Masahiko Okada、Kouji Tachikawa、Keigo Aoi1999-12-27Journal of Applied Polymer Science
Various copolyesters were synthesized by bulk polycondensation of the respective combinations of 1,4;3,6-dianhydro-D-glucitol (1) as the diol component and 1,1-bis[5-(methoxycarbonyl)-2-furyl]ethane (3b) and seven dimethyl dialkanoates with methylene chain lengths of 4, 5, 6, 7, 8, 10, and 12 (4a–4g) as the dicarboxyl…
biodegradable polymer synthesis and propertiesCatalysis for Biomass ConversionMembrane Separation and Gas Transport
Munir H. Nayfeh、O. Akcakir、Joel Therrien 等 7 位作者1999-12-27Applied Physics Letters
Porous silicon is excited using near-infrared femtosecond pulsed and continuous wave radiation at an average intensity of ∼106 W/cm2 (8×1010 W/cm2 peak intensity in pulsed mode). Our results demonstrate the presence of micron-size regions for which the intensity of the photoluminescence has a highly nonlinear threshol…
Semiconductor materials and devicesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
Sachiko Yamanouchi、Y. Taguchi、Y. Tokura1999-12-27Physical Review Letters
Dielectic breakdown associated with characteristic delay time and subsequent negative differential resistance (NDR) have been observed in the charge-stripe phase of the ${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{NiO}}_{4+\ensuremath{\delta}}$ crystal, whose hole doping level ${n}_{h}$ ( $\phantom{\rule…
Ferroelectric and Piezoelectric MaterialsMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics
K. Premphet、P. Horanont1999-12-27Journal of Applied Polymer Science
In this study, ternary-phase polypropylene (PP) composites containing an ethylene–octene copolymer (EOR) and calcium carbonate (CaCO3) were investigated. Particular consideration was given to the influence of stearic acid treatment of the filler on the phase morphology and mechanical properties of the composites. In c…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesNatural Fiber Reinforced Composites
Giancarlo Ruocco、F. Sette、Roberto Di Leonardo 等 10 位作者1999-12-27Physical Review Letters
The sound attenuation in the THz region is studied down to $T\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}16\mathrm{K}$ in glassy glycerol by inelastic x-ray scattering. At striking variance with the decrease found below $\ensuremath{\approx}100\mathrm{K}$ in the GHz data, the attenuation in the THz range does n…
Material Dynamics and PropertiesGlass properties and applicationsTheoretical and Computational Physics
Akira Ohtomo、R. Shiroki、I. Ohkubo 等 5 位作者1999-12-27Applied Physics Letters
We have examined the thermal stability of wurtzite-phase MgxZn1−xO alloy films and ZnO/MgxZn1−xO bilayer films with x exceeding the reported solubility limit of 0.04. When a Mg0.23Zn0.78O film was annealed, the segregation of MgO started at 850 °C and the band gap was reduced to the value of that for an x=0.15 film af…
ZnO doping and propertiesGas Sensing Nanomaterials and SensorsGa2O3 and related materials
Naoki Hasegawa、Hirotaka Okamoto、Masaya Kawasumi 等 4 位作者1999-12-27Journal of Applied Polymer Science
Polystyrene–clay hybrids (PSCHs) were prepared by melt blending a styrene vinyloxazoline copolymer with organophilic clay. In the PSCHs, the silicate layers of the clay were delaminated and dispersed homogeneously to the nanometer level. The moduli of the PSCHs were higher than that of the PS copolymer. For example, t…
Polymer Nanocomposites and PropertiesPolymer Nanocomposite Synthesis and IrradiationSilicone and Siloxane Chemistry
Michael Korotin、Takeo Fujiwara、Vladimir Anisimov1999-12-27arXiv
The electronic structure of La 7/8 Sr 1/8 MnO 3 was studied by using the rotation-invariant LSDA (Local Spin Density Approximation)+U formalism. We found the specific kind of charge and orbital order for ferromagnetic insulating solution in 2a*2b*4c supercell, where a, b, and c denote cubic perovskite axes. The holes…
Materials ScienceStrongly Correlated Electrons
Reinhold Egger1999-12-27Physical Review Letters
The low-energy theory for multiwall carbon nanotubes including the long-ranged Coulomb interactions, internal screening effects, and single-electron hopping between graphite shells is derived and analyzed by bosonization methods. Characteristic Luttinger liquid power laws are found for the tunneling density of states,…
Carbon Nanotubes in CompositesGraphene research and applicationsFullerene Chemistry and Applications
作者信息未提供1999-12-27OpenAlex
The Science And Engineering Of Thermal Spray Coatings. Author: Lech The CRC Handbook of Thermal Engineering is not a traditional handhook. Engineers. Find books on mechanical engineering by doing a Word(s) anywhere or title search in Mirlyn. A word search CRC Handbook of Thermal Engineering. 2000. the electrical engin…
Material Properties and Applications
David R. Foss、John F. Brady1999-12-25Journal of Fluid Mechanics
