Materials Literature
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The electron beam assisted chemical etching (EBACE) method with hydrogen gas is applicable to direct fine patterning of single-crystal diamond substrates. A scanning electron microscope (SEM) combined with a gas introduction system was used for EBACE. Hole, line and rectangular patterns were successfully fabricated. I…
Mullite (3Al 2 O 3 ·2SiO 2 ) coatings on SiC substrates and SiC precoated carbon/carbon composite (C/C‐Si‐SiC) substrates were produced by pulsed laser deposition (PLD) using pressed mullite powder targets. The layers can be characterized efficiently by IR reflection spectroscopy in the spectral range between 650 and…
Experimental heat capacity, dielectric, and shear spectroscopy data are reported on the αβ splitting region of poly( n -octyl methacrylate). New facets of a major difference between the high-temperature a relaxation at frequencies above the αβ splitting region and the ordinary α relaxation below are obtained: An α coo…
An observation of diamond nanocrystal nucleation in the course of hydrogenated amorphous carbon film growth under ion sputtering of graphite is reported. Transmission electron microscopy (TEM) (100 keV), selected-area electron diffraction and optical absorption (1–6 eV) studies of the prepared hydrogenated amorphous c…
In this work, the authors derive the weighting functions of the Preisach model of hysteresis (used for real-time control applications) corresponding to the uniaxial isothermal psuedoelastic response of an SMA polycrystal. A uniform distribution of single crystals is taken to constitute the polycrystal. The assumed pha…
Abstract Biodegradation of plasticized cellulose acetate (PCA) was established with a standard municipal solid waste (ED 73). The relative percent weight loss of the specimen was measured, and the aerobic biodegradation was evaluated in a controlled aerobic composting system that was designed to capture CO 2 produced…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTCarbon−Carbon Bond Formation with Allylmagnesium ChlorideDouglass F. Taber, John H. Green, and John M. GeremiaView Author Information Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716 Cite this: J. Org. Chem. 1997, 62, 26, 9342–9344Publica…
An analysis was carried out of the mechanism underlying magnetic interlayer interaction in film structures. The investigation was based on the assumption that interlayer bonding affects film hysteresis. This was based on experimental data on the coercive force, the domain structure parameters, and the microstructure o…
The crystalline network structure of conducting (ET)2I3 reticulate doped polycarbonate (RDP) films were analysed by X-ray as well as ESR, transport properties and superconducting characteristics of the films were investigated. It was found that under certain conditions of the second step of the RDP-film preparation, a…
The existence of the ternary intermetallic {phi} phase in the Mg-Al-Zn system was first established by Clark. However its crystal structure remained undetermined until now. In this paper, a method using transmission electron microscopy, initially developed by Steeds and Vincent, has been applied to determine the unit…
In this short article, we draw attention to the pioneering studies of Daniel Vorlander, who lived from 1867 to 1941 and worked in Halle, Germany between 1890 and 1935. The number and range of compounds synthesized under his guidance are truly vast, but much of his work is hidden away in Doctoral theses. All of these d…
Polymer dispersed liquid crystals (PDLCs) are materials composed of liquid crystal microdroplets dispersed in a polymer matrix. Their electro-optic properties make them useful for applications as large-area electrically switchable architectural windows (smart windows). For these applications, the key parameters of per…
The metallocene-catalyzed syndiospecific synthesis of the new homopolymer of p - n -butylstyrene and its random copolymers with styrene is reported. The crystalline morphology of the resulting polymers is studied by means of atomic force microscopy (AFM), wide-angle X-ray scattering (WAXS), differential scanning calor…
An overall strategy for phase equilibrium calculations within chemically reacting multicomponent nonideal systems is presented. The strategy involves three stages and employs an indirect method to determine the phase configuration of the reacting system at equilibrium. The latter is based on an existing technique for…
The temperature evolution of the optical absorption spectra of A2BX4 type compounds with an organic cation have been analyzed. It was shown that the fundamental absorption edge in these materials possesses an exponential shape following the empirical Urbach rule due to the occurrence of the electron–(exciton–)phonon i…
Atactic polystyrene of M = 330,000 Da and Mw/Mn = 1.04 was subjected to chloromethylation. By the heating of chloromethylpolystyrene with SnCl4 in a very dilute solution in ethylene dichloride, the polymeric coils were converted into intramolecularly hypercrosslinked macromolecules, nanosponges, of molecular weight of…
The stress-strain behaviour of two Ni-Ti and two Copper Ni-Ti orthodontic wires was examined in induced torsion under controlled conditions of moment and temperature. The tests clearly demonstrate the diversity of behaviour of these wires. The loading and unloading curves and plateau regions were found to be closely r…
The spectral dependence of the angular distributions of photoelectrons produced by the single-photon detachment of ${\mathrm{Al}}^{\mathrm{\ensuremath{-}}},$ ${\mathrm{Si}}^{\mathrm{\ensuremath{-}}},$ and ${\mathrm{P}}^{\mathrm{\ensuremath{-}}}$ ions has been measured at five discrete photon wavelengths ranging from 4…
We have used resonance-Raman scattering to study the effects of hydrostatic pressure (to 80 kbar) on polyiodide chain vibrations in iodine-doped poly(vinyl alcohol) films. Two strong fundamental bands are observed along with overtone and combination bands. The low-energy band at 107 cm -1 is attributed to symmetric st…
We present a study of the effect of oscillatory shear on the crystallization of supercooled water in nonequilibrium molecular dynamics simulations of simple water models. [The TIP4P model has been used throughout; calculations using the extended simple point charge (SPC/E) model were checked for consistency and gave q…