Yangguang Li、Gejihu De、Mei Yuan 等 8 位作者2003-01-10Dalton Transactions
A novel organic–inorganic hybrid compound [Cu(phen)]2[VIVV4VAs2VO19]·0.5H2O 1 has been hydrothermally synthesized. Its structure, determined by single crystal X-ray diffraction, exhibits an unusual two-dimensional arsenic vanadate layered network grafted with the [Cu(phen)]2+ complex. The chelating phen ligands projec…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsVanadium and Halogenation Chemistry
VAN-NHAM PHAN、MINH-TIEN TRAN2003-01-10Modern Physics Letters B
Transport properties of the manganites by the double-exchange mechanism are considered. The system is modeled by a simplified double-exchange model, i.e. the Hund coupling of the itinerant electron spins and local spins is simplified to the Ising-type one. The transport quantities such as the electronic resistivity, t…
Magnetic and transport properties of perovskites and related materialsAdvanced Physical and Chemical Molecular InteractionsChemical and Physical Properties of Materials
Frédéric Tessier、David H. Boal、Dennis E. Discher2003-01-10Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
The elastic properties of planar, C4-symmetric networks under stress and at nonzero temperature are determined by simulation and mean field approximations. Attached at fourfold coordinated junction vertices, the networks are self-avoiding in that their elements (or bonds) may not intersect each other. Two different mo…
Carbon Nanotubes in CompositesCellular and Composite StructuresAdvanced Materials and Mechanics
Genoveva Buelna、Y. S. Lin、Lian X. Liu 等 4 位作者2003-01-10Industrial & Engineering Chemistry Research
Granular γ-Al 2 O 3 support and 8 wt % CuO/γ-Al 2 O 3 catalyst were synthesized by a sol−gel granulation method. The pore structure, crush strength, hardness, and elasticity of these sol−gel-derived catalysts were studied and compared with similar commercial catalysts prepared by non-sol−gel methods. Alumina and CuO-c…
Advanced ceramic materials synthesisCatalytic Processes in Materials ScienceMesoporous Materials and Catalysis
Mehmet Sankır、Zühal Küçükyavuz、Savaş Küçükyavuz2003-01-10Journal of Applied Polymer Science
Abstract The synthesis was performed by the electropolymerization of thiophene on a poly(dimethylsiloxane) (PDMS)‐coated platinum electrode at 2.2 V with tetrabutylammoniumtetrafloroborate (TBAFB) as a supporting electrolyte and with acetonitrile as a solvent. The characterization of the PDMS–polythiophene (Pth) compo…
Organic Electronics and PhotovoltaicsAdvanced Sensor and Energy Harvesting MaterialsConducting polymers and applications
Lihua Wang、Jing Sheng2003-01-10Journal of Macromolecular Science Part A
Clay–polymer hybrid materials are prepared from natural attapulgite (ATP) that was first modified with silane coupling agent, and next, graft polymerization processed with butyl acrylate (BA). The silane‐modified ATP dispersed in a solution of acrylate in toluene. In this system, free‐radical polymerization was carrie…
Polymer Nanocomposites and Propertiesbiodegradable polymer synthesis and propertiesPolymer Nanocomposite Synthesis and Irradiation
Emese Kriván、Csaba Visy、Jouko Kankare2003-01-10The Journal of Physical Chemistry B
The relaxation process of pristine polypyrrole/dodecyl sulfate (PPy/DS) films at open circuit, immediately after electropolymerization, was studied by in situ spectroelectrochemical, alternating-current conductance, electrochemical quartz crystal microbalance, and pH-metric techniques. A new phenomenon, called irregul…
Electrochemical sensors and biosensorsConducting polymers and applicationsAnalytical Chemistry and Sensors
Joulia Larionova≠、Farzaneh Fadaei‐Tirani、B. Donnadieu 等 5 位作者2003-01-10Crystal Growth & Design
A one pot reaction between the [Mo IV (CN) 8 ] 4- unit and the [Cu(cyclam)] 2+ complex (cyclam = 1,4,8,11-tetraazacyclodecane) in aqueous solution yields the new cyano-bridged coordination polymer [Cu(cyclam)] 2 [Mo(CN) 8 ]·10.5H 2 O. The compound presents an unusual two-dimensional framework with neutral zigzag sheet…
Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Shinji Ikeda、Takahito Nakajima、Kimihiko Hirao2003-01-10Molecular Physics
Calculations have been performed on the transition metal hydroxides CuOH, AgOH, and AuOH using SCF and the coupled-cluster with singles, doubles, and perturbative triples (CCSD(T)) methods. The relativistic effect was included in the third-order Douglas—Kroll approximation. Equilibrium geometries, dissociation energie…
Advanced Chemical Physics StudiesCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions
Debabrata Rautaray、S. R. Sainkar、Murali Sastry2003-01-10Langmuir
In this paper we demonstrate the crystallization of strontium carbonate in the form of thin sheets/ribbons within thermally evaporated sodium bis-2-ethylhexylsulfosuccinate (aerosol OT, AOT) thin films by a process of Sr 2+ ion entrapment followed by reaction with CO 3 2 - ions within the lipid matrix. The morphology…
Surfactants and Colloidal SystemsCalcium Carbonate Crystallization and InhibitionAnalytical Chemistry and Sensors
