G.A. Santillan、Carl J. Carrano2007-02-08Inorganic Chemistry
Complexes of Cu(II) derived from two new nonfacially coordinating heteroscorpionate ligands, (4-carboxyphenyl)bis(3,5-dimethylpyrazolyl)methane (L4c) and (3-carboxyphenyl)bis(3,5-dimethylpyrazolyl)methane (L3c), have been synthesized and characterized by X-ray diffraction, ESI-MS, IR, and UV-vis spectroscopy, electroc…
Metal-Organic Frameworks: Synthesis and ApplicationsMetal complexes synthesis and propertiesMagnetism in coordination complexes
Amit Kumar、Lane W. Martin、S. Denev 等 7 位作者2007-02-08Physical Review B
Multifunctional materials promise to provide the foundation for a class of devices in which electrical, magnetic, elastic, and other properties are coupled to one another. Here we present evidence for piezoelectricity and antiferromagnetic ordering in a multifunctional material $\mathrm{Pb}\mathrm{V}{\mathrm{O}}_{3}$.…
Magnetic and transport properties of perovskites and related materialsMultiferroics and related materialsAdvanced Condensed Matter Physics
Wai Hung Cheung、Vinci K. C. Lee、Gordon McKay2007-02-08Environmental Science & Technology
The combustion of wastes has very significant benefits in reducing the volume of waste materials and producing energy. However, combustion processes produce emissions, which must be below the Best Practical Means (BPM) specified legislative limits. Several wastes, such as tires and meat meal, have been successfully co…
Thermochemical Biomass Conversion ProcessesCatalytic Processes in Materials ScienceThermal and Kinetic Analysis
Izabela Czeluśniak、Ezat Khosravi、Alan M. Kenwright 等 4 位作者2007-02-08Macromolecules
This paper describes the synthesis of polylactide-functionalized polyoxanorbornenes and their hydrolytic degradation behavior. Macromonomers with one or two exo -PLA chains as well with two endo,exo chains were prepared using tin(II) 2-ethylhexanoate as a catalyst in the presence of mono- or dialcohol derivatives of o…
biodegradable polymer synthesis and propertiesSynthetic Organic Chemistry MethodsSilicone and Siloxane Chemistry
Stéphane Mornet、Catherine Elissalde、O. Bidault 等 7 位作者2007-02-08Chemistry of Materials
Nanoparticle technologies open the routes for nanostructured materials which combine individual physical properties or generate new functions. In the field of ferroelectric materials the development of dense nanocomposites requires breakthroughs in the elaboration step. Here, we propose a flexible process to obtain fe…
Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsMicrowave Dielectric Ceramics Synthesis
Andreas Hohenau、Joachim R. Krenn、F. J. García‐Vidal 等 7 位作者2007-02-08Physical Review B
Regular arrays of rectangular gold nanoparticles placed on gold films are characterized by using linear reflection spectroscopy (in the wavelength range of $450--950\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$) and nonlinear scanning optical microscopy, in which two-photon photoluminescence (TPL) excited with a strongly fo…
Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchNonlinear Optical Materials Studies
Siméon Ponou、Thomas F. Fässler2007-02-08Zeitschrift für anorganische und allgemeine Chemie
Abstract Deep‐red moisture and air sensitive single crystals of K 4 Ge 9 were obtained by reacting GeO 2 and elemental Ge with metallic W and K at high temperature in a niobium ampoule. The crystal structure of the compound was determined by single crystal X‐ray diffraction experiments. K 4 Ge 9 crystallizes in a pola…
Glass properties and applicationsSynthesis and characterization of novel inorganic/organometallic compoundsCrystal Structures and Properties
Motoi Yamashita、Akitaka Hoshino、Minoru Katō2007-02-08Journal of Polymer Science Part B Polymer Physics
Abstract Crystal growth of the trigonal form of isotactic poly(butene‐1) ( it ‐PB1) was successfully observed in the melt at atmospheric pressure. The growth rate of trigonal crystals was obtained by in situ optical microscopy. It is one hundredth that of it ‐PB1 tetragonal crystals. The growth rate of trigonal crysta…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
Daniel Torres、Núria López、Francesc Illas 等 4 位作者2007-02-08Angewandte Chemie
Ag ist nicht Cu: Bei der heterogen katalysierten Reaktion von coadsorbiertem Sauerstoff mit Propylen (siehe Bild, O rot, Propylen gelb/grün) resultiert der unterschiedliche Verlauf an Ag- und Cu-Oberflächen DFT-Rechnungen zufolge aus dem ersten Reaktionsschritt. Die Basizität des O-Atoms an Ag führt zur Abspaltung ein…
Catalytic Processes in Materials SciencePolyoxometalates: Synthesis and ApplicationsCatalysis and Oxidation Reactions
Irene Calizo、Khan A. Alim、Vladimir A. Fonoberov 等 7 位作者2007-02-08Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE
Nanostructures, such as quantum dots, nanocrystals and nanowires, made of wurtzite ZnO have recently attracted attention due to their proposed applications in optoelectronic devices. Raman spectroscopy has been widely used to study the optical phonon spectrum modification in ZnO nanostructures as compared to bulk crys…
