Materials Literature
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The out-of-plane anchoring strength at the interface between 4-n-pentyl-4′-cyanobiphenyl (5CB) and an obliquely evaporated SiO was measured as a function of temperature by applying the ‘‘high-electric-field technique’’ recently developed by Yokoyama and van Sprang [J. Appl. Phys. 57, 4520 (1985)]. The orientational ‘‘…
Abstract. We have examined transport, sites of photosensitization, and plasma protein binding by sulfonated derivatives of tetraphenylporphine in vitro and tumor localization of these products in vivo. Studies carried out in culture indicate that the mono‐sulfonated porphyrin sensitized mainly at intracellular loci wh…
The crystal structure of ${\mathrm{La}}_{1.85}$${\mathrm{Sr}}_{0.15}$${\mathrm{CuO}}_{4}$ has been determined at 300, 60, and 10 K by neutron diffraction powder profile analysis. The structure is of the tetragonal ${\mathrm{K}}_{2}$${\mathrm{NiF}}_{4}$ type at ambient temperature, but undergoes an orthorhombic distort…
Abstract The morphology of blends of polycarbonate and nylon 6,6 with a copolyester of 60 mole percent p‐hydroxybenzoic acid/40 mole percent poly(ethylene terephthalate) was characterized under different processing conditions. In particular, single‐screw extrusion, steady simple shear flow, and flow through a capillar…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTObtaining the kinetic parameters from thermogravimetry using a modified Coats and Redfern techniqueP. Ernesto Fischer, Chon Shin Jou, and Shyam S. GokalgandhiCite this: Ind. Eng. Chem. Res. 1987, 26, 5, 1037–1040Publication Date (Print):May 1, 1987Publication History Publish…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrostructure of formamide microemulsions from NMR self-diffusion measurementsK. P. Das, A. Ceglie, and B. LindmanCite this: J. Phys. Chem. 1987, 91, 11, 2938–2946Publication Date (Print):May 1, 1987Publication History Published online1 May 2002Published inissue 1 May 1987h…
Solid state (diffusion) bonds have been developed in AA 7475E sheet material using different regimes of bonding temperature, pressure, and time. The bonds produced have exhibited shear strengths in the range 30–150 MN m−2 and have been found to be capable of withstanding peel during a slow high-temperature superplasti…
The increasing integration of microelectronics into the submicrometer region for VHSIC and VLSI applications necessitates the examination of these structures both for linewidth measurement and defect inspection by systems other than the optical microscope. The low beam-voltage scanning electron microscope has been rec…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescence spectra of a series of cerium(III) halides and organometallics. Probes of bonding properties using 4f-5d excited statesPaulette N. Hazin, Joseph W. Bruno, and Harry G. BrittainCite this: Organometallics 1987, 6, 5, 913–918Publication Date (Print):May 1, 1987Publ…
Abstract The Raman and infrared spectra of the superionic protonic conductor CsHSO 4 (CsDSO 4 ) were investigated in the 18–450 K range. Polarized single crystal Raman and infrared reflection spectra were also studied at room temperature. An assignment of bands due to internal and external vibrations is given in terms…
FeCr alloys with concentrations ranging from 50 p.p.m. to 3% Cr have been irradiated with electrons of 1.6 MeV at low temperature (30 K) and studied by resistivity measurements. Pre-irradiation measurements show important deviations from Matthiessen's rule in the annealed alloys: the resistivity increment per unit con…
A new type of liquid crystals made up of bowl-like molecules was predicted by Lin in 1982 and was recently synthesized. In is paper, the experimental findings about these bowlic mesophases are briefly summarized. Possible mesophases (polar nematic, non-polar nematic, cholesteric, stringbean, donut, columnar, etc.) are…
Abstract ESCA and contact angle measurements were used to characterize the surfaces of Polyethylene and polypropylene films exposed to SF 6 , CF 4 , and C 2 F 6 plasmas. None of these gases polymerized in the plasma. However, all plasma treatments grafted fluorinated functionalities directly to the polymer surfaces. S…
We have measured the phase diagrams of mixtures of chiral and racemic CE4, CE5, and CE2 in order to study the effect of varying chirality on the existence of blue phases in chiral liquid crystals. We observe three blue phases---BPI, BPII, and BPIII---which progressively appear at the isotropic phase boundary as the ch…
Energetic ion-beam irradiation of diamondlike carbon thin films induces a decrease of 5–6 orders of magnitude in the resistivity of the films from their as-grown value of 107 Ω cm. Diagnostics used to characterize the nature of the transformation included optical absorption measurements (band gap), Raman spectroscopy…
Research Papers The Melting Process Within Spherical Enclosures S. K. Roy, S. K. Roy University of Miami, Coral Gables, FL 33124 Search for other works by this author on: This Site PubMed Google Scholar S. Sengupta S. Sengupta University of Miami, Coral Gables, FL 33124 Search for other works by this author on: This S…
Binuclear copper(11) complexes of fatty acids crystallize at room temperature in a lamellar lattice that has been characterized by X-ray diffraction. A transition to a thermotropic columnar mesophase is observed at about 110-120°C for each compound of the series n = 12 to n = 22, n being even and equal to the number o…
Raman spectra of iron phosphorus trichalcogenide crystals (FeP${X}_{3}$,X=S,Se) are measured, and a compilation of the peak frequencies is given. The spectral features due to first-order phonon Raman scattering are analyzed and assigned. At low temperatures in iron phosphorus trisulfide the vibrational Raman-scatterin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleCorrelation between the glass transition temperatures of polymer mixtures and intermolecular force parametersT. K. Kwei, Eli M. Pearce, John R. Pennacchia, and M. ChartonCite this: Macromolecules 1987, 20, 5, 1174–1176Publication Date (Print):May 1, 1987Publication History Publi…
The effects of carbon on the magnetic properties of steel have been of great interest over the years both because of the great commercial importance of steel and because it is known that carbon is the most important single factor affecting the magnetic properties of steel. Slight changes in the amount and distribution…