Fabrice Odobel、Hervé Zabri2005-07-08Inorganic Chemistry
This paper describes the synthesis of a new series of molecules composed of a ruthenium cation liganded by a chloro or a thiocyanato, a 4,4'-(diethoxycarbonyl)-2,2'-bipyridine, and a 2,2':6',2' '-terpyridine substituted in its 4' position by a difluoroborazaindacene or a zinc phthalocyanine. A set of conditions are re…
Organic Light-Emitting Diodes ResearchPorphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent Materials
N. E. Christensen、A. Svane、E. L. Peltzer y Blancá2005-07-08Physical Review B
Pressure-induced changes in the electronic and structural properties of tin monoxide are examined by means of ab initio density-functional calculations. Also, the pressure shifts of the ${A}_{1g}$ and ${E}_{g}$ zone-center phonon modes are derived. The results are compared to recent experimental high-pressure data as…
ZnO doping and propertiesGas Sensing Nanomaterials and SensorsElectronic and Structural Properties of Oxides
Xiaoyi Hu、Barbara A. Lawrence、Kristin Kohler 等 8 位作者2005-07-08Biochemistry
Araneoid spiders use specialized abdominal glands to manufacture up to seven different protein-based silks/glues that have diverse physical properties. The fibroin sequences that encode egg case fibers (cover silk for the egg case sac) and the secondary structure of these threads have not been previously determined. I…
Antimicrobial Peptides and ActivitiesSilk-based biomaterials and applicationsSpider Taxonomy and Behavior Studies
G. Aravinthan、D. D. Kale2005-07-08Journal of Applied Polymer Science
Abstract Commercial grade poly(ethylene terephthalate), (PET, intrinsic viscosity = 0.80 dL/g) and poly(butylene terephthalate), (PBT, intrinsic viscosity = 1.00 dL/g) were melt blended over the entire composition range using a counterrotating twin‐screw extruder. The mechanical, thermal, electrical, and rheological p…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Chi‐Kuang Sun、Shih-Ze Sun、Kung‐Hsuan Lin 等 7 位作者2005-07-08Applied Physics Letters
Free exciton and above-band-gap free carrier dynamics in ZnO nanorods have been investigated at room temperature with a femtosecond transient transmission measurement. Following the photoexcitation of above-band-gap free carriers, an extremely fast external thermalization time on the order of 200 fs can be observed. U…
ZnO doping and propertiesGaN-based semiconductor devices and materialsPerovskite Materials and Applications
Arianna Friggeri、Cornelia van der Pol、Kjeld J. C. van Bommel 等 7 位作者2005-07-08Chemistry - A European Journal
Seven new 1,3,5-cyclohexyltricarboxamide-phenylalanine derivatives were synthesized in order to investigate the effect of the amino acid chirality on the gelating properties of these small molecules in water. Gelation tests have shown that enantiomerically pure homochiral 1,3,5-cyclohexyltricarboxamide-L-phenylalanine…
Lipid Membrane Structure and BehaviorGlycosylation and Glycoproteins ResearchSupramolecular Self-Assembly in Materials
César Magén、L. Morellón、P. A. Algarabel 等 11 位作者2005-07-08Physical Review B
Magnetic and structural properties of single crystalline ${\mathrm{Gd}}_{5}{\mathrm{Si}}_{2}{\mathrm{Ge}}_{2}$ under hydrostatic pressure have been characterized by using magnetization, linear thermal expansion, and compressibility measurements. A strong dependence of Curie temperature on pressure, $d{T}_{C}∕dP=+4.8\p…
Magnetic and transport properties of perovskites and related materialsCrystal Structures and PropertiesAdvanced Condensed Matter Physics
Mohammad S. M. Saifullah、K. R. V. Subramanian、Dae Joon Kang 等 7 位作者2005-07-08Advanced Materials
An electron-beam-sensitive zinc naphthenate resist is used to pattern ZnO. Features as small as 7 nm and with an aspect ratio of ∼ 9 can be patterned. Size reduction to ∼ 5 nm is observed when these patterns are heat treated to give crystalline ZnO (see Figure). The functionality of ZnO is confirmed via photoluminesce…
ZnO doping and propertiesCopper-based nanomaterials and applicationsElectronic and Structural Properties of Oxides
Vincent Meunier、Bobby G. Sumpter2005-07-08The Journal of Chemical Physics
In order to investigate and optimize the electronic transport processes in carbon nanotubes doped with organic molecules, we have performed large-scale quantum electronic structure calculations coupled with a Green's function formulation for determining the quantum conductance. Our approach is based on an original sch…
Carbon Nanotubes in CompositesGraphene research and applicationsMolecular Junctions and Nanostructures
Elisabetta Brown、Ling Hao、John Gallop 等 4 位作者2005-07-08Applied Physics Letters
We report thermal measurements on individual carbon nanotubes using a temperature sensing scanned microscope probe. An arc-grown bundle of multiwalled nanotubes (MWNTs) is mechanically attached to a thermal probe. The heat flow down individual MWNTs is recorded as a function of the temperature difference across them.…
