Mariacecilia Pasini、Silvia Destri、William Porzio 等 5 位作者2003-02-27Journal of Materials Chemistry
A new copolymer, constituted by the regular alternation of a fluorene derivative with a 1,1-dioxothiophene moiety, has been synthesised via Suzuki coupling. The molecular, thermal, structural, and photophysical characterisations have been performed. The material showed two dimensional order, enhanced by annealing; mol…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsSynthesis and properties of polymers
Ivelisse Ortiz-Hernandez、Christopher T. Williams2003-02-27Langmuir
It is demonstrated that attenuated total reflection infrared (ATR-IR) spectroscopy can be effectively used for in situ investigation of supported catalyst−liquid interfaces. Thin (ca. 10 μm) films of a 5 wt % Pt/γ-Al 2 O 3 catalyst were deposited onto the surface of a germanium waveguide. The very small support partic…
Catalytic Processes in Materials ScienceSpectroscopy and Quantum Chemical StudiesElectrochemical Analysis and Applications
Kostya Trachenko、Martin T Dove2003-02-27Physical review. B, Condensed matter
We model the process of densification of silica glass using molecular dynamics simulation in order to resolve the current controversy regarding the existence of the first-order phase transition in this material. We propose the picture in which the structural changes start to take place in the pressure window between 3…
Material Dynamics and PropertiesGlass properties and applicationsTheoretical and Computational Physics
José de la Fuente、Marta Fernández‐García、María L. Cerrada2003-02-27Journal of Applied Polymer Science
Abstract Investigations have been ongoing to learn the rheological and/or mechanical behavior of composite solid propellants based on hydroxyl‐terminated polybutadiene (HTPB). The mechanical properties of these materials are related to the macromolecular structure of the binder as well as to the content and nature of…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesEnergetic Materials and Combustion
Randall W. Hall、Peter G. Wolynes2003-02-27Physical Review Letters
A theory of the glass transition of network liquids is developed using self-consistent phonon and liquid state approaches. The dynamical transition and entropy crisis characteristic of random first-order transitions are mapped as a function of the degree of bonding and density. Using a scaling relation for a soft-core…
Material Dynamics and PropertiesTheoretical and Computational PhysicsAdvanced Thermodynamics and Statistical Mechanics
Wenbing Hu、Vincent Mathot、Daan Frenkel2003-02-27Macromolecules
We report a numerical study of crystallization and melting in bulk statistical homogeneous (random), homogeneous (slightly alternating), and heterogeneous (produced in a batch reaction) copolymers formed by crystallizable monomers and noncrystallizable comonomers. In our dynamic Monte Carlo simulations of lattice chai…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesMachine Learning in Materials Science
Daniel Geißler、Wolfgang Kresse、Burkhard Wiesner 等 6 位作者2003-02-27ChemBioChem
The development of new photocleavable adenosine nucleotides based on the photochemistry of [7-(dimethylamino)coumarin-4-yl]methyl (DMACM) esters is described. The phototriggers liberate adenosine triphosphate (ATP), diphosphate, and monophosphate upon UV/Vis irradiation between 334 and 405 nm. The efficiency of photoc…
Luminescence and Fluorescent MaterialsPhotochromic and Fluorescence ChemistryPhotoreceptor and optogenetics research
S. L. Abd‐El‐Messieh、K. N. Abd‐El‐Nour2003-02-27Journal of Applied Polymer Science
Abstract Dielectric investigations were carried out on styrene–butadiene rubber cured by an increase in either the sulfur content or curing time in a wide range of frequencies from 100 Hz up to 10 MHz and at room temperature (≈25°C). After subtraction, the losses due to the Maxwell–Wagner effect, the dielectric data s…
Polymer Nanocomposites and PropertiesEpoxy Resin Curing ProcessesDielectric materials and actuators
R. Ali、Salvatore Iannace、L. Nicolais2003-02-27Journal of Applied Polymer Science
Abstract To study the effects of processing conditions on the viscoelastic and mechanical properties of biodegradable composites, we prepared several composites based on sisal fibers and biodegradable polymers. The effects of processing conditions such as the speed of rotation, temperature, and time of mixing were inv…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesNatural Fiber Reinforced Composites
Z Z Zhi、Yichun Liu、B S Li 等 7 位作者2003-02-27Journal of Physics D Applied Physics
To improve ZnO thin film quality, the ZnO thin films grown on silicon (100) by plasma enhanced chemical vapour deposition from Zn(C 2 H 5 ) 2 and CO 2 gas mixtures at a low temperature of 120°C are annealed in an oxygen ambient at temperature ranging from 600°C to 1000°C. X-ray diffraction spectra indicate that ZnO fi…
