructures composed of nanosheets have been synthesized by a facile low temperature reaction of Zn(OH) 2 and NaOH without the aid of any organic molecular templates. The influences of the reaction parameters, such as the concentrations of Zn(NO 3 ) 2 , reaction temperatures, and reaction time on the m…
In natural diamonds a sulfur-related paramagnetic center labeled W31 has been previously tentatively assigned to an interstitial sulfur species in a positive charge state. However, we show by combining an assessment of available experimental data and density-functional simulations that the hyperfine tensors can be att…
Abstract Low lattice‐mismatched γ‐LiAlO 2 (100) substrates were employed to grow ZnO epitaxial films by chemical vapor deposition. The influence of growth temperature on growth behavior of ZnO was investigated. Results indicated that the low lattice‐matched (10 $ \bar 1 $ 0) crystallites nucleate on substrate at all g…
The primary mission of the Army is to fight and win the Nation's wars. Conducting offensive and defensive operations has long been the Army's core capability. However, the recent experience of operations in the Balkans, Iraq, and Afghanistan, coupled with today's operational environments, clearly indicates that the fu…
The Ni/SiO2 composite microcapsules were prepared by a one-pot synthesis via thermally decomposing Ni(acac)2·2H2O in 2-pyrrolidone in the presence of tetraethyloxysilane and 3-aminopropyltrimethoxysilane (APS). Transmission electron microscopy and powder X-ray diffraction were used to characterize the general morpholo…
Abstract Aufgerollt wie ein Teppich : Durch Anbringen flexibler Knäuel an den Mittelteil starrer stabförmiger Moleküle entstehen T‐förmige Stab‐Knäuel‐Konstrukte, die selbstorganisierte Schichten aufbauen. Diese Schichten rollen sich auf, sodass im Festkörper, je nach Größe der Knäuel, ausgefüllte Zylinder oder hohle…
A composite film fabricated by plasma treated poly(etherimide) with subsequent deposition of gold nanoparticles and lysine using layer by layer assembly has been demonstrated to be good for cell attachment and proliferation making it an attractive strategy for tissue engineering applications. As compared to the other…
The electronic states of zinc magnesium oxide (Zn 1− x Mg x )O thin films were determined exactly by hard X-ray photoemission spectroscopy (HX-PES) using synchrotron radiation. The Zn 2p core level was shifted to a higher binding energy along with widening of the bandgap by alloying with MgO, whereas the shift of the…
Different chemical states of titanium oxide films were deposited on commercially pure Ti (CP Ti) by electron-beam evaporation at different oxygen flow rates to examine a possibility of their applications to endovascular stents. The surface morphology, chemical composition and crystal structure of the obtained titanium…
A general method for the functionalization of silica surfaces with silicon hydride (Si-H) groups is described for four different preparations of silica. The silica surface is reduced in a two-step chlorination-reduction procedure within a simple gas-flow system at high temperatures. After initial dehydroxylation of th…