Caiqi Wang、Yuping Dong、Huimin Tan2002-12-05Journal of Polymer Science Part A Polymer Chemistry
Abstract After the protection of partial hydroxyl groups with trimethylsilyl (TMS) groups, hydroxypropyl cellulose becomes soluble in organic solvents, and the number of hydroxyl groups as initiating groups can be controlled. As a result, a new brushlike graft poly(ϵ‐caprolactone) can be prepared with hydroxypropyl ce…
Bone Tissue Engineering MaterialsHydrogels: synthesis, properties, applicationsbiodegradable polymer synthesis and properties
P. M. Campbell、E. S. Snow、James P. Novak2002-12-05Applied Physics Letters
We describe a simple technique to grow small (approximately 1–4 nm) diam carbon nanotubes both in and out of the plane of a silicon substrate using the decomposition of ethylene and a nickel–iron thin film catalyst. This procedure can be used to produce nanotubes for ultrasharp atomic force microscope probes as well a…
Carbon Nanotubes in CompositesForce Microscopy Techniques and ApplicationsMechanical and Optical Resonators
Xueguo Zhao、Jianlin Shi、Bin Hu 等 5 位作者2002-12-05Journal of Materials Chemistry
Nano-sized Cd3P2 has been confined inside the pore channels of MCM-41 by a surface modification method. XRD, TEM, N2 adsorption/desorption, UV-vis absorption and photoluminescence (PL) spectroscopy, elemental analysis and XPS techniques were used to characterize the Cd3P2/MCM-41 composites. Cd3P2 nanoclusters were mos…
Quantum Dots Synthesis And PropertiesMesoporous Materials and CatalysisNanocluster Synthesis and Applications
Barbara Capogrosso-Sansone、R. A. Guyer2002-12-05Physical review. B, Condensed matter
A model for the dynamical behavior of a hysteretic elastic system is introduced and studied numerically. This model consists of a chain of hysteretic elastic elements. Each elastic element is a spring with properties that depend on an Ising-like state variable having Brownian dynamics in an energy landscape with struc…
Ultrasonics and Acoustic Wave PropagationForce Microscopy Techniques and ApplicationsMagnetic Properties and Applications
V.A. Money、Ivana Radosavljević Evans、Malcolm A. Halcrow 等 5 位作者2002-12-05Chemical Communications
The spin-crossover complex [FeL2](BF4)2 undergoes a LIESST transition at 30 K on irradiation; the structures of the low-spin ground and high-spin metastable states at this temperature are presented.
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryLanthanide and Transition Metal Complexes
Pingxiong Yang、David Carroll、John Ballato 等 4 位作者2002-12-05Applied Physics Letters
The temperature dependence of electrical properties for SrBi2Ta2O9 thin film capacitors with platinum electrodes (Pt/SBT/Pt) on silicon wafers was studied from 10 to 300 K. With a decrease in temperature from 300 to 200 K, the remanent polarization of the thin films shows about an 11% reduction from its 300 K value; h…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesMicrowave Dielectric Ceramics Synthesis
Yetta Porter、P. Shiv Halasyamani2002-12-05Inorganic Chemistry
The syntheses, structures, and characterization of four new lead(II)-tellurium(IV)-oxide halides, Pb(3)Te(2)O(6)X(2) and Pb(3)TeO(4)X(2) (X = Cl or Br) are reported. The materials are synthesized by solid-state techniques, using Pb(3)O(2)Cl(2) or Pb(3)O(2)Br(2) and TeO(2) as reagents. The compounds have three-dimensio…
Crystal structures of chemical compoundsCrystal Structures and PropertiesSolid-state spectroscopy and crystallography
Dong‐Liang Peng、Toshihiro Asai、N. Nozawa 等 5 位作者2002-12-05Applied Physics Letters
We report the magnetic properties and magnetoresistance (MR) in small iron oxide (Fe3−xO4 and Fe3O4) cluster assemblies. Half-metallic Fe3O4 cluster assembly with grain size of 10–15 nm is shown to exhibit a MR value of about 8% at T=30 K and a peak around the Verwey transition temperature Tv=115 K which is a little l…
Magnetic properties of thin filmsMagnetic Properties and Synthesis of FerritesAdvanced Condensed Matter Physics
John F. Berry、F. Albert Cotton、Peng Lei 等 4 位作者2002-12-05Inorganic Chemistry
The compound Cu3(dpa)4Cl2, 1 (dpa = the anion of dipyridylamine), which was first synthesized and characterized in 1990, has been structurally characterized in three new crystal forms having Cu...Cu separations of 2.47-2.49 A. Its magnetic properties have been studied fully. Reaction of Cu3(dpa)4Cl2 with 2 equiv of si…
Metal complexes synthesis and propertiesMolecular Sensors and Ion DetectionMagnetism in coordination complexes
Jin Gyu Park、S. H. Lee、B. Kim 等 4 位作者2002-12-05Applied Physics Letters
Polypyrrole (PPy) nanotubes were synthesized using the pores of track-etched polycarbonate membrane as a template. Its size depends on the pore diameter of template, range from 50 to 200 nm. Direct I–V measurements of PPy nanotube (diameter of 120 nm) deposited on Au were done using a metal-coated tapping-mode atomic-…
Conducting polymers and applicationsMolecular Junctions and NanostructuresForce Microscopy Techniques and Applications
Jianchun Bao、Quanfa Zhou、Jianming Hong 等 4 位作者2002-12-05Applied Physics Letters