Carbon Nanotubes in CompositesThermal properties of materialsMechanical and Optical Resonators
Hani E. Naguib、Chul B. Park、Seungwon Song2005-07-08Industrial & Engineering Chemistry Research
The thermal behaviors of linear and branched polypropylene (PP) with foaming additives were investigated using a normal and a high-pressure differential scanning calorimeter (DSC). Specifically, the effects of material branching, dispersed additives, cooling rates, and dissolved blowing agents on the crystallization t…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesPolymer Foaming and Composites
E. T. J. Klompen、Tom A. P. Engels、van Lca Lambèrt Breemen 等 6 位作者2005-07-08Macromolecules
Time-to-failure of polymers, and the actual failure mode, are influenced by stress, temperature, processing history, and molecular weight. We show that long-term ductile failure under constant load is governed by the same process as short term ductile failure at constant rate of deformation. Failure proves to originat…
Polymer crystallization and propertiesRheology and Fluid Dynamics StudiesElectrostatic Discharge in Electronics
Meiyong Liao、Yasuo Koide、José Alvarez2005-07-08Applied Physics Letters
We have developed a thermally stable, deep-ultraviolet (DUV) photodiode using tungsten carbide (WC) Schottky and Ti/WC ohmic contacts for a boron-doped homoepitaxial p-diamond epilayer. Effects of thermal annealing in an argon ambient on the electrical and photoresponse properties were investigated. Annealing at tempe…
Semiconductor materials and devicesDiamond and Carbon-based Materials ResearchNanowire Synthesis and Applications
R. L. Satet、Michael J. Hoffmann2005-07-08Journal of the American Ceramic Society
Silicon nitride bulk ceramics with varying compositions of the grain boundary phase but similar grain sizes were developed, which allows to analyze the influence of the grain boundary chemistry on mechanical properties. Micrographs of the crack path reveal a much weaker interface when the rare‐earth element in the gra…
Advanced ceramic materials synthesisMetal and Thin Film MechanicsBoron and Carbon Nanomaterials Research
Daniel Brandl、Chris Oubre、Peter Nordlander2005-07-08The Journal of Chemical Physics
We extend the plasmon hybridization method to investigate the plasmon modes of metallic nanoshell dimers. The formalism is also generalized to include the effects of dielectric backgrounds. It is shown that the presence of dielectrics shifts the plasmon resonances of the individual nanoparticles to lower energies and…
Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchNonlinear Optical Materials Studies
Tsung‐Yu Tsai、Chii‐Horng Li、Chiung‐Hsin Chang 等 6 位作者2005-07-08Advanced Materials
Poly(ethylene terephthalate) (PET)/clay nanocomposites are prepared by intercalation of a catalyst precursor and an organic modifier, followed by the polymerization of monomers between the adjacent clay layers. The mechanical properties, thermal deformation temperature, anti-UV-radiation properties, CO2 gas-barrier pr…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Wanvimon Arayapranee、Nuchanat Na‐Ranong、Garry L. Rempel2005-07-08Journal of Applied Polymer Science
Abstract Rice husk ash (RHA) obtained from agricultural waste, by using rice husk as a power source, is mainly composed of silica and carbon black. A two‐stage conventional mixing procedure was used to incorporate rice husk ash into natural rubber. For comparison purposes, two commercial reinforcing fillers, silica an…
Concrete and Cement Materials ResearchPolymer Nanocomposites and PropertiesInnovative concrete reinforcement materials
Lei Zhang2005-07-08Applied Physics Letters
The ac conductivity of CaCu3Ti4O12 (CCTO) ceramics was studied in the temperature range 173<T<443K. The dc conductivities containing the components of electrodes (σe) and grain boundaries (σgb) were measured, from which a thermal activation energies of ∼0.54eV was inferred. Different behaviors of dielect…
Ferroelectric and Piezoelectric MaterialsMicrowave Dielectric Ceramics SynthesisDielectric properties of ceramics
Ichiro Nagai、Naoki Shirakawa、S. Ikeda 等 6 位作者2005-07-08Applied Physics Letters
Single crystals of a highly conductive oxide SrMoO3 have been grown by a floating-zone method under argon atmosphere with ultralow oxygen partial pressure p(O2)∼10−25atm. The obtained single crystals of SrMoO3 reveal quite low resistivity at 300 K ρ(300K)=5.1μΩcm, which is the lowest to date in the values of ρ(300K) o…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsElectronic and Structural Properties of Oxides
Pu Gao、Zhong Lin Wang2005-07-08Small
Pre-growth pressure control in a solid–vapor process leads to the synthesis of single-crystal ZnO nanosprings at high yield (>50 %). This study demonstrates the possibility of synthesizing nanosprings (see image) of high purity and at high yield, and makes systematic understanding of the properties and exploration of…
ZnO doping and propertiesGas Sensing Nanomaterials and SensorsGa2O3 and related materials