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Transmission resonances in a symmetry-broken square coaxial aperture in a metal film

Meng‐Dong He、Jian-Qiang Liu、Kaijun Wang2012-08-08Journal of Physics D Applied Physics

Abstract We present a computational study of the transmission resonances in a symmetry-broken square coaxial aperture with an inserted particle offset (δ) from the centre. According to the distribution characteristics of oscillating charges on the exit surface, the TE11- and TE21-like mode resonances in the hole may b…

Plasmonic and Surface Plasmon ResearchOptical Coatings and GratingsNear-Field Optical Microscopy

Treating the Leading Killer

Karen L. Christman2012-08-08Science Translational Medicine

Injection of a growth factor in a self-assembling nanofiber scaffold has the potential to create a suitable microenvironment and recruit endogenous cells for cardiac repair (Lin et al., this issue).

Electrospun Nanofibers in Biomedical ApplicationsCongenital heart defects researchTissue Engineering and Regenerative Medicine

Measurements of neutral density profiles using a deuterium Balmer-alpha diagnostic in the C-2 FRC plasma

D. Gupta、B. H. Deng、K. Knapp 等 5 位作者2012-08-08Review of Scientific Instruments

In C-2 field-reversed configuration (FRC) device, low neutral density outside the FRC separatrix is required to minimize the charge exchange loss of fast particles. Titanium gettering is used in C-2 to reduce the wall recycling and keep the neutral density low in plasma edge. The measurements of neutral density radial…

Magnetic confinement fusion researchFusion materials and technologiesPlasma Diagnostics and Applications

Synthesis of branched azo dyes based on benzene sulphonamide intermediates and their spectral properties

Feng Wang、Limin Wang、Xiaofei Cai 等 9 位作者2012-08-08Coloration Technology

Benzene sulphonamide intermediates and two series of branched azo dyes (one series with H‐Acid as the coupling component, and the other, with a pyrazolone derivative as the coupling component) derived from them were synthesised. The molecular structures, spectroscopic properties and dyeing properties of the dyes obtai…

Dyeing and Modifying Textile FibersPhotochromic and Fluorescence ChemistryNonlinear Optical Materials Studies

Phosph(on/in)ate-Bridged Vanadium(IV) Dimers: Synthesis and Characterization

A.E. Anderson、M.P. Weberski、C.C. McLauchlan2012-08-08Inorganic Chemistry

A series of dinuclear organophosphorus-bridged complexes of the general formula {(LVO(μ-O(2)PRR')}(2) [L = η(5)-cyclopentadienyltris(diethylphosphito-κ(1)P) cobaltate(III)] has been synthesized as a structural model for the industrially used vanadium phosphate oxidation catalysts. These dimeric species contain two van…

Magnetism in coordination complexesPolyoxometalates: Synthesis and ApplicationsVanadium and Halogenation Chemistry

Solution Phase Photolysis of 1,2-Dithiane Alone and with Single-Walled Carbon Nanotubes

Paul S. Engel、Vittal B. Gudimetla、Jorge S. Gancheff 等 4 位作者2012-08-08The Journal of Physical Chemistry A

Photolysis of 1,2-dithiane (1) in acetonitrile with single walled carbon nanotubes (SWCNTs) was earlier reported to form thiol-functionalized SWCNTs via the butane-1,4-dithiyl diradical (2). The present study shows that 2 instead undergoes a facile rearrangement to thiophane-2-thiol (6). This photoreaction is clean, r…

Carbon Nanotubes in CompositesPorphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer Studies

Sputter power and sputter pressure influenced structural and optical behaviour of RF sputtered nanocrystalline ZnO films

Ramakrishna Reddy、A. Sivasankar Reddy、B. Radhakrishna 等 4 位作者2012-08-08Crystal Research and Technology

Abstract Zinc oxide thin films were deposited on p‐type (100) silicon and Corning glass substrate by using RF magnetron sputtering at different sputter powers range 100–200 W and sputter pressures range 2–8 Pa. The deposited films were characterized by X‐ray diffraction, atomic force microscopy, scanning electron micr…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsCopper-based nanomaterials and applications

