Khalil Faghihi、Khosrow Zamani、Azzizullah Mirsamie 等 4 位作者2003-11-13Journal of Applied Polymer Science
Abstract Pyromellitic dianhydride (1,2,4,5‐benzenetetracarboxylic acid 1,2,4,5‐dianhydide) (1) was reacted with L‐phenylalanine (2) in a mixture of acetic acid and pyridine (3 : 2) at room temperature, then was refluxed at 90–100°C and N,N ′‐(Pyromellitoyl)‐bis‐ L ‐phenylalanine diacid (3) was obtained in quantitative…
Chemical Synthesis and ReactionsSynthesis and properties of polymersMicrowave-Assisted Synthesis and Applications
Badri P. Maliwal、Joanna Malicka、Ignacy Gryczyński 等 5 位作者2003-11-13Biopolymers
The fluorescence properties of a monolayer of labeled avidin molecules were studied near silver island films. We first adsorbed a monolayer of biotinylated-BSA as a base that was used to capture labeled avidin molecules. For labeled avidin on silver island films, we observed an increase of the fluorescence intensity o…
Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesMolecular Junctions and Nanostructures
Lionel Montagne、Sylvie Daviero‐Minaud、G. Palavit 等 5 位作者2003-11-13Chemistry of Materials
This paper reports a structural study of the effect of TiO 2 substitution for Bi 2 O 3 in x Na 2 O− x P 2 O 5 − y Bi 2 O 3 − z TiO 2 glasses, which were formulated in order to keep a constant average polymerization of the phosphate network. XANES and EXAFS analyses have indicated that the bismuth coordination sphere i…
Glass properties and applicationsAdvanced Condensed Matter PhysicsAdvanced NMR Techniques and Applications
Ryuji Tamura、Keiichi Edagawa、C. Aoki 等 5 位作者2003-11-13Physical review. B, Condensed matter
Electron and x-ray-diffraction studies have revealed that a ${\mathrm{Cd}}_{6}\mathrm{Y}$ 1/1 crystalline approximant $(Im3\ifmmode\bar\else\textasciimacron\fi{},$ $a=1.5482\mathrm{nm})$ undergoes a phase transition at some temperature around 160 K. The transition accompanies a change of the lattice period as well as…
Crystallography and molecular interactionsQuasicrystal Structures and PropertiesX-ray Diffraction in Crystallography
Loren Rieth、Paul H. Holloway2003-11-13Journal of Vacuum Science & Technology A Vacuum Surfaces and Films
The influence of negative ion resputtering (NIR) by oxygen ions during sputter deposition of aluminum doped zinc oxide (ZnO:Al) thin films is investigated. A planar rf diode sputter deposition source with a ceramic ZnO:Al2O3 (98 wt %:2 wt %) target is used for deposition at 250, 500 and 1000 W. The resulting thin film…
ZnO doping and propertiesGas Sensing Nanomaterials and SensorsGa2O3 and related materials
Weizhong Chen、Tong Ren2003-11-13Inorganic Chemistry
Metathesis reactions between Ru(2)(DMBA)(4)Cl(2) (DMBA = N,N'-dimethylbenzamidinate) and MX (M = Na and K) yielded bis-adduct derivatives Ru(2)(DMBA)(4)X(2) (X = CN (1), N(3) (2), N(CN)(2) (3)). Metathesis reactions between Ru(2)(DMBA)(4)(NO(3))(2) and KI resulted in Ru(2)(DMBA)(4)I(2) (4). Compound 1 is diamagnetic,…
Metal complexes synthesis and propertiesSupramolecular Chemistry and ComplexesMagnetism in coordination complexes
Maria Alice Martins、L. H. C. Mattoso2003-11-13Journal of Applied Polymer Science
Abstract The world tendency toward using recycled materials demands new products from vegetable resources and waste polymers. In this work, composites made from powdered tire rubber (average particle size: 320 μm) and sisal fiber were prepared by hot‐press molding and investigated by means of dynamic mechanical therma…
Polymer Nanocomposites and PropertiesNatural Fiber Reinforced CompositesTribology and Wear Analysis
J. Léopoldès、Claire Barrès、Jean L. Leblanc 等 4 位作者2003-11-13Journal of Applied Polymer Science
Abstract The specific role of filler–rubber interactions in dynamic properties was investigated. Natural rubber compounds, filled with N330 carbon black, were used, and the filler surface was modified through a gas treatment in the solid phase. The effects of this filler surface treatment on the dynamic properties wer…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesPolymer composites and self-healing
R. Prozorov、Alexey Snezhko、T. He 等 4 位作者2003-11-13Physical review. B, Condensed matter
The London penetration depth $\ensuremath{\lambda}(T)$ was measured in polycrystalline powders of the nonoxide perovskite superconductor ${\mathrm{MgCNi}}_{3}$ by using a sensitive tunnel-diode resonator technique. The penetration depth exhibits distinctly non $s$-wave BCS low-temperature behavior, instead showing qua…
Physics of Superconductivity and MagnetismMagnetic and transport properties of perovskites and related materialsThermal Expansion and Ionic Conductivity
S. N. Maiti、R. Subbarao、Mohd. Nordin Ibrahim2003-11-13Journal of Applied Polymer Science
Abstract The effects of wood fibers on the melt rheological behavior of isotactic poly(propylene) (i‐PP)/wood fiber (WF) composites have been studied at WF concentrations of 0–32.2 vol % at 493 K. Shear stress–shear rate variations obeyed a power law equation, and the composites exhibited shear thinning, which increas…
