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Photoinduced grating formation in a polymer containing azo-carbazole dyes

Yutaka Kawabe、Kodai Fukuzawa、Takuya Uemura 等 7 位作者2012-09-19Applied Optics

Although some azo-carbazole derivatives attached on or doped into inert polymers are known to show photorefractive effect without external electric field, the origin of their asymmetric energy transfer in two-beam coupling experiments were unknown. We made the two-beam coupling experiment followed by sample translatio…

Photonic and Optical DevicesPhotorefractive and Nonlinear OpticsOptical Coatings and Gratings

DFT studies of squarylium and core‐substituted squarylium dye derivatives: understanding the causes of the additional shorter wavelength absorption in the latter

Avinash L. Puyad、G. Krishna Chaitanya、Anup Thomas 等 5 位作者2012-09-19Journal of Physical Organic Chemistry

Recent reports indicate that the core‐substituted squarylium (CSQ) dyes (obtained when one oxygen atom of the SQ moiety is replaced by an electron withdrawing group or sulfur) show bathochromic shift of the absorption maxima and an additional shorter wave length absorption in visible when compared to parent SQ dyes. T…

Organic Light-Emitting Diodes ResearchPhotochemistry and Electron Transfer StudiesLanthanide and Transition Metal Complexes

Development of Solar Cells Based on Synthetic Near-Infrared Absorbing Purpurins 2: Use of Fullerene and Its Derivative As Electron Acceptors for Favorable Charge Separation

Yuwei Wang、Xiaofeng Wang、Jianping Zhang 等 9 位作者2012-09-19The Journal of Physical Chemistry C

In order to realize solution-processed, electrolyte-free organic solar cells with near-infrared absorption purpurins, organic semiconductors fullerene C 70 and its derivative PC 70 BM were used instead of inorganic semiconductors TiO 2 and SnO 2 used in our previous publication for dye-sensitized solar cells ( J. Phys…

Organic Electronics and PhotovoltaicsQuantum Dots Synthesis And PropertiesConducting polymers and applications

Influence of the Hydroxyl Position in Racemic Hydroxyoctadecanoic Acids on the Crystallization Kinetics and Activation Energies of Gels and Dispersions in Mineral Oil

Michael A. Rogers、Shibu Abraham、Ferenc Bodondics 等 4 位作者2012-09-19Crystal Growth & Design

Minor changes in molecular structure affect the ability of racemic hydroxyoctadecanoic acids ( n HSA, where n is the position of the hydroxyl group) to form molecular gels in a low polarity liquid, mineral oil, and influence their supramolecular structures. The activation energy and energy released during crystallizat…

Surfactants and Colloidal SystemsPolymer composites and self-healingFood Chemistry and Fat Analysis

POLYURETHANE FOAM AS AGGREGATE FOR THERMAL INSULATING MORTARS AND LIGHTWEIGHT CONCRETE

Vojtěch Václavík、Tomáš Dvorský、Vojtech Dirner 等 5 位作者2012-09-19DSpace VŠB-TUO (VŠB-TUO)

Preliminary notes The contribution describes the use of polyurethane foam after the end of its life cycle as an aggregate both for thermal insulating mortars for various wall surfaces and for lightweight concrete. The structure and the physical and mechanical properties of thermal insulating mortar are described here.…

Concrete and Cement Materials ResearchInnovative concrete reinforcement materialsMagnesium Oxide Properties and Applications

A comparative study of mechanical and tribological properties of poly(ether ether ketone) composites filled by micro- and nano-Ni and ZrO 2 fillers

Bablu Mordina、R.K. Tiwari2012-09-19Journal of Composite Materials

The poly(ether ether ketone) micro/nanocomposite reinforced with N-(2-aminoethyl)-3-aminopropyl triethoxy silane treated micro- and nano-sized nickel and zirconia (0.5, 1, and 3 wt%) were prepared by melt mixing in a co-rotating twin screw extruder followed by test specimen fabrication in microinjection molding. The r…

Polymer Nanocomposites and PropertiesSynthesis and properties of polymersTribology and Wear Analysis

Flashover Rate of 6.6-kV Distribution Line Due to Direct Negative Lightning Return Strokes

