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First Principles Computation of Lattice Energies of Organic Solids: The Benzene Crystal

Ashley Ringer McDonald、C. David Sherrill2008-01-07Chemistry - A European Journal

We provide a first-principles methodology to obtain converged results for the lattice energy of crystals of small, neutral organic molecules. In particular, we determine the lattice energy of crystalline benzene using an additive system based on the individual interaction energies of benzene dimers. Enthalpy correctio…

Phase Equilibria and ThermodynamicsThermal and Kinetic AnalysisChemical Thermodynamics and Molecular Structure

Numerical simulation of plasticity induced crack closure: Identification and discussion of parameters

F.V. Antunes、D.M. Rodrigues2008-01-07Engineering Fracture Mechanics

Numerical studies play a major role in the understanding and prediction of plasticity induced crack closure (PICC). However, the available numerical models can be considered simplifications of reality as they consider discrete crack propagations, relatively high fatigue crack growth rates (FCGR), sharp cracks, and pro…

Fatigue and fracture mechanicsMechanical stress and fatigue analysisMaterial Properties and Failure Mechanisms

Platelet‐rich plasma and platelet gel preparation using Plateltex®

Laura Mazzucco、Valeria Balbo、Elena Cattana 等 4 位作者2008-01-07Vox Sanguinis

BACKGROUND: The platelet gel is made by embedding concentrate platelets within a semisolid (gel) network of polymerized fibrin. It is believed that this blood component will be used more and more in the treatment of several clinical conditions and as an adjunctive material in tissue engineering. Several systems are av…

Surface Modification and SuperhydrophobicityWound Healing and TreatmentsPeriodontal Regeneration and Treatments

Environment‐friendly soy flour‐based resins without formaldehyde

Gisèle Amaral-Labat、A. Pizzi、Adilson R. Gonçalves 等 6 位作者2008-01-07Journal of Applied Polymer Science

Abstract Glyoxalated soy flour adhesives for wood particleboard added with a much smaller proportion of glyoxalated lignin or tannin and without any addition of either formaldehyde or formaldehyde‐based resin are shown to yield results satisfying the relevant standard specifications for interior wood boards. Adhesive…

Natural Fiber Reinforced CompositesPolymer composites and self-healingLignin and Wood Chemistry

Identification of a Novel Pool of Extracellular Pro-myostatin in Skeletal Muscle

Sarah B. Anderson、Alfred L. Goldberg、Malcolm Whitman2008-01-07Journal of Biological Chemistry

Myostatin, a transforming growth factor-beta superfamily ligand, negatively regulates skeletal muscle growth. Generation of the mature signaling peptide requires cleavage of pro-myostatin by a proprotein convertase, which is thought to occur constitutively in the Golgi apparatus. In serum, mature myostatin is found in…

Muscle Physiology and DisordersCardiomyopathy and Myosin StudiesSilk-based biomaterials and applications

Resistive switching memory effect of ZrO2 films with Zr+ implanted

Qi Liu、Weihua Guan、Shibing Long 等 6 位作者2008-01-07Applied Physics Letters

The Au∕Cr∕Zr+-implanted-ZrO2∕n+-Si sandwiched structure exhibits reversible bipolar resistive switching behavior under dc sweeping voltage. The resistance ratio (Rratio) of high resistive state and low resistive state is as large as five orders of magnitude with 0.5V readout bias. Zr+-implanted-ZrO2 films exhibit good…

Advanced Memory and Neural ComputingTransition Metal Oxide NanomaterialsFerroelectric and Negative Capacitance Devices

Diffusion and crystallization mechanisms of Ge∕Au bilayer media for write-once optical disk

Ting Wu、P. C. Kuo、S.L. Ou 等 8 位作者2008-01-07Applied Physics Letters

Ge ∕ Au bilayer thin films were fabricated by magnetron sputtering method, the temperature dependence of resistance from room temperature to 500°C and concentration depth profiles are measured. From the temperature dependence of resistance measurement, we found two phase change phenomena which occurred at 175 and 360°…

Photonic and Optical DevicesPhase-change materials and chalcogenidesSemiconductor Lasers and Optical Devices

