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A Facile Route to Oriented Nickel Hydroxide Nanocolumns and Porous Nickel Oxide

Jixin Zhu、Zhou Gui、Yanyan Ding 等 6 位作者2007-03-24The Journal of Physical Chemistry C

A facile route has been developed to synthesize nickel hydroxide nanocolumns at 60 °C. The characterized results show that the nanocolumns are formed by stacking of oriented Ni(OH) 2 nanosheets. The porous NiO nanocolumns and nanosheets are obtained by the Ni(OH) 2 nanocolumns annealed at 500 °C for 3 h. The NiO nanoc…

ZnO doping and propertiesGas Sensing Nanomaterials and SensorsTransition Metal Oxide Nanomaterials

Enhancing the functional annotation of PDB structures in PDBsum using key figures extracted from the literature

Roman A. Laskowski2007-03-24Bioinformatics

MOTIVATION: The Protein Data Bank (PDB) contains over 43,800 experimentally determined 3D models of macromolecular structures and their complexes. Each 3D model reveals something interesting and important about the given molecule's function and biological significance. Usually the best source of this information is th…

Protein Structure and DynamicsEnzyme Structure and FunctionBiotin and Related Studies

Multicompartment Micelles from Hyperbranched Star-Block Copolymers Containing Polycations and Fluoropolymer Segment

Jiang Mao、Peihong Ni、Yiyong Mai 等 4 位作者2007-03-24Langmuir

In this Article, we have investigated the self-assembly of a series of amphiphilic hyperbranched star-block copolymers to form multicompartment micelles in acidic aqueous solution (pH 3.0) or in a dimethylformamide/water (pH 3.0) mixture. These hyperbranched star-block copolymers were prepared via oxyanion-initiated p…

Advanced Polymer Synthesis and CharacterizationPolymer Surface Interaction StudiesDendrimers and Hyperbranched Polymers

Carbohydrate-Coated Supramolecular Structures: Transformation of Nanofibers into Spherical Micelles Triggered by Guest Encapsulation

Ja‐Hyoung Ryu、Eunji Lee、Yong‐beom Lim 等 4 位作者2007-03-24Journal of the American Chemical Society

Triblock rigid-flexible dendritic block molecules consisting of a rigid aromatic segment as a stem segment, carbohydrate-branched dendrons as a flexible head, and a hydrophobic alkyl chain were synthesized and characterized. The carbohydrate conjugate molecule based on a methyl group as a hydrophobic tail, in the soli…

Bacteriophages and microbial interactionsSupramolecular Self-Assembly in MaterialsPolydiacetylene-based materials and applications

Critical exponents of small one-dimensional ising magnetic

D. V. Spirin、V. N. Udodov2007-03-24arXiv

Within the framework of a generalized Ising model, a one-dimensional magnetic of a finite length with free ends is considered. The correlation length exponent, dynamic critical exponent z of the magnet is calculated taking into account the next nearest neighbor interactions and the external field.

Materials Science

meso-Aryl-Substituted Subporphyrins: Synthesis, Structures, and Large Substituent Effects on Their Electronic Properties

Yasuhide Inokuma、Zin Seok Yoon、Dongho Kim 等 4 位作者2007-03-24Journal of the American Chemical Society

Two synthetic methods of meso-aryl-substituted subporphyrins have been developed by means of the reaction of pyridine-tri-N-pyrrolylborane with a series of aryl aldehydes. One method relies on the condensation under Adler conditions with chloroacetic acid in refluxing 1,2-dichlorobenzene to afford subporphyrins in 1.1…

Porphyrin and Phthalocyanine ChemistrySynthesis and Properties of Aromatic CompoundsPorphyrin Metabolism and Disorders

Ion Gel Gated Polymer Thin-Film Transistors

Jiyoul Lee、Matthew J. Panzer、Yiyong He 等 5 位作者2007-03-24OpenAlex

We have fabricated polymer semiconductor thin-film transistors using an ion gel (ionic liquid plus triblock copolymer) as the gate dielectric layer. The gate capacitance of the ion gel can be as large as 40 μF/cm 2 at 10 Hz and 2 μF/cm 2 at 1 kHz. In addition, the polarization response time of the ion gel is much fast…

Organic Electronics and PhotovoltaicsAdvanced Memory and Neural ComputingConducting polymers and applications

