Eliza Hutter、János H. Fendler2002-01-30Chemical Communications
Mixing aqueous dispersions of thiocyanate ion coated small (< 3.5 nm diameter) gold nanoparticles and EDTA covered larger (> 22 nm diameter) silver nanoparticles, results in the formation of robust gold encased silver nanoparticles; in contrast to using larger (> 11 nm diameter) gold nanoparticles which forms chained…
Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesNanocluster Synthesis and Applications
Adam S. Zerda、Alan J. Lesser2002-01-30Journal of Applied Polymer Science
Abstract Amine‐cured epoxy resins are prepared containing an aliphatic phosphonate additive which aids in the processing of the epoxy by reducing the viscosity of the resin mixture. The additive also acts as an antiplasticizer in the cured epoxy by increasing the modulus and yield strength under uniaxial tension and c…
Mechanical Behavior of CompositesFlame retardant materials and propertiesFiber-reinforced polymer composites
Yu Chen、William T. A. Harrison、Corrie T. Imrie 等 4 位作者2002-01-30Journal of Materials Chemistry
Here we discuss the thermotropic and electrochemical properties and polymerisation of a series of N-substituted pyrrole monomers bearing mesogenic 4-substituted azobenzene attached as a pendant group via alkyl spacers. We discuss the effect upon these molecular properties of chain length and substitution of the azoben…
Liquid Crystal Research AdvancementsConducting polymers and applicationsPorphyrin and Phthalocyanine Chemistry
Amy T. Kan、Gongmin Fu、M. A. Watson 等 4 位作者2002-01-30OpenAlex
Abstract The effect of hydrate inhibitors on oilfield scale formation has been studied. A self-consistent activity model is presented to model the effect of methanol on carbonate equilibrium, calcite, barite, gypsum, celestite, and halite solubility in a gas/methanol/water/salt solution. The model uses Pitzer theory t…
Calcium Carbonate Crystallization and Inhibition
Gert Dantlgraber、Dong Shen、Siegmar Diele 等 4 位作者2002-01-30Chemistry of Materials
A new series of liquid-crystalline bent-core molecules comprising a central 3,4‘-disubstituted biphenyl unit (biphenyl 3,4‘-bis-4-[4-dodecyl(oxy)benzoyloxy]benzoates) at which one, two, or even three H atoms in various positions were replaced by F atoms has been synthesized. The biphenyl cores were built up by orthome…
Liquid Crystal Research AdvancementsSynthesis and Properties of Aromatic CompoundsMolecular spectroscopy and chirality
Cristiana Di Valentin、Gianfranco Pacchioni、Mario Chiesa 等 6 位作者2002-01-30The Journal of Physical Chemistry B
The interaction of nitric oxide with the surface of MgO at low temperature has been studied experimentally and theoretically. High-surface-area polycrystalline MgO prepared by chemical vapor deposition has been exposed to both 14 NO and 15 NO and the corresponding adsorption complexes have been monitored by means of e…
Advanced Chemical Physics StudiesHigh-pressure geophysics and materialsMagnesium Oxide Properties and Applications
Stefan Ludwig、C. Enss、Peter Strehlow 等 4 位作者2002-01-30Physical Review Letters
We report on investigations of spontaneous polarization echoes in the nonmagnetic multicomponent glass BaO-Al2O3-SiO2 in static magnetic fields. While the echo decay is only marginally influenced, the echo amplitude depends strongly on magnetic fields. It seems that the intrinsic magnetic moment of tunneling systems c…
Glass properties and applicationsQuantum optics and atomic interactionsEarthquake Detection and Analysis
J. P. Poyet、G. Ségéral、E. D. Toskey2002-01-30OpenAlex
Abstract A new technique is presented to detect scale deposition and to determine its composition and thickness in real-time in oilfield tubing and pipe. The method is based on continuous triple energy gamma-ray attenuation measurements made at a dedicated, instrumented mandrel or spool piece. Detection and identifica…
Drilling and Well EngineeringCalcium Carbonate Crystallization and InhibitionNuclear Physics and Applications
Thomas Blasiak、Semyon L. Zheleznyak2002-01-30Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE
Today's large aperture telescopes have created a demand for diffraction gratings that are larger than the capabilities of the largest ruling engines. To overcome this obstacle, a method to produce a stable and passive assembly of two or more gratings is required. Replicated monolithic mosaics are produced by the simul…
Photonic and Optical DevicesAdvanced optical system designOptical Coatings and Gratings
U. Dileep、Shanti A. Avirah2002-01-30Journal of Applied Polymer Science
Abstract Maleic anhydride was chemically attached to depolymerized natural rubber by a photochemical reaction. The product Carboxy Terminated Liquid Natural Rubber (CTNR) was characterized by 1 H‐NMR, IR, GPC, and TGA. The efficiency and permanence of CTNR were compared with conventional plasticizers in NBR vulcanizat…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Samuel C. Barden、James A. Arns、W. S. Colburn 等 4 位作者2002-01-30Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE
