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A comparative study of the magnetocaloric effect in RNi2 (R=Nd,Gd,Tb) intermetallic compounds

E.J.R. Plaza、V.S.R. de Sousa、P.J. von Ranke 等 7 位作者2009-01-01Journal of Applied Physics

Conventional and anisotropic magnetocaloric effects were studied in cubic rare earth RNi2 (R=Nd,Gd,Tb) ferromagnetic intermetallic compounds. These three compounds are representative of small, null, and large magnetocrystalline anisotropy in the series, respectively. Magnetic measurements were performed in polycrystal…

Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsShape Memory Alloy Transformations

[Pt(mesBIAN)(tda)]: A near-infrared emitter and singlet oxygen sensitizer

Aaron A. Rachford、Fei Hua、Christopher J. Adams 等 4 位作者2009-01-01Dalton Transactions

The synthesis and subsequent photophysical investigation of [Pt(mesBIAN)(tda)], where mesBIAN is bis(mesitylimino)acenaphthene and tda is tolan-2,2'-diacetylide, reveal excited-state characteristics best described as triplet charge transfer ((3)CT) in nature upon visible light excitation. Large ground-state dipole mom…

Luminescence and Fluorescent MaterialsLanthanide and Transition Metal ComplexesAnalytical Chemistry and Sensors

Layered hybrid organic–inorganic nanobelts exhibiting a field-induced magnetic transition

Minhua Cao、Igor Djerdj、Zvonko Jagličić 等 5 位作者2009-01-01Physical Chemistry Chemical Physics

Here we present the synthesis of layered, ferrimagnetic, Co-based organic-inorganic hybrid nanobelts formed through self-organization in a non-aqueous process. The belts are formed solvothermally by reacting cobalt(iii) acetylacetonate with benzoic acid in benzyl alcohol at 150 degrees C. Benzoic acid not only acts as…

Supercapacitor Materials and FabricationMesoporous Materials and CatalysisLayered Double Hydroxides Synthesis and Applications

Inverse regime of ionic modification of surface anchoring in nematic droplets

V. Ya. Zyryanov、Mikhail N. Krakhalev、O. O. Prishchepa 等 4 位作者2009-01-01Journal of Experimental and Theoretical Physics Letters

It was found that the effect of the ionic modification of anchoring in liquid-crystal droplets can be implemented in the inverse regime. Droplets of 4- n -pentyl-4′-cyanobiphenyl nematic doped with ionic cetyltrimethylammonium bromide surfactant were dispersed in polyvinyl alcohol and investigated. In the initial stat…

Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsSurfactants and Colloidal Systems

Fabrication of stable anisotropic microcapsules

Huda A. Jerri、Rachel A. Dutter、Darrell Velegol2009-01-01Soft Matter

The layer-by-layer polyelectrolyte adsorption technique has been combined with the particle lithography technique to produce anisotropic polymer microcapsules each with a single nanoscale patch. The patch region covers roughly 5% of the capsule surface area, while the remaining 95% of the capsule surface is reinforced…

Surfactants and Colloidal SystemsPolymer Surface Interaction StudiesPickering emulsions and particle stabilization

Coordination complexes with the redox active tetrathiafulvalene based imino-pyrazine ligand: syntheses, a radical cation salt, crystal structures and electrochemistry

Goulven Cosquer、Fabrice Pointillart、Yann Le Gal 等 6 位作者2009-01-01Dalton Transactions

The tetrathiafulvalene based 2-immino-pyrazine derivative (TTF-CHN-2-pyz) () was synthesized and characterized. Its radical cation salt ( (+)PF(6)(-)) was prepared as single crystals by electrocrystallisation. (+)PF(6)(-) crystallizes in the triclinic P1 space group. Four 1 : 2 bis(hexafluoroacetylacetonate)M(ii) comp…

Magnetism in coordination complexesOrganic and Molecular Conductors ResearchN-Heterocyclic Carbenes in Organic and Inorganic Chemistry

Activation of <i>Bacillus subtilis</i> Ugd by the BY-Kinase PtkA Proceeds via Phosphorylation of Its Residue Tyrosine 70

Dina Petranović、Christophe Grangeasse、Boris Maček 等 8 位作者2009-01-01Microbial Physiology

The phosphorylation-dependent activation of bacterial UDP-glucose dehydrogenases by BY-kinases has been previously described in several bacterial model organisms, but the identity of phosphorylated tyrosine(s) and the exact activation mechanism remained unknown. A recent site-specific phosphoproteomic study indicated…