ZnO doping and propertiesSilicon Nanostructures and PhotoluminescenceNanowire Synthesis and Applications
Marina M. Lezhnina、E. Benavente、Michael Bentlage 等 6 位作者2007-02-08Chemistry of Materials
Clay minerals, and within these, the smectite group, including the hectorites in focus, possess layered structures, in which interlayer chemistry may be applied to functionalize them optically. While luminescence from organic dyes has previously been described in the structurally closely related montmorillonites, atte…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsLanthanide and Transition Metal Complexes
Anil Kumar、Anshuman Jakhmola2007-02-08Langmuir
RNA-mediated fluorescent PbS nanoparticles have been synthesized in the quantum-confined region of a face-centered cubic phase. The binding of RNA to the surface of PbS nanoparticles has been exploited to tailor its size and to improve the stability and electronic properties. These particles display excitonic features…
Advanced biosensing and bioanalysis techniquesQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films
Peter G. Schunemann2007-02-08Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE
In the past two decades mid-IR nonlinear optical crystals have grown from scientific curiosities to practical robust materials generating efficient, multi-watt output in the 3-12&mgr;m spectral range. Nonetheless, improved NLO crystals are critical for further advancing mid-IR laser development. In particular, mid-IR…
Nonlinear Optical Materials ResearchPhotorefractive and Nonlinear OpticsSolid State Laser Technologies
Yutaka Tani、Takashi Ubukata、Yayoi Yokoyama 等 4 位作者2007-02-08The Journal of Organic Chemistry
A novel photochromic helicenoid diarylethene (R)-1-[1-(1-methoxymethoxyethyl)-2-naphtho[2,1-b]thienyl]-2-(2,4,5-trimethyl-3-thienyl)hexafluorocyclopentene was synthesized enantioselectively. It showed highly diastereoselective photocyclization (90% de) and a large change (950 degrees) in the specific optical rotation…
Porphyrin and Phthalocyanine ChemistryPhotochromic and Fluorescence ChemistryPhotoreceptor and optogenetics research
Rémy Besson、Sylvain Guyot、Alexandre Legris2007-02-08Physical Review B
The point defect and diffusion properties of A15 ${\mathrm{Nb}}_{3}\mathrm{Sn}$ are investigated using ab initio density functional theory calculations and statistical thermodynamics. The defect structure is found to be of antisite type, with small amounts of Nb vacancies, and Sn vacancies showing a trend towards inst…
Intermetallics and Advanced Alloy PropertiesNuclear Materials and PropertiesSuperconductivity in MgB2 and Alloys
Su Ying Quek、Jeffrey B. Neaton、Mark S. Hybertsen 等 5 位作者2007-02-08Physical Review Letters
Recent scanning tunneling microscopy studies of individual organic molecules on Si(001) reported negative differential resistance (NDR) above a critical applied field, observations explained by a resonant tunneling model proposed prior to the experiments. Here we use both density functional theory and a many-electron…
Graphene research and applicationsSemiconductor materials and devicesMolecular Junctions and Nanostructures
Toshifumi Yui、Sachio Hayashi2007-02-08Biomacromolecules
Swelling behaviors of cellulose I(alpha) and III(I) crystals have been studied using molecular dynamics simulations of the solvated finite-crystal models. The typical crystal models consisted of 48 x 10-mer chains. For the cellulose I(alpha) crystal, models consisting of different numbers of chains and chain lengths w…
Advanced Cellulose Research Studies
Giovanni Barcaro、Alessandro Fortunelli2007-02-08New Journal of Physics
The lowest energy structures and the diffusion energy barriers of small M N ( N = 1–4) Ag and Au clusters absorbed on the regular MgO (100) surface are investigated via density-functional (DF) calculations, using two different xc-functionals (PBE and LDA). In agreement with previous work, it is found that the lowest-e…
Advanced Chemical Physics StudiesZnO doping and propertiesCatalytic Processes in Materials Science
Marco Montalti、Nelsi Zaccheroni、Luca Prodi 等 5 位作者2007-02-08Journal of the American Chemical Society
The low quantum yield of luminescence in the NIR region of small (1.8 nm) gold nanoparticles stabilized with triphenylphosphine (TPP) increases by at least 2 orders of magnitude when TPP is replaced with a pyrene derivative. Very efficient energy transfer from the bound fluorophores to the gold core was observed, lead…
Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesNanocluster Synthesis and Applications
Luca Delfini、Stefano Lepri、Roberto Livi 等 4 位作者2007-02-08Journal of Statistical Mechanics Theory and Experiment
We study the dynamics of long-wavelength fluctuations in one-dimensional (1D) many-particle systems as described by self-consistent mode-coupling theory. The corresponding non-linear integro-differential equations for the relevant correlators are solved analytically and checked numerically. In particular, we find that…
Thermal properties of materialsAdvanced Thermodynamics and Statistical MechanicsThermal Radiation and Cooling Technologies