Charles R. Cornman、Katherine M. Geiser-Bush、Stephen P. Rowley 等 4 位作者1997-12-01Inorganic Chemistry
[ N, N ‘-Ethylenebis( o -( tert -butyl- p -methylsalicylaldiminato)]oxovanadium(IV) ( 1 ), [ N, N ‘-propanediylbis( o -( tert -butyl- p -methylsalicylaldiminato)]oxovanadium(IV) ( 2 ), bis( N -methylsalicylaldiminato)oxovanadium(IV) ( 3 ), bis( N -isopropyl- o -methylsalicylaldiminato)oxovanadium(IV) ( 4 ), and, bis(…
Metal complexes synthesis and propertiesMagnetism in coordination complexesVanadium and Halogenation Chemistry
U. Stuhr、P. Vorderwisch、V. V. Kokorin 等 4 位作者1997-12-01Physical review. B, Condensed matter
Low-energy phonons were studied in the ferromagnetic and paramagnetic phases of the Heusler alloy ${\mathrm{Ni}}_{2}\mathrm{MnGa}.$ The investigated sample shows a martensitic phase transformation with a transition temperature ${T}_{M}\ensuremath{\approx}284\mathrm{K},$ only about 80 K below the Curie temperature. The…
Shape Memory Alloy TransformationsMagnetic Properties and ApplicationsHeusler alloys: electronic and magnetic properties
Dominique Bazin、Dale A. Sayers、J. J. Rehr1997-12-01The Journal of Physical Chemistry B
The emergence of the synchrotron radiation center in the past decade has resulted in a tremendous development of various techniques. XAS is an efficient tool for describing local organization in materials such as nanometer-scale metallic clusters but is insensitive to polydispersity. Ab initio calculations of the diff…
Advanced Chemical Physics StudiesElectron and X-Ray Spectroscopy TechniquesX-ray Diffraction in Crystallography
Robert M. Darling、John Newman1997-12-01Journal of The Electrochemical Society
A mathematical model of a complete cell containing a porous intercalation electrode with two characteristic particle sizes is presented. Galvanostatic cycling and relaxation phenomena on open‐circuit are compared to a cell with a single particle size. Electrodes with a particle‐size distribution show modestly inferior…
Conducting polymers and applicationsPolymer Surface Interaction StudiesElectrostatics and Colloid Interactions
J. Ravichandran、B. N. Sivasankar1997-12-01Clays and Clay Minerals
Abstract The acidic properties of acid-modified montmorillonite and vermiculite were determined by pyridine and ammonia adsorption to correlate with the alkylating and dehydrating activity of the activated samples. Treatment of the minerals with different concentrations of hydrochloric acid results in the variation of…
Zeolite Catalysis and SynthesisClay minerals and soil interactionsChemical Synthesis and Characterization
Cary T. Chiou、David W. Rutherford1997-12-01Clays and Clay Minerals
Abstract The effects of exchanged cation and layer charge on the sorption of water and ethylene glycol monoethyl ether (EGME) vapors on montmorillonite have been studied on SAz-1 and SWy-1 source clays, each exchanged respectively with Ca, Na, K, Cs and tetramethylammonium (TMA) cations. The corresponding lattice expa…
Concrete and Cement Materials ResearchSoil and Unsaturated FlowClay minerals and soil interactions
Yann Garcia、Petra J. van Koningsbruggen、G. Bravic 等 10 位作者1997-12-01Inorganic Chemistry
[Cu(hyetrz) 3 ](ClO 4 ) 2 ·3H 2 O (hyetrz = 4-(2-hydroxyethyl)-1,2,4-triazole) represents the first structurally characterized metal(II) chain compound containing triple N 1, N 2 -1,2,4-triazole bridges. The structure has been solved at 298 K by single-crystal X-ray analysis. catena -Poly[μ-tris(4-(2-hydroxyethyl)-1,2…
Metal complexes synthesis and propertiesMagnetism in coordination complexesLanthanide and Transition Metal Complexes
R. Sappey、E. Vincent、N. Hadacek 等 6 位作者1997-12-01Physical review. B, Condensed matter
We have performed magnetic measurements on a diluted system of $\ensuremath{\gamma}\ensuremath{-}{\mathrm{Fe}}_{2}{\mathrm{O}}_{3}$ nanoparticles $(d\ensuremath{\sim}7 \mathrm{nm})$, and on a ferritin sample. In both cases, the zero-field cooled (ZFC) peak presents a nonmonotonic field dependence, as has already been…
Magnetic properties of thin filmsMagnetism in coordination complexesElectron Spin Resonance Studies
Stefano V. Meille、Valeria Romita、Tullio Caronna 等 6 位作者1997-12-01Macromolecules
High molecular mass and high regioregularity favor the more common polymorph (form I) of poly(3-alkylthiophenes) and substantially extend toward high temperatures the existence domain of the 2D mesomorphic phase, which these systems access above 70−80 °C. Morphological observations indicate that in thin films of form…
Organic Electronics and PhotovoltaicsAdvanced Sensor and Energy Harvesting MaterialsConducting polymers and applications
Mari‐Ann Einarsrud、Eirik Hagen、Gunnar Pettersen 等 4 位作者1997-12-01Journal of the American Ceramic Society
The effect of relatively small additions (1‐5 wt%) of nickel, nickel boride (NiB), and iron to promote the liquid‐phase sintering of titanium diboride (TiB 2 ) has been studied. Carbon also was added to some samples, to reduce the amount of oxygen impurities in the TiB 2 ceramics. Green bodies that were formed by unia…
Advanced ceramic materials synthesisBoron and Carbon Nanomaterials ResearchAdvanced materials and composites