Koji Michishita、Yasuji Hongo2012-09-19IEEE Transactions on Power Delivery

The overvoltage associated with direct lightning hits has been the important factor for the insulation design of a 6.6-kV distribution line in Japan. In this paper, the flashover rate of the distribution line associated with direct lightning hits is investigated based on numerical calculations and statistical analysis…

High voltage insulation and dielectric phenomenaLightning and Electromagnetic PhenomenaThermal Analysis in Power Transmission

Progress in Computer Simulation of Bulk, Confined, and Surface‐initiated Polymerizations

Erich D. Bain、Salomon Turgman‐Cohen、Jan Genzer2012-09-19Macromolecular Theory and Simulations

Abstract In this article we provide a brief summary of computational techniques applied to investigate polymerization reactions in general, with a focus on systems under confinement and initiated from surfaces. We concentrate on two major classes of techniques, i.e., stochastic methods and molecular modeling. We descr…

Advanced Polymer Synthesis and CharacterizationBlock Copolymer Self-AssemblyMachine Learning in Materials Science

Computational Investigation of DNA Detection Using Single-Electron Transistor-Based Nanopore

Yan-Dong Guo、Xiaohong Yan、Yang Xiao2012-09-19The Journal of Physical Chemistry C

We propose a single-electron transistor (SET)-based nanopore sensor for DNA sequencing, which consists of source, drain, and gate electrodes, as well as a nanopore where the DNA molecule is pulled through. For nanopore sensors based on transverse electronic transport, generally, the tunneling current is relatively sma…

Graphene research and applicationsAdvancements in Semiconductor Devices and Circuit DesignNanopore and Nanochannel Transport Studies

Magnetic Soft Modes in the Distorted Triangular Antiferromagnet α − CaCr 2 O 4

S. Tóth、B. Lake、K. Hradil 等 7 位作者2012-09-19Physical Review Letters

In this Letter, we explore the phase diagram and excitations of a distorted triangular lattice antiferromagnet. The unique two-dimensional distortion considered here is very different from the ``isosceles''-type distortion that has been extensively investigated. We show that it is able to stabilize a $120\ifmmode^\cir…

Physics of Superconductivity and MagnetismMultiferroics and related materialsAdvanced Condensed Matter Physics

Study of the Steinmetz Circuit Influence on AC Traction System Resonance

Luis Sainz、Lluís Monjo、S. Riera 等 4 位作者2012-09-19IEEE Transactions on Power Delivery

Traction systems are single-phase, nonlinear loads, which can unbalance and pollute supply voltages. To reduce voltage unbalance, reactances are usually connected in delta configuration with traction systems. This setup is called the Steinmetz circuit. Parallel and series resonances can occur between the Steinmetz cap…

Power Quality and HarmonicsMagnetic Properties and ApplicationsElectromagnetic Compatibility and Noise Suppression

Resolving a paradox of anomalous scalings in the diffusion of granular materials

Ivan C. Christov、Howard A. Stone2012-09-19Proceedings of the National Academy of Sciences

Granular materials do not perform Brownian motion, yet diffusion can be observed in such systems when agitation causes inelastic collisions between particles. It has been suggested that axial diffusion of granular matter in a rotating drum might be "anomalous" in the sense that the mean squared displacement of particl…

Material Dynamics and PropertiesGranular flow and fluidized bedsParticle Dynamics in Fluid Flows

Narrow molecular weight and particle size distributions of polystyrene 4-arm stars synthesized by RAFT-mediated miniemulsions

Hazit A. Zayas、Nghia P. Truong、David Valade 等 5 位作者2012-09-19Polymer Chemistry

There are no reports of star polymers synthesized by reversible addition–fragmentation chain transfer (RAFT) polymerization in aqueous dispersions (e.g. emulsion, miniemulsions). In this work, we used two RAFT agents to produce linear and 4-arm star polymers in a well-controlled miniemulsion system using conventional…

Advanced Polymer Synthesis and CharacterizationSurfactants and Colloidal SystemsDendrimers and Hyperbranched Polymers

Probing orbital fluctuations in R VO 3 ( R = Y, Gd, or Ce) by ellipsometry

Julia Reul、Agustinus Agung Nugroho、T. T. M. Palstra 等 4 位作者2012-09-19Physical Review B

