Jean‐François Létard、Philippe Guionneau、L. Rabardel 等 7 位作者1998-08-01OpenAlex
The new spin-crossover compound Fe(PM-BiA)(2)(NCS)(2) with PM-BiA = N-(2-pyridylmethylene)aminobiphenyl has been synthesized. The temperature dependence of chi(M)T (chi(M) = molar magnetic susceptibility and T = temperature) has revealed an exceptionally abrupt transition between low-spin (LS) (S = 0) and high-spin (H…
Lanthanide and Transition Metal ComplexesMagnetism in coordination complexesMetal-Catalyzed Oxygenation Mechanisms
Philip Coppens、Kersti Hermansson1998-08-01OpenAlex
Share Icon Share Twitter Facebook Reddit LinkedIn Reprints and Permissions Cite Icon Cite Search Site Citation Philip Coppens, Kersti Hermansson; X‐Ray Charge Densities and Chemical Bonding. Physics Today 1 August 1998; 51 (8): 66–68. https://doi.org/10.1063/1.882350 Download citation file: Ris (Zotero) Reference Mana…
Machine Learning in Materials ScienceX-ray Spectroscopy and Fluorescence AnalysisX-ray Diffraction in Crystallography
Chunxin Zhang、Florence Babonneau、Christian Bonhomme 等 7 位作者1998-08-01OpenAlex
Polyhedral octahydridosilsesquioxanes, [HSiO 1.5 ] 8 ( 1 ) and [(HSiMe 2 O)SiO 1.5 ] 8 ( 3 ) were hydrosilylatively copolymerized with stoichiometric amounts of the octavinylsilsesquioxanes, [vinylSiO 1.5 ] 8 ( 2 ) and [(vinylSiMe 2 O)SiO 1.5 ] 8 ( 4 ) in toluene using platinum divinyltetramethyldisiloxane, “Pt(dvs)”,…
Muon and positron interactions and applicationsSilicone and Siloxane ChemistryAdvanced ceramic materials synthesis
D. S. Coombs、Alberto Alberti、Thomas Armbruster 等 19 位作者1998-08-01OpenAlex
Abstract This report embodies recommendations on zeolite nomenclature approved by the International Mineralogical Association Commission on New Minerals and Mineral Names. In a working definition of a zeolite mineral used for this review, interrupted tetrahedral framework structures are accepted where other zeolitic p…
Crystal Structures and PropertiesClay minerals and soil interactionsZeolite Catalysis and Synthesis
Martin Grell、Donal D. C. Bradley、X. Long 等 7 位作者1998-08-01OpenAlex
We report on the physical characterization of a dioctyl-substituted polyfluorene, both in solution and in the solid state. We focus on studies of chain geometry both by molecular modeling and by gel permeation chromatography coupled with light scattering. We determine experimentally a Kuhn segment length, lk = 17.1 ±…
Luminescence and Fluorescent MaterialsMass Spectrometry Techniques and ApplicationsPhase Equilibria and Thermodynamics
Frank Caruso、Heinz Lichtenfeld、Michael Giersig 等 4 位作者1998-08-01OpenAlex
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTElectrostatic Self-Assembly of Silica Nanoparticle−Polyelectrolyte Multilayers on Polystyrene Latex ParticlesFrank Caruso, Heinz Lichtenfeld, Michael Giersig, and Helmuth MöhwaldView Author Information Max-Planck-Institute of Colloids and Interfaces Rudower Chaussee 5,…
Polymer Surface Interaction StudiesSurfactants and Colloidal SystemsMolecular Junctions and Nanostructures
Reinhold H. Dauskardt、Michael Lane、Qing Ma 等 4 位作者1998-08-01OpenAlex
A fracture mechanics technique to quantitatively measure the adhesion or interfacial fracture resistance of interfaces in thin film structures is described. Adhesion values obtained for the technologically important SiO2/TiN interface in microelectronic interconnect structures are related to a range of material, mecha…
Metal and Thin Film MechanicsAdvanced Surface Polishing TechniquesAdvanced ceramic materials synthesis
Young Ho Kim1998-08-01OpenAlex
It has been about 10 years since the first intentional preparation of hyperbranched polymer was disclosed. Hyperbranched polymers, as well as dendrimers, may find utilities in the areas where the structural uniqueness of these polymers gives merit. There has been much progress in the structural understanding and the m…
Ferrocene Chemistry and ApplicationsSynthesis and properties of polymersDendrimers and Hyperbranched Polymers
А. А. Абрикосов1998-08-01OpenAlex
An explanation is proposed of the unusual magnetoresistance, linear in magnetic field and positive, observed recently in nonstoichiometric silver chalcogenides. The idea is based on the assumption that these substances are basically gapless semiconductors with a linear energy spectrum. Most of the excess silver atoms…
Chalcogenide Semiconductor Thin FilmsNanocluster Synthesis and ApplicationsPhase-change materials and chalcogenides
Igor Levin、David Brandon1998-08-01OpenAlex
The available literature on the crystal structure of the metastable alumina polymorphs and their associated transitions is critically reviewed and summarized. All the metastable alumina structures have been identified as ordered or partially ordered cation arrays on the interstitial sites of an approximately close‐pac…
Advanced ceramic materials synthesisMicrowave Dielectric Ceramics SynthesisNuclear materials and radiation effects
Stephen Weiner、H. Daniel Wagner1998-08-01OpenAlex
