Materials Literature
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The effect of /sup 60/Co radiation on the leakage current behavior of hydrogenated amorphous silicon photodiode sensors has been investigated. These sensors, with an n-i-p construction, are identical to those used on two-dimensional, pixelated imaging arrays currently under development. Sensor leakage current is repor…
Epitaxial p-type Schottky diodes have been fabricated on p/sup +/-substrate. While the activation energy of the epitaxial layer conductivity is 390 meV, that of the substrate is only 50 meV. At forward bias the substrate conductivity dominates above 150/spl deg/C, leading for a 5/spl times/10/sup -5/ cm/sup 2/ area co…
Abstract The interaction energies between PS, Pα‐MS, and PMMA with several bisphenol‐A‐based polycarbonates were quantitatively determined from oligomer/oligomer, oligomer/homopolymer, and homopolymer/copolymer blends. Interaction energies were calculated from the Flory‐Huggins theory and the Sanchez‐Lacombe equation…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTToward New Magnetic, Electronic, and Optical Materials: Synthesis and Characterization of New Bimetallic Tetrathiafulvalene Tetrathiolate Building BlocksRichard D. McCullough and John A. BelotCite this: Chem. Mater. 1994, 6, 8, 1396–1403Publication Date (Print):August 1, 199…
It is shown that the introduction of a porous structure into single-crystal Si produces substantial changes in the photoelectronic properties. The porous Si (PS) layer is formed by anodization of p-type Si wafers in a HF solution. The photoconduction cells used in this study consists of a semitransparent thin Au film,…
Several aluminum oxides (α‐Al 2 O 3 , θ‐Al 2 O 3 , and AIOOH) were examined to study the differences in reaction behavior and powder characteristics during carbothermal nitrida‐tion to AIN using sucrose and carbon black. The reaction conditions investigated were carbon‐to‐alumina ratio, reaction temperature, and time.…
Phosphate sorption by the surface horizon of 228 acid to neutral Western Australian (W.A.) soils is more closely related (r(2) = 0.76) to the content of oxalate-extractable aluminium than to any other soil constituent. This fraction corresponds to poorly ordered inorganic and organic Al compounds that release consider…
Cummins and collaborators [Phys. Rev. A 46, 3343 (1992)] have interpreted their recent dynamic light-scattering data on supercooled liquid Salol in terms of mode-coupling theory. They asserted that critical slowing down occurs at a temperature ${\mathit{T}}_{\mathit{c}}$ which is much above ${\mathit{T}}_{0}$ where ex…
Adenylate kinase from Bacillus subtilis, like the enzyme from Bacillus stearothermophilus, contains a structural zinc atom. Cys153 in the enzyme from B. stearothermophilus, which is involved in the zinc coordination, is replaced in the adenylate kinase from B. subtilis by an aspartic acid residue. Therefore, we were i…
A new method is developed for calculating the correlation function of the random deformation in heteroepitaxic layers and superlattices from measurements of iso-intensity contours of diffuse X-ray scattering. The method is based on the optical coherence approach and kinematical diffraction theory. Structural models ha…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSide-Chain Liquid Crystalline Ionomers. 1. Preparation through Alkaline Hydrolysis and CharacterizationYue Zhao and Huanli LeiCite this: Macromolecules 1994, 27, 16, 4525–4529Publication Date (Print):August 1, 1994Publication History Published online1 May 2002Published iniss…
We propose a new synthetic method for the preparation of PcLuNPc. The electrochemical and electrical properties of thin films of this compound show it is a new molecular semiconductor.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism of Growth of Silica Monolayer and Generation of Acidity by Chemical Vapor Deposition of Tetramethoxysilane on AluminaNaonobu Katada, Takuya Toyama, and Miki NiwaCite this: J. Phys. Chem. 1994, 98, 31, 7647–7652Publication Date (Print):August 1, 1994Publication Hist…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGround-State Guest-Host Chemistry in the Hydrophobic Cavity of the Unsaturated Cyclic Pd3(dppm)3CO2+ ClusterRejean Provencher, Khin T. Aye, Marc Drouin, Jonathan Gagnon, Nicolas Boudreault, and Pierre D. HarveyCite this: Inorg. Chem. 1994, 33, 17, 3689–3699Publication Date (…
Total sulfur has been measured in 13 petroleum and 14 coal Standard Reference Materials (SRMs) by isotope dilution thermal ionization mass spectrometry. These materials are suitable as primary and quality control standards for determining the sulfur content of oils and coals by X-ray fluorescence and high-temperature…
The effect of counterion on the structure of several anionic metal-chalcogenide complexes is discussed. Examples of compounds which show these dramatic effects are presented and some conclusions are made regarding our ability to predict the dimensionality of a structure.
The heme iron in cytochrome c-550 from Thiobacillus versutus has a methionine and a histidine as axial ligands. In order to study the characteristics of a possible lysine-histidine ligation in a heme protein, the methionine has been replaced by a lysine. This residue acts as a ligand between pH 3 and 12. The midpoint…
The inhibition of copper (Cu) corrosion in 1.5% sodium chloride (NaCl) solution was studied in the presence of different concentrations of piperidine, piperidine dithiocarbamate, and its Cu(II) complex at 25°C. All three additives were found to be excellent inhibitors of Cu corrosion. The difference in inhibition effi…
The dielectric behavior of the antiferroelectric liquid crystal (R)-1-methyl- heptyl-4-( 4 ′′ -n-dodecyloxybiphenyl- 4 ′ carbonoyloxy)-3-fluorobenzoate was investigated by dielectric spectroscopy. In the antiferroelectric SmC A * phase three dielectric active processes were detected. At least one of them, the process…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Ionic Chain Polydispersity on the Size of Spherical Ionic Microdomains in Diblock IonomersDiep Nguyen, Xing-Fu Zhong, Claudine E. Williams, and Adi EisenbergCite this: Macromolecules 1994, 27, 18, 5173–5181Publication Date (Print):August 1, 1994Publication History…