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Grain boundary electrochemistry of β‐type Nb–Ti alloy using a scanning droplet cell

Michael T. Woldemedhin、Dierk Raabe、Achim Walter Hassel2011-05-17physica status solidi (a)

Abstract Localized oxide spots were grown at the grain boundaries of a technically relevant 30 at.% Nb–Ti β‐type titanium alloy to study the local electrochemical response. The grain boundaries selected were combinations of grains having different orientations and grain boundary angle. Crystallographic information of…

Corrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsTitanium Alloys Microstructure and Properties

First-principles investigations of electronic and magnetic properties of SrTiO3(001) surfaces with adsorbed ethanol and acetone molecules

Waheed A. Adeagbo、Guntram Fischer、W. Hergert2011-05-17Physical Review B

First-principles methods based on density functional theory are used to investigate the electronic and magnetic properties of molecular interaction of the TiO${}_{2}$ terminated SrTiO${}_{3}$ (100) surface with ethanol or acetone. Both the perfect surface and the surface with an oxygen or a titanium vacancy in the top…

Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsElectronic and Structural Properties of Oxides

Synthesis and Characterization of Cytocompatible Sulfonated Polyanilines

Yanyin Yang、Yonggang Min、Jen‐Chieh Wu 等 6 位作者2011-05-17Macromolecular Rapid Communications

We report here that by good design, polyaniline (PANI) can be cytocompatible and formed into usable scaffolds for bio-medical applications. By adjusting the ratio of two monomers, aniline (AN) and metanilic acid (MA), a series of copolymers with different sulfonation degrees have been synthesized. Four-probe conductiv…

Advanced Sensor and Energy Harvesting MaterialsConducting polymers and applicationsAnalytical Chemistry and Sensors

A Metastable Metal with Decagonal Local Symmetry Obtained by Low‐Temperature Pseudomorphosis

Martin Kaiser、Anna Isaeva、Michael Ruck2011-05-17Angewandte Chemie International Edition

Losing an I: The metastable metallic compound Bi28Ni25 is the product of the mild reduction of the solid precursor Bi28Ni25I5. In a pseudomorphosis the iodine is completely extracted while the macroscopic crystals are preserved. The unique structure is composed of decagonal nanorods, which consist of an outer Bi tube,…

Theoretical and Computational PhysicsMetallic Glasses and Amorphous AlloysQuasicrystal Structures and Properties

Effects of TEMPO oxidation system on kinetic constants of cotton fibers

Lu Dai、Hongqi Dai、Yangchun Yuan 等 5 位作者2011-05-17BioResources

The kinetics of the TEMPO-mediated oxidation of cotton fibers were studied. It was revealed that the oxidation reaction of the cotton fibers by TEMPO/NaBr/NaClO system can be approximately described as two pseudo-first-order reaction kinetics that are based on the cellulose microstructure, namely the kinetic processes…

Advanced Cellulose Research StudiesEnzyme-mediated dye degradationDyeing and Modifying Textile Fibers

Adhesive and Structural Failures of Oxide Coatings on Plasma‐Treated Polymers

Jungheum Yun、Sunghun Lee、Tae‐Sung Bae 等 7 位作者2011-05-17Plasma Processes and Polymers

Abstract This study discloses (i) the chemical and morphological modifications in acrylate hard‐coat and bare polyethylene terephthalate polymers occurring in the course of Ar plasma treatments and (ii) the effects of these modifications on the adhesion, barrier performance, and cohesion of silicon oxide coatings depo…

Surface Modification and SuperhydrophobicityDiamond and Carbon-based Materials ResearchIon-surface interactions and analysis

Dendron-functionalized multiwalled carbon nanotubes incorporating polyoxometalates for water-splitting catalysis

Francesca M. Toma、Andrea Sartorel、Mauro Carraro 等 5 位作者2011-05-17Pure and Applied Chemistry

Carbon nanotubes (CNTs) are versatile nanomaterials with applications spanning from medicinal chemistry and biology, to electronics as field effect transistors or energy as fuel cells. The major drawback stems from the CNT insolubility in most of the organic and aqueous media, which severely hampers the material proce…

Caching and Content DeliveryCovalent Organic Framework ApplicationsNanomaterials for catalytic reactions

