Materials Literature
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We have investigated mechanical properties of diamond-like carbon (DLC) thin films, particularly the internal compressive stress and ways to alleviate it. Foreign atoms such as copper, titanium, and silicon were incorporated into the DLC films during pulsed laser deposition. The chemical composition of the doped films…
Using atomic force microscopy (AFM), detailed information on the formation of the nuclei and the growth of the lamellae is obtained. This is the first experimental data that show the appearance and disappearance of embryos, as predicted by thermodynamics. In addition, it is shown that branching is initiated by seconda…
Eight-coordinate gadolinium(III) complexes involving four chelating nitronyl nitroxide ligands have been prepared. An antiferromagnetic Gd(III)−nitroxide coupling is characterized for the first time in these five-spin systems.
We present mode-coupling equations for the description of the slow dynamics observed in supercooled molecular liquids close to the glass transition. The mode-coupling theory (MCT) originally formulated to study the slow relaxation in simple atomic liquids, and then extended to the analysis of liquids composed by linea…
This comparative study addresses the influence of microstructural evolution on mechanical properties of porous alumina sintered with and without the application of uniaxial pressure. A complete set of data on Young's modulus, long‐crack fracture toughness, and fracture strength for two alumina powders as a function of…
Plane-wave pseudopotential calculations of total energies were performed for three ordered perovskite related supercells in each of the eight stoichiometries of ${A(B}_{1/3}{B}_{2/3}^{\ensuremath{'}}){\mathrm{O}}_{3};$ $A=\mathrm{P}\mathrm{b},\mathrm{}\mathrm{Ba},B=\mathrm{Z}\mathrm{n},\mathrm{}\mathrm{Mg}$ and, ${B}^…
Abstract A porphyrin henicosamer was designed, synthesized, and structurally characterized using scanning tunnelling microscopy.
An apparatus for deep-ultraviolet interferometric lithography is described, in which the interfering beams illuminate the substrate through a fused silica prism and a layer of index-matching liquid. The liquid-immersion technique was found to be compatible with a commercially available, chemically amplified photoresis…
Soil properties in central and northeastern British Columbia are strongly influenced by parent materials because of geologically young till, glaciolacustrine, and glaciofluvial deposits. We examined pedogenesis on various parent materials to support studies of long-term forest productivity. We sampled nine pedons deve…
OBJECTIVE: To characterize the proton-magnetic relaxation properties and complexation equilibria of gadobenate dimeglumine and to develop a pharmaceutical formulation for injection. METHODS: Proton-magnetic relaxivities were determined at 20 MHz and 39 degrees C. Metal complexation was studied potentiometrically. Degr…
Thin films of (001)-oriented Sr2FeMoO6 have been epitaxially deposited on LaAlO3 and SrTiO3 (001) substrates. Comparison of their transport and magnetic properties with those of polycrystalline ceramic samples shows a metallic versus semiconductor temperature dependence and a saturation magnetization Ms at 10 K of 3.2…
Dense Si/SiC composites were fabricated via a conventional reaction‐bonding process, using oak charcoal that exhibited a honeycomb structure. The silicon melt was infiltrated into the porous oak charcoal (density of ~0.6 g/cm 3 ) while the sample was heated to 1700°C under vacuum (10 ‐3 torr (~0.133 Pa)), which result…
The high-luminance blue emitting electroluminescent (EL) devices which have been satisfied with the requirement for full color displays were obtained. BaAl 2 S 4 :Eu thin-film EL devices as the new blue emitting EL phosphor was prepared by the two targets pulse-electron-beam evaporation. The maximum luminance level wa…
The alpha-helical coiled coil motif is among the first characterized and widely found architecture of protein structures. We report here a fast and reliable approach of simulated annealing molecular dynamics (SA/MD) for predicting the three-dimensional structures of various alpha-helical coiled coils of heptad repeat.…
When a new textbook on transmission electron microscopy is published and all of one's colleagues, established research scientists and graduate students alike, immediately go out and buy a copy–some even using their own money–then that is probably the best recommendation a book can ever get!
The metal atom disorder in the crystalline clusters Fe 2 Ru(CO) 12 ( 1 ) and FeRu 2 (CO) 12 ( 2 ) has been shown to be dynamic in origin. At and below 313 K, 1 crystallizes in the noncentrosymmetric space group Pn with two independent molecules in the asymmetric unit, both molecules having approximate C 2 v symmetry w…
Pulsed laser deposition is a well established deposition technique for oxide thin films and heterostructures. The knowledge and control of the growth processes of oxide materials are important for the fabrication of high-quality epitaxial and heteroepitaxial thin-film structures. Because of the high oxygen pressure du…
The experimental techniques and theoretical background as well as some examples of material strength measurements at submicrosecond load durations are discussed. The presented experimental data for engineering metals and alloys and for metal single crystals demonstrate the effects of material grain structure and tempe…
The reduction behavior of sputtered thin Cu 2 O films with hydrogen plasma generated by a dielectric-barrier glow discharge was investigated by means of surface characterization and hydrogen plasma diagnosis using the vacuum ultraviolet (VUV) line absorption technique. The reduction model was derived by assuming that…
The correlation between electron field-emission properties of diamond films prepared by the chemical vapor deposition (CVD) process and the defect structure induced by boron doping was examined. Secondary ion mass spectroscopic analysis indicates that the solubility limit of boron in diamond is (B3+)2=5×1021 cm−3, whe…