High Resolution Deposition of Silver in Nafion Films with the Scanning Tunneling Microscope
Abstract not Available.
Materials Literature
文献浏览
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Ultra-low-noise cryogenic high-electron-mobility transistors
Quarter-micrometer gate-length high-electron-mobility transistors (HEMTs) for cryogenic low-noise application with very low light sensitivity have been developed. At room temperature, these exhibit a noise figure of 0.4 dB with associated gain of 15 dB at 8 GHz. At a temperature of 12.5 K the minimum noise temperature…
Magnetic and spectroscopic characterization of an iron porphyrin peroxide complex. Peroxoferrioctaethylporphyrin(1-)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic and spectroscopic characterization of an iron porphyrin peroxide complex. Peroxoferrioctaethylporphyrin(1-)Judith N. Burstyn, James A. Roe, Andrew R. Miksztal, Ben A. Shaevitz, George. Lang, and Joan Selverstone. ValentineCite this: J. Am. Chem. Soc. 1988, 110, 5, 1…
Aldol Condensation Reaction between Formaldehyde and Acetone over Heat-Treated Synthetic Hydrotalcite and Hydrotalcite-Like Compounds
Abstract Synthetic hydrotalcite, Mg6Al2(OH)16CO3·4H2O, and its analogues were synthesized, heat-treated at 773 K, and used as catalysts for the title reaction to form methyl vinyl ketone (MVK) at 673 K. MVK was formed over all the catalysts examined, the highest MVK yield (20% on acetone basis) being found over the he…
Structural characterization by EXAFS spectroscopy of the binuclear iron center in protein A of methane monooxygenase from Methylococcus capsulatus (Bath)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural characterization by EXAFS spectroscopy of the binuclear iron center in protein A of methane monooxygenase from Methylococcus capsulatus (Bath)Agneta. Ericson, Britt. Hedman, Keith O. Hodgson, Jeffrey. Green, Howard. Dalton, James G. Bentsen, Robert H. Beer, and St…
Crystal Structures of Organic Superconductor, (BEDT-TTF)2Cu(NCS)2, at 298 K and 104 K
Abstract The crystal structures of an organic superconductor (BEDT-TTF)2Cu(NCS)2 (Tc=10.4 K) at 298 K and 104 K are determined by X-ray analysis. The packing pattern of donors is nearly analogous to κ-(BEDT-TTF)2I3. The counter anion, Cu(NCS)2−, has no positional disorder and constructs a peculiar sheet where a copper…
Collagen expression, ultrastructural assembly, and mineralization in cultures of chicken embryo osteoblasts.
A newly defined chick calvariae osteoblast culture system that undergoes a temporal sequence of differentiation of the osteoblast phenotype with subsequent mineralization (Gerstenfeld, L. C., S. Chipman, J. Glowacki, and J. B. Lian. 1987. Dev. Biol. 122:49-60) has been examined for the regulation of collagen synthesis…
Molecular and macromolecular nonlinear optical materials. Probing architecture/electronic structure/frequency doubling relationships via an SCF-LCAO MECI .pi. electron formalism
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular and macromolecular nonlinear optical materials. Probing architecture/electronic structure/frequency doubling relationships via an SCF-LCAO MECI .pi. electron formalismDe Quan. Li, Mark A. Ratner, and Tobin J. MarksCite this: J. Am. Chem. Soc. 1988, 110, 6, 1707–171…
Diamond crystal growth by plasma chemical vapor deposition
We have grown diamond crystals and polycrystalline diamond films from CH4/H2/O2 gas feeds in a simple, high-power density, 2450-MHz discharge tube reactor. Single-crystal growth rates over 20 μm/h have been achieved. The material has been analyzed using Raman spectroscopy, Auger spectroscopy, and x-ray diffraction. Co…
Trends and Highlights in Polymer Processing 1938 to 1988**
Abstract An attempt is made to give a survey of polymer processing during the past 50 years, with a backward glance to earlier periods and to roots of development in related branches of industrial production. Selected topics are treated in some detail, with comments and comparisons, showing typical trends and forecast…