Polymer crystallization and propertiesNatural Fiber Reinforced CompositesAdvanced Cellulose Research Studies
J. López、Rafael Balart、Alfonso Jiménez2003-11-13Journal of Applied Polymer Science
Abstract The influence of the crystalline areas observed in poly(vinyl chloride) (PVC) the mechanical and thermal properties of PVC plastisols was studied. Several industrial‐degree PVC resins were used to obtain a broad range of molecular weights and processing conditions for PVC plastisols. The gelation process was…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesPolymer Science and PVC
Chengzhi Chuai、Kristoffer Almdal、Jørgen Lyngaae‐Jørgensen2003-11-13Journal of Applied Polymer Science
Abstract The thermal behavior and properties of immiscible blends of polystyrene (PS) and poly(methyl methacrylate) (PMMA) with and without PS‐ b ‐PMMA diblock copolymer at different melt blending times were investigated by use of a differential scanning calorimeter. The weight fraction of PS in the blends ranged from…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Supawan Tantayanon、Sukunya Juikham2003-11-13Journal of Applied Polymer Science
Abstract The dynamic vulcanization of reclaimed‐tire rubber (RTR) and homopolypropylene (PP) was performed by melt‐mixing using either a sulfur crosslinking agent, maleic anhydride (MA), dicumyl peroxide (DCP), or the combination of MA and DCP, in two consecutive machines, first a two‐roll mill and then a counterrotat…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Gangjian Guo、Ghaus Rizvi、Chul B. Park 等 4 位作者2003-11-13Journal of Applied Polymer Science
Abstract The main benefits of incorporating wood fibers (WF) in plastics are the increased stiffness and lowered cost of the resulting composites. However, these improvements are usually accompanied by a reduction in the ductility and impact resistance. These shortcomings can be removed by effectively foaming and inco…
Natural Fiber Reinforced CompositesCellular and Composite StructuresPolymer Foaming and Composites
Wei‐Qiang Han、Richard L. Brutchey、T. Don Tilley 等 4 位作者2003-11-13Nano Letters
An activated carbon template substitution reaction has been used to synthesize activated boron nitride (BN). The resulting material is characterized by scanning electron microscopy, high-resolution transmission electron microscopy, electron energy loss spectroscopy, and surface area analysis. The activated BN microstr…
Graphene research and applicationsBoron and Carbon Nanomaterials ResearchMXene and MAX Phase Materials
Linda S. Shimizu、Andrew D. Hughes、Mark D. Smith 等 7 位作者2003-11-13Journal of the American Chemical Society
A large bis-urea macrocycle was synthesized and assembled into columnar nanotubes containing a sizable cavity. This purely organic nanotube is held together primarily by hydrogen bonding and yet shows remarkable thermal stability up to 180 degrees C in the presence and absence of acetic acid guest. This enables the na…
Metal-Organic Frameworks: Synthesis and ApplicationsSupramolecular Self-Assembly in MaterialsCovalent Organic Framework Applications
Michael A. Henderson、John White、Hiroshi Uetsuka 等 4 位作者2003-11-13Journal of the American Chemical Society
Identification of charge transfer and trapping sites on semiconducting oxide surfaces is of fundamental importance in furthering the field of heterogeneous photocatalysts. Using scanning tunneling microscopy, electron energy loss spectroscopy, and photodesorption, we observed both electron trapping and hole transfer e…
TiO2 Photocatalysis and Solar CellsMolecular Junctions and NanostructuresElectronic and Structural Properties of Oxides
P. Karmakar、D. Ghose2003-11-13arXiv
We have observed the formation of ripples in a number of thin metal films, e.g. Au, Pt, Ag, Cu and Co under Ar^{+} ion beam sputtering at grazing incidence. The structures are found to be quite stable under ambient conditions. The results show that the ripple formation in polycrystalline metallic films relies on the e…
Materials Science
I. V. Solovyev、N. Hamada、K. Terakura2003-11-13arXiv
Using results of the band structure calculations in the local-spin-density approximation we demonstrate how the crystal distortions affect the magnetic structure of orthorhombically distorted perovskites leading to a non-collinear spin arrangement. Our results suggest that the non-collinearity of the spin magnetic mom…
Materials ScienceStrongly Correlated Electrons
I. V. Solovyev2003-11-13arXiv
It is argued that the non-collinear orbital magnetism accompanying the orthorhombic distortion is an important ingredient which should be taken into consideration for making promising materials with the best magneto-optical characteristics on the basis of SrRuO$_3$.
Materials ScienceStrongly Correlated Electrons