Performance of Cu-coated vanadium cans forin situneutron powder diffraction experiments on hydrogen storage materials

Roxana Flacau、Jim Bolduc、Thomas Bibienne 等 5 位作者2012-08-08Journal of Applied Crystallography

In situneutron powder diffraction (NPD) measurements of hydrogenation processes taking place at high temperatures pose difficulties related to the choice of sample can material. This article describes a simple design for a copper-coated vanadium can and its connection to the gas-handling system, tested up to 523 K. Hi…

Hydrogen Storage and MaterialsHybrid Renewable Energy SystemsSpacecraft and Cryogenic Technologies

Synthesis and characterization of CdSe/ZnS core‐shell quantum dots immobilized on solid substrates through laser irradiation

E. M. Gyorgy、Ángel Pérez del Pino、Jaume Roqueta 等 7 位作者2012-08-08physica status solidi (a)

Abstract CdSe/ZnS core‐shell quantum dots (QDs) have been immobilized onto solid substrates by matrix assisted pulsed laser evaporation (MAPLE). An UV KrF* (λ = 248 nm, τFWHM ≅ 25 ns) excimer laser source was used for irradiations of the composite MAPLE targets. The targets were prepared by the dispersion of the CdSe/…

Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films

Contributions of phase composition and defect structure to the long term stability of Li/MgO catalysts

Ulla Simon、Manuel Harth、Sebastian Arndt 等 8 位作者2012-08-08International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde)

Abstract The phase composition and defect structure of the system Li2O–MgO was investigated in terms of the long term stability of Li/MgO catalysts. The Li content was varied from 0 to 7 mol.%. Pure Li · MgO solid solutions were prepared via a special washing procedure. Li contents below 0.04 wt.% were stabilized with…

Catalytic Processes in Materials ScienceZeolite Catalysis and SynthesisCatalysis and Oxidation Reactions

Cross‐Sectional Characterization of Electrodeposited, Monocrystalline Au Nanowires in Parallel Arrangement

Manuel Schneckenburger、Marion Kelsch、Peter A. van Aken 等 6 位作者2012-08-08Small

Cross-sections of cylindrically shaped nanowires are fabricated using a focused ion beam technique. They are oriented such that the electron beam direction is parallel to a low-index zone axis for high- resolution imaging. In this configuration the direction of gold nanowire growth can be determined using electron dif…

Advanced Electron Microscopy Techniques and ApplicationsAnodic Oxide Films and NanostructuresSurface and Thin Film Phenomena

Hydrothermal conversion of ZnO2 to ZnO flowers: A mechanistic investigation and characterization

Pallellappa Chithaiah、S. Ashoka、Kumarappa Veerappa Thipperudraiah 等 4 位作者2012-08-08Crystal Research and Technology

Abstract In this article, we report a novel but simple method for the phase transformation of ZnO2 to flower‐like ZnO microstructures hydrothermally at 90 °C with and without the assistance of hexadecylamine as surfactant. The generation of zincate ion ZnO\documentclass{article}\usepackage{amssymb}\begin{document}\pag…

ZnO doping and propertiesPerovskite Materials and ApplicationsGa2O3 and related materials

Deposition of PLA/CDHA composite coating via electrospraying

Huan Zhou、Sarit B. Bhaduri2012-08-08Journal of Biomaterials Science Polymer Edition

Composite coatings composed of carbonated calcium deficient hydroxyapatite (CDHA) and polylactic acid (PLA) were deposited on a PLA substrate surface via electrospraying. The operation parameters, structural properties, bioactivity, cell adhesion, and growth capability of as-fabricated PLA/CDHA coatings were investiga…

Bone Tissue Engineering Materialsbiodegradable polymer synthesis and propertiesGraphene and Nanomaterials Applications

Dosimetric features and kinetic analysis of thermoluminescence from ultra-high molecular weight polyethylene

