Materials Literature
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Research Article| January 01, 2002 X-ray Reflectivity as a Probe of Mineral-Fluid Interfaces: A User Guide Paul A. Fenter Paul A. Fenter Environmental Research Division, Argonne National Laboratory, ER-203, Argonne, Illinois, 60439-4843, U.S.A. Search for other works by this author on: GSW Google Scholar Author and Ar…
Large-diameter-sized mesoporous carbon monoliths with bicontinuous cubic structure of Ia3d symmetry have been synthesized by using mesoporous silica monoliths as hard templates; such carbon monoliths show potential application of advanced electrodes and electrochemical double layer capacitors.
In this paper we provide a general formulation for the electromagnetic wave interaction with stratified media and then specialize to slabs of negative isotropic media. The field solutions are obtained in all regions of the stratified medium. The characteristic waves in negative isotropic media are backward waves. We d…
Stealth (pegylated) liposomal doxorubicin (Doxil) has been extensively studied at the pre-clinical and clinical level in recent years. However, one issue not yet addressed is the effect of dose on tumor localization and therapeutic efficacy of Doxil. Although it has been reported that the pharmacokinetics of drug-free…
Effects of counterions and growth methods on polyaniline growth have been studied using the electrochemical quartz crystal microbalance and other related techniques. The results indicate that the polymer growth rates and the morphology of polymer surfaces are very different depending on the electrolytes and growth met…
Polyhydroxyalkanoates (PHAs) are polyoxoesters that are produced by many bacteria and that accumulate as intracellular granules. Phasins (PhaP) are proteins that accumulate during PHA synthesis, bind PHA granules, and promote further PHA synthesis. Interestingly, PhaP accumulation seems to be strictly dependent on PHA…
Although temperature effects on phytoplankton growth and photosynthesis can be clearly demonstrated in the laboratory, their relevance in the field is much harder to establish. Recently, however, it has been recognized that temperature has a significant influence on nitrogen uptake. In particular, temperate marine dia…
Abstract Transition-metal perovskite oxides exhibit a wide range of extraordinary but imperfectly understood phenomena. The best known examples are high-temperature superconductivity in copper oxides1, and colossal magnetoresistance in manganese oxides (‘manganites’)2, 3. All of these materials undergo a range of orde…
Research Article| January 01, 2002 The Crystal Chemistry of the Phosphate Minerals Danielle M.C. Huminicki; Danielle M.C. Huminicki Department of Geological Sciences, University of Manitoba Winnipeg, Manitoba, Canada R3T 2N2 Search for other works by this author on: GSW Google Scholar Frank C. Hawthorne Frank C. Hawth…
We develop a model for the excitation of erbium ions in erbium-doped silicon nanocrystals via coupling from confined excitons generated within the silicon nanoclusters. The model provides a phenomenological picture of the exchange mechanism and allows us to evaluate an effective absorption cross section for erbium of…
Differential scanning calorimetry (DSC), accelerating rate calorimetry (ARC), and X-ray diffraction experiments on the reaction of in various solvents have been performed. In the presence of sufficient solvent the reaction proceeds in a clear stepwise manner through solid phases as a function of temperature as Accompa…
Three cathode compositions and have been tested as solid oxide fuel cell (SOFC) cathodes at operating temperatures from 650 to 750°C. Sintering temperatures were established for each cathode composition to provide optimized cell performance. exhibited the highest power density at 750°C and 0.7 V), and indicated excell…
MODBASE (http://guitar.rockefeller.edu/modbase) is a relational database of annotated comparative protein structure models for all available protein sequences matched to at least one known protein structure. The models are calculated by MODPIPE, an automated modeling pipeline that relies on PSI-BLAST, IMPALA and MODEL…
CdS nanotubes and nanowires have been successfully synthesized via an in situ micelle–template–interface reaction (ISMTIR) route by adjusting the concentration of the surfactant. The whole reaction system is made up of SDS rod-like micelles as the template, CS2 as the oil phase and sulfur source, NH3 as the attacking…
The progression from synthetically achiral ligand and metal ion, to isolated chiral metal complex, to homochiral two-dimensional (2D) assembly layer, and finally to conglomerate is presented. The cobalt(III) complexes of achiral tripod-type ligands involving three imidazole groups with the chemical formulas [Co(H3L6)]…
The measurement results for thin film barium strontium titanate (BST) based voltage tunable capacitors intended for RF applications are reported. At 9 V DC, BST capacitors fabricated using MOCVD (metalorganic chemical vapor deposition) method achieved 71% (3.4:1) tunability. The measured device quality factor (Q) for…
Although the assembly of aluminosilicate foams and large-pore hexagonal mesostructures from zeolite BEA, MFI, and FAU seeds requires a reduction in pH from initially very basic values (pH > 12) to acidic values in the range <2.0−6.5, the protozeolitic nanoclusters persist under these conditions and substantially impro…
In the world of crystal engineering in which the focus of effort is on the assembly of molecular species by crystallisation, surprisingly little attention has been paid to the actual nucleation and crystallisation processes involved. This Highlight explores the structural aspects of the nucleation process in a range o…
Periodic mesoporous benzene-silicas with large pores of 6.0 to 7.4 nm in diameter are synthesized using triblock copolymer as a template. These mesoporous materials have a well-defined hexagonal rod morphology and high thermal stability up to 823 K in air.
▪ Abstract Recent progress in modeling and simulation of the flow of nematic liquid crystals is presented. The Leslie-Ericksen (LE) theory has been successful in elucidating the flow of low molar-mass nematics. The theoretical framework for the flow of polymeric nematic liquid crystals is still evolving; extensions of…