Thomas Devic、M. Evain、Yves Moëlo 等 7 位作者2003-02-14Journal of the American Chemical Society
The ability of I...I van der Waals interactions to direct the self-assembly of slabs of the radical cation of ethylenedithio-1,2-diiodo-tetrathiafulvalene, EDT-TTF-I(2), and polymeric lead iodide covalent anionic layers is demonstrated by the synthesis of single crystals of beta-(EDT-TTF-I(2))(2)(.+)[(Pb(5/6) square (…
Perovskite Materials and ApplicationsMolecular Junctions and NanostructuresOrganic and Molecular Conductors Research
Li、Michel H. J. Koch、Wim H. de Jeu2003-02-14Macromolecules
Simultaneous small- and wide-angle X-ray scattering has been employed to monitor the temperature dependence of the crystalline structure and morphology of nylon-12. Wide-angle measurements reveal that the α‘-phase is a stable high-temperature crystalline phase. Upon cooling, a crystalline transition takes place from t…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesFiber-reinforced polymer composites
Hui Zhang、Xiangyang Ma、Jin Xu 等 5 位作者2003-02-14Nanotechnology
A sol–gel process and a nanochannel aluminium template were employed to fabricate an orderly array of ZnO nanowires. The ZnO nanowires, with a hexagonal structure, were identified by means of x-ray diffraction and selected-area electron diffraction. The arrays of ZnO nanowires were characterized by scanning electron m…
ZnO doping and propertiesAnodic Oxide Films and NanostructuresGa2O3 and related materials
Mehdi Tajvidi、Ghanbar Ebrahimi2003-02-14Journal of Applied Polymer Science
Abstract Water uptake characteristics and some mechanical properties of polypropylene composites containing three types of natural fillers, purified α‐cellulose, wastepaper fibers, and wood flour were studied. The fiber contents were 15, 25, and 35% by weight. Two percent maleic anhydride polypropylene (MAPP) was also…
Mechanical Behavior of CompositesPolymer Nanocomposites and PropertiesNatural Fiber Reinforced Composites
Peter G. Bolhuis、Evert Jan Meijer、Ard A. Louis2003-02-14Physical Review Letters
We computed the phase-separation behavior and effective interactions of colloid-polymer mixtures in the "protein limit," where the polymer radius of gyration is much larger than the colloid radius. For ideal polymers, the critical colloidal packing fraction tends to zero, whereas for interacting polymers in a good sol…
Phase Equilibria and ThermodynamicsProteins in Food SystemsMaterial Dynamics and Properties
Hiromasa Tanaka、Sven Neukermans、Ewald Janssens 等 5 位作者2003-02-14Journal of the American Chemical Society
Experimental and theoretical evidence for a "sigma aromatic" bimetallic cluster is presented. A mass spectrometric analysis of AuNZn+ (N = 2-44) photofragments shows Au5Zn+ to be very abundant, proving its high stability. Calculations predict that Au5Zn+ has a planar geometry and six valence s electrons occupying delo…
Organometallic Complex Synthesis and CatalysisSynthesis and Properties of Aromatic CompoundsNanocluster Synthesis and Applications
Antonio Facchetti、Alessandro Abbotto、Luca Beverina 等 8 位作者2003-02-14Chemistry of Materials
The synthesis of the heterocycle-based diethanolaminomethyl-functionalized derivative 1-(pyridin-4-yl)-2-[( N -methylpyrrol-2-yl)-5-methylenediethanolamine]ethene ( 2 ) from (1-pyridin-4-yl)-2-( N -methyl-pyrrol-2-yl)ethene ( 1 ) and their methylpyridinium dyes 1-( N -methylpyridinio)-2-[( N -methylpyrrol-2-yl)-5-meth…
Porphyrin and Phthalocyanine ChemistryMolecular Junctions and NanostructuresNonlinear Optical Materials Research
Hisashi Kajiura、Shigemitsu Tsutsui、Koji Kadono 等 6 位作者2003-02-14Applied Physics Letters
The hydrogen storage capacity of five types of commercially available carbon materials with different nanostructures was measured at up to 8 MPa at room temperature using an apparatus based on a volumetric method with an error of less than 0.04 wt %/gr. The highest storage capacity of 0.43 wt % was obtained for purifi…
Advancements in Battery MaterialsCarbon Nanotubes in CompositesHydrogen Storage and Materials
Kathleen Di Zio、David A. Tirrell2003-02-14Macromolecules
Genetic engineering methods were used for the preparation of artificial proteins containing sequences designed to reproduce essential features of the extracellular matrix (ECM). The long-term objective of the work is to develop matrices for use in the engineering of small-diameter vascular grafts. The CS5 domain of fi…
Electrospun Nanofibers in Biomedical ApplicationsConnective tissue disorders researchSilk-based biomaterials and applications
S. Lebègue、M. Alouani、B. Arnaud 等 4 位作者2003-02-14arXiv
A pressure-induced simultaneous metal-insulator transition (MIT) and structural-phase transformation in lithium hydride with about 1% volume collapse has been predicted by means of the local density approximation (LDA) in conjunction with an all-electron GW approximation method. The LDA wrongly predicts that the MIT o…