Density functional theory study for polycrystalline ZnO doped with Si or Nb

Wolfgang Körner、Christian Elsässer2011-05-17Physical Review B

We present a density functional theory analysis for polycrystalline ZnO doped with the potential multiple donors silicon and niobium. A self-interaction correction allows a more accurate description of the defect formation energies as well as the additional electronic doping levels, which enable us to evaluate the inf…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsElectronic and Structural Properties of Oxides

Supramolecular Intercluster Compounds Consisting of 1D Arrays of Silver Alkynyl Clusters and Wells–Dawson Anions, Displaying Ligand‐Free Interfaces

F. Gruber、Martin Jansen2011-05-17Zeitschrift für anorganische und allgemeine Chemie

Abstract Combining polymeric silver alkynyl clusters with the Wells–Dawson polyoxometalate [P 2 W 18 O 62 ] 6– has led to the formation of the first chain‐like intercluster compounds {[Ag 14 (C≡C t Bu) 8 (C 3 H 7 NO) 10 ][Ag 12 (C≡C t Bu) 6 Cl(C 3 H 7 NO) 10 ]H[P 2 W 18 O 62 ] 2 } n ( 1 ) and {[Ag 16 (C≡C t Bu) 11 (CH…

Metal-Organic Frameworks: Synthesis and ApplicationsPolyoxometalates: Synthesis and ApplicationsNanocluster Synthesis and Applications

Microstructure evolution of zinc oxide films derived from dip-coating sol–gel technique: formation of nanorods through orientation attachment

Nan Huang、Chao Sun、Mingwei Zhu 等 6 位作者2011-05-17Nanotechnology

ZnO:Al thin films with Al incorporation of 0-20 at.% were deposited through the sol-gel technique. Such a film undergoes a significant microstructure development, from columnar to granular structures and then nanorod arrays with increasing Al content. The important role of Al incorporation level in the microstructure…

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

Ultrasensitive Near‐Infrared Raman Reporters for SERS‐Based In Vivo Cancer Detection

Animesh Samanta、Kaustabh Kumar Maiti、K.L. Soh 等 13 位作者2011-05-17Angewandte Chemie

Zuverlässige Berichterstattung: Das Screening einer 80-teiligen Tricarbocyanin-Bibliothek lieferte CyNAMLA-381 als Nahinfrarot-SERS-Reporter mit guter Signalstabilität und höherer Empfindlichkeit als der Standard (SERS=oberflächenverstärkte Raman-Spektroskopie). Durch Verkapselung von CyNAMLA-381 an der Oberfläche von…

Gold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniquesBiosensors and Analytical Detection

Determination of Binding Energy and Solubility Parameters for Functionalized Gold Nanoparticles by Molecular Dynamics Simulation

Brian J. Henz、Peter W. Chung、Jan Andzelm 等 6 位作者2011-05-17Langmuir

The binding energy, density, and solubility of functionalized gold nanoparticles in a vacuum are computed using molecular dynamics simulations. Numerous parameters including surface coverage fraction, functional group (-CH(3), -OH, -NH(2)), and nanoparticle orientation are considered. The analysis includes computation…

Nanoparticles: synthesis and applicationsGold and Silver Nanoparticles Synthesis and ApplicationsPolymer Nanocomposites and Properties

Rationally engineered polymeric cisplatin nanoparticles for improved antitumor efficacy

Abhimanyu S. Paraskar、Shivani Soni、Sudipta Basu 等 8 位作者2011-05-17Nanotechnology

The use of cisplatin, a first line chemotherapy for most cancers, is dose-limited due to nephrotoxicity. While this toxicity can be addressed through nanotechnology, previous attempts at engineering cisplatin nanoparticles have been limited by the impact on the potency of cisplatin. Here we report the rational enginee…

Nanoparticle-Based Drug DeliveryChemotherapy-induced organ toxicity mitigationGraphene and Nanomaterials Applications

Formulation and characterization of leather and rubber wastes composites

Maria‐José U. Ferreira、Manuel Fonseca Almeida、Fernanda Beatriz Aires de Freitas2011-05-17Polymer Engineering and Science

Abstract Residues from footwear roughing and carding operations represent 5–15% (w/w) of the solid wastes generated by shoe‐making companies. These wastes are mainly composed by chromium tanned leather and sole materials, and are mostly land filled. Sometimes leaching tests show these wastes as hazardous due to chromi…