Garima Tripathi2003-01-10Journal of the American Chemical Society
This communication reports the SERS observation of p-benzosemiquinone radical anion, produced on reduction of p-benzoquinone by Ag nanoparticles at the metal-water interface. The species is positively identified by comparison of the SERS spectrum with the resonance Raman spectra of the radical anion in aqueous solutio…
Gold and Silver Nanoparticles Synthesis and ApplicationsSpectroscopy and Quantum Chemical StudiesElectrochemical Analysis and Applications
Mònica Campàs、Ciara O’Sullivan2003-01-10Analytical Letters
Layer-by-Layer (LbL) assemblies are multi-modular constructions created on solid substrate mainly via electrostatic interactions between polyanions and polycations. The LbL approach can be used for the inter-layer immobilization of biomolecules with enhanced properties for biocatalytic and immunosensing applications,…
Polymer Surface Interaction StudiesMolecular Junctions and NanostructuresNanofabrication and Lithography Techniques
Wassana Yantasee、Yuehe Lin、Glen E. Fryxell 等 5 位作者2003-01-10Separation Science and Technology
Self‐assembled monolayers of carbamoylphosphonic acids (acetamide phosphonic acid and propionamide phosphonic acid) on mesoporous silica supports were studied as potential absorbents for heavy and transition metal ions in aqueous wastes. The adsorption capacity, selectivity, and kinetics of the materials in sequesteri…
Mesoporous Materials and CatalysisPolyoxometalates: Synthesis and ApplicationsChemical Synthesis and Characterization
M. P. Seah、Steven J. Spencer2003-01-10Journal of Vacuum Science & Technology A Vacuum Surfaces and Films
An analysis is made of the amount of carbonaceous contamination remaining on silicon wafers with a thin oxide overlayer. Wafers are either left “as-received” or deliberately contaminated with a thumbprint and then subjected to one of 42 different cleaning procedures with the remaining carbon level monitored by x-ray p…
Semiconductor materials and devicesAdvancements in Photolithography TechniquesElectron and X-Ray Spectroscopy Techniques
Biju John、K. T. Varughese、Zachariah Oommen 等 5 位作者2003-01-10Journal of Applied Polymer Science
Abstract The effects of the blend ratio, reactive compatibilization, and dynamic vulcanization on the dynamic mechanical properties of high‐density polyethylene (HDPE)/ethylene vinyl acetate (EVA) blends have been analyzed at different temperatures. The storage modulus of the blend decreases with an increase in the EV…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesRheology and Fluid Dynamics Studies
Tae Hyong Kim、Sung Taek Lim、Chung H. Lee 等 5 位作者2003-01-10Journal of Applied Polymer Science
Abstract Polystyrene (PS)/organophilic montmorillonite (OMMT) clay nanocomposites were prepared by a solvent casting method using chloroform as a cosolvent. Intercalation of the OMMT in the PS matrix was achieved as revealed by X‐ray diffraction. The IR spectra of the products indicated that the OMMT is homogeneously…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Sarah M. Cooper、Helen F. Chuang、Martin Cinke 等 5 位作者2003-01-10Nano Letters
Gas permeability has been measured through a carbon nanotube-based “buckypaper” membrane and through commercially available porous anodized alumina membranes with 200 nm nominal pore dimensions. Permeation relationships through the alumina membrane are consistent with Knudsen-type diffusion. Permeation behavior in the…
Carbon Nanotubes in CompositesNanomaterials and Printing TechnologiesNanopore and Nanochannel Transport Studies
Marie‐Christine Daniel、Jaimé Ruiz、Didier Astruc2003-01-10Journal of the American Chemical Society
The DSM polyamine dendrimers dend-DAB-(NH2)x of generations 1 (x = 4) to 4 (x = 32) form H-bonded dendritic assemblies with the phenol AB3 units p-HOC6H4C(CH2CHCH2)3 and p-HOC6H4C{(CH2)3SiCH2NHCOFc}3 (Fc = ferrocenyl), as shown by the shifts of the NH2 and OH signals giving a concentration-dependent common signal betw…
Molecular Sensors and Ion DetectionLuminescence and Fluorescent MaterialsDendrimers and Hyperbranched Polymers
Hideatsu Maeda、Yoshiko Maeda2003-01-10Physical Review Letters
We successfully prepared monodisperse, hard rodlike colloidal particles with a wide range of length-to-width ratios (L/W). In their suspensions liquid crystals, or nematic (N) and smectic (Sm) phases, spontaneously appeared. The size of the particles made it possible to directly observe their arrangement and dynamics…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesSurfactants and Colloidal Systems
Paul M. Forster、Juergen Eckert、Jong-San Chang 等 6 位作者2003-01-10Journal of the American Chemical Society
Hydrogen sorption in the nanoporous nickel phosphates VSB-1 and VSB-5 has been studied with a combination of BET, temperature programmed desorption (TPD), and inelastic neutron scattering (INS) measurements. H(2) BET isotherms for VSB-1 are similar to those seen in nanoporous zeolites, while VSB-5 adsorbs substantiall…
Hydrogen Storage and MaterialsAmmonia Synthesis and Nitrogen ReductionChemical Synthesis and Characterization