Highly-ordered arrays of Ni-filled carbon nanotubes have been fabricated by a second-order template method. First, an array of aligned carbon nanotubes was generated in a porous alumina membrane by catalytic pyrolysis of acetylene. The desired material, such as nickel, was then filled into the aligned carbon nanotubes…
Carbon Nanotubes in CompositesGraphene research and applicationsSmart Materials for Construction
Christian D. Grant、Adam Schwartzberg、Thaddeus J. Norman 等 4 位作者2002-12-05Journal of the American Chemical Society
We report the first direct observation of the ultrafast electronic relaxation and coherent vibrational oscillation of strongly interacting gold nanoparticle aggregates measured by femtosecond laser spectroscopy. The electronic relaxation, reflected as a fast decay component with a time constant of 1.5-2.5 ps, becomes…
Gold and Silver Nanoparticles Synthesis and ApplicationsNonlinear Optical Materials StudiesLaser-Ablation Synthesis of Nanoparticles
Raju Adhikari、Pathiraja A. Gunatillake、Simon J. McCarthy 等 5 位作者2002-12-05Journal of Applied Polymer Science
Abstract A series of six polyurethanes were prepared to study the effect of silicon chain extender structure on properties and morphology of siloxane–polyurethanes. Polyurethanes were prepared by a two‐step bulk polymerization without a catalyst. The soft segment of the polyurethanes was based on an 80:20 (w/w) mixtur…
Polymer composites and self-healingBuilding materials and conservationSilicone and Siloxane Chemistry
Zhikuan Chai、Xiao Zheng、Xuefei Sun2002-12-05Journal of Polymer Science Part B Polymer Physics
Abstract Polymer microspheres are obtained by the dropwise addition of a precipitant, containing a polymeric stabilizer, into a polymer solution, containing a polymeric stabilizer. The polymer and stabilizer concentrations, the stirring speed, and the precipitation temperature determine the size and size uniformity of…
Synthesis and properties of polymersSilicone and Siloxane Chemistry
Seungwon Lee、Jeongnim Kim、Lars Jönsson 等 6 位作者2002-12-05Physical review. B, Condensed matter
Many-body levels of optically excited and multiply charged InAs nanocrystals are studied with the semiempirical tight-binding model. Single-particle levels of unstrained spherical InAs nanocrystals are described by the ${\mathrm{sp}}^{3}{d}^{5}{s}^{*}$ nearest-neighbor tight-binding model including spin-orbit coupling…
Semiconductor Quantum Structures and DevicesQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films
Takashi Ito、Li Sun、Richard M. Crooks2002-12-05Electrochemical and Solid-State Letters
The electrochemical properties of individual multiwall carbon nanotubes (MWNTs) coated with an amorphous carbon layer are reported. MWNTs were etched at potentials more positive than 1.7 V vs. Ag/AgCl (3 M NaCl) in an aqueous 0.1 M KCl electrolyte solution. The logarithm of etching rate was proportional to the applied…
Carbon Nanotubes in CompositesSupercapacitor Materials and FabricationNanopore and Nanochannel Transport Studies
Chanthipa Vajrasthira、Taweechai Amornsakchai、Sauvarop Bualek‐Limcharoen2002-12-05Journal of Applied Polymer Science
Abstract The mechanical and dynamic mechanical properties of thermoplastic polyurethane (TPU) elastomers reinforced with two types of aramid short fibers, m ‐aramid (Teijin‐Conex) and copoly( p ‐aramid) (Technora), were investigated in this study with respect to the fiber loading. In general, both types of composites…
Polymer Nanocomposites and PropertiesPolymer composites and self-healingFiber-reinforced polymer composites
Noelia Zambrano、Eric Tyrode、Isabel Mira 等 6 位作者2002-12-05Industrial & Engineering Chemistry Research
The rate of addition of the internal phase influences the catastrophic inversion of emulsions in the direction of change from abnormal to normal morphology. At a low addition rate, the inversion takes place after a small amount of the internal phase is added, and it happens through the occurrence of multiple emulsion…
Proteins in Food SystemsEnhanced Oil Recovery TechniquesPickering emulsions and particle stabilization
Isabel Mira、Noelia Zambrano、Eric Tyrode 等 7 位作者2002-12-05Industrial & Engineering Chemistry Research
The stirring intensity has a complex effect on the catastrophic inversion of emulsions in the direction of change from abnormal to normal morphology. At both low and high stirring energy, the inversion takes place early, after a low amount of the internal phase is added and through the occurrence of a multiple emulsio…
Proteins in Food SystemsPickering emulsions and particle stabilizationElectrohydrodynamics and Fluid Dynamics
A. Bibby、Louis Mercier2002-12-05Green Chemistry
The adsorption properties of various water-soluble aromatic molecules (p-nitrophenol, p-nitroaniline, m-nitrophenol, p-chlorophenol and phenol), with CD-HMS, a new class of cyclodextrin-containing materials with uniform framework mesoporosity, has been investigated. The adsorption isotherms, uptake kinetics and distri…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisAnalytical Chemistry and Chromatography