Materials Literature
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Abstract SnO2 showed catalytic activity for the selective reduction of NO with hydrocarbons (C2H4, C3H8, and CH4) in the presence of excess oxygen, and the activity was not so much decreased even after heat treatments in dry air at 900 °C as well as in humid air at 800 °C. These results show that SnO2 is an active and…
Vertex-sharing tetrahedral ZnO4 and triangular BO3 subunits form a three-dimensional network of intersecting channels in Zn4O(BO3)2 a new molecular sieve not belonging to the aluminosilicates. The ab initio structure determination was possible with X-ray powder data; the picture on the right shows the view along [100].
The early stages of Pt electrodeposition (0.675-0.620 V vs RHE) on highly oriented pyrolytic graphite (HOPG) from chloroplatinic acid at 25 °C have been studied by ex-situ STM and SEM imaging complemented with electrochemical data. Nucleation and 3D growth of Pt initiate at HOPG surface defects. Large Pt agglomerates…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of cationic metalloporphyrin precursors related to the design of DNA cleaversChristiane Casas, Bernadette Saint-Jalmes, Christophe Loup, C. Jeffrey Lacey, and Bernard MeunierCite this: J. Org. Chem. 1993, 58, 10, 2913–2917Publication Date (Print):May 1, 1993Publica…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of nanophase Group 6 metal (M) and metal carbide (M2C) powders by chemical reduction methodsD. Zeng and M. J. Hampden-SmithCite this: Chem. Mater. 1993, 5, 5, 681–689Publication Date (Print):May 1, 1993Publication History Published online1 May…
It is shown on a specific example that fractal boundary conditions drastically alter the properties of wave excitations in space. The low-frequency part of the vibration spectrum of a finite-range fractal drum is computed using an analogy between the Helmoltz equation and the diffusion equation. The irregularity of th…
Trapping effects of dopant ions on the chemical diffusion due to valence changes of the impurity ions (association with electronic charge carriers) and/or due to association with ionic defects are considered. It is shown that the chemical or ambipolar diffusion coefficient may be substantially changed and may even be…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTControlled aggregation and deaggregation of a polynuclear oxido-bridged manganese complex: utility to synthesis of the Jahn-Teller effect in high-spin manganese(III)Eduardo Libby, Kirsten Folting, Carolyn J. Huffman, John C. Huffman, and George ChristouCite this: Inorg. Chem…
ADVERTISEMENT RETURN TO ISSUEPREVArticleInitiation of aggregation in colloidal particle monolayersD. J. Robinson and J. C. EarnshawCite this: Langmuir 1993, 9, 5, 1436–1438Publication Date (Print):May 1, 1993Publication History Published online1 May 2002Published inissue 1 May 1993https://pubs.acs.org/doi/10.1021/la00…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDesign of novel electroactive polybithiophene derivativesKarim Faid, Renee Cloutier, and Mario LeclercCite this: Macromolecules 1993, 26, 10, 2501–2507Publication Date (Print):May 1, 1993Publication History Published online1 May 2002Published inissue 1 May 1993https://pubs.a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpin density maps in nitroxide-copper(II) complexes. A polarized neutron diffraction determinationEric Ressouche, Jean Xavier Boucherle, Beatrice Gillon, Paul Rey, and Jacques SchweizerCite this: J. Am. Chem. Soc. 1993, 115, 9, 3610–3617Publication Date (Print):May 1, 1993Pu…
Impact and Auger excitation of threefold ionized rare earth ions by carriers are calculated for silicon and III-V semiconductors. The interaction between strongly localized f-electrons and local vibrations, which makes it possible to achieve energy balance in Auger processes, has been taken into account. It is shown t…
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew dinuclear penta- and hexacoordinated nickel(II) complexes with .mu.-azido bridges. Crystal structures of ferromagnetically coupled (.mu.-N3)2[Ni(Me3[12]N3)]2(ClO4)2.cntdot.2H2O and (.mu.-N3)2[Ni(232-N4)]2(ClO4)2Ramon Vicente, Albert Escuer, Joan Ribas, M. Salah el Fallah…
Deoxyoligonucleotide 49-mers containing a central cis-syn, trans-syn-I, (6-4), or Dewar photoproduct of TpT were constructed for use in repair and replication studies by ligation of shorter photoproduct-containing oligonucleotides. A (6-4) product-containing 6-mer was prepared in 3.4% yield by 254 nm irradiation of d(…
For stratified samples where material is being uniformly deposited or removed at a known rate, I show that the dielectric function ∊o of the outermost region is determinable exactly and analytically at any given wavelength from the value and the thickness derivative of the complex reflectances for p-polarized, s-polar…
The plausibility of the entropic repulsion of electrical double layers acting to stabilize an equilibrium thickness of intergranular glass films in polycrystalline ceramics is explored. Estimates of the screening length, surface potential, and surface charge required to provide a repulsive force sufficiently large to…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheory of polypentagonsS. J. Cyvin, B. N. Cyvin, J. Brunvoll, E. Brendsdal, Zhang Fuji, Guo Xiaofeng, and R. TosicCite this: J. Chem. Inf. Comput. Sci. 1993, 33, 3, 466–474Publication Date (Print):May 1, 1993Publication History Published online1 May 2002Published inissue 1 M…
Abstract The thermoluminescence dose response of a-Al2O3:C at ultra-low dose levels (100 nGy - 100 µGy) has been measured. It has been shown that computerised glow curve deconvolution (CGCD) can be applied to the glow curve of a-Al2O3:C using two Gaussian peak shape functions, to fit the main peak, superimposed on a l…
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