▪ Abstract The term bone refers to a family of materials, all of which are built up of mineralized collagen fibrils. They have highly complex structures, described in terms of up to 7 hierarchical levels of organization. These materials have evolved to fulfill a variety of mechanical functions, for which the structure…
Cellular and Composite StructuresCalcium Carbonate Crystallization and InhibitionBone Tissue Engineering Materials
J.-H. Park、Patrick M. Woodward、John B. Parise1998-07-31Chemistry of Materials
The program POTATO, which was developed to model distorted perovskite structures, has been used to assess the stability of hypothetical compositions and guide the synthesis of new materials at high pressures and high temperatures. The initial result of this effort is the synthesis of two new perovskites, Ca 2 NdAgTi 4…
Advanced Condensed Matter PhysicsCrystal Structures and PropertiesMagnetic and transport properties of perovskites and related materials
Christoph Richard、Moritz Höffe、Joachim Hermisson 等 4 位作者1998-07-31Journal of Physics A Mathematical and General
We introduce a concept for random tilings which, comprising the conventional one, is also applicable to tiling ensembles without height representation. In particular, we focus on the random tiling entropy as a function of the tile densities. In this context, and under rather mild assumptions, we prove a generalization…
Quasicrystal Structures and Properties
Anthony Gichuhi、B. Edward Boone、Ümit Demir 等 4 位作者1998-07-31The Journal of Physical Chemistry B
We report an electrochemical, scanning probe microscopic, and Raman spectroscopic investigation of thin CdS films grown by electrochemical atomic layer epitaxy aimed at understanding the role played by the order of deposition on film quality. Using scanning tunneling microscopy (STM), we determine the atomic level str…
Quantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin FilmsMolecular Junctions and Nanostructures
Noriko Kanzaki、Kazuo Onuma、Atsuo Ito 等 6 位作者1998-07-31The Journal of Physical Chemistry B
The growth rate of the hydroxyapatite (0001) face in pseudophysiological solution was measured directly for the first time by Moire phase shift interferometry. Common-path-type interferometry and a newly developed signal processor used for the phase shift technique enabled the precise and stable measurement of growth…
Bone Tissue Engineering MaterialsCrystallization and Solubility StudiesCalcium Carbonate Crystallization and Inhibition
L. Scott Beall、Neelakandha S. Mani、Andrew J. P. White 等 6 位作者1998-07-31The Journal of Organic Chemistry
The amino-functionalized porphyrazines 1, 2, and 4 and norphthalocyanines 3 and 5, which were prepared via Linstead macrocyclization reactions of dinitrile precusors, were subject to UV-vis titrations in the presence of inorganic ions. These polydentate macrocycles are able to bind metal ions by the peripheral ligatin…
Porphyrin and Phthalocyanine ChemistryLuminescence and Fluorescent MaterialsPhotodynamic Therapy Research Studies
Song‐Ling Jia、Walter Jentzen、Mayou Shang 等 7 位作者1998-07-31Inorganic Chemistry
Axial ligation of nickel(II) 5,10,15,20-tetraphenylporphyrin (NiTPP) with pyrrolidine or piperidine has been investigated using X-ray crystallography, UV-visible spectroscopy, resonance Raman spectroscopy, and molecular mechanics (MM) calculations. By varying the pyrrolidine concentration in dichloromethane, distinct…
Metal complexes synthesis and propertiesPorphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer Studies
Č. Burdík、Ch Frougny、Jean‐Pierre Gazeau 等 4 位作者1998-07-31Journal of Physics A Mathematical and General
Recently, discrete sets of numbers, the -integers , have been proposed as numbering tools in quasicrystalline studies. Indeed, there exists a unique numeration system based on the irrational in which the -integers are all real numbers with no fractional part. These -integers appear to be quite appropriate for describi…
Quasicrystal Structures and PropertiesMineralogy and Gemology Studies
A. Kay、Elke Arenholz、Sungkwang Mun 等 8 位作者1998-07-31Science
Measurements and theoretical calculations are reported for an interatomic multi-atom resonant photoemission (MARPE) effect that permits direct determination of near-neighbor atomic identities (atomic numbers). MARPE occurs when the photon energy is tuned to a core-level absorption edge of an atom neighboring the emitt…
Electronic and Structural Properties of OxidesX-ray Spectroscopy and Fluorescence AnalysisElectron and X-Ray Spectroscopy Techniques
Hans Rogl、Kirstin Kosemund、Werner Kühlbrandt 等 4 位作者1998-07-31FEBS Letters
Two distinctly different membrane proteins, which produced inclusion bodies in Escherichia coli, have been refolded to reconstitute properties appropriate to their native counterparts. The method employed utilises nickel chelating chromatography, where the solubilised inclusion bodies bind, refold and elute. Our aims…
Bacterial Genetics and BiotechnologyRNA and protein synthesis mechanismsEnzyme Structure and Function