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Thermal investigation of a micro-gap thermionic power generator

Remi Yacine Belbachir、Zhonglie An、Takahito Ono2014-07-15Journal of Micromechanics and Microengineering

The demand for safe and clean energy sources has become more important than ever worldwide. Thermionic power generation is one of these energy sources, which directly converts heat into electrical energy using thermionic electrons. We developed a micro-gap thermionic power generator, which operates at relatively low t…

Advanced Thermoelectric Materials and DevicesAdvanced Thermodynamics and Statistical MechanicsThermal Radiation and Cooling Technologies

Unraveling the Pivotal Impacts of Electron-Acceptors on Light Absorption and Carrier Photogeneration in Perylene Dye Sensitized Solar Cells

Min Zhang、Zhaoyang Yao、Cancan Yan 等 7 位作者2014-07-15ACS Photonics

Understanding the ultrafast dynamics of excited state evolution and carrier generation at the complicated titania/dye/electrolyte interface is crucial for the development of narrow energy-gap organic dyes to enhance the performance of dye-sensitized solar cells (DSCs). We herein modulate the energy-levels of N -annula…

TiO2 Photocatalysis and Solar CellsAdvanced Photocatalysis TechniquesQuantum Dots Synthesis And Properties

Electrical conductivity properties of expanded graphite–polycarbonatediol polyurethane composites

B. Redondo-Foj、P. Ortiz‐Serna、Marta Carsí 等 7 位作者2014-07-15Polymer International

Abstract Conductive polymer composites of segmented polycarbonatediol polyurethane and expanded graphite (EG) have been synthesized with different amounts of EG conductive filler (from 0 to 50 wt%). SEM, X‐ray diffraction measurements, Fourier transform infrared and Raman spectroscopies demonstrated a homogeneous disp…

Polymer crystallization and propertiesConducting polymers and applicationsFiber-reinforced polymer composites

Highly Efficient Chiral Resolution of dl ‐Arginine by Cocrystal Formation Followed by Recrystallization under Preferential‐Enrichment Conditions

Sekai Iwama、Kazunori Kuyama、Yuko Mori 等 13 位作者2014-07-15Chemistry - A European Journal

An excellent chiral symmetry-breaking spontaneous enantiomeric resolution phenomenon, denoted preferential enrichment, was observed on recrystallization of the 1:1 cocrystal of dl-arginine and fumaric acid, which is classified as a racemic compound crystal with a high eutectic ee value (>95 %), under non-equilibrium c…

Crystallography and molecular interactionsCrystallization and Solubility StudiesMolecular spectroscopy and chirality

Modeling and Measurement of Contact Angle Hysteresis on Textured High-Contact-Angle Surfaces

Brendan Koch、Alidad Amirfazli、Janet A.W. Elliott2014-07-15The Journal of Physical Chemistry C

Abstract A set of surfaces with different Cassie fractions were fabricated. For a given Cassie fraction surfaces had different pillar diameter and spacing combinations. Advancing and receding contact angles of both water and ethylene glycol were measured on the fabricated surfaces. We examined the effects of both surf…

Surface Modification and SuperhydrophobicityAdvanced Sensor and Energy Harvesting MaterialsAdhesion, Friction, and Surface Interactions

Nano‐ and Microscale Engineering of the Molybdenum Disulfide‐Based Catalysts for Syngas to Ethanol Conversion

Muxina Konarova、Fengqiu Tang、Jiuling Chen 等 6 位作者2014-07-15ChemCatChem

Abstract Nickel‐promoted MoS2, unsupported catalysts and laponite‐supported alcohol synthesis catalysts were synthesised by using microemulsion (ME) and hydrothermal (HT) methods. Highly ordered sulfide slabs, consisting of up to seven layers, were visible in the TEM images of HT‐based NiMoS2 catalysts. In contrast, d…

Electrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceCatalysis and Hydrodesulfurization Studies

Quantified p H imaging with hyperpolarized 13 C ‐bicarbonate

David Scholz、Martin Janich、Ulrich Köllisch 等 9 位作者2014-07-15Magnetic Resonance in Medicine