Protein Structure and DynamicsBacterial Genetics and BiotechnologyEnzyme Structure and Function

Effect of a BaTiO3 nanoparticle additive on the quality of thin-film Ni electrodes in MLCC

Ken-ichi Sugimura、Kazuhisa Hirao2009-01-01Journal of the Ceramic Society of Japan

To increase the film quality of the nickel electrode in a multi-layer ceramic capacitor (MLCC), the BaTiO3 particles are usually used as an additive material in the electrode paste. In this report, we investigated the effects of particle size (30-100 nm) and the amount (10-20% mass ratio to Ni) of BaTiO3 nanoparticle…

Ferroelectric and Piezoelectric MaterialsDielectric materials and actuatorsAnodic Oxide Films and Nanostructures

Nano-patterned structures in cylindrical polyelectrolyte brushes assembled with oppositely charged polyions

Sergey V. Larin、Dmitry V. Pergushov、Youyong Xu 等 7 位作者2009-01-01Soft Matter

We demonstrate that the electrostatically driven association of cylindrical polyelectrolyte brushes (CPBs) with oppositely charged linear polyelectrolytes (PEs) in dilute aqueous solution gives rise to well-defined and colloidaly stable (not undergoing secondary aggregation with time) polymeric nano-assemblies represe…

Surfactants and Colloidal SystemsPolymer Surface Interaction StudiesElectrostatics and Colloid Interactions

Influence of different surface machining treatments of resorbable magnesium alloy implants on degradation – EDX‐analysis and histology results

N. von der Höh、Brigitte von Rechenberg、Dirk Bormann 等 5 位作者2009-01-01Materialwissenschaft und Werkstofftechnik

Abstract The surface of cylindrical MgCa0.8 implants were differently machined which leads to smooth implants, sandblasted and threaded cylinders. 16 implants of each group were implanted into the medial femoral condylus of New Zealand White rabbits (totally n = 48). Each half of the implants remained for three and si…

Orthopaedic implants and arthroplastyMagnesium Alloys: Properties and ApplicationsAluminum Alloys Composites Properties

Evaluation of genotoxicity of amine-terminated water-dispersible FePt nanoparticles in the Ames test and in vitro chromosomal aberration test

Shinya Maenosono、Rie Yoshida、Soichiro Saita2009-01-01The Journal of Toxicological Sciences

Genotoxicity of superparamagnetic iron-platinum (FePt) nanoparticles (NPs) capped with 2-aminoethanethiol (AET) was evaluated using the bacterial reverse mutation assay (Ames test) and in vitro chromosomal aberration test. Mutagenicity of AET-capped FePt NPs was found to be negative in the Ames test, while clastogenic…

Nanoparticles: synthesis and applicationsGold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniques

A novel approach for fabrication of bismuth-silicon dioxide core-shell structures by atomic layer deposition

Jong‐Min Lee、Jongmin Lee、Shadyar Farhangfar 等 10 位作者2009-01-01Journal of Materials Chemistry

Bismuth (Bi) nanowires were grown electrochemically into the pores of anodic aluminium oxide (AAO) templates. The diameter of the pores in the AAO membranes has been precisely tuned down to 30 nm by atomic layer deposition (ALD) of silicon dioxide onto the pore walls. Bi nanowires with diameters of 30, 50, and 200 nm…

Semiconductor materials and devicesNanowire Synthesis and ApplicationsAnodic Oxide Films and Nanostructures

Fabrication of Ga2O3 thin films by aqueous solution deposition

Yutaka Ohya、Jyunya OKANO、Yuki KASUYA 等 4 位作者2009-01-01Journal of the Ceramic Society of Japan

Ga2O3 thin films were fabricated using the Ga nitrate and GaOOH aqueous solutions. The films were crystallized as β-Ga2O3 phase by heating at 700°C and the band gap of resultant films was about 4.9 eV. The films were uniform and the film from Ga nitrate solution was dense with porosity of about 3%. The resistivity of…

Advanced Photocatalysis TechniquesZnO doping and propertiesGa2O3 and related materials

The synthesis of a 3d–4f polynuclear metal cluster under microwave irradiation: crystal structure and magnetic property of [La3Ni6(IDA)6(OH)6(H2O)12]·3NO3·15H2O (IDA = iminodiacetate)