M.L. Chithambo2012-08-08Journal of Physics D Applied Physics

Abstract Thermoluminescence (TL) from beta irradiated ultra-high molecular weight polyethylene has been studied for measurements between 30 and 200 °C. An aliquot studied in this work produced TL glow curves consisting of two peaks, the main peak at 88 °C and a weaker intensity peak at 148 °C for heating at 1 °C s−1 f…

Luminescence Properties of Advanced MaterialsAnalytical Chemistry and SensorsPolymer Nanocomposite Synthesis and Irradiation

Intercalation of l -Alanyl-Glutamine Dipeptide into Layered Double Hydroxides: Configuration Stabilization in Confined Interlayer Region

Yongliao Wang、Pingxiao Wu、Yakun Hou 等 5 位作者2012-08-08Industrial & Engineering Chemistry Research

In this paper, an unstable chiral drug l -alanyl-glutamine ( l -(Ala-Gln)) was intercalated into layered double hydroxides (LDHs) and a systematic study combining experimental and theoretical investigation was carried out. Structural characterization reveals the microstructure of LDHs and properties of the intercalate…

Advanced Photocatalysis TechniquesLayered Double Hydroxides Synthesis and ApplicationsInorganic Fluorides and Related Compounds

Magneto-optical spectrum of Mn-doped CdS nanorods

Wen Xiong2012-08-08Journal of Physics D Applied Physics

Abstract The electronic structure of CdS nanorods doped with manganese ions in the magnetic field is calculated based on the effective-mass theory, the conduction and valence subbands are found to be non-degenerate in Mn-doped CdS nanorods, the split energies of the valence subbands increase as the increment of the co…

ZnO doping and propertiesQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films

Growing Suspended Graphene on C60 Molecules

Jiong Lu、Yi Zheng、Anastassia Sorkin 等 4 位作者2012-08-08Small

The coverage- and temperature-dependent phases of C60 film on Ru are studied using STM. The slow decomposition of C60 molecules into carbon clusters overlaps with the fast crystallization of the clusters to form graphene, giving rise to a unique graphene-on-C60 structure. With further thermal activation, the decomposi…

Graphene research and applicationsMolecular Junctions and NanostructuresFullerene Chemistry and Applications

Artificial vortex pinning arrays in superconducting films deposited on highly ordered anodic alumina templates

Luc Piraux、X. Hallet2012-08-08Nanotechnology

A simple procedure is described for creating periodic vortex pinning centers in thin superconducting NbN films. We report on three different strategies which involve the use of highly ordered alumina templates. In this approach, NbN thin films are deposited either on the porous face of the template made of a triangula…

Physics of Superconductivity and MagnetismZnO doping and propertiesAnodic Oxide Films and Nanostructures

Generalized Hypercubes: Edge-Disjoint Hamiltonian Cycles and Gray Codes

Zaid Hussain、Bella Bose、Abdullah Al‐Dhelaan2012-08-08IEEE Transactions on Computers

Some new classes of Hamming metric Gray codes over Zpn, where p is a prime and n is an integer power of 2, are described; then, how these Gray codes can be used to generate the maximum number of edge-disjoint Hamiltonian cycles in an n-dimensional generalized hypercube (GHC), Qpn, is shown. For Qpn, the number of edge…

Coding theory and cryptographySupramolecular Self-Assembly in Materialsgraph theory and CDMA systems

Weak-coupling superconductivity in InSn nanocubes

Ashish Chhaganlal Gandhi、Po-Hsun Shih、Sheng Yun Wu2012-08-08Superconductor Science and Technology

Single crystal InSn nanocubes were synthesized using a simple thermal evaporation method and observed using high-resolution transmission electron microscope images. Enhanced superconducting transitions were observed from the magnetization, revealing a main diamagnetic Meissner state below 6.02(5) K with β-InSn phase.…

Semiconductor Quantum Structures and DevicesNanowire Synthesis and ApplicationsElectronic and Structural Properties of Oxides