PURPOSE: Because pH plays a crucial role in several diseases, it is desirable to measure pH in vivo noninvasively and in a spatially localized manner. Spatial maps of pH were quantified in vitro, with a focus on method-based errors, and applied in vivo. METHODS: In vitro and in vivo (13) C mapping were performed for v…

Nonlinear Optical Materials ResearchAdvanced NMR Techniques and ApplicationsAtomic and Subatomic Physics Research

Interdiffusion Induced Exchange Coupling of L10-FePd/α-Fe Magnetic Nanocomposites

Alec Kirkeminde、Shenqiang Ren2014-07-15Nano Letters

One-pot synthesis of FePd and FePd/Fe2O3 (core/shell) nanoparticles via interdiffusion is reported for the first time. It was found that the size of FePd particles and Fe2O3 shell thickness could be controlled by the ligand and iron precursor amounts, respectively. These FePd/Fe2O3 particles can be reductively anneale…

Magnetic properties of thin filmsMetallic Glasses and Amorphous AlloysMagnetic Properties of Alloys

Nanoring structure, spacing, and local dielectric sensitivity for plasmonic resonances in Fano resonant square lattices

Gregory T. Forcherio、Phillip Blake、Drew DeJarnette 等 4 位作者2014-07-15Optics Express

Lattices of plasmonic nanorings with particular geometries exhibit singular, tunable resonance features in the infrared. This work examined effects of nanoring inner radius, wall thickness, and lattice constant on the spectral response of single nanorings and in Fano resonant square lattices, combining use of the disc…

Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchOptical Coatings and Gratings

Single Molecule Rectification Induced by the Asymmetry of a Single Frontier Orbital

Wendu Ding、Christian F. A. Negre、Leslie Vogt-Maranto 等 4 位作者2014-07-15Journal of Chemical Theory and Computation

A mechanism for electronic rectification under low bias potentials is elucidated for the prototype molecule HS-phenyl-amide-phenyl-SH. We apply density functional theory (DFT) combined with the nonequilibrium Green's function formalism (NEGF), as implemented in the TranSIESTA computational code to calculate transport…

Advanced biosensing and bioanalysis techniquesQuantum Dots Synthesis And PropertiesMolecular Junctions and Nanostructures

Specific-Heat Evidence of the First-Order Superconducting Transition in Sr2RuO4

Shingo Yonezawa、Tomohiro Kajikawa、Yoshiteru Maeno2014-07-15Journal of the Physical Society of Japan

We investigate the specific heat of ultra-pure single crystals of Sr2RuO4, a leading candidate of a spin-triplet superconductor. We for the first time obtained specific-heat evidence of the first-order superconducting transition below 0.8 K, namely divergent-like peaks and clear hysteresis in the specific heat at the…

Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsOrganic and Molecular Conductors Research

Fabrication of Segmented Au/Co/Au Nanowires: Insights in the Quality of Co/Au Junctions

Bumjin Jang、Eva Pellicer、Miguel Guerrero 等 8 位作者2014-07-15ACS Applied Materials & Interfaces

Electrodeposition is a versatile method, which enables the fabrication of a variety of wire-like nanoarchitectures such as nanowires, nanorods, and nanotubes. By means of template-assisted electrodeposition, segmented Au/Co/Au nanowires are grown in anodic aluminum oxide templates from two different electrolytes. To t…

Electrodeposition and Electroless CoatingsNanowire Synthesis and ApplicationsAnodic Oxide Films and Nanostructures

Adipose Tissue-Derived Mesenchymal Stem Cells in Long-Term Dialysis Patients Display Downregulation of PCAF Expression and Poor Angiogenesis Activation

Shuichiro Yamanaka、Shinya Yokote、Akifumi Yamada 等 10 位作者2014-07-15PLoS ONE

We previously demonstrated that mesenchymal stem cells (MSCs) differentiate into functional kidney cells capable of urine and erythropoietin production, indicating that they may be used for kidney regeneration. However, the viability of MSCs from dialysis patients may be affected under uremic conditions. In this study…

Mesenchymal stem cell researchElectrospun Nanofibers in Biomedical ApplicationsTissue Engineering and Regenerative Medicine

Prediction of Intramolecular Polarization of Aromatic Amino Acids Using Kriging Machine Learning

Timothy L. Fletcher、Stuart J. Davie、Paul L. A. Popelier2014-07-15Journal of Chemical Theory and Computation