Materials ScienceStrongly Correlated Electrons
František Máca、Alexander B. Shick、Josef Redinger 等 5 位作者2003-02-14arXiv
Ni/Cu(001) is known as a unique system showing the spin-reorientation transition from an in-plane to out-of-plane magnetization direction when the Ni-overlayer thickness is increased. We investigate different relaxed multilayer structures with a hydrogen adlayer using the full-potential linearized augmented plane-wave…
Materials Science
Y. D. Jho、D. S. Kim、A. J. Fischer 等 7 位作者2003-02-14arXiv
Femtosecond pump-probe (PP) differential reflectivity spectroscopy (DRS) and four-wave mixing (FWM) experiments were performed simultaneously to study the initial temporal dynamics of the exciton line-shapes in GaN epilayers. Beats between the A-B excitons were found \textit{only for positive time delay} in both PP an…
Materials Science
Bas B. Van Aken、Oana D. Jurchescu、Auke Meetsma 等 6 位作者2003-02-14Physical Review Letters
We present evidence that the insulator-to-metal transition in ${\mathrm{L}\mathrm{a}}_{1\ensuremath{-}x}{\mathrm{C}\mathrm{a}}_{x}{\mathrm{M}\mathrm{n}\mathrm{O}}_{3}$ near $x\ensuremath{\sim}0.2$ is driven by the suppression of coherent Jahn-Teller distortions, originating from $d$-type orbital ordering. The orbital-…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
B. Chakrabarti、C. Dasgupta2003-02-14arXiv
Conserved growth models that exhibit a nonlinear instability in which the height (depth) of isolated pillars (grooves) grows in time are studied by numerical integration and stochastic simulation. When this instability is controlled by the introduction of an infinite series of higher-order nonlinear terms, these model…
cond-mat.dis-nnMaterials Sciencecond-mat.stat-mech
Hidenori Hiramatsu、Kazushige Ueda、Hiromichi Ohta 等 6 位作者2003-02-14Applied Physics Letters
Epitaxial films of LaCuOS1−xSex (x=0–1) solid solution were grown on MgO (001) substrates and their electrical and optical properties were examined. Sharp emission due to room-temperature exciton with binding energy of ∼50 meV is observed for all x values. Hall mobility becomes large with an increase in the Se content…
ZnO doping and propertiesCopper-based nanomaterials and applicationsElectronic and Structural Properties of Oxides
S. Z. Malynych、George Chumanov2003-02-14Journal of the American Chemical Society
Silver nanoparticles arranged in two-dimensional arrays experience quadrupolar coupling of plasmon resonances when irradiated with visible light. This coupling leads to the formation of the coherent plasmon mode characterized by an intense narrow resonance in the blue spectral range in the extinction spectrum. The cou…
Gold and Silver Nanoparticles Synthesis and ApplicationsPlasmonic and Surface Plasmon ResearchNonlinear Optical Materials Studies
Vilas G. Pol、Aharon Gedanken、José Maria Calderón-Moreno2003-02-14Chemistry of Materials
Gold nanoparticles with an average size of ∼5 nm were deposited on the surface of preformed silica submicrospheres with the aid of power ultrasound. The sonochemical reduction was carried out by ultrasonic irradiation in an argon atmosphere at room temperature. Ultrasonic irradiation of a slurry of silica submicrosphe…
Gold and Silver Nanoparticles Synthesis and ApplicationsUltrasound and Cavitation PhenomenaLaser-Ablation Synthesis of Nanoparticles
G.A. Mills、Mark S. Gordon、Horia Metiu2003-02-14The Journal of Chemical Physics
It has been shown recently that while bulk gold is chemically inert, small Au clusters are catalytically active. The reasons for this activity and its dramatic dependence on cluster size are not understood. We use density functional theory to study O2 binding to Au clusters and to a Au(111) surface modified by adsorpt…
Advanced Chemical Physics StudiesCatalytic Processes in Materials ScienceMolecular Junctions and Nanostructures
Ka Yee Ho、Gordon McKay、King Lun Yeung2003-02-14OpenAlex
Ordered mesoporous silica adsorbents were prepared by grafting amino- and carboxylic-containing functional groups onto MCM-41 for the removal of Acid blue 25 and Methylene blue dyes from wastewater. The amino-containing OMS−NH 2 adsorbent has a large adsorption capacity and a strong affinity for the Acid blue 25. It c…
Adsorption and biosorption for pollutant removalCatalytic Processes in Materials ScienceMesoporous Materials and Catalysis
Frank Neese2003-02-14OpenAlex
The derivation, implementation, and validation of a method to calculate spin–orbit coupling (SOC) contributions to the hyperfine coupling (HFC) is reported. Due to this development it is now possible to calculate the complete ligand and metal nuclei HFCs at a consistent level of theory, i.e., spin unrestricted Hartree…
Advanced Chemical Physics StudiesMagnetism in coordination complexesAdvanced NMR Techniques and Applications