Christophe Detrembleur、Mariarosa Mazza、X. Lou 等 8 位作者2000-09-29Macromolecules
New functional aliphatic polyesters were prepared by chemical modification of brominated copolyesters. Poly(ε-caprolactone)- co -poly(γ-(2-bromo-2-methylpropionate)-ε-caprolactone) copolymer was prepared and successfully converted into copolyester bearing methacrylate double bonds by dehydrohalogenation of the pendant…
biodegradable polymer synthesis and propertiesCarbon dioxide utilization in catalysisDendrimers and Hyperbranched Polymers
Ricardo F. Aroca、R. E. Clavijo、Mathew D. Halls 等 4 位作者2000-09-29The Journal of Physical Chemistry A
The surface-enhanced Raman scattering (SERS) spectra for phthalimide (PIMH) vacuum evaporated, cast onto silver island films, and from colloidal silver are clearly identified with the formation of a phthalimide−silver complex (chemisorption). The phthalimide−silver complex (PIMAg) has been obtained from the PIMH potas…
Gold and Silver Nanoparticles Synthesis and ApplicationsElectrochemical Analysis and ApplicationsNanocluster Synthesis and Applications
Roberto Purrello、Antonio Raudino、Luigi Monsù Scolaro 等 6 位作者2000-09-29The Journal of Physical Chemistry B
In this paper we investigate the self-aggregation of tetracationic porphyrin meso -tetrakis( N -methylpyridinium-4-yl)porphinatocopper(II) (CuT4) onto a chiral polymeric matrix (polyglutamic acid, PG) as well as mixtures of tetracationic (CuT4) and tetraanionic, meso -tetrakis(4-sulfonatophenyl)porphine (H 4 TPPS), po…
Molecular Sensors and Ion DetectionSupramolecular Chemistry and ComplexesPorphyrin and Phthalocyanine Chemistry
Xueping Jiang、Paula T. Hammond2000-09-29Langmuir
A new approach to creating patterned composite structures with layer-by-layer assembled thin films is introduced. In this approach, the top surfaces of layer-by-layer films are chemically patterned by the direct stamping of functional polymers on the surface. The resulting pattern is then used as a template for the fu…
Polymer Surface Interaction StudiesMolecular Junctions and NanostructuresNanofabrication and Lithography Techniques
Brian Bergman、Timothy W. Hanks2000-09-29Macromolecules
Electrochemically grown films of polyaniline, polypyrrole, polythiophene, and poly(ethylenedioxythiophene) were treated with alkane- and fluoroalkanethiols for 1−24 h. The resulting films showed surface energies and polarities similar to glass slides coated with monolayers of the corresponding alkyl- and fluoroalkylsi…
Advanced Sensor and Energy Harvesting MaterialsConducting polymers and applicationsAnalytical Chemistry and Sensors
Benjamin T. King、Josef Michl2000-09-29Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTThe Explosive "Inert" Anion CB11(CF3)12-Benjamin T. King and Josef MichlView Author Information Department of Chemistry and Biochemistry University of Colorado, Boulder, Colorado 80309-0215 Cite this: J. Am. Chem. Soc. 2000, 122, 41, 10255–10256Publication Date (Web):S…
Mass Spectrometry Techniques and ApplicationsCrystallography and molecular interactionsLuminescence and Fluorescent Materials
Long Ba、Wei Sang Li2000-09-29Journal of Physics D Applied Physics
Nanosize pore arrays have been prepared by the self-organization process of aluminium anodic oxidation. The symmetry of the pore configuration has been analysed by using fast Fourier transformation. For different anodization temperatures, it has been found that lower temperatures yielded higher symmetry. The linear re…
Photonic Crystals and ApplicationsAnodic Oxide Films and NanostructuresSmart Materials for Construction
M Chen、Z.L. Pei、Xin Wang 等 7 位作者2000-09-29Journal of Physics D Applied Physics
Contributions of acoustical deformation scattering, ion impurity scattering and grain boundary potential scattering to the conductivity of TCO films have been calculated in order to deduce the intrinsic limit of conductivity of TCO films regardless of precise details of the preparation procedure. The results indicate…
ZnO doping and propertiesSemiconductor materials and devicesThin-Film Transistor Technologies
M. Francesca Ottaviani、Farida Furini、Angela Casini 等 7 位作者2000-09-29Macromolecules
Poly(amidoamine) starburst dendrimers (SBDs) form stable supramolecular structures (complexes) with DNA and confer protection against degradation by nucleases. Such properties make SBDs excellent candidates for application in gene delivery strategies. Formation of supramolecular structures by two generations of SBDs,…
DNA and Nucleic Acid ChemistryRNA Interference and Gene DeliveryDendrimers and Hyperbranched Polymers
Evangelos Manias、H. Chen、Ramanan Krishnamoorti 等 6 位作者2000-09-29Macromolecules
The motion of confined polymers is measured experimentally between parallel, atomically smooth solid surfaces, separated by 2 nm. In particular, the kinetics of intercalation of monodispersed polystyrene in alkylammonium modified mica-type silicates were studied using X-ray diffraction. The kinetics of the neat polyme…
