Materials Literature
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A new method of high-resolution electron microscopy image analysis is presented which improves considerably the visibility of nanocrystals in amorphous materials. The technique is based on individual Bragg filtering of the lattice fringes in the image. The significant feature is that the amplitude and phase of the fri…
Over the past two decades the amount of effort devoted to the study of metal oxides by surface scientists has increased significantly. The general characteristics of the electronic structure of metal-oxide surfaces are now fairly well understood, although transition-metal oxides have been more thoroughly studied than…
Complex dielectric constant of an antiferroelectric liquid crystal family represented by 4-(1-methylheptyloxycarbonyl) 3-fluorophenyl 4'-dodecylbiphenyl-4-carboxylate was measured in the frequency range between 10 -2 Hz and 10 7 Hz. The experimental results were analyzed using a generalized Cole-Cole expression, and s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAryl fluoride monomers in nucleophilic aromatic substitution polymerization: evaluation of monomer reactivity by 19F NMR spectroscopyKenneth R. CarterCite this: Macromolecules 1995, 28, 19, 6462–6470Publication Date (Print):September 1, 1995Publication History Published onli…
Equilibrium constants and enthalpy changes for reactions catalyzed by the lyase class of enzymes have been compiled. For each reaction the following information is given: the reference for the data; the reaction studied; the name of the enzyme used and its Enzyme Commission number; the method of measurement; the condi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of p-Methylstyrene Comonomeric Units on the Polymorphic Behavior of Syndiotactic PolystyreneCarla Manfredi, Gaetano Guerra, Claudio De Rosa, Vincenzo Busico, and Paolo CorradiniCite this: Macromolecules 1995, 28, 19, 6508–6515Publication Date (Print):September 1, 199…
Phase analysis and dielectric measurement have been conducted for a comprehensive study of the phase transition in the whole composition range of (1- x )Pb(Yb 1/2 Nb 1/2 )O 3 - x PbTiO 3 (PYN-PT) ceramic system. For all compositions, a continuous series of complete solid solutions of the antiferroelectric (AFE) and th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGas/Solid Reactions with Nitrogen DioxideGerd Kaupp and Jens SchmeyersCite this: J. Org. Chem. 1995, 60, 17, 5494–5503Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September 1995https://pubs.acs.org/doi/10.1021/jo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCondensation of Keggin Anions Containing Chromium(III) and Aluminum(III), Respectively. 1. Synthesis and X-ray Structural Determination of [{A-.alpha.-SiO4W9O30(OH)3Cr3}2(OH)3]11-Knut Wassermann, Rosemarie Palm, Hans-Joachim Lunk, Joachim Fuchs, Norbert Steinfeldt, and Reinh…
A molecular-dynamics simulation of lithium metasilicate (${\mathrm{Li}}_{2}$${\mathrm{SiO}}_{3}$) has been performed. A clear two-step relaxation was observed at 700 K in a density correlation function (self-part) for Li ions following an exponential decay by vibrational motion. Oscillation is found in the second (\en…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigation of the Alkali-Metal Vanadium Oxide Xerogel Bronzes: AxV2O5.cntdot.nH2O (A = K and Cs)Y.-J. Liu, J. A. Cowen, T. Kaplan, D. C. DeGroot, J. Schindler, C. R. Kannewurf, and M. G. KanatzidisCite this: Chem. Mater. 1995, 7, 9, 1616–1624Publication Date (Print):Septe…
SO<sub>2</sub> chemisorption on oxygenated Pt(111) enormously enhances the dissociative chemisorption and subsequent combustion of propane. This activation of the metal surface is induced by an adsorbed sulfoxy species which is formed at >220 K. In the absence of adsorbed SO<sub>2</sub> the sticking probability of…
A derivation is presented for X(t), the transformed fraction as a function of time, in a phase transformation process which produces randomly oriented anisotropic particles. The key novel element in the development and results is the inclusion of blocking (shielding) effects. The derivation is performed for a 2D syste…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic Resolution of Racemic Chromenes via Asymmetric Epoxidation: Synthesis of (+)-Teretifolione BSusan L. Vander Velde and Eric N. JacobsenCite this: J. Org. Chem. 1995, 60, 17, 5380–5381Publication Date (Print):September 1, 1995Publication History Published online1 May 2…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect Measurement of the Electric Double-Layer Structure in Hydrated Lithium Vermiculite Clays by Neutron DiffractionN. T. Skipper, M. V. Smalley, G. D. Williams, A. K. Soper, and C. H. ThompsonCite this: J. Phys. Chem. 1995, 99, 39, 14201–14204Publication Date (Print):Sept…
Amorphous hydrogenated carbon films (a-C: H) were deposited in a capacitively coupled r.f. discharge reactor. The precursor gas and the amount of doping and inert gas added during deposition were changed in a systematic manner. The d.c. conductivity was measured in the temperature range 80 to 500 K. The conductivity b…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Magnetic Properties of a Tetranuclear Copper(II) Complex with a .mu.-1,2,3,4-Squarato Coordination Mode. Crystal Structure of (.mu.-1,2,3,4-Squarato)tetrakis[(tris(2-aminoethyl)amine)copper(II)] PerchlorateIsabel Castro, Jorunn Sletten, Maria Luisa Calatayud, M…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural study of poly(vinyl alcohol) in the gel state by high-resolution solid-state 13C NMR spectroscopyMasatoshi Kobayashi, Isao Ando, Takahiro Ishii, and Shigetoshi AmiyaCite this: Macromolecules 1995, 28, 19, 6677–6679Publication Date (Print):September 1, 1995Publicat…
Barium titanate single-crystal particles with various average particle sizes (20-100 nm) were prepared by a hydrothermal method. In the particles as prepared, there were a lot of hydroxyl group and barium vacancies as the lattice detects, and the concentration of the lattice defects increased with decreasing particle…
Specimen damage caused by mass loss due to electron beam irradiation is a major limitation in low-temperature scanning electron microscopy of bulk specimens. At high primary magnifications (e.g., 100,000 x) a hydrated sample is usually severely damaged after one slow scan (about 3000 e-nm-2). The consequences of this…