Materials Literature
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Room-temperature (20° C) epitaxy of high-melting point CeO 2 thin films was achieved for the first time on Si(111) substrates. Cross-sectional high-resolution transmission electron microscopy, Rutherford backscattering spectrometry and ion scattering spectroscopy confirmed the formation of a sharp oxide/silicon hetero…
Aliovalent Nb doping (<10 at.%) of sol—gel‐derived lead zirconate titanate (PZT) thin films was investigated with the intention of improving the ferroelectric properties. Nb addition was found to significantly alter the perovskite crystallization by stabilizing the transient pyrochlore phase, resulting in the reten…
We report storage and electrical switching of holographic image data in an economical polymer-dispersed liquidcrystal material. The hologram is recorded in a fast, single-step process and can be reversibly erased and restored repeatedly by the application of fields of approximately 10-15 V/ microm, with a response tim…
The structure of copper films grown on (0001) sapphire by molecular beam epitaxy at 200°C and 600°C was studied by in situ reflection high-energy electron diffraction (RHEED) and transmission electron microscopy (TEM). Both RHEED and TEM confirm that growth is epitaxial at 200°C, but {111}Cu textured at 600°C. However…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the Simultaneous Phase Separation and Gelation in Solutions of Dextran and GelatinR. H. Tromp, A. R. Rennie, and R. A. L. JonesCite this: Macromolecules 1995, 28, 12, 4129–4138Publication Date (Print):June 1, 1995Publication History Published online1 May 2002Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSelective Determination of DNA by Its Enhancement Effect on the Fluorescence of the Eu3+-Tetracycline ComplexYun-Xiang. Ci, Yuan-Zong. Li, and Xiao-Jing. LiuCite this: Anal. Chem. 1995, 67, 11, 1785–1788Publication Date (Print):June 1, 1995Publication History Published onlin…
Anecdotal reports suggest that soda lime and Baralyme brand absorbent can degrade inhaled anesthetics to carbon monoxide (CO). We examined the factors that govern CO production and found that these include: 1) The anesthetic used: for a given minimum alveolar anesthetic concentration (MAC)-multiple, the magnitude of C…
We describe LINUS, a hierarchic procedure to predict the fold of a protein from its amino acid sequence alone. The algorithm, which has been implemented in a computer program, was applied to large, overlapping fragments from a diverse test set of 7 X-ray-elucidated proteins, with encouraging results. For all proteins…
Abstract Investigation of the effects of an interfacial modifier on the rheological behavior of binary high‐density polyethylene (HDPE) composites showed that the interfacial modifier significantly changed the melt state behavior of HDPE/carbon black (CB) composites. This suggests that the interfacial adhesion between…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal Induced Evolution of Chlorine-Containing Precursors in Impregnated Pd/Al2O3 CatalystsCristian Contescu, Dan Macovei, Constantin Craiu, Cristian Teodorescu, and James A. SchwarzCite this: Langmuir 1995, 11, 6, 2031–2040Publication Date (Print):June 1, 1995Publication…
Abstract Four biofiber materials were compared against wood flour for their ability to act as reinforcing fillers in melt‐blended composites with polypropylene as the matrix polymer. The four materials were a waste wood composite (mixture of plywood, particleboard, and fiberboard), kenaf core, a waste jute–polyester c…
Abstract Model composites consisting of glass beads dispersed in a matrix of nylon 6 with different degrees of interfacial adhesion were prepared. The effects of interfacial adhesion on damage generation in the glass bead filled nylon 6 were studied by acoustic emission monitoring and scanning electron microscopy, and…
The effect of recasting, up to four times, non precious Ni-Cr and Co-Cr commercial dental alloys on their corrosion behaviour in saliva and saline media was carried out. A potentiokinetic technique was utilised to analyse the electrochemical characteristics of the anodic polarisation curves of these alloys. A consider…
Abstract Distributions of stress and strain in composite and cellular materials can differ significantly from the predictions of classical elasticity. For example, concentration of stress and strain around holes and cracks is consistently less than classical predictions. Generalized continuum theories such as micropol…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface Characterization of 2-Hydroxyethyl Methacrylate/Styrene Block Copolymers by Transmission Electron Microscopy Observation and Contact Angle MeasurementKazuhisa Senshu, Shuzo Yamashita, Mitsunori Ito, Akira Hirao, and Seiichi NakahamaCite this: Langmuir 1995, 11, 6, 22…
"Standardless" procedures for quantitative electron probe X-ray microanalysis attempt to eliminate the need for standardization through calculation of standard (pure element) intensities. Either "first principles" calculations, which account for all aspects of X-ray generation, propagation, and detection, or "fitted s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of the First Redox-Active Organometallic Polymers Containing Cyclosiloxanes as FrameworksCarmen M. Casado, Isabel Cuadrado, Moises Moran, Beatriz Alonso, Francisco Lobete, and Jose LosadaCite this: Organometallics 1995, 14, 6, 2618–2620Publication Date (Print):June…
Conformational and thermodynamic properties of polymer chains end-grafted to cylindrical and spherical surfaces under good solvent conditions have been studied using the single-chain mean-field theory. We have considered chains of 50, 100, and 150 segments, and five different radii from R=2 up to R=100. We have found…
Abstract Polymers with dendritic structure are a category of macromolecular architectures that has received considerable attention in the last decade. These polymers, also referred to as dendrimers, exhibit a degree of branching equal to unity. Interest in dendrimers whose branching points are linked to each other by…
Abstract Two procedures to derive all types of sphere packings with three contacts per sphere are described. 52 such types have been found. They are characterized by their shortest meshs and related to Wells' three-connected nets, if possible. It is proved that there exists no sphere packing with contact number three…