Ryozo Kaito、Nobuyoshi Miyamoto、Kazuyuki Kuroda 等 4 位作者2002-11-06Journal of Materials Chemistry
Two cationic phthalocyanines (Pc), a tetravalent Alcian Blue pyridine variant (ABpy4+) and a monovalent iron(III) phthalocyanine (FePc+), were intercalated into two layered titanates derived from Na2Ti3O7 and CsxTi2 − x/4□x/4O4 (□ = vacancy, x = 0.7) by using the corresponding propylammonium titanates as the intermedi…
Advanced Photocatalysis TechniquesPorphyrin and Phthalocyanine ChemistryPolyoxometalates: Synthesis and Applications
T. Darrah Thomas、Catalin Miron、Karoline Wiesner 等 6 位作者2002-11-06Physical Review Letters
The silicon $2p$ photoelectron spectra for $\mathrm{S}\mathrm{i}{\mathrm{H}}_{\mathrm{4}}$, $\mathrm{S}\mathrm{i}{\mathrm{F}}_{\mathrm{4}}$, and $\mathrm{S}\mathrm{i}\mathrm{C}{\mathrm{l}}_{\mathrm{4}}$ have been analyzed to give the natural linewidths of the Si $2p$ hole states, which reflect the Auger decay rates of…
Advanced Chemical Physics StudiesX-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy Techniques
Cliff T. Johnston、Gui-Hua Sheng、B. J. Teppen 等 5 位作者2002-11-06Environmental Science & Technology
Sorption of two dinitrophenolic herbicides, 4,6-dinitro-o-cresol (DNOC) and 4,6-dinitro-2-sec-butylphenol (DINOSEB) to smectite was studied using FTIR, HPLC, and quantum chemical methods. The high affinity of DNOC and DINOSEB for smectite surfaces was attributed to site-specific interactions with exchangeable cations…
Mesoporous Materials and CatalysisPesticide and Herbicide Environmental StudiesClay minerals and soil interactions
Patit Paban Kundu、G. L. Verma、K. K. Raina2002-11-06Journal of Applied Polymer Science
Abstract The textural and electrooptical behavior of a nematic liquid crystal (LC) dispersed in a flexible and rigid polyester was studied. The dispersion of LC in the polymer matrix and light transmission through the polymer‐dispersed liquid crystal (PDLC) is governed by the nature of the polymer, its molecular weigh…
Photonic and Optical DevicesLiquid Crystal Research AdvancementsElectrowetting and Microfluidic Technologies
Nicholas A. Peppas、Ankush B. Argade、Saumitra Bhargava2002-11-06Journal of Applied Polymer Science
Abstract Poly(ethylene oxide) (PEO) star polymers were prepared by anionic polymerization of methacryloyl chloride and glyceryl trimethacrylate with sec ‐butyllithium in cyclohexane. The ensuing polymers were grafted with poly(ethylene glycol) of molecular weight 400. The final product was washed with methylene chlori…
Advanced Polymer Synthesis and CharacterizationPolymer Nanocomposites and PropertiesSynthesis and properties of polymers
Raúl C. Mun̄oz、Ricardo Finger、Claudio Arenas 等 5 位作者2002-11-06Physical review. B, Condensed matter
We have extended the modified formalism of Sheng, Xing, and Wang [J. Phys.: Condens. Matter 11 L299 (1999)] to allow the calculation of the conductivity of a thin metallic film bounded by a rough fractal surface. We utilized the so-called k-correlation model proposed by Palasantzas and Barnas [Phys. Rev. B 48, 14 472…
Theoretical and Computational PhysicsCopper Interconnects and ReliabilitySurface and Thin Film Phenomena
Sandro Recchia、Carlo Dossi、Rinaldo Psaro 等 6 位作者2002-11-06The Journal of Physical Chemistry B
Dinitrogen (N 2 ) adsorption on overexchanged Cu-ZSM-5 (Si/Al = 25, 104% ion exchange from copper acetate) was studied at 302 K by diffuse reflectance infrared spectroscopy (DRIFTS), N 2 -adsorption isotherms, and temperature-programmed N 2 desorption (TPD). We found that Cu-ZSM-5 adsorbs N 2 at least in two different…
Metal-Organic Frameworks: Synthesis and ApplicationsCatalytic Processes in Materials ScienceZeolite Catalysis and Synthesis
Ohgun Sohn、Dukjoon Kim2002-11-06Journal of Applied Polymer Science
Abstract Sodium polyacrylate superabsorbent polymers were prepared in particle forms by the inverse suspension technique. The surfactant concentration effect on the polymer particle size was analyzed with molecular sieves and an optical microscope. Water absorption and desorption characteristics were analyzed by the g…
Hydrogels: synthesis, properties, applicationsPolymer Nanocomposites and PropertiesSurfactants and Colloidal Systems
Masahiro Ito、Toyoko Imae、Keigo Aoi 等 6 位作者2002-11-06Langmuir
The adlayer formation and adsorption kinetics of third- and fourth-generation (G3 and G4) amphiphilic surface-block dendrimers with amino and n -hexyl terminals (amino/hexyl), hydroxyl and n -hexyl terminals (hydroxyl/hexyl), and N -acetyl- d -glucosamine and n -hexyl terminals (glucosamine/hexyl) on solid substrates…
RNA Interference and Gene DeliveryPolymer Surface Interaction StudiesDendrimers and Hyperbranched Polymers
Zehua Li、Eli Ruckenstein2002-11-06Macromolecules
A combination of surface graft polymerization of aniline and photopatterned self-assembly monolayer (SAM) was used to generate a well-defined pattern of conductive polyaniline on a Si(100) surface. A self-assembly of phenylsilane monolayer was first generated by reacting a hydroxylated silicon surface with phenyltrich…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsMolecular Junctions and Nanostructures