Effect of α‐ and β‐nucleating agents on the fracture behavior of polypropylene‐co‐ethylene

Shiwei Wang、Wei Yang、Guan Gong 等 6 位作者2008-01-07Journal of Applied Polymer Science

Abstract The effect of α‐ and β‐nucleating agents (NA) of various amounts on the fracture behavior of polypropylene‐co‐ethylene (CPP) was evaluated using the essential work of fracture (EWF) method. The specific EWF values of CPPs incorporated with α‐NA of different amount were all lower than that of pure CPP, while t…

Mechanical Behavior of CompositesPolymer crystallization and propertiesNatural Fiber Reinforced Composites

Magnetometric Studies of Catalyst Refuses in Nanocarbon Materials

I. V. Ovsienko、L. Matzuy、Nykolai I Zakharenko 等 9 位作者2008-01-07Nanoscale Research Letters

Abstract It is shown that magnetometry can be employed as an effective tool to control the content of a ferromagnetic constituent in nanocarbon materials. We propose a thermochemical treatment protocol to achieve extensive cleaning of the source nanocarbon materials from ferromagnetic refuses.

Carbon Nanotubes in CompositesNuclear Physics and ApplicationsAdvanced Physical and Chemical Molecular Interactions

Immobilisation of η3‐Allyldicarbonyl Complexes of MoII with Bidentate Nitrogen Ligands within Aluminium‐Pillared Clays

João C. Alonso、Patrícia Neves、Carlos M. Silva 等 14 位作者2008-01-07European Journal of Inorganic Chemistry

Abstract Molybdenum(II) complexes [MoX(CO)2(η3‐allyl)(CH3CN)2] (X = Cl or Br) were encapsulated in an aluminium‐pillared natural clay or a porous clay heterostructure and allowed to react with bidentate diimine ligands. All the materials obtained were characterised by several solid‐state techniques. Powder XRD, and 27…

Organometallic Complex Synthesis and CatalysisMetal-Organic Frameworks: Synthesis and ApplicationsMesoporous Materials and Catalysis

Kinetics of capillary wetting in nanoporous films in the presence of surface evaporation

Erkin Şeker、Matthew R. Begley、Michael L. Reed 等 4 位作者2008-01-07Applied Physics Letters

A liquid in contact with a nanoporous Au film forms a halo of constant width around the droplet. Due to the large surface area-to-volume ratio, one would expect either complete wetting or rejection of the liquid. Instead, a stable halo width is observed, depending on pore size, void fraction, film thickness, and the l…

Electrocatalysts for Energy ConversionCopper-based nanomaterials and applicationsNanoporous metals and alloys

Quantitative analysis of ultra thin layer growth by time-of-flight low energy ion scattering

Daniel Primetzhofer、S.N. Markin、P. Zeppenfeld 等 7 位作者2008-01-07Applied Physics Letters

Time of flight low energy ion scattering is used to quantitatively characterize the growth mode of Au deposited on B. Information on the filling factor (surface area coverage) is deduced from the yield of backscattered ions and the spectrum height of scattered neutrals. From the variation of the filling factor with th…

Laser-induced spectroscopy and plasmaElectron and X-Ray Spectroscopy TechniquesIon-surface interactions and analysis

Tuning of the electrical parameters of a twisted-nematic display material by using electron beam irradiation

Ravindra Dhar、Rohit Verma、M.C. Rath 等 7 位作者2008-01-07Applied Physics Letters

Electron beam irradiation studies on 4′-pentyl-4-cyanobiphenyl (5CB) have been carried out. Dielectric measurements demonstrate that even a low level of irradiation (beyond a critical dose of ∼6kGy) results in a dramatic increase in the transverse component of the dielectric permittivity, and a corresponding decrease…

Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsPhotochemistry and Electron Transfer Studies

Tuning in-plane magnetic anisotropy in (110) La2∕3Ca1∕3MnO3 films by anisotropic strain relaxation

