Dirk M. Guldi、Chuping Luo、Maurizio Prato 等 9 位作者2001-08-23Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTParallel (Face-to-Face) Versus Perpendicular (Edge-to-Face) Alignment of Electron Donors and Acceptors in Fullerene Porphyrin Dyads: The Importance of Orientation in Electron TransferDirk M. Guldi, Chuping Luo, Maurizio Prato, Alessandro Troisi, Francesco Zerbetto, Mic…
Porphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer StudiesSynthesis and Properties of Aromatic Compounds
Hsin‐Lung Chen、Ja-Chi Wu、Tsang‐Lang Lin 等 4 位作者2001-08-23Macromolecules
We studied the crystallization kinetics in a diblock copolymer system exhibiting different mesophase structures in the melt. A symmetric poly(ethylene oxide)- block -poly(1,4-butadiene) (PEO- b -PB) was blended with a low molecular weight PB homopolymer to yield the block copolymer blends containing lamellar, cylindri…
Polymer crystallization and propertiesAdvanced Polymer Synthesis and CharacterizationBlock Copolymer Self-Assembly
Travis S. Bailey、Hoai D. Pham、Frank S. Bates2001-08-23Macromolecules
We report on the characterization of the morphological behavior expressed between the symmetric AB diblock and ABC triblock copolymer states. Experimentally, a gradual transformation between these states was achieved through systematic addition of PEO to a single symmetric PS−PI diblock copolymer (MW ∼ 18 800 g/mol),…
Advanced Polymer Synthesis and CharacterizationSurfactants and Colloidal SystemsBlock Copolymer Self-Assembly
Philip B. Allen2001-08-23arXiv
Resistivity of metals is commonly observed either to 'escalate' beyond the Ioffe-Regel limit (mean free path l equal to lattice constant a) or to 'saturate' at this point. It is argued that neither behavior is well-understood, and that 'escalation' is not necessarily more mysterious than 'saturation.'
Materials ScienceStrongly Correlated Electrons
Jean-Paul Crocombette、F. Jollet、L. Thien Nga 等 4 位作者2001-08-23Physical review. B, Condensed matter
A study on uranium and oxygen point defects in uranium dioxide using the ab initio plane-wave pseudopotential method in the local density approximation of the density functional theoretical framework is presented. Norm conserving pseudopotentials are used to describe oxygen and uranium atoms. The uranium pseudopotenti…
Nuclear reactor physics and engineeringNuclear Materials and PropertiesThermodynamic and Structural Properties of Metals and Alloys
T. Mueller、K. -H. Heinig、B. Schmidt2001-08-23arXiv
The fabrication of more and more miniaturized electronic and photonic devices relies on new, ingenious methods for the fabrication of spatially controlled nanostructures. Examples are electronic devices based on semiconducting nanowires and photonic devices based on chains of metallic nanoclusters that guide light by…
Materials Science
G. Cuniberti、R. Gutierrez、G. Fagas 等 6 位作者2001-08-23arXiv
We have investigated the electronic properties of a C_60 molecule in between carbon nanotube leads. This problem has been tackled within a quantum chemical treatment utilizing a density functional theory-based LCAO approach combined with the Landauer formalism. Owing to low-dimensionality, electron transport is very s…
Mesoscale and Nanoscale PhysicsMaterials Science
作者信息未提供2001-08-23OpenAlex
CONTRIBUTORS. PART I INTRODUCTION TO NANOMATERIALS. 1 Introduction to Nanoscale Materials in Chemistry, Edition II ( Ryan M. Richards ). 2 Unique Bonding in Nanomaterials and Powders ( Keith P. McKenna ). 3 Particles as Molecules ( C. M. Sorensen ). PART II NEW SYNTHETIC METHODS TO NANOMATERIALS. 4 Microwave Preparati…
Advanced Physical and Chemical Molecular InteractionsChemical and Physical Properties of MaterialsMetallurgical and Alloy Processes
Edward A. Sechkar、Greg Tollis、Joyce A. Dever 等 5 位作者2001-08-222001 Conference and Exhibit on International Space Station Utilization
Seventy-nine samples of polymer film thermal control (PFTC) materials have been provided by the National Aeronautics and Space Administration (NASA) Glenn Research Center (GRC) for exposure to the low Earth orbit environment on the exterior of the International Space Station (ISS) as part of the Materials Internationa…
Silicone and Siloxane ChemistrySpacecraft Design and TechnologySpace Exploration and Technology
Joerg Bischoff、Róbert Brunner、Joachim Bauer 等 4 位作者2001-08-22Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE
Optical overlay measurement methods are very effective since they are rapid and non-destructive. Imaging techniques need sophisticated image processing and suffer from the wave- optical resolution drawback. Presently, leading edge devices are offered with 5 though 10 nm measuring accuracy. In this paper a method is pr…
Optical Coatings and GratingsNear-Field Optical MicroscopySurface Roughness and Optical Measurements
Carolyn Kaminski、Laura M. Marx、Douglas Wright 等 9 位作者2001-08-222001 Conference and Exhibit on International Space Station Utilization