The behaviour of the long-time self-diffusion tensor in concentrated colloidal dispersions is studied using dynamic simulation. The simulations are of a suspension of monodisperse Brownian hard spheres in simple shear flow as a function of the Péclet number, Pe , which measures the relative importance of shear and Bro…
Nanofluid Flow and Heat TransferMaterial Dynamics and PropertiesRheology and Fluid Dynamics Studies
Thomas J. Cleij、Jennifer K. King、Leonardus W. Jenneskens1999-12-23Chemistry of Materials
Chemical modification of poly(methylphenylsilane) 1 using triflate chemistry gave two series of random copolymers with different composition ratios, viz., poly(methylphenyl- co -4-dimethylaminophenylmethylsilane)s 3 − 7 and poly(methylphenyl- co -4-bromophenylmethylsilane)s 8 − 9 . The optical and electronic propertie…
Organic Light-Emitting Diodes ResearchConducting polymers and applicationsSynthesis and characterization of novel inorganic/organometallic compounds
Marina S. Cruz、Lucy D. A. Chumpitaz、José Guilherme Lembi Ferreira Alves 等 4 位作者1999-12-23Journal of Chemical & Engineering Data
Kinematic viscosities data have been obtained as a function of temperature for poly(ethylene glycols) with different molecular weights. The viscosity measurements were performed at ambient pressure and several temperatures ranging from 293.15 (or above their melting points) to 363.15 K. A generalized correlation based…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesAdsorption, diffusion, and thermodynamic properties of materials
Guilford Jones、Valentine I. Vullev、Emory H. Braswell 等 4 位作者1999-12-23Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTMultistep Photoinduced Electron Transfer in a de Novo Helix Bundle: Multimer Self-Assembly of Peptide Chains Including a Chromophore Special Pair1Guilford Jones, Valentine Vullev, Emory H. Braswell, and Dan ZhuView Author Information Department of Chemistry and the Cen…
Porphyrin and Phthalocyanine ChemistrySupramolecular Self-Assembly in MaterialsPhotochromic and Fluorescence Chemistry
Jorge Pérez‐Juste、Florian Hollfelder、Anthony J. Kirby 等 4 位作者1999-12-23Organic Letters
[reaction: see text] We have analyzed the different catalytic effects of surfactant aggregates upon the rate-determining hydroxide ion induced deprotonation reaction of 1. Vesicles are more effective catalysts than micelles, most likely providing a more apolar microenvironment at the substrate binding sites. We sugges…
Porphyrin and Phthalocyanine ChemistryProtein Interaction Studies and Fluorescence AnalysisElectron Spin Resonance Studies
Mark Green、D. A. Neumann1999-12-23Chemistry of Materials
Synthesis of the Ruddlesden−Popper phase, LaCa 2 Mn 2 O 7 is presented. The difficulty in obtaining a single-phase material, free from a perovskite impurity, is highlighted. Powder X-ray diffraction indicates an orthorhombic symmetry. Powder neutron diffraction reveals a subtle rotation of the MnO 6 octahedra and redu…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
Jie Ji、James M. Dickson、Ronald F. Childs 等 4 位作者1999-12-23Macromolecules
A general model for the formation of thin-film composite membranes, that considers both diffusion- and reaction-controlled interfacial polymerization, under non-steady-state conditions, has been developed. Special models for either diffusion-controlled or reaction-controlled interfacial polymerization with steady- and…
Membrane Separation TechnologiesPolymer Surface Interaction StudiesMembrane Separation and Gas Transport
A. K. Das、Helen P. Kilty、P. J. Marto 等 5 位作者1999-12-23ASME Journal of Heat and Mass Transfer
Hydrophobic coatings have been created through self-assembled monolayers (SAMs) on gold, copper, and copper-nickel alloy surfaces that enhance steam condensation through dropwise condensation. The monolayer is formed by chemisorption of alkylthiols on these metal surfaces. Due to their negligible thickness (10–15 Å),…
Surface Modification and SuperhydrophobicityHeat Transfer and Boiling StudiesNanomaterials and Printing Technologies
A. Govindaraj、B. C. Satishkumar、Manashi Nath 等 4 位作者1999-12-23Chemistry of Materials
Nanowires of Au, Ag, Pt, and Pd (1.0−1.4 nm diam) have been produced in the capillaries of single-walled carbon nanotubes (SWNTs). The nanowire is single-crystalline in some cases. Dispersions of the nanowires in alcohol show longitudinal plasmon absorption bands at different wavelengths, suggesting the presence of a…
Carbon Nanotubes in CompositesGraphene research and applicationsNanopore and Nanochannel Transport Studies
Hong Liu、Aniket Bhattacharya、Amitabha Chakrabarti1999-12-22The Journal of Chemical Physics
Results from molecular dynamics simulations of phase separation in a quenched polymer solution are presented for both two- and three-dimensional systems. Simulations clearly demonstrate the existence of a networklike pattern formation at an early to intermediate time regime for sufficiently dense polymer solutions. Th…
Material Dynamics and PropertiesTheoretical and Computational PhysicsBlock Copolymer Self-Assembly