I. C. Infante、J. O. Ossó、F. Sánchez 等 4 位作者2008-01-07Applied Physics Letters

We have investigated structural and functional properties of (110) La2∕3Ca1∕3MnO3 films grown on (110) SrTiO3 substrates. We have observed that there is an anisotropic in-plane lattice strain relaxation with faster relaxation along the [1−10] direction than along the [001] one, which leads to an anisotropic in-plane s…

Magnetic properties of thin filmsMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides

Enhanced dielectric properties in single crystal-like BiFeO3 thin films grown by flux-mediated epitaxy

S. H. Lim、Makoto Murakami、Jiaqian Yang 等 8 位作者2008-01-07Applied Physics Letters

We have fabricated single crystal-like BiFeO3 (BFO) thin films by flux-mediated epitaxy using pulsed laser deposition (PLD). The Bi–Cu–O flux composition and its thickness were optimized using composition spread, thickness gradient, and temperature gradient libraries. The optimized BFO thin films grown with this techn…

Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsMagneto-Optical Properties and Applications

Core‐Extended Terrylenetetracarboxdiimides – Novel, Strongly Red Fluorescent Broadband Absorbers

Heinz Langhals、Simon Poxleitner2008-01-07European Journal of Organic Chemistry

Abstract Strongly red fluorescent and broadband absorbing benzoterrylenehexacarboxtriimide (8) and yellow fluorescent dibenzoterryleneoctacarboxtetraimide (9) were prepared by the Diels–Alder reaction of readily soluble terrylenetetracarboxdiimides and subsequent condensation with primary amines. Applications such as…

Porphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer StudiesLuminescence and Fluorescent Materials

Efficient Two‐Step Synthesis of Face‐to‐Face meso‐Substituted Bis(corrole) Dyads

Maya El Ojaimi、Claude P. Gros、Jean‐Michel Barbe2008-01-07European Journal of Organic Chemistry

Abstract The synthesis of face‐to‐face meso‐substituted bis(corrole) systems was revisited. By using a new synthetic pathway, the reaction was generalized to any type of linker and the yield was considerably increased. The dyads were obtained in yields up to 20 % from a dialdehyde linker and dipyrromethane in a one‐st…

Porphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation MechanismsSurface Chemistry and Catalysis

Synthesis and characterization of functionalized biodegradable poly( DL ‐lactide‐co‐RS‐β‐malic acid)

Bin He、Yin Fun Poon、Jie Feng 等 4 位作者2008-01-07Journal of Biomedical Materials Research Part A

Amorphous poly(DL-lactide-co-RS-beta-malic acid) (PDLLMAc) was synthesized by hydrogenolysis of poly(DL-lactide-co-RS-beta-malolactonate) (PDLLMA), which was obtained from the ring-opening polymerization of DL-lactide (DLLA) and RS-beta-benzyl malolactonate (MA) using stannous octoate as the catalyst. The amount of ma…

Bone Tissue Engineering Materialsbiodegradable polymer synthesis and propertiesElectrospun Nanofibers in Biomedical Applications

Self-assembled monolayers of protonated poly(amidoamine) dendrimers on indium tin oxide

Gianluca Latini、M. Wykes、Robert Schlapak 等 5 位作者2008-01-07Applied Physics Letters

We have investigated the change of work function of indium tin oxide (ITO) anodes induced by adsorption of positively charged poly(amidoamine) (PAMAM) dendrimers. Kelvin probe characterization of the functionalized ITO films and electroabsorption measurements on polymer light-emitting diodes incorporating poly(9,9-dio…

Conducting polymers and applicationsMolecular Junctions and NanostructuresDendrimers and Hyperbranched Polymers

Inner-shell charging of multiwalled carbon nanotubes

Mariusz Zdrojek、Thomas M. Heim、David Brunel 等 5 位作者2008-01-07Physical Review B

The electrostatic properties of individual multiwalled carbon nanotubes (MWCNTs) have been investigated from charge injection and electrostatic force microscopy experiments. The MWCNT linear charge densities analyzed as a function of the nanotube diameters are found to differ from classical capacitive predictions by o…

Carbon Nanotubes in CompositesMechanical and Optical Resonators