Forty-one different polymers are being exposed to the low Earth orbit (LEO) environment on the exterior of the International Space Station (ISS) for one year as part of MISSE (Materials International Space Station Experiment). MISSE is a materials flight experiment sponsored by the Air Force Research Lab/Materials Lab…
Gas Dynamics and Kinetic TheorySilicone and Siloxane ChemistrySpace Exploration and Technology
John S. Villarrubia、András Vládar、Jeremiah R. Lowney 等 4 位作者2001-08-22Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE
In a scanning electron microscope (SEM) top-down secondary electron image, areas within a few tens of nanometers of the line edges are characteristically brighter than the rest of the image. In general, the shape of the secondary electron signal within such edge regions depends upon the energy and spatial distribution…
Advanced Electron Microscopy Techniques and ApplicationsAdvancements in Photolithography TechniquesElectron and X-Ray Spectroscopy Techniques
M. Bacci、Simone Porcinai、E. Mihóková 等 5 位作者2001-08-22Physical review. B, Condensed matter
Tetrahedral complexes with an excited state consisting of two closely lying triplet states are considered. The full interaction Hamiltonian, including ligand field, Jahn-Teller, pseudo-Jahn-Teller, and spin-orbit interactions is constructed. The emission-band shape is numerically calculated within the semiclassical ap…
Luminescence Properties of Advanced MaterialsPerovskite Materials and ApplicationsLanthanide and Transition Metal Complexes
Mohammad Hemmati、H. Nazokdast、Hadi Panahi2001-08-22Journal of Applied Polymer Science
Abstract The composition effect on morphology of polypropylene/ethylene–propylene–diene terpolymer/polyethylene (PP/EPDM/PE) and polypropylene/ethylene–propylene–diene terpolymer/polystyrene (PP/EPDM/PS) ternary blends has been investigated. In all of the blends, polypropylene as the major phase was blended with two m…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Xiubin Zhang、Ze‐Sheng Li、Zhong‐Yuan Lu 等 4 位作者2001-08-22The Journal of Chemical Physics
By means of molecular dynamics simulation, the crystallization process of the copolymer (ethylene-co-propene) with different branch distributions is studied at the molecular level. It is shown that subglobules formed at the branch sites along the copolymer chains and subsequently coalesced into a single globule and th…
Carbon Nanotubes in CompositesPolymer crystallization and propertiesRheology and Fluid Dynamics Studies
Oliver S. Wenger、Rafael Valiente、Hans U. Güdel2001-08-22The Journal of Chemical Physics
The T2g4→4A2g luminescence of a 4.1% Cr3+ doped Cs2NaScCl6 crystal is studied as a function of hydrostatic pressure at room temperature and 15 K. The vibrational fine structure observed in the low-temperature variable pressure emission spectra is analyzed with a two configurational coordinate approach, involving the t…
Luminescence Properties of Advanced MaterialsPerovskite Materials and ApplicationsSolid-state spectroscopy and crystallography
Charles H. Hervoches、John T. S. Irvine、Philip Lightfoot2001-08-22Physical review. B, Condensed matter
${\mathrm{Sr}}_{0.85}{\mathrm{Bi}}_{2.1}{\mathrm{Ta}}_{2}{\mathrm{O}}_{9}$ is shown, by Rietveld refinement of powder neutron-diffraction data, to undergo two phase transitions at elevated temperature. The low-temperature ferroelectric phase (space group ${A2}_{1}am)$ transforms to a paraelectric phase (Amam) at ${T}_…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsMicrowave Dielectric Ceramics Synthesis
S. B. Dugdale、T. Jarlborg2001-08-22Physical review. B, Condensed matter
The electronic structure of the newly discovered superconducting perovskite ${\mathrm{MgCNi}}_{3}$ is calculated using the LMTO method. The states near the Fermi energy are found to be dominated by $\mathrm{Ni}\ensuremath{-}d.$ The Stoner factor is low while the electron-phonon coupling constant is estimated to be abo…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsThermal Expansion and Ionic Conductivity
Thong‐Yueh Lin、Minhua Chen、Tse‐Chuan Chou2001-08-22Journal of Applied Polymer Science
Abstract Postpolymerization of dimethylaminoethylmethacrylate‐methyl chloride (DMAEM‐MC) electropolymerization, with Sn +2 /EDTA as initiator, was studied. The factors that affect the stable average molecular weight of the polymer (MW ∞ ) created by postpolymerization were investigated. The results indicate that the m…
Fuel Cells and Related MaterialsConducting polymers and applicationsSynthesis and properties of polymers
Belkıs Ustamehmetoğlu、Nilgün Kızılcan、A. Sezai̇ Saraç 等 4 位作者2001-08-22Journal of Applied Polymer Science
Abstract A new class of dimethyl formamide (DMF)– and acetone‐soluble conducting pyrrole–ketonic resin copolymers has been developed. This was accomplished by oxidatively polymerizing pyrrole monomer by Ce(IV) salt in the presence of methyl ethyl ketone formaldehyde resin (MEKF–R). The resulting copolymers were readil…
Conducting polymers and applicationsElectrochemical Analysis and ApplicationsAnalytical Chemistry and Sensors