Polymer crystallization and propertiesFiber-reinforced polymer compositesMaterial Selection and Properties

Up-regulation of T lymphocyte and antibody production by inflammatory cytokines released by macrophage exposure to multi-walled carbon nanotubes

Ana Carolina Pimenta Grecco、Rosemeire F.O. de Paula、Erica Mizutani 等 15 位作者2011-05-17Nanotechnology

Our data demonstrate that multi-walled carbon nanotubes (MWCNTs) are internalized by macrophages, subsequently activating them to produce interleukin (IL)-12 (IL-12). This cytokine induced the proliferative response of T lymphocytes to a nonspecific mitogen and to ovalbumin (OVA). This increase in the proliferative re…

Nanoparticles: synthesis and applicationsGraphene and Nanomaterials ApplicationsAnesthesia and Neurotoxicity Research

Mimicking Lotus Leaf: Development of Micro‐Nanostructured Biomimetic Superhydrophobic Polymeric Surfaces by Ultrafine Powder Coating Technology

Mohammad Sayem Mozumder、Hui Zhang、Jesse Zhu2011-05-17Macromolecular Materials and Engineering

Abstract This study demonstrates the development of polymeric superhydrophobic surfaces by a solvent‐free ultrafine powder coating (UPC) technique for the first time. The developed surfaces exhibit lotus effect with water contact angles (CAs) of over 160° and sliding angle (SA) of less than 5°. It is evident that the…

Surface Modification and SuperhydrophobicityFluid Dynamics and Heat TransferAdhesion, Friction, and Surface Interactions

Temperature and pressure dependence of the optical properties of Cr3 +-doped Gd3Ga5O12nanoparticles

Rosa Martín‐Rodríguez、Rafael Valiente、Fernando Rodríguez 等 4 位作者2011-05-17Nanotechnology

Since the crystal-field strength at the Cr(3+) site is very close to the excited-state crossover (ESCO), this work investigates the optical properties of Cr(3+)-doped Gd(3)Ga(5)O(12) (GGG) nanoparticles as a function of temperature and pressure in order to establish the effect of the ESCO on the optical behaviour of n…

Luminescence Properties of Advanced MaterialsGlass properties and applicationsCrystal Structures and Properties

Bisquinoxaline‐Fused Porphyrins for Dye‐Sensitized Solar Cells

Hiroshi Imahori、Hiroaki Iijima、Hironobu Hayashi 等 7 位作者2011-05-17ChemSusChem

5,10,15,20-Tetrakis(2,4,6-trimethylphenyl)-6'-carboxylquinoxalino[2,3-b]quinoxalino[12,13-b']porphyrinatozinc(II) (ZnPBQ) is synthesized to evaluate the effects of π elongation of quinoxaline-fused porphyrins on the optical, electrochemical, and photovoltaic properties. ZnPBQ showed an intensified Soret band as well a…

TiO2 Photocatalysis and Solar CellsElectrochemical sensors and biosensorsPorphyrin and Phthalocyanine Chemistry

Combined Usage of Sodium Borohydride and Aluminum Powder for High‐performance Hydrogen Generation

Hongbin Dai、Guang-Lu Ma、Hai-Jie Xia 等 4 位作者2011-05-17Fuel Cells

Abstract The sodium borohydride (NaBH 4 )‐based hydrolysis system has received considerable interest as a potential hydrogen source for vehicular application. But its practical application was greatly restricted by the low hydrogen density and high material cost. In the present study, we reported that addition of alum…

Hydrogen Storage and MaterialsHybrid Renewable Energy SystemsAmmonia Synthesis and Nitrogen Reduction

The role of specific interaction and selective localization of multiwall carbon nanotubes on the electrical conductivity and phase morphology of multicomponent polymer blends

Suryasarathi Bose、Arup R. Bhattacharyya、Rupesh A. Khare 等 5 位作者2011-05-17Polymer Engineering and Science

Abstract Multicomponent polymer blends involving polyamide6 (PA6), polypropylene (PP), acrylonitrile‐butadiene‐styrene (ABS) and high density polyethylene (HDPE) with multiwall carbon nanotubes (MWNT) were prepared by melt mixing technique to achieve conducting composites. MWNT were either compounded directly or by em…

Carbon Nanotubes in CompositesPolymer crystallization and propertiesConducting polymers and applications