Gui‐Lin Zhuang、Xiaojun Sun、La‐Sheng Long 等 5 位作者2009-01-01Dalton Transactions

A cage-shaped 3d-4f heterometallic ferromagnetic cluster, consisting of six Ni(ii) and three La(iii) ions, was synthesized by microwave irradiation. The magnetic susceptibilities of the cluster were fitted with the help of the program MAGPACK, revealing that the magnetic exchange in the cluster is closely related to t…

Metal-Organic Frameworks: Synthesis and ApplicationsMagnetism in coordination complexesLanthanide and Transition Metal Complexes

Melting Phenomenon during Ultra-High-Speed GTA Welding Method using Pulse-heated Hot-wire

Kenji Shinozaki、M. Yamamoto、Yasuo Nagamitsu 等 8 位作者2009-01-01QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

The purpose of this study is to develop the ultra-high-speed GTA welding process with hot-wire system using pulsed current to heat filler wire. For precise control of the ultra-high-speed (over 5 m/min) GTA welding, it is necessary to understand deeply the ultra-high-speed welding phenomenon. The melting phenomenon of…

Metal and Thin Film MechanicsMicrostructure and Mechanical Properties of SteelsMetal Alloys Wear and Properties

The Use of the &ldquo;+<i>U</i>&rdquo; Correction in Describing Defect States at Metal Oxide Surfaces: Oxygen Vacancies on CeO<sub>2</sub> and TiO<sub>2</sub>, and Li-doping of MgO

Benjamin J. Morgan、David O. Scanlon、Graeme W. Watson2009-01-01e-Journal of Surface Science and Nanotechnology

There are many examples of defects in strongly-correlated metal oxides for which density functional theory predicts electronic structures that qualitatively disagree with experimental data. This behaviour arises from the self-interaction error inherent to standard density functionals, and is demonstrated by both p- an…

Catalytic Processes in Materials ScienceCatalysis and Oxidation ReactionsElectronic and Structural Properties of Oxides

Effect of Cu Addition on the Phase Equilibria in Nd-Fe-B Sintered Magnets

Shota Nishio、Satoshi Sugimoto、Ryota Goto 等 5 位作者2009-01-01MATERIALS TRANSACTIONS

Nd-Fe-B sintered magnets show high energy products and have started to be used for motors of hybrid electric vehicles (HEVs). For the use of the magnets, the understanding of the coercivity mechanism is required for obtaining high coercivity. The Nd-rich phase in Nd-Fe-B sintered magnets plays an important role in cle…

Magnetic properties of thin filmsHydrogen Storage and MaterialsMagnetic Properties of Alloys

Characteristics of surface-enhanced Raman scattering and surface-enhanced fluorescence using a single and a double layer gold nanostructure

Mohammad Kamal Hossain、Genin Gary Huang、Tadaaki Kaneko 等 4 位作者2009-01-01Physical Chemistry Chemical Physics

This paper reports the characteristics of surface-enhanced Raman scattering (SERS) and surface-enhanced fluorescence (SEF) using a unique SERS-active substrate comprised of a single layer and a double layer of two-dimensional (2D) gold nanostructure. Colloidal gold nanoparticles were immobilized on a glass substrate a…

Gold and Silver Nanoparticles Synthesis and ApplicationsAdvanced biosensing and bioanalysis techniquesNanocluster Synthesis and Applications

Dissipative particle dynamics simulation of quaternary bolaamphiphiles: multi-colour tiling in hexagonal columnar phases

Martin A. Bates、Martin Walker2009-01-01Physical Chemistry Chemical Physics

We use dissipative particle dynamics simulations to examine the phase behaviour of X-shaped quaternary bolaamphiphiles. These molecules are composed of a rod-shaped core, with polar groups at each end and two different lateral chains. We show that, as for ternary bolaamphiphiles, square and hexagonal columnar phases a…

Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsBlock Copolymer Self-Assembly

Dynamic simulation of void nucleation during electromigration in narrow integrated circuit interconnects

Wei Li、Cher Ming Tan、Nagarajan Raghavan2009-01-01Journal of Applied Physics

Electromigration (EM) is an important failure mechanism in integrated circuit interconnections. Various models have been proposed to study the interconnect degradation due to EM from different perspectives. As the interconnect linewidth shrinks to submicrometer and below, a small growth in void size after void nucleat…

Metal and Thin Film MechanicsElectronic Packaging and Soldering TechnologiesCopper Interconnects and Reliability