Materials Literature
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New results are presented in the area of hysteretic modeling and experimental characterization of shape memory alloys (SMAs). A stress‐induced micromechanical phase transition occurs in SMAs that causes inelastic deformation and gives rise to a large energy‐absorbing capacity. Because it is possible to achieve large h…
Protein adsorption from human plasma was investigated on phospholipid polymers, poly (2-methacryloyloxyethyl phosphorylcholine (MPC)-co-n-butyl methacrylate (BMA) or glass by radioimmunoassay and immunogold labeling techniques. In the present studies the focus was to determine the composition and distribution of prote…
The complex permeability ( mu /sub r/) and permittivity ( epsilon /sub r/) spectra at X-band frequencies and their relationship with microwave absorbing properties are investigated in ferrite-rubber composite material. Multifrequency measurements of mu /sub r/ and epsilon /sub r/ are made by the reflection/transmissio…
The neutralization of highly charged ions during interaction with metallic surfaces is accompanied by the ejection of a large number of secondary electrons. Recent experiments demonstrate two main contributions to this electron ejection process: one from the region below the surface and the second from the above-surfa…
The specification of a new standard Crystallographic Information File (CIF) is described. Its development is based on the Self-Defining Text Archive and Retrieval (STAR) procedure [Hall (1991). J. Chem. Inf. Comput. Sci. 31, 326-333]. The CIF is a general, flexible and easily extensible free-format archive file; it is…
Abstract We have recently reported on the consecutive physisorption of anionic and cationic bipolar amphiphiles onto charged surfaces, adsorbed out of aqueous solutions [1]. Here, we extend our previous concept to multipolar compounds such as polyelectrolytes. In contrast to the bipolar amphiphile system, it is not ne…
A theory is presented to predict the pullout work and ultimate tensile strength of ceramic‐matrix composite (CMC) materials tested under uniaxial tension as functions of the underlying material properties. By assuming that the fibers fracture independently and that global load redistribution occurs upon fiber fracture…
Erbium-doped yttria-stabilized zirconia (YSZ) single crystals of 84ZrO 2 /16YO 1.5 composition have been studied by electron paramagnetic resonance (EPR), optical absorption and photoemission techniques at temperatures between 10 and 680 K. At 10 K the Stark-structure of the 4 I 15/2 and 4 S 3/2 multiplets has been re…
A Mach–Zehnder interferometer with a pulsed dye-laser light source is used to observe the collapse of laser-produced cavitation bubbles in water near a rigid transparent polymeric boundary. Vapor bubbles with a maximum radius of about a millimeter are formed using a Q-switched Nd:YAG laser operating at 1.06 μm with a…
Third-harmonic generation measurements have been made for the first time on oriented films of halogen-bridged mixed-valence platinum complexes for the pump wavelength region from 0.6 to 1.0 μm. The ‖χ(3)(−3ω;ω,ω,ω)‖ spectra obtained by the Maker’s fringe method show a distinct peak at about 1.8 eV with the peak value…
We have studied the chemical vapor deposition of copper from 1,5-cyclooctadiene Cu(I) hexafluoroacetylacetonate, a moderately volatile yellow cystalline solid. It yields pure copper by pyrolytic decomposition at 150–250 °C, produces copper films with near bulk resistivity, and has the advantage of being air stable at…
Depositing alkali metal into a molecular oxygen layer dispersed on a Kr film produces alkali-metal superoxides containing the ${\mathrm{O}}_{2}^{\mathrm{\ensuremath{-}}}$ species for photoemission and near-edge study. The O K-edge spectrum of ${\mathrm{LiO}}_{2}$, ${\mathrm{KO}}_{2}$, and ${\mathrm{CsO}}_{2}$ is in go…
Direct evidence for the creation of oxygen-vacancy, oxygen-interstitial pairs in ${\mathrm{SiO}}_{2}$ glasses by an excitonic mechanism is developed from an electron-spin-resonance study of high-purity fused silicas exposed to highly focused 6.4-eV excimer laser light.
A relation for the temperature evolution of multicomponent porous ices is derived from the energy equation of multicomponent systems. It is demonstrated that the predominant energy transfer mechanisms can be incorporated into an effective thermal conductivity (λ e ƒƒ ), which is strongly temperature dependent, and tha…
. The literature on the diagenetic conversion of smectite layers to illite layers in mixed-layer illite/smectite is reviewed. According to this smectite layers are converted to illite layers during diagenesis at temperatures above 55°C and illite/smectites become IS ordered at about 100°C and at illite percentages of…
A high reverse breakdown voltage hydrogenated amorphous carbon (a-C:H)/crystalline silicon (c-Si) heterojunction diode has been successfully prepared by the photochemical vapour deposition (photo-CVD) method. This method has the advantage of being free from RF radiation. There is a lower density of fixed charges at th…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
It has often been said that 'the structure factors of all liquids (and glasses) look the same'. Those working in the field know that there is a certain truth to this, as many of the basic features are determined by hard sphere packing. However they also know that there are differences, sometimes subtle, which depend o…
Measurements have been made of the x-ray reflectivity from ultrathin, amorphous carbon films both before and after annealing. Analysis of the x-ray results indicates that annealing causes an increase in film thickness with a corresponding decrease in density. Such behavior is uncharacteristic of amorphous thin films a…
We have investigated the thermal conductivity of large diamond samples grown by both hot filament and microwave plasma assisted chemical vapor deposition in order to study in detail the processes limiting heat conduction in this system. For samples containing nearly 100% diamond material and no apparent defects, the t…