M. Vučelić、William Jones、Geoff D. Moggridge1997-12-01Clays and Clay Minerals
Abstract A combined powder X-ray diffraction (XRD) and X-ray absorption (XAS) study of Fe(III) cation ordering within pyroaurite is described. It is concluded that there is no correlation between Fe(III) cation positions over distances of a few tens of angstroms, but that there is a very high level of local ordering,…
Polyoxometalates: Synthesis and ApplicationsLayered Double Hydroxides Synthesis and ApplicationsInorganic Chemistry and Materials
Martine Chayer、Karim Faïd、Mario Leclerc1997-12-01Chemistry of Materials
Water-soluble sodium poly(2-(3-thienyloxy)ethanesulfonate) and sodium poly(2-(4-methyl-3-thienyloxy)ethanesulfonate) have been synthesized. The sulfonic acid form of these new polymers has revealed a self-acid-doping reaction that leads to stable, highly conducting (0.5−5 S/cm) materials together with low absorption i…
Conducting polymers and applicationsAnalytical Chemistry and SensorsPolydiacetylene-based materials and applications
M. J. de Ruijter、J. De Coninck、T. D. Blake 等 5 位作者1997-12-01Langmuir
We apply the molecular kinetic theory of wetting to the relaxation of the dynamic contact angle during the spreading of liquid droplets on solid surfaces. Experimental data have been obtained for several solid−liquid combinations and are successfully fitted using the theory. Physical parameters are extracted and inter…
Surface Modification and SuperhydrophobicityFluid Dynamics and Heat Transfernanoparticles nucleation surface interactions
Xiaoxia Qin、Kathryn J. Coyne、J. Herbert Waite1997-12-01Journal of Biological Chemistry
The primary structure of the alpha-chain of preCol-D (molecular mass = 80 kDa), a tanned collagenous protein predominating in the distal portion of the byssal threads of the mussel Mytilus edulis, was deduced from cDNA to encode an unprecedented natural block copolymer with three major domain types: a central collagen…
Knee injuries and reconstruction techniquesTendon Structure and TreatmentSilk-based biomaterials and applications
Ying Ma、Elizabeth Vileno、S. L. SUIB 等 4 位作者1997-12-01Chemistry of Materials
Hydrothermal synthesis of barium titanate was done by both microwave heating and conventional heating. The synthesis process was evaluated by examining samples at different processing times by X-ray diffraction. For samples produced by both heating methods, the metastable cubic phase crystallized first and gradually t…
Ferroelectric and Piezoelectric MaterialsMicrowave Dielectric Ceramics SynthesisMicrowave-Assisted Synthesis and Applications
Y. P. Handa、Zhiyi Zhang、Betty Wong1997-12-01Macromolecules
When treated with compressed CO 2, syndiotactic polystyrene (sPS) undergoes a number of solid−solid transitions that do not occur on treatment with liquid solvents. For example, planar mesophase → β, α → β, and γ → β transitions can be brought about under appropriate conditions of temperature and CO 2 pressure. In add…
Polymer crystallization and propertiesPolymer Foaming and CompositesAdsorption, diffusion, and thermodynamic properties of materials
Shoso Shingubara、Osamu Okino、Yasuyuki Sayama 等 5 位作者1997-12-01Japanese Journal of Applied Physics
Self-organization of a two-dimensional array of nanoholes which were formed by anodic oxidation of aluminum was investigated quantitatively using fast Fourier transformation (FFT) analysis of scanning electron microscopy (SEM) images. The highly ordered array of nanoholes with diameters of 26 nm was obtained by two-st…
Nanowire Synthesis and ApplicationsAnodic Oxide Films and NanostructuresNanoporous metals and alloys
I. Lukovits、Katalin Pálfi、Imre Bakó 等 4 位作者1997-12-01CORROSION
Interaction of corrosion inhibitors with metal surfaces in acidic solutions was investigated using a nonlinear model encompassing the Langmuir adsorption isotherm. A regression equation, with a multiple correlation coefficient equal to 0.95, was derived between the efficiencies of corrosion inhibition and molecular de…
Corrosion Behavior and InhibitionSurfactants and Colloidal Systems
Fu Wang、Sang Yup Lee1997-12-01Applied and Environmental Microbiology
Recombinant Escherichia coli XL1-Blue harboring a high-copy-number plasmid containing the Alcaligenes eutrophus polyhydroxyalkanoate synthesis genes could efficiently synthesize poly(3-hydroxybutyrate) (PHB) in a complex medium containing yeast extract and tryptone but not in a defined medium. One of the reasons for t…
biodegradable polymer synthesis and propertiesMicroplastics and Plastic PollutionBiopolymer Synthesis and Applications
Duck Young Chung、Kyoung-Shin Choi、Lykourgos Iordanidis 等 10 位作者1997-12-01Chemistry of Materials
β-K 2 Bi 8 Se 13 ( I ), K 2 Sb 8 Se 13 ( II ), K 2.5 Bi 8.5 Se 14 ( III ), and K 2.5 Sb 8.5 Se 14 ( IV ) were synthesized by a molten flux method. The black needles of compound I were formed at 600 °C and crystallized in the monoclinic P 2 1 / m space group (No. 11) with a = 17.492(3) Å, b = 4.205(1) Å, c = 18.461(4)…
High-pressure geophysics and materialsAdvanced Thermoelectric Materials and DevicesCrystal Structures and Properties