We study optical excitations across the Mott gap in the multiorbital Mott-Hubbard insulators $R$VO${}_{3}$. The multipeak structure observed in the optical conductivity can be described consistently in terms of the different $3{d}^{3}$ multiplets or upper Hubbard bands. The spectral weight is very sensitive to nearest…

Magnetic and transport properties of perovskites and related materialsTransition Metal Oxide NanomaterialsAdvanced Condensed Matter Physics

One-way transmission of linearly polarized light in plasmonic subwavelength metallic grating cascaded with dielectric grating

Zhihong Zhu、K. Liu、Wei Xu 等 9 位作者2012-09-19Optics Letters

We show that optical transmission of linearly polarized light through a plasmonic subwavelength metallic grating cascaded with a dielectric grating at a 45° angle to each other is asymmetric in opposite directions. A key characteristic of this asymmetric transmission is that the polarization of the transmitted light i…

Photonic and Optical DevicesPhotonic Crystals and ApplicationsOptical Coatings and Gratings

Electron-Phonon Coupling in Crystalline Organic Semiconductors: Microscopic Evidence for Nonpolaronic Charge Carriers

Nenad Vukmirović、Christoph Bruder、Vladimir M. Stojanović2012-09-19Physical Review Letters

We consider electron-phonon coupling in crystalline organic semiconductors, using naphthalene for our case study. Employing a first-principles approach, we compute the changes in the selfconsistent Kohn-Sham potential corresponding to different phonon modes and go on to obtain the carrier-phonon coupling matrix elemen…

Organic Electronics and PhotovoltaicsConducting polymers and applicationsOrganic and Molecular Conductors Research

Fast-Response and Low-Afterglow Cerium-Doped Lithium 6 Fluoro-Oxide Glass Scintillator for Laser Fusion-Originated Down-Scattered Neutron Detection

Takahiro Murata、Yasunobu Arikawa、Kozue Watanabe 等 21 位作者2012-09-19IEEE Transactions on Nuclear Science

Scintillation properties of Ce3+-doped 20Al(PO3)3-80LiF glasses were investigated in order to seek a candidate for down-scattered neutron scintillator in nuclear fusion diagnostics. The decay constant of APLF80 + 3Ce with 5.5 MeV alpha particles from241Am radioisotope excitation was measured to be 32.1 ns. Moreover, s…

Radiation Detection and Scintillator TechnologiesNuclear Materials and PropertiesNuclear Physics and Applications

Control of Low-Density Lipoprotein Concentration in the Arterial Wall by Proportional Drug-Encapsulated Nanoparticles

Alireza Rowhanimanesh、Mohammad-R. Akbarzadeh-T2012-09-19IEEE Transactions on NanoBioscience

Atherosclerosis, or hardening of the arteries, is one of the major causes of death in humans. High accumulation of Low-Density Lipoprotein (LDL) macromolecules within the arterial wall plays a critical role in initiation and development of atherosclerotic plaques. This paper proposes a proportional drug-encapsulated n…

Nanoparticle-Based Drug DeliveryAdvanced Fluorescence Microscopy TechniquesMicro and Nano Robotics

Possible Quantum Diffusion of Polaronic Muons in Dy2Ti2O7 Spin Ice

P. Quémerais、P. A. McClarty、Roderich Moessner2012-09-19Physical Review Letters

We interpret recent measurements of the zero field muon relaxation rate in the magnetic pyrochlore Dy(2)Ti(2)O(7) as resulting from the quantum diffusion of muons in the material. In this scenario, the plateau observed at low temperature (< 7 K) in the relaxation rate is due to coherent tunneling of muons through a sp…

Physics of Superconductivity and MagnetismAdvanced Condensed Matter PhysicsNuclear materials and radiation effects

Towards a Nitinol Actuator for an Active Surgical Needle

Naresh V. Datla、Mohammad Honarvar、Tuan M. Nguyen 等 9 位作者2012-09-19Volume 2: Mechanics and Behavior of Active Materials; Integrated System Design and Implementation; Bio-Inspired Materials and Systems; Energy Harvesting

Surgical needles, for safe and accurate percutaneaous interventions, need to be navigated accurately through the tissue and placed precisely at the targets. A novel active needle, using Nitinol wires as actuators, has been proposed to navigate the needle within the tissue. In this design, when temperature of Nitinol w…

Ferroelectric and Piezoelectric MaterialsShape Memory Alloy TransformationsSoft Robotics and Applications