Materials Literature
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A bistable spatial light modulator is developed by utilizing optical bistability of ferroelectric liquid-crystal molecule.Both positive and negative images are read out by changing the polarity of applied electric pulses. A binary image is stored for more than 2 h, and gray-level operation is also possible during the…
Electron and phonon spectra, densities and integrated densities of states, and dynamic-response functions are investigated for a variety of two-dimensional (2D) quasicrystals. The dynamical properties of a Fibonacci chain, extended both periodically and quasiperiodically into a second dimension, are obtained using an…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew low-dimensional zinc compounds containing zinc-oxygen-phosphorus frameworks: two-layered inorganic phosphites and a polymeric organic phosphinateMinghuey Shieh, Kevin J. Martin, Philip J. Squattrito, and Abraham ClearfieldCite this: Inorg. Chem. 1990, 29, 5, 958–963Publi…
Tables are given of all coincidence orientations with multiplicity Σ ≤ 36 for rhombohedral lattices with axial ratios in the range of corundum type structures (2.696 < c/a < 2-765). Measurements of the relative orientation of 133 pairs of neighbouring grains in sintered a-alumina showed that near-coincidence boundarie…
We present the design and characterization of a spatial light modulator (SLM) comprising a ferroelectric-liquid-crystal light-modulating layer on top of a silicon integrated circuit. Our SLM consists of two electrically addressed arrays on the same integrated-circuit die. The first, a 1 x 128 linear array with a 20-mi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural control of conjugation in functionalized polythiophenesJean Roncali, Pascal Marque, Robert Garreau, Francis Garnier, and Marc LemaireCite this: Macromolecules 1990, 23, 5, 1347–1352Publication Date (Print):March 1, 1990Publication History Published online1 May 200…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular orientation in LB films of azobenzene-containing long-chain fatty acids and their barium salts studied by FT-IR transmission and reflection-absorption spectroscopyTakeshi Kawai, Junzo Umemura, and Tohru TakenakaCite this: Langmuir 1990, 6, 3, 672–676Publication Dat…
Abstract A series of poly(ether/ester)s 1 based on poly(butylene terephthalate) Systematic IUPAC nomenclature: poly(oxytetramethyleneoxyterephthaloyl). and poly(ethylene glycol) is synthesized. 1 H and 13 C nuclear magnetic resonance, infrared and differential scanning calorimetry (DSC) measurements prove a block stru…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProbe diffusion in polyacrylamide gels as observed by means of holographic relaxation methods: search for a universal equationIl Hyun Park, Charles S. Johnson Jr., and Don A. GabrielCite this: Macromolecules 1990, 23, 5, 1548–1553Publication Date (Print):March 1, 1990Publica…
Abstract An empirical method to estimate rapidly both mean total layer charge and location of charge in smectites and vermiculites is presented, involving exchange with a long-chain alkylammonium ion before and after the Greene-Kelly test. The method utilizes an empirically determined relationship between XRD basal sp…
High-resolution specific-heat measurements on a small (0.2 mg) single crystal of \ensuremath{\kappa}-(BEDT-TTF${)}_{2}$Cu(NCS${)}_{2}$ in magnetic fields up to 5 T reveal a jump \ensuremath{\Delta}C at ${\mathrm{T}}_{\mathrm{c}}$. Comparison with \ensuremath{\gamma}=34 mJ/mol ${\mathrm{K}}^{2}$ derived from Pauli para…
ABSTRACT Ice diatom assemblages in the Canadian Arctic are dominated by the Naviculaceae, a family which includes the genus Stenoneis Cleve. A taxonomic history of S. inconspicua var. baculus (Cleve) Cleve (including type material of Navicula baculus Cleve) is presented with morphological data including the first SEM…
Using a temperature-humidity-bias (THB) screening test, nine commercial polyimides were evaluated for applications to multichip packages with a multilevel interconnection structure. Among these polyimides, DuPont PI2555 performed best under the test condition, i.e. 85 degrees C/85%RH (relative humidity)/180-V DC bias…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLuminescence at high pressures and magnetic fields and the structure of single-crystal platinum(II) binuclear complexes Mx[Pt2(POP)4].cntdot.nH2O (Mx = Ba2, [NH4]4; POP = P2O5H22-)Ludwig Baer, Helmut Englmeier, Guenter Gliemann, Ulrich Klement, and Klaus Juergen RangeCite th…
A method combining the improved R- Psi method (in which the electrical vector potential R only exists in the conducting region) and the IEM (integral equation method) is described which synthesizes the advantages of the two methods and reduces the CPU time and the storage space required to solve 3-D eddy-current probl…
Abstract The structures of orthorhombic ( a =5.5686(2)Å, b =9.8946 (2)Å, c =3.19369(12Å) and cubic ( a =9.177(3)Å) Cd 2 SnO 4 were refined by Rietveld analysis of X-ray powder diffraction patterns. Both of these polymorphs were chemically treated with hydrogen gas mixtures at 400°C, resulting in a colour change from y…
Benchmark problem 10 of the TEAM workshop consists of steel plates around a coil (non‐linear transient eddy current problem). Six computer codes are applied, and 6 solutions are compared with each other and experimental results for eddy current densities as well as flux densities. Some codes were found to give oscilla…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular model for the mechanical properties of elastomers. 2. Synergic effects in bimodal cross-linked networksYves TermoniaCite this: Macromolecules 1990, 23, 5, 1481–1483Publication Date (Print):March 1, 1990Publication History Published online1 May 2002Published inissue…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAbsorption method to clean solvent-contaminated process airBjoern L. Armand, Helena B. Uddholm, and Paer T. VikstroemCite this: Ind. Eng. Chem. Res. 1990, 29, 3, 436–439Publication Date (Print):March 1, 1990Publication History Published online1 May 2002Published inissue 1 Ma…
Damage production, radiation annealing and stage I recovery in some FCC metals irradiated with ∼ 1 MeV and ∼ 100 MeV ions near 10 K are studied using electrical resistivity measurements. For ∼ 1 MeV light and heavy ion irradiations, the fraction of stage I recovery and the damage efficiency decrease with the PKA media…