Titelbild: Formation of Gels and Liquid Crystals Induced by Pt⋅⋅⋅Pt and π–π* Interactions in Luminescent σ‐Alkynyl Platinum(II) Terpyridine Complexes (Angew. Chem. 15/2007)

Franck Camerel、Raymond Ziessel、Bertrand Donnio 等 8 位作者2007-03-23Angewandte Chemie

Weiche Platindrähte lassen sich durch Verknüpfung amphiphiler Alkinplattformen mit planaren Pt II ‐Terpyridin‐Einheiten herstellen. Das Titelbild zeigt Fasern, die durch Stapeln solcher Komplexe über Pt⋅⋅⋅Pt‐ und π–π‐Wechselwirkungen gebildet werden. Man erhält dunkelgrüne Gele und flüssigkristalline Materialien mit P…

Mesoporous Materials and CatalysisPorphyrin and Phthalocyanine ChemistrySurface Chemistry and Catalysis

Local defect in a magnet with long-range interactions

José A. Hoyos、Thomas Vojta2007-03-23Physical Review B

We investigate a single defect coupling to the square of the order parameter in a nearly critical magnet with long-range spatial interactions of the form ${r}^{\ensuremath{-}(d+\ensuremath{\sigma})}$, focusing on magnetic droplets nucleated at the defect while the bulk system is in the paramagnetic phase. To determine…

Magnetic properties of thin filmsTheoretical and Computational PhysicsMagnetic Properties of Alloys

Filling dependence of a new type of charge ordered liquid on a triangular lattice system

Chisa Hotta、Nobuo Furukawa2007-03-23Journal of Physics Condensed Matter

We study the new characteristic gapless charge ordered state in a spinless fermion system on a triangular lattice under strong inter-site Coulomb interactions. In this state the charges are spontaneously divided into solid and liquid components, and the former solid part aligns in a Wigner crystal manner while the lat…

Physics of Superconductivity and MagnetismCold Atom Physics and Bose-Einstein CondensatesOrganic and Molecular Conductors Research

Numerical modelling of the industrial silicon single crystal growth processes

Bernard Nacke、A. Muižnieks2007-03-23GAMM-Mitteilungen

Abstract Silicon wafers produced from the silicon single crystals are the basic material for the manufacturing of various kinds of electronic devices determining the everyday life of the modern society. Silicon single crystals industrially are mainly grown by two methods ‐ by the Czochralski and by the floating zone t…

Solidification and crystal growth phenomena

Formation of High‐Quality CdS and Other II–VI Semiconductor Nanocrystals in Noncoordinating Solvents: Tunable Reactivity of Monomers

William W. Yu、Xiaogang Peng2007-03-23Angewandte Chemie International Edition

The authors of this Communication recently noted that a key word in a sentence in their publication appeared incorrectly. Thus, the penultimate sentence in the penultimate paragraph on page 2369 should read: Hence, it is safe to conclude that the number of nanocrystals (nuclei) formed in the initial nucleation stage i…

Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films

Formation of High‐Quality CdS and Other II–VI Semiconductor Nanocrystals in Noncoordinating Solvents: Tunable Reactivity of Monomers

W. William Yu、Xiaogang Peng2007-03-23Angewandte Chemie

Die Autoren bemerkten kürzlich einen sinnverändernden Fehler in dieser Zuschrift. Der vorletzte Satz des vorletzten Abschnitts auf S. 2475 muss lauten: “Hence, it is safe to conclude that the number of nanocrystals (nuclei) formed in the initial nucleation stage increased significantly with decreasing initial oleic ac…

Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films

Bonding-site dependence of surface resistivity: CO on epitaxial Cu(100) films

Chang Liu、R. G. Tobin2007-03-23The Journal of Chemical Physics

The authors have measured the contribution of CO adsorbed on different bonding sites to the resistivity of epitaxial Cu(100) films. Through an analysis of the correlation between surface resistivity and temperature-programed desorption measurements, CO on terraces is found to affect the resistance much more strongly t…

Metal and Thin Film MechanicsSemiconductor materials and devicesCopper Interconnects and Reliability

Nanometer‐Sized Molybdenum–Iron Oxide Capsule‐Surface Modifications: External and Internal

