Weiguo Shao、Qi Wang、Hong Ma2004-12-06Polymer International
Abstract In this paper, polypropylene (PP)/organophilic montmorillonite (OMMT) nanocomposites were successfully prepared without any compatibilizers by solid‐state shear compounding (S 3 C) using pan‐mill equipment. X‐ray diffraction (XRD) patterns show that the OMMT characteristic (001) peak at 2θ equal to 4.59 degre…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Fuk Kay Lee、Baoshe Zhang、Ping Sheng 等 5 位作者2004-12-06Applied Physics Letters
Reliable control on the pretilt alignment of nematic liquid crystal (LC) in the 30°–50° range is a well-known challenge. An unconventional approach, involving microtextured surfaces with domains favoring dissimilar LC alignments, has recently demonstrated applicability in bi- and tristable displays. These textured dom…
Liquid Crystal Research AdvancementsAdvanced Materials and MechanicsAdhesion, Friction, and Surface Interactions
Philippe Coussot、Nicolas Roussel、Sébastien Jarny 等 4 位作者2004-12-06Physics of Fluids
Pasty materials encountered in industry and in earth science are intermediate between solids and liquids either in terms of their internal structure (disordered but jammed) or from a mechanical point of view. Our results indicate that the apparent behavior of a particulate system (soils, suspensions, clays, etc.) can…
Material Dynamics and PropertiesGranular flow and fluidized bedsRheology and Fluid Dynamics Studies
Hongwei Zhang、Wang Fang、Tongyun Zhao 等 6 位作者2004-12-06Physical Review B
We have investigated the process of a metamagnetic transition (MT) between the ferromagnetic and paramagnetic states in the $\mathrm{La}{\mathrm{Fe}}_{11.7}{\mathrm{Si}}_{1.3}$ compound, which has both giant magnetocaloric and large magnetovolume effects. The nucleation in MT, which indicates the coexistence of two ph…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsMagnetic Properties of Alloys
James W. M. Chon、Peter Zijlstra、Miṅ Gu 等 5 位作者2004-12-06Applied Physics Letters
We report on a two-photon absorption-induced photoenhancement effect on a densely packed CdSe∕ZnSe∕ZnS core-shell semiconductor nanocrystal solid film. The enhancement is found to be irreversible without a noticeable blueshift in emission spectra, hence we attribute the enhancement to the photoannealing of interface d…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsNonlinear Optical Materials Studies
Mihail Atanasov、Cédrick Rauzy、Pio Baettig 等 4 位作者2004-12-06International Journal of Quantum Chemistry
Abstract Spin‐orbit coupling has been introduced into our newly developed ligand field density functional theory (LFDFT), using the zero‐order regular approximation as implemented into the Amsterdam density functional (ADF) code. Application of the formalism to a series of Ni X (XF − , Cl − , Br − , I − ) compounds s…
Magnetism in coordination complexesOrganic and Molecular Conductors ResearchInorganic Fluorides and Related Compounds
Xiangli Zhong、Jinbin Wang、Xuejun Zheng 等 5 位作者2004-12-06Applied Physics Letters
Bi 3.5 Nd 0.5 Ti 3 O 12 (BNT) ferroelectric thin films were fabricated on Pt∕Ti∕SiO2∕Si(100) substrates by chemical solution deposition. Structure evolution and ferroelectric and dielectric properties of the as-prepared thin films under a moderate temperature (600–750°C) annealing were studied in detail. The experimen…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsMicrowave Dielectric Ceramics Synthesis
Mehmet Çoşkun、Mehmet Mürşi̇t Temüz2004-12-06Polymer International
Abstract Styrene (Sty), methyl methacrylate (MMA), methacrylamide (MAm) and acrylomorpholine (AcM) were grafted onto powder cellulose by atom‐transfer radical polymerization. Cellulose chloroacetate (Cell‐ClAc), as a macro‐initiator, was first prepared by the reaction of chloroacetyl chloride with primary alcoholic OH…
Advanced Polymer Synthesis and CharacterizationAdvanced Cellulose Research StudiesPolymer Science and PVC
K.-P. Bohnen、R. Heid、H. J. Liu 等 4 位作者2004-12-06Physical Review Letters
We present a detailed study of the lattice dynamics and electron-phonon coupling for a (3,3) carbon nanotube which belongs to the class of small diameter based nanotubes which have recently been claimed to be superconducting. We treat the electronic and phononic degrees of freedom completely by modern ab initio method…
Carbon Nanotubes in CompositesGraphene research and applicationsSuperconductivity in MgB2 and Alloys
Iain E. Dunlop、Wuge H. Briscoe、Simon Titmuss 等 6 位作者2004-12-06Macromolecular Chemistry and Physics
Abstract Summary: We use a surface force balance (SFB) to study the normal interactions between polymer brushes, which are self‐assembled from solution. They consist of polystyrene (PS) chains in toluene (neutral chains in a good solvent) anchored on the interacting mica surfaces via sulfozwitterionic end groups. The…
Polymer Surface Interaction StudiesForce Microscopy Techniques and ApplicationsAdhesion, Friction, and Surface Interactions
Mikael Stolt、Katarzyna Krasowska、Maria Rutkowska 等 6 位作者2004-12-06Polymer International