E.A.J.F. Peters、Th. M. A. O. M. Barenbrug2002-11-06Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
In this paper a method of numerically handling boundary conditions within Brownian dynamics simulations is discussed. The usual naive treatment of identifying reflection or absorption processes by checking for boundary crossings yields O(sqrt[deltat]) discretization errors. The method we propose here yields O(deltat)…
Material Dynamics and PropertiesBlock Copolymer Self-AssemblyElectrostatics and Colloid Interactions
Haruo Naruke、Toshihiro Yamase2002-11-06Inorganic Chemistry
Single crystals of R(2)Mo(5)O(18) and R(6)Mo(12)O(45) (R = Eu and Gd), which are novel compounds in the R(2)O(3)-MoO(3) system, have been obtained by thermal decomposition of [R(2)(H(2)O)(12)Mo(8)O(27)].nH(2)O in air at 750 degrees C for 2 h. TG-DTA and X-ray diffractometry showed that R(2)Mo(5)O(18) crystallizes in a…
Layered Double Hydroxides Synthesis and ApplicationsInorganic Chemistry and MaterialsThermal Expansion and Ionic Conductivity
Mironel Enescu、Karine Steenkeste、F. Tfibel 等 4 位作者2002-11-06Physical Chemistry Chemical Physics
Molecular relaxation processes following Soret band excitation of tetrakis(N-methyl-4-pyridyl)porphyrin (H2TMPyP(4)) and tetrakis(N-methyl-4-pyridyl)porphyrin-Zn(II) (ZnTMPyP(4)) have been investigated by femtosecond transient absorption measurements in the spectral range 420–600 nm. The analysis has been carried out…
Porphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research StudiesPhotochemistry and Electron Transfer Studies
Van Hoa Nguyen、Wayne Yoshida、Yoram Cohen2002-11-06Journal of Applied Polymer Science
Abstract The free‐radical graft polymerization of vinyl acetate onto nonporous silica particles was studied experimentally. The grafting procedure consisted of surface activation with vinyltrimethoxysilane, followed by free‐radical graft polymerization of vinyl acetate in ethyl acetate with 2,2′‐azobis(2,4‐dimethylpen…
Advanced Polymer Synthesis and CharacterizationPolymer Surface Interaction StudiesAnalytical Chemistry and Sensors
Orlando E. Raola、Geoffrey F. Strouse2002-11-06Nano Letters
Substitution of Cd(II) sites by Eu ions in 5.0 nm ± 0.25 nm CdSe, Cd 1 - x Eu x Se ( x = 0−0.374), can be achieved by modification of a lyothermal, single source precursor method. The Eu guest ion occupies a tetrahedral lattice site as a Eu(III) defect ion based on analysis of the XPS and XAS data. XRD and XAS measure…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsCrystal Structures and Properties
Philip Tinnefeld、Kenneth D. Weston、Tom Vosch 等 9 位作者2002-11-06Journal of the American Chemical Society
The photophysics of a dendrimer containing four chromophores are investigated at the single-molecule level. First, the multichromophoric character of single dendrimers' absorption is probed by modulating the linear polarization of the excitation beam. Subsequently, using circular polarization, the same dendrimers are…
Gold and Silver Nanoparticles Synthesis and ApplicationsMolecular Junctions and NanostructuresDendrimers and Hyperbranched Polymers
Wulin Qiu、Farao Zhang、Takashi Endo 等 4 位作者2002-11-06Journal of Applied Polymer Science
Abstract Binary composites of high‐crystalline fibrous cellulose with polypropylene (PP) or maleic anhydride‐grafted polypropylene (MAPP) were prepared by melt‐mixing with different contents of cellulose from 0 to 60 wt %. Ternary composites of cellulose with PP and MAPP were also prepared to investigate the effects o…
Natural Fiber Reinforced CompositesAdvanced Cellulose Research StudiesElectromagnetic wave absorption materials
G. Baskaran2002-11-06arXiv
Mott insulator superconductor transition, via pressure and no external doping, is studied in orbitally non degenerate spin-\half systems. It is presented as another RVB route to high \tc superconductivity. We propose a `strong coupling' hypothesis which helps to view first order Mott transition as a self doping proces…
Materials ScienceStrongly Correlated ElectronsSuperconductivity
Serkan Erdin2002-11-06arXiv
We study the equilibrium state of a superconducting film covered with a regular square array of perpendicularly magnetized magnetic dots. The dots induce vortices in the film directly under them and antivortices between the dots. We show that the symmetry of the dot array is spontaneously violated by the vortices. The…
Materials ScienceSuperconductivity
J. M. Pitarke、J. P. Perdew2002-11-06arXiv
The role that non-local short-range correlation plays at metal surfaces is investigated by analyzing the correlation surface energy into contributions from dynamical density fluctuations of various two-dimensional wave vectors. Although short-range correlation is known to yield considerable correction to the ground-st…
Materials Science