Stress relaxation and the domain structure of thermoplastic elastomer
Abstract The relationship between the stress relaxation phenomena and domain structure of thermoplastic elastomer (TPE) was studied. Two representative thermoplastic elastomers: styrenebutadiene‐styrene block copolymer (SBS) and 1,2‐syndiotactic polybutadiene (1,2‐PB), representing the amorphous glassy domain and crys…
Temperature Dependence of Two‐Dimensional Optical Energy Gap for Germanium Selenide Single Crystals
Abstract The interband absorption coefficient of GeSe single crystals near the fundamental absorption edge is analyzed on the basis of a two‐dimensional model and is found to correspond to an indirect forbidden transition. The optical energy gap at room temperature is found to be (1.066 ± 0.011) and (1.078 ± 0.010) eV…
Ring dynamics in a crystalline analog of bisphenol A polycarbonate
ADVERTISEMENT RETURN TO ISSUEPREVArticleRing dynamics in a crystalline analog of bisphenol A polycarbonateP. Mark Henrichs and Henry R. LussCite this: Macromolecules 1988, 21, 3, 860–862Publication Date (Print):March 1, 1988Publication History Published online1 May 2002Published inissue 1 March 1988https://pubs.acs.or…
Numerical Methods for the Determination of the Polarization Resistance in Corrosion Rate Monitoring and Inhibitor Testing
The concept of polarization resistance is introduced, considering a real current-voltage characteristic of the electrochemical system. Then some mathematical methods, developed by the author and not currently available in literature, are discussed, which allow its evaluation. The numerical methods considered are linea…
Layer Charge of Smectites in an Argialboll‐Argiaquoll Sequence
Abstract Soil samples were collected by horizon from three pedons that formed an Argialboll‐Argiaquoll sequence. The soil samples were mechanically dispersed in distilled water and samples of the clay fraction were separated by sedimentation. Portions of these clay samples were given various standard pretreatments and…
Effect of Zr additions on the microstructural and magnetic properties of NdFeB based magnets
The microstructure of a sintered magnet made from Zr-containing NdFeB material was investigated using optical microscopy and scanning and transmission electron microscopy. The authors observed three phases in addition to those found in the ternary alloy. Two of these phases were Zr-rich, one having a lamellar structur…
Intrachain rotations in the poly(ester carbonates). 2. Quantum-mechanical calculations on large model molecules fully representing each type of phenyl ring environment
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntrachain rotations in the poly(ester carbonates). 2. Quantum-mechanical calculations on large model molecules fully representing each type of phenyl ring environmentJozef Bicerano and Hayden A. ClarkCite this: Macromolecules 1988, 21, 3, 597–603Publication Date (Print):Mar…
Alumina-Anchored Cobalt Porphine Catalysts for the Conversion of Quadricyclane to Norbornadiene
Abstract Methods are described for the preparation of cobalt(II) deuteroporphyrin and cobalt(II) tetrakis(p-sulfonatophenyl)porphine anchored on alumina beads coated with polyaminesulfone-A. Wavelength dispersive X-ray microanalysis showed that the cobalt(II) porphine distributes within the catalyst outer surface laye…
Structural phase transitions in Rb3H(SeO4)2 single crystals
It is well known that Rb3H(SeO4)2 experiences two reversible phase transitions I↔II (at 606 K) and II↔III (at 448.5 K) /1,2/.
Durability of Firefighters' Protective Clothing to Heat and Light
Fabrics used in firefighters' protective clothing were exposed to simulated sunlight from a xenon are Weather-Ometer and heat in a forced air circulating oven, and the resulting changes in properties were measured (color, tearing strength, flame resistance and thermal protective performance). The thermal shrinkage and…