Abstract Polylactides were prepared by ring‐opening polymerization (ROP) in bulk using as catalyst either stannous 2‐ethylhexanoate at a monomer to catalyst ratio of 2000, or ferrous acetate (Fe(OAc) 2 ) at monomer to catalyst ratios of 500, 1000, 2000 and 3000. The crystallization behaviour was studied for the prepar…
biodegradable polymer synthesis and propertiesMicroplastics and Plastic PollutionBiopolymer Synthesis and Applications
Paula C. Angelomé、Sara A. Bilmes、Mauricio E. Calvo 等 7 位作者2004-12-06New Journal of Chemistry
Large-pore TiO2 and ZrO2 mesoporous films with 2D-Hex or cubic mesostructures were prepared by dip-coating. Organic bifunctional molecules presenting an organic function and a complexing grafting group (phosphate, carboxylate) were explored as surface modifiers. The incorporation of these functions into the mesoporous…
Catalytic Processes in Materials ScienceMesoporous Materials and CatalysisLayered Double Hydroxides Synthesis and Applications
Chiara Daraio、V. F. Nesterenko、Sungho Jin2004-12-06Applied Physics Letters
Mechanical response and energy dissipation of an array of carbon nanotubes under high-strain rate deformation was studied using a simple drop-ball test with the measurement of the dynamic force between the ball and forest of nanotubes. This convenient process allows extracting force–displacement curves and evaluating…
Carbon Nanotubes in CompositesForce Microscopy Techniques and ApplicationsMechanical and Optical Resonators
A. Kyarad、H. Lengfellner2004-12-06Applied Physics Letters
A synthetic material with large thermoelectric anisotropy has been prepared from a metal–semiconductor multilayer structure. By an alloying process, a multilayer stack A–B–A…, where A and B are pure aluminum and n-silicon, is produced with a thermoelectric anisotropy ΔS=S‖−S⊥≅1.5mV∕K, where S‖ and S⊥ are the absolute…
Advanced Thermoelectric Materials and DevicesSemiconductor materials and interfacesHeusler alloys: electronic and magnetic properties
Julong He、Licong Guo、Dongli Yu 等 6 位作者2004-12-06Applied Physics Letters
The hardness of cubic spinel Si3N4 was calculated by using our microscopic model of hardness combined with first principles calculation. The calculated Vickers hardness is only 33.3GPa in good agreement with its experimental values reported recently, indicating that the cubic spinel Si3N4 is not a superhard material.…
Advanced ceramic materials synthesisBoron and Carbon Nanomaterials ResearchMXene and MAX Phase Materials
Nir Kampf、Jean‐François Gohy、Robert Jérôme 等 4 位作者2004-12-06Journal of Polymer Science Part B Polymer Physics
Abstract The diblock copolymer poly(methyl methacrylate)‐ b ‐poly(sodium sulfonated glycidyl methacrylate) (PMMA‐ b ‐PSGMA) was end‐attached by its hydrophobic block (PMMA) onto mica hydrophobized by a stearic trimethylammonium iodide (STAI) layer, to form a polyelectrolyte brush immersed in water. With a surface forc…
Surface Modification and SuperhydrophobicityPolymer Surface Interaction StudiesAdhesion, Friction, and Surface Interactions
Dong Wang、Naomi L Smith、Peter M. Budd2004-12-06Polymer International
Abstract High internal phase emulsions (HIPEs) of styrene and divinylbenzene (DVB), with 0–40 % vinylbenzyl chloride (VBC) in the oil phase, were polymerized to give porous polymers (pore volumes 84–92 %), which were sulfonated and carbonized at temperatures up to 700 °C to obtain macroporous carbon monoliths. On carb…
Mesoporous Materials and CatalysisBlock Copolymer Self-AssemblyPickering emulsions and particle stabilization
G. Maggioni、Alberto Vomiero、S. Carturan 等 10 位作者2004-12-06Applied Physics Letters
Au-polyimide nanocomposites have been synthesized by implanting different doses of Au+ ions in 100nm thick films of pyromellitic dianhydride-4,4′ oxydianiline polyimide, prepared by glow discharge vapor deposition polymerization. Unambiguous evidence of Au nanoclusters growth is found only at the highest implantation…
Diamond and Carbon-based Materials ResearchPolymer Nanocomposites and PropertiesPolymer Nanocomposite Synthesis and Irradiation
Narayan Chandra Das、Shinichi Yamazaki、Masamichi Hikosaka 等 6 位作者2004-12-06Polymer International
Abstract Electrical conductivity and electromagnetic interference (EMI) shielding effectiveness at microwave (200–2000 MHz) and X‐band (8–12 GHz) frequency range of polyaniline (PAni) composites were studied. It has been observed that EMI shielding of conductive polyaniline (PAni)–ethylene vinyl acetate composites inc…
Advanced Sensor and Energy Harvesting MaterialsConducting polymers and applicationsElectromagnetic wave absorption materials
R. E. Napolitano、S. Liu2004-12-06Physical Review B
The quantitative determination of the three-dimensional Wulff shape for a metallic crystal-melt system is reported here. The anisotropy of crystal-melt interfacial free energy is experimentally measured for the $\mathrm{Al}--\mathrm{Sn}$ binary system at temperatures of 300 and $500\phantom{\rule{0.2em}{0ex}}\ifmmode^…
Aluminum Alloy Microstructure PropertiesSolidification and crystal growth phenomenaBlock Copolymer Self-Assembly