An overview of the measured performance for a variety of volume-phase holographic (VPH) gratings is presented. Many of the gratings analyzed were developed as part of a National Science Foundation funded effort to explore the viability of this technology for astronomical applications. Additional emphasis is given to s…
Adaptive optics and wavefront sensingAdvanced Measurement and Metrology TechniquesOptical Coatings and Gratings
I. R. Collins、J. A. Hewartson2002-01-30OpenAlex
Abstract As the industry moves towards increasing deepwater production, the very high cost of well intervention places large constraints upon the performance of scale control options. In particular, where scale is managed by squeeze treating, it is an absolute requirement that the treatment lasts as long as possible a…
Enhanced Oil Recovery TechniquesDrilling and Well EngineeringCalcium Carbonate Crystallization and Inhibition
Patit Paban Kundu、Tejas Kukreja2002-01-30Journal of Applied Polymer Science
Abstract Plasticizer (vegetable or parafinic oil) pretreated carbon black is mixed with rubber for its compounding. It is observed that the extent of cure obtained from rheometric torque decreases linearly with an increase in vegetable oil content. The presence of a coupling action and a monolayer (microplasticization…
Polymer Nanocomposites and PropertiesLubricants and Their AdditivesTribology and Wear Analysis
Gennadi G. Nossarev、Thieo E. Hogen‐Esch2002-01-30Macromolecules
The first synthesis of well-defined narrow molecular weight (MW) distribution macrocyclic poly(2-vinylnaphthalene) (P2VN) containing a single 1,4-benzylidene or 9,10-anthracenylidene unit is reported. The synthesis involves the potassium naphthalide (K-Naph) or potassium 1,1,4,4,7,7,10,10-octamethyl-1,2,3,4,7,8,9,10-o…
Synthesis and Properties of Aromatic CompoundsSynthetic Organic Chemistry MethodsSynthesis and properties of polymers
Miroslav Chlebík、Bernd Kirchheim2002-01-30Journal für die reine und angewandte Mathematik (Crelles Journal)
We prove a general rigidity result for the maximal possible number of gradients by showing that any lipschitz function using four pairwise not rank-one connected gradients is necessarily affine. This exhibits an interesting difference between rigidity features of approximate and exact solutions of differential inclusi…
Shape Memory Alloy TransformationsTopology Optimization in EngineeringAdvanced Mathematical Modeling in Engineering
Christopher J. Chang、Chen‐Yu Yeh、Daniel G. Nocera2002-01-30The Journal of Organic Chemistry
A modular synthetic strategy for the construction of cofacial porphyrin architectures bearing hydrogen-bond synthons on a xanthene platform is presented. The convergent approach is based on a xanthene aldehyde-ester building block that is easily obtainable on a multigram scale with minimal purification. Treatment of t…
Supramolecular Chemistry and ComplexesPorphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation Mechanisms
Riikka L. Puurunen、Andrew Root、P. Sarv 等 7 位作者2002-01-30Chemistry of Materials
Aluminum nitride-type species were prepared on porous alumina and silica by repeated separate, saturated reactions of gaseous trimethylaluminum (TMA) and ammonia with solid substrates. Reaction cycles of TMA at 423 K and ammonia at 823 K were performed up to six times. Growth per cycle was on average 2.4 AlN units/nm…
Advanced ceramic materials synthesisSemiconductor materials and devicesAcoustic Wave Resonator Technologies
Alexandre Goldszal、Christian Hurtevent、Guy Rousseau2002-01-30OpenAlex
Abstract Many of the fields that have been discovered recently in the West African deep-offshore will produce acidic crudes associated with gas containing a high concentration of CO2. During the oil production process, a pH increase due to decompression and carbon dioxide degassing may generate surface-active naphthen…
Hydraulic Fracturing and Reservoir AnalysisDrilling and Well EngineeringCalcium Carbonate Crystallization and Inhibition
Michel Meyer、A. Fischer、H. Hoffmann2002-01-30The Journal of Physical Chemistry B
Silica gels usually show the phenomena of syneresis. The gels shrink with time after preparation. This process is also observed with the gels that are prepared with the new Si precursor silicic acid tetrakis(2-hydroxyethyl) ester. It is shown that the shrinkage of the gels can be prevented if the cationic precursor N…
Phase Equilibria and ThermodynamicsMesoporous Materials and CatalysisAerogels and thermal insulation
Akira Baba、Rigoberto C. Advíncula、Wolfgang Knoll2002-01-30The Journal of Physical Chemistry B
The combination of in situ surface plasmon resonance spectroscopy (SPS) and surface plasmon field-enhanced light scattering (SPLS) with an electrochemical method was used to simultaneously investigate the optical and electrochemical properties of polyaniline films on a planar gold electrode. First, the electropolymeri…
Electrochemical sensors and biosensorsConducting polymers and applicationsAnalytical Chemistry and Sensors