Alain Walcarius、Cyril Delacôte2003-09-27Chemistry of Materials
Mercaptopropyl-functionalized silica spheres have been prepared by self-assembly co-condensation of mercaptopropyltrimethoxysilane (MPTMS) and tetraethoxysilane (TEOS) precursors in the presence of a cationic surfactant as templating agent and ammonia as catalyst. Several materials have been obtained by varying the MP…
Mesoporous Materials and CatalysisCovalent Organic Framework ApplicationsChemical Synthesis and Characterization
Yao Lin、Habib Skaff、Alexander Böker 等 6 位作者2003-09-27Journal of the American Chemical Society
The fabrication of functional nanostructured materials for sensing, encapsulation and delivery requires practical approaches to self-assembly on multiple length scales and the synthesis of tough yet permeable structures. Here, the self-assembly of functionalized, photoluminescent nanoparticles at liquid interfaces, fo…
Gold and Silver Nanoparticles Synthesis and ApplicationsQuantum Dots Synthesis And PropertiesPolymer Surface Interaction Studies
Milen Gateshki、J. M. Igartua2003-09-26Journal of Physics Condensed Matter
In the present work we report results from neutron and synchrotron radiation diffraction measurements that confirm the presence of a very weak phase transition in Sr 2 CuWO 6 at about 600 °C. This phase transition is continuous and changes the symmetry from I 4/ m at low temperature to another tetragonal phase at high…
Magnetic and transport properties of perovskites and related materialsCrystal Structures and PropertiesAdvanced Condensed Matter Physics
Paweł Krysiński、Yoshiuki Show、Jason Stotter 等 4 位作者2003-09-26Journal of the American Chemical Society
The surface of boron-doped diamond thin films can be modified by exposure to a strong oxidizing agent, resulting in the formation of -OH and =O terminated diamond. The -OH groups are reacted with an acid chloride to produce a covalently bound, modified diamond thin film surface. The demonstration of these reactions al…
Semiconductor materials and devicesDiamond and Carbon-based Materials ResearchElectronic and Structural Properties of Oxides
O. S. Tarasov、A. P. Krekhov、Lorenz Kramer2003-09-26Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
Motivated by Lehmann-like rotation phenomena in cholesteric drops we study the transverse drift of two types of cholesteric fingers, which form rotating spirals in thin layers of cholesteric liquid crystal in an ac or dc electric field. We show that electrohydrodynamic effects induced by Carr-Helfrich charge separatio…
Liquid Crystal Research AdvancementsLipid Membrane Structure and BehaviorCharacterization and Applications of Magnetic Nanoparticles
K. Ozawa、Kota Sawada、Y. Shirotori 等 5 位作者2003-09-26Physical review. B, Condensed matter
The band structure of surface electronic states on the $\mathrm{ZnO}(101\ifmmode\bar\else\textasciimacron\fi{}0)$ surface has been investigated by angle-resolved photoelectron spectroscopy utilizing synchrotron radiation. Photon-energy dependent measurement and the K and ${\mathrm{O}}_{2}$ adsorption studies have been…
ZnO doping and propertiesGa2O3 and related materialsElectronic and Structural Properties of Oxides
J. Kliava、I. S. Édelman、A.M. Potseluyko 等 9 位作者2003-09-26Journal of Physics Condensed Matter
Magnetic susceptibility, electron paramagnetic resonance (EPR) and optical absorption have been studied in a glass system 20La 2 O 3 –22Al 2 O 3 –23B 2 O 3 – 35(SiO 2 +GeO 2 ) with a part of La 2 O 3 substituted by Gd 2 O 3 in different concentrations. Positive Weiss constants have been found in more heavily doped gla…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsLanthanide and Transition Metal Complexes
Jing Guo、Muthanna H. Al‐Dahhan2003-09-26Industrial & Engineering Chemistry Research
The wet air oxidation kinetics of an aqueous solution of phenol was studied over extrudates of an Al−Fe pillared clay catalyst in the temperature range of 90−150 °C and air pressure range of 0.8−2.5 MPa. The variables studied included reaction temperature, air pressure, solution pH, initial phenol concentration, and c…
Catalytic Processes in Materials ScienceAdvanced oxidation water treatmentCoagulation and Flocculation Studies
Diganta Sarmah、Shashi D. Baruah2003-09-26Journal of Applied Polymer Science
Abstract Radical copolymerization of behenyl (systematic IUPAC nomenclature: n ‐docosyl) acrylate and behenyl fumarate has been carried out in toluene at 70°C using benzoyl peroxide as initiator. Gel permeation chromatography was used to determine molecular weights (MW) and molecular weight distribution (MWD) of behen…
Inorganic and Organometallic ChemistryThermal and Kinetic AnalysisPolymer Synthesis and Characterization
Atul Khanna、K J S Sawhney、M. K. Tiwari 等 5 位作者2003-09-26Journal of Physics Condensed Matter
Disc shaped samples of the glass composition: 0.40Bi 2 O 3 –0.60B 2 O 3 were prepared by a melt quenching technique by keeping the quenching rate constant but gradually increasing the melt annealing or ageing time from 15 to 220 min at a temperature of 850 °C. A total of five glass samples were prepared. Density, ultr…
Geological and Geochemical AnalysisMaterial Dynamics and PropertiesGlass properties and applications