Concrete and Cement Materials ResearchPolymer Nanocomposites and PropertiesPolymer Nanocomposite Synthesis and Irradiation
M Kleemann、Martin Elsener、Manfred Koebel 等 4 位作者2000-09-29Industrial & Engineering Chemistry Research
The hydrolysis of isocyanic acid (HNCO) was investigated on various oxidic catalysts, including TiO 2, V 2 O 5 /TiO 2, and V 2 O 5 −WO 3 /TiO 2 . The kinetics were studied using powdered samples in a microreactor. The conversions of HNCO are high even at the high space velocities (10 6 h -1 ) and low temperatures (150…
Catalytic Processes in Materials ScienceCatalysis and Hydrodesulfurization StudiesCatalysis and Oxidation Reactions
Carlo M. Carbonaro、Vincenzo Fiorentini、Fabio Bernardini2000-09-29arXiv
The E' center is a paradigmatic radiation-induced defect in SiO2 whose peculiar EPR and hyperfine activity has been known since over 40 years. This center has been traditionally identified with a distorted, positively-charged oxygen vacancy V_O+. However, no direct proof of the stability of this defect has ever been p…
Materials Science
Hui Hu、Dai-Jun Li、Jia-Lin Zhu 等 4 位作者2000-09-29arXiv
The size effects of an exciton in a nano-ring are investigated theoretically by using an effective-mass Hamiltonian which can be separated in terms of the center-of-mass and relative coordinates. The binding energy and oscillator strength of the ground state are calculated for two different ring radii as a function of…
Mesoscale and Nanoscale PhysicsMaterials Science
Hui Hu、Jia-Lin Zhu、Jia-Jiong Xiong2000-09-29arXiv
The effects of electron-electron interaction of a two-electron nanoring on the energy levels and far-infrared (FIR) spectroscopy have been investigated based on a model calculation which is performed within the exactly numerical diagonalization. It is found that the interaction changes the energy spectra dramatically,…
Mesoscale and Nanoscale PhysicsMaterials Science
E. P. K. Currie、Alexander B. Sieval、G. J. Fleer 等 4 位作者2000-09-29Langmuir
Polyelectrolyte brushes consisting of polystyrene−poly(acrylic acid) (PS−PAA) diblock copolymers were investigated experimentally using surface pressure isotherms and ellipsometry. The surface pressure π of the block copolymers at the air/water interface was measured as a function of the grafting density σ at various…
Surfactants and Colloidal SystemsPolymer Surface Interaction StudiesAnalytical Chemistry and Sensors
June Huh、Valeriy V. Ginzburg、Anna C. Balazs2000-09-29Macromolecules
We investigate the influence of hard nanoparticles on the phase behavior of diblock copolymers. Using Monte Carlo simulations, we obtain phase diagrams as a function of the nanoparticle size and concentration. When the size of the nanoparticles becomes comparable to the radius of gyration of the minority (A) block, we…
Material Dynamics and PropertiesSurfactants and Colloidal SystemsBlock Copolymer Self-Assembly
Harm‐Anton Klok、Josef F. Langenwalter、Sébastien Lecommandoux2000-09-29Macromolecules
The synthesis and supramolecular organization of a novel class of rod−coil type diblock oligomers will be discussed. The diblock oligomers consist of a rodlike α-helical oligopeptide segment that is conjugated to an oligo(styrene) coil. In comparison with most of the rod−coil type oligomers that have been investigated…
Chemical Synthesis and AnalysisSupramolecular Self-Assembly in MaterialsBlock Copolymer Self-Assembly
Masato Machida、Masatoshi Uto、Daisuke Kurogi 等 4 位作者2000-09-29Chemistry of Materials
Interactions of nitrogen oxides (NO x ) with ( n )MnO x −(1 − n )CeO 2 binary oxides were studied to use them for sorptive NO x removal at low temperatures (≃150 °C). The formation of MnO x −CeO 2 solid solutions with the fluorite-type structure at n ≃ 0.5 was found to be quite effective in accelerating NO x sorption…
Catalytic Processes in Materials ScienceGas Sensing Nanomaterials and SensorsIndustrial Gas Emission Control
Mingheng Li、Shanying Hu、Yourun Li 等 4 位作者2000-09-28Industrial & Engineering Chemistry Research
In this paper, a hierarchical optimization procedure for reaction path synthesis is presented in which the overall reaction is not necessarily desirable with respect to the thermodynamics or mechanism of reaction. According to the specified raw materials, desired product, and probable byproducts, the overall reactions…
Process Optimization and IntegrationInorganic and Organometallic ChemistryThermal and Kinetic Analysis
Krishna D. Jonnalagadda、Nancy R. Sottos、Muhammad A. Qidwai 等 4 位作者2000-09-28Smart Materials and Structures
The transformation behavior of an embedded shape memory alloy (SMA) ribbon was investigated experimentally and numerically. Single SMA ribbons (55% Ni, 45% Ti) were pre-strained to 1% and then embedded in a room-temperature-cured epoxy resin. The embedded ribbons were heated resistively to a temperature above the aust…
Polymer composites and self-healingShape Memory Alloy Transformations