Achim Müller、Hartmut Bögge、Filipa L. Sousa 等 10 位作者2007-03-23Small

The cluster {(Mo)Mo5}12Fe(III)30 1 a present in compound 1 (cluster diameter approximately 2.3 nm), which belongs to the family of nanoscale spherical porous {(Mo)Mo5}12{Linker}30 capsules that allow a new type of nanochemistry inside their cavities as well as unprecedented aggregation processes under gaseous, solutio…

Polyoxometalates: Synthesis and ApplicationsMetalloenzymes and iron-sulfur proteinsNanocluster Synthesis and Applications

Influence of mineralogy of Tunisian clays on pozzolanic activity—assessment by different methods

B. Samet、Ahlem Chakchouk、Thameur Mnif 等 4 位作者2007-03-23Advances in Cement Research

Five local clays were characterised by several physicochemical methods to predict their pozzolanic reactivity. The studied samples were treated thermally at 600, 700 and 800°C. The heat-treated samples were characterised by X-ray diffraction. The pozzolanic activity was assessed by chemical (Chappelle test), mechanica…

Concrete and Cement Materials ResearchSoil and Unsaturated FlowClay minerals and soil interactions

Anomalous electronic, phonon, and spin excitations in the chalcogenide spinel FeCr2S4

K-Y Choi、P. Lemmens、Patric Scheib 等 8 位作者2007-03-23Journal of Physics Condensed Matter

We report inelastic light scattering experiments on FeCr 2 S 4 , which shows colossal magnetoresistance (CMR) effects around T C ≈170 K. Several distinct features have been observed: (i) anomalies in phonon frequencies and linewidths around T C , (ii) the vanishing of one-magnon excitation close to 0.83 T C , and (iii…

Physics of Superconductivity and MagnetismMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics

Antiferromagnetic or Canted Antiferromagnetic Orderings of Fe(III) d Spins of FeX4- Ions in BEDT-TTFVO(S)·FeX4 (X = Cl, Br) [BEDT-TTFVO(S) = Bis(ethylenedithio)tetrathiafulvalenoquinone(-thioquinone)-1,3-dithiolemethide]

Mingxing Wang、Xunwen Xiao、Hideki Fujiwara 等 8 位作者2007-03-23Inorganic Chemistry

By the reaction of new donor molecules, bis(ethylenedithio)tetrathiafulvalenoquinone(-thioquinone)-1,3-dithiolemethides [BEDT-TTFVO (1) and BEDT-TTFVS (2)] with FeX3 (X = Cl, Br) in CS2/CH3CN, 1:1 salts of 1 or 2 with an FeX4- ion (1.FeX4 and 2.FeX4) were obtained as black needle crystals. Their crystal structures are…

Perovskite Materials and ApplicationsMagnetism in coordination complexesOrganic and Molecular Conductors Research

From Molecule to Bulk Material: Optical Properties of Hydrogen‐Bonded Dimers [C12H12N4O2AgPF6]2 and [C28H28N6O3AgPF6]2 Depend on the Arrangement of the Oxime Moieties

Wen‐Dan Cheng、Dongsheng Wu、Juan Shen 等 7 位作者2007-03-23Chemistry - A European Journal

The dependence of the optical properties of [C(12)H(12)N(4)O(2)AgPF(6)](2) (dimer-1) and [C(28)H(28)N(6)O(3)AgPF(6)](2) (dimer-2) on the arrangement of the oxime moieties in the molecule and in bulk crystals was investigated by means of time-dependent density functional theory. Dimer-1 with simple pyridine oxime ligan…

Porphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer StudiesLuminescence and Fluorescent Materials

Testing Oligothiophene Fluorophores under Physiological Conditions. Preparation and Optical Characterization of the Conjugates of Bovine Serum Albumin with Oligothiophene N-Hydroxysuccinimidyl Esters

Massimo Zambianchi、Andrea Barbieri、Alfredo Ventola 等 7 位作者2007-03-23Bioconjugate Chemistry

Bovine serum albumin (BSA) was reacted with linear and newly synthesized branched oligothiophene N-hydroxysuccinimidyl ester fluorophores (TSEs) in moderately basic carbonate buffer solution. Optically stable BSA-TSE conjugates were obtained with a degree of labeling depending on experimental conditions. Conjugates wi…

Lanthanide and Transition Metal ComplexesProtein Interaction Studies and Fluorescence AnalysisElectron Spin Resonance Studies