Roni J. Kingsley、Rachel Van Gilder、Racquel Z. LeGeros 等 4 位作者2003-09-26Journal of Phycology
The ultrastructure and mineralogy of cultured and wild specimens of the green algae Acetabularia acetabulum were studied. Sites of calcification were clarified using TEM and SEM. Minerology was determined via electron diffraction, energy‐dispersive x‐ray microanalysis, and Fourier transform infrared spectral analyses…
Bone Tissue Engineering MaterialsPaleontology and Stratigraphy of FossilsCalcium Carbonate Crystallization and Inhibition
Y.C. Ratnakaram、R.P.S. Chakradhar、K. P. Ramesh 等 5 位作者2003-09-26Journal of Physics Condensed Matter
The effect of host glass composition on the optical absorption and fluorescence spectra of Nd 3+ has been studied in mixed alkali borate glasses of the type x Na 2 O–(30− x )K 2 O–69.5B 2 O 3 –0.5Nd 2 O 3 ( x = 5, 10, 15, 20 and 25). Various spectroscopic parameters such as Racah ( E 1 , E 2 and E 3 ), spin–orbit ( ξ…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsSolid State Laser Technologies
Edcleide Maria Araújo、Elias Hage、Antônio J. F. Carvalho2003-09-26Journal of Applied Polymer Science
Abstract The ductile–brittle transition temperatures were determined for compatibilized nylon 6/acrylonitrile‐butadiene‐styrene (PA6/ABS) copolymer blends. The compatibilizers used for those blends were methyl methacrylate‐ co ‐maleic anhydride (MMA‐MAH) and MMA‐ co ‐glycidyl methacrylate (MMA‐GMA). The ductile–brittl…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesFiber-reinforced polymer composites
R. Turgeman、Olga Gershevitz、O. Palchik 等 7 位作者2003-09-26Crystal Growth & Design
Highly ordered ZnO crystals of 0.15 μm width and 0.5 μm length were grown on silicon wafers coated with a monolayer of SiCl 3 (CH 2 ) 11 −O−C 6 H 5 molecules. Various techniques (contact angle measurements, ellipsometry, ATR-FTIR) were employed for determining the quality of the monolayer coating. In addition, the bar…
ZnO doping and propertiesQuantum Dots Synthesis And PropertiesGas Sensing Nanomaterials and Sensors
Robert B. Hammond、Caiyun Ma、Kevin J. Roberts 等 5 位作者2003-09-26The Journal of Physical Chemistry B
A systematic search method that identifies trial crystal structures by manipulating a molecular model in direct-space within a defined unit cell and comparing calculated and experimental powder X-ray data and assessing calculated lattice energies has been extended to allow simulation of crystal structures having two s…
Crystallography and molecular interactionsCrystallization and Solubility StudiesX-ray Diffraction in Crystallography
Christopher L. Lester、Shannon M. Smith、William L. Jarrett 等 4 位作者2003-09-26Langmuir
The synthesis of nanostructured polymer gels via polymerization of hydrophilic monomers in lyotropic liquid crystal (LLC) phases has recently been of great interest. This work describes the effects of monomer organization on the photopolymerization kinetics of acrylamide in various LLC phases of surfactant/water syste…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsMesoporous Materials and Catalysis
Pascal Viville、Roberto Lazzaroni、Éric Pollet 等 7 位作者2003-09-26Langmuir
This work deals with the preparation and the surface characterization of biodegradable nanocomposites made of poly(ε-caprolactone) (PCL) and a montmorillonite-type clay. Nanocomposites with different relative compositions of PCL and montmorillonite, either natural or organo-modified by various alkylammonium cations, a…
Polymer Nanocomposites and Propertiesbiodegradable polymer synthesis and propertiesPolymer Nanocomposite Synthesis and Irradiation
Mark Woods、Shanrong Zhang、Von Howard Ebron 等 4 位作者2003-09-26Chemistry - A European Journal
The lanthanide(III) complexes of three tetraamide DOTA bearing pyridyl, phenolic and hydroxypyridyl substituents have been studied by NMR, luminescence and cyclic voltammetry. The relaxivity profiles of the gadolinium complexes of the pyridyl and phenolic ligands were flat and essentially the same between pH 2 and 8.…
Advanced MRI Techniques and ApplicationsMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Steven J. Wang、Martin W. Brechbiel、Erik C. Wiener2003-09-26Investigative Radiology
RATIONALE AND OBJECTIVES: Dendrimer-based magnetic resonance imaging (MRI) contrast agents offer many advantages including high levels of amplification. The objective of this research was to test the adequacy and viability of a new family of dendrimers for use as MRI contrast agents in vitro and in vivo. METHODS: Dend…
Nanoparticle-Based Drug DeliveryLanthanide and Transition Metal ComplexesDendrimers and Hyperbranched Polymers
Miłosz Pawlicki、Lechosław Latos‐Grażyński2003-09-26Chemistry - A European Journal
Condensation of 2,4-bis(phenylhydroxymethyl)furan with pyrrole and p-toluylaldehyde formed, instead of the expected 5,20-diphenyl-10,15-di(p-tolyl)-2-oxa-21-carbaporphyrin, a pyrrole addition product [(H,pyr)OCPH]H(2); this product can formally be considered as an effect of hydrogenation of 3-(2'-pyrrolyl)-5,20-diphen…
Porphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation MechanismsPorphyrin Metabolism and Disorders