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We have used perturbed-angular-correlation (PAC) spectroscopy to measure nuclear-electric-quadrupole interactions at the Ti site in ceramic samples of rutile ${\mathrm{TiO}}_{2}$. To investigate differences in the probe crystal chemistry, we used two chemically different PAC probes, $^{111}\ensuremath{\rightarrow}^{11…
The development of important applications related to optical telecommunications and optical signal processing rely increasingly on nonlinear optical phenomena underlying these optical functions such as frequency conversion and modulation, amplification and emission, multiplexing and directional switching, optical logi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBehavior of Poly(D,L-lactic acid) Monolayers at the Air-Water Interface. Effect of Spreading SolventsCatherine Ringard-Lefebvre and Adam BaszkinCite this: Langmuir 1994, 10, 7, 2376–2381Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Publis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsotopic Labeling Studies of the Effects of Temperature, Water, and Vanadia Loading on the Selective Catalytic Reduction of NO with NH3 over Vanadia-Titania CatalystsBronwyn L. Duffy, H. Edward Curry-Hyde, Noel W. Cant, and Peter F. NelsonCite this: J. Phys. Chem. 1994, 98,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharacterization of Titanium and Zirconium Valerate Sol-Gel FilmsKathryn G. Severin, Jeffrey S. Ledford, Beatrice A. Torgerson, and Kris A. BerglundCite this: Chem. Mater. 1994, 6, 7, 890–898Publication Date (Print):July 1, 1994Publication History Published online1 May 2002P…
The wavelength dependence of the optical reorientation of nematic liquid crystals is investigated in the presence of two dyes, using the z-scan technique. A strong correlation is found between the magnitude of the dyeinduced amplification of the optical torque and the dichroism of the system.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, Crystal Structure, Electrical Properties and Electronic Band Structure of (NHyMe4-y)x[M(dmit)2] Complexes (M = Ni, Pd, Pt; dmit2- = 2-Thioxo-1,3-dithiole-4,5-dithiolato)Brigitte Pomarede, Benedicte Garreau, Isabelle Malfant, Lydie Valade, P. Cassoux, Jean-Pierre L…
Thermal conductivity of crystalline natural nitrogen was investigated over the temperature range 1.2--38 K. The temperature dependence of thermal conductivity of \ensuremath{\alpha}-nitrogen has been determined in temperatures below 18 K. The thermal conductivity coefficient reaches the maximum value 250 mW/cm K at 3.…
Inelastic-neutron-scattering experiments have been performed on samples of amorphous hydrogenated carbon, prepared from acetylene and propane, containing about 35 and 32 at. % hydrogen, respectively. In these hard carbons, the hydrogen is predominantly bonded to ${\mathit{sp}}^{3}$ carbon, with approximately equal con…
Abstract The dielectric loss function of ZrO 2 over 0–80 eV has been determined from a quantitative analysis of reflection electron energy loss spectra (REELS) at different primary energies. From this, the inelastic electron mean free path for 200–2000 eV electrons in ZrO 2 has been calculated. The inelastic mean free…
Abstract The catalytic polymerization of aniline and its derivatives was performed by stirring the solution of the corresponding monomer and copper(II) salts (50/5, mmol/mmol) in acetonitrile and water (1/1, v/v) under oxygen at room temperature for 24 h. Among copper salts, CuBr2 and CuCl2 are more active than the ot…
Abstract Enantioselective aerobic epoxidation of acyclic cis-olefins into the corresponding optically active epoxides was carried out with good-to-high enantioselectivities by using a new class of optically active β-ketoiminato manganese(III) complex catalyst, N,N′-ethylenebis(α-mesitoyl-β-ketoiminato)manganese(III) c…
The influence of the chemical environment on the low-energy ion scattering (LEIS) intensities from aluminum and nickel is investigated by studying a number of different alloys (Ag80Al20, Ni80Pt20, NiAl{110}) and oxides (γ-Al2O3, α-Al2O3, α-Al2O3 sapphire {11̄02}, NiO, 14 wt % Ni/γ-Al2O3). The neutralization behavior o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel Diprophyrins Containing N4 and N3S Cores: Synthesis, Characterization, and Electrochemical PropertiesR. P. Pandian and T. K. ChandrashekarCite this: Inorg. Chem. 1994, 33, 15, 3317–3324Publication Date (Print):July 1, 1994Publication History Published online1 May 2002P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of Sterically Stabilized ColloidsUlrike Genz, Bruno D'Aguanno, Jan Mewis, and Rudolf KleinCite this: Langmuir 1994, 10, 7, 2206–2212Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Published inissue 1 July 1994https://pubs.acs.org/…
Abstract Two cylinder‐forming polystyrene‐ block ‐polybutadiene block copolymers of type A‐B with antisymmetric composition (polymer P1 with A : B = 3 : 1 (w/w) and polymer P2 with A : B = 1 : 3 (w/w)) and their binary mixture were studied by small‐angle X‐ray scattering (SAXS) and transmission electron microscopy (TE…
The frequencies of transverse-optical \ensuremath{\Gamma} phonons in ${\mathrm{KNbO}}_{3}$ and ${\mathrm{KTaO}}_{3}$ are calculated in the frozen-phonon scheme making use of the full-potential linearized muffin-tin orbital method. The calculated frequencies in the cubic phase of ${\mathrm{KNbO}}_{3}$ and in the tetrag…
Angle-resolved photoemission from both (100) and (111) oriented, natural type IIb diamond was used to study the electronic structure of diamond. A negative electron affinity (NEA) was found on the 2×1 reconstructed diamond (100) surface. Photoemission spectra of NEA surfaces exhibit a distinctive peak due to emission…
Abstract Microphase separation in solutions of weakly charged polyelectrolytes in poor solvents is studied in the weak segregation limit within the framework of the mean field approximation using a method first developed by Leibler. As a result a complete phase diagram of the solution near the critical point is obtain…
The effect of 15 vol% particulate diamond reinforcement on the thermal conductivity of a cordierite matrix was studied as a function of diamond particle size from room temperature to 700°C. The thermal conductivity was found to increase with increasing particle size to a maximum increase of about 75% for a mean partic…