ZnO doping and propertiesCopper-based nanomaterials and applicationsGa2O3 and related materials
Cameron F. Abrams、Luigi Delle Site、Kurt Kremer2003-02-27Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
We present a dual-resolution coarse-graining scheme for efficient molecular dynamics simulations of bisphenol-A-polycarbonate (BP-A-PC) liquids in contact with a (111) nickel surface. The essential feature of this model is the strong adsorption of phenoxy chain ends, and the absence of adsorption by other parts of the…
Material Dynamics and PropertiesTheoretical and Computational PhysicsBlock Copolymer Self-Assembly
Boaz Pokroy、E. Zolotoyabko2003-02-27Journal of Materials Chemistry
The three-dimensional microstructure of a Strombus decorus persicus seashell was studied by means of high-resolution electron microscopy and energy-variable X-ray diffraction on synchrotron beam lines. Energy variation in small steps allows the X-ray penetration depth to be changed precisely and, on this basis, for a…
Bone Tissue Engineering MaterialsCalcium Carbonate Crystallization and InhibitionBuilding materials and conservation
H. Unal、Fehim Fındık、A. Mimaroğlu2003-02-27Journal of Applied Polymer Science
Abstract Particulate reinforced thermoplastic composites are designed to improve the properties and to lower the overall cost of engineering plastics. In this study, the influence of adding talc and kaolin fillers on the mechanical properties of nylon 6 was investigated. Fillers, either singly or mixed by various weig…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesNatural Fiber Reinforced Composites
Man‐kit Leung、Meng‐Yen Chou、Yuhlong Oliver Su 等 9 位作者2003-02-27Organic Letters
[reaction: see text] The diphenylamino group is an effective handle for electropolymerization to give electron donor-acceptor conjugated polymers. In addition, interesting electrochromic and photoresponsive behavior of 13 has been investigated.
Organic Electronics and PhotovoltaicsConducting polymers and applicationsPolyoxometalates: Synthesis and Applications
Hongchao Li、Jan O. Jeppesen、Eric Levillain 等 4 位作者2003-02-27Chemical Communications
Annulation of one TTF unit directly to the porphyrin chromophore produces an almost nonfluorescent species which can be transformed into a fluorescent species by oxidation of the TTF unit.
Organic Electronics and PhotovoltaicsPorphyrin and Phthalocyanine ChemistryOrganic and Molecular Conductors Research
Eva Loste、Eva Díaz-Martí、Ali Zarbakhsh 等 4 位作者2003-02-27Langmuir
Calcium carbonate was precipitated from a supersaturated calcium bicarbonate solution in association with a series of long-chain fatty acid monolayers, and the location of the growing crystals with respect to the monolayer domain structure was determined by in situ analysis using a Brewster angle microscope (BAM). Inc…
Force Microscopy Techniques and ApplicationsCalcium Carbonate Crystallization and InhibitionCrystallization and Solubility Studies
Siu-Pang Chan、Gang Chen、X. G. Gong 等 4 位作者2003-02-27Physical Review Letters
Chemisorption of singlet (1)Delta(g) O2 on single-walled carbon nanotubes is reexamined by first principles calculations, and the reaction barrier is substantially lower than previously reported when the spin on O2 is correctly treated. The process is initiated by the cycloaddition of a singlet O2 on top of a C-C bond…
Carbon Nanotubes in CompositesGraphene research and applicationsTransition Metal Oxide Nanomaterials
Brendan O’Malley、Ian K. Snook2003-02-27Physical Review Letters
The structure and growth of crystal nuclei that spontaneously form during computer simulations of the simplest nontrivial model of a liquid, the hard sphere system, is described in this work. Compact crystal nuclei are observed to form at densities within the coexistence region of the phase diagram. The nuclei possess…
Material Dynamics and PropertiesTheoretical and Computational PhysicsAdvanced Thermodynamics and Statistical Mechanics
Pierre Mialane、Laurent Lisnard、A. Mallard 等 8 位作者2003-02-27Inorganic Chemistry
The reactivity of the [alpha-SiW(11)O(39)](8-) monovacant polyoxometalate with lanthanide has been investigated for four different trivalent rare-earth cations (Ln = Nd(III), Eu(III), Gd(III), Yb(III)). The crystal structures of KCs(4)[Yb(alpha-SiW(11)O(39))(H(2)O)(2)] x 24H(2)O (1), K(0.5)Nd(0.5)[Nd(2)(alpha-SiW(11)O…
Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsChemical Synthesis and Reactions
A. Necmeddin Yazıcı、M. Topaksu2003-02-27Journal of Physics D Applied Physics
The additive dose, T m ( E a )– T stop , repeated initial rise, variable heating rate and computerized glow curve deconvolution (CGCD) methods were used to determine the number of peaks and kinetic parameters (kinetic orders b , activation energy E a and attempt-to-escape frequency s ) associated with the thermolumine…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsAtomic and Subatomic Physics Research