Present computing power enables novel ways of modeling polarization. Here we show that the machine learning method kriging accurately captures the way the electron density of a topological atom responds to a change in the positions of the surrounding atoms. The success of this method is demonstrated on the four aromat…

Protein Structure and DynamicsComputational Drug Discovery MethodsMachine Learning in Materials Science

Gels and Lyotropic Liquid Crystals: Using an Imidazolium-Based Catanionic Surfactant in Binary Solvents

Ni Cheng、Qiongzheng Hu、Yanhui Bi 等 6 位作者2014-07-15Langmuir

The self-assembly behavior of an imidazolium-based catanionic surfactant, 1-butyl-3-methylimidazolium dodecylsulfate ([C4mim][C12H25SO4]), was investigated in water-ethylammonium nitrate (EAN) mixed solvents with different volume ratios. It is particular interesting that this simple surfactant could not only form lyot…

Lipid Membrane Structure and BehaviorSurfactants and Colloidal SystemsSupramolecular Self-Assembly in Materials

Gauging metal Lewis basicity of zerovalent iron complexes via metal-only Lewis pairs

Holger Braunschweig、Rian D. Dewhurst、Florian Hupp 等 7 位作者2014-07-15Chemical Science

A range of pentacoordinate iron complexes of the form [Fe(CO)5−nLn] (L = neutral donor, n = 0–2) were treated with gallium chloride or bromide, leading to hexacoordinate metal-only Lewis pairs (MOLPs) of the form [Ln(OC)5−nFe → GaX3] (X = Cl, Br). These complexes were used to gauge the Lewis basicity of the pentacoord…

Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesInorganic Chemistry and Materials

Implications of silica on biorefineries – interactions with organic material and mineral elements in grasses

Duy Michael Le、Hanne R. Sørensen、Niels Ole Knudsen 等 4 位作者2014-07-15Biofuels Bioproducts and Biorefining

Abstract Biorefineries aim to convert low value biomasses into high value products. The feedstock biomasses are often high‐silica agricultural waste products such as rice straw, wheat straw, corn stover, sugarcane bagasse, or empty fruit bunches. This causes challenges, since silica is problematic in industrial proces…

Biofuel production and bioconversionClay minerals and soil interactionsSilicon Effects in Agriculture

Orientation‐Controlled Single‐Molecule Junctions

Sepideh Afsari、Zhihai Li、Eric Borguet2014-07-15Angewandte Chemie International Edition

The conductivity of a single aromatic ring, perpendicular to its plane, is determined using a new strategy under ambient conditions and at room temperature by a combination of molecular assembly, scanning tunneling microscopy (STM) imaging, and STM break junction (STM-BJ) techniques. The construction of such molecular…

Graphene research and applicationsQuantum and electron transport phenomenaMolecular Junctions and Nanostructures

Phylogeny of N orth A merican T olypella( C harophyceae, C harophyta) based on plastid DNA sequences with a description of T olypella ramosissimasp. nov.

William Pérez、John D. Hall、Richard M. McCourt 等 4 位作者2014-07-15Journal of Phycology

Characeae (Charophyceae, Charophyta) contains two tribes with six genera: tribe Chareae with four genera and tribe Nitelleae, which includes Tolypella and Nitella. This paper uses molecular and morphological data to elucidate the phylogeny of Tolypella species in North America. In the most comprehensive taxonomic trea…

Marine and coastal plant biologyProtist diversity and phylogenyDiatoms and Algae Research

Facile in Situ Synthesis of BiOCl Nanoplates Stacked to Highly Porous TiO2: A Synergistic Combination for Environmental Remediation

Miguel Guerrero、A. Altube、Eva García‐Lecina 等 7 位作者2014-07-15ACS Applied Materials & Interfaces

A novel nanocomposite material made of two-dimensional BiOCl nanoplates assembled into highly porous titania has been successfully prepared following a facile sol-gel reaction. Both the TiO2 (anatase) and BiOCl components are crystalline as demonstrated by X-ray diffraction and transmission electron microscopy analyse…

TiO2 Photocatalysis and Solar CellsAdvanced Photocatalysis TechniquesAdvanced Nanomaterials in Catalysis