Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The crystal structure, dc and ac magnetic susceptibility, electron spin resonance and magnetoresistive behavior of Nd(x)Bi(0.5-x)Sr(0.5)MnO(3) (x = 0.1, 0.2, 0.3 and 0.4) compounds are studied. The Rietveld analysis of the XRD data shows that the samples crystallize in an orthorhombic perovskite structure, with Pbnm s…
A spherical model catalyst with a diameter of 4 mm and a granular model catalyst of 10−20 mesh were prepared by ordered packing of 22−293 nm monodisperse SiO 2 particles, which were prepared through hydrolysis and condensation of alkoxysilanes, and then calcinned at 800 °C. A mathematical model of oil diffusing in the…
Abstract Three water‐soluble dipeptides containing N‐terminally located β ‐alanine residue and C‐terminally located α ‐amino acid residues ( β ‐Ala‐ L ‐Xaa, Xaa = Val/Ile/Phe) form robust crystalline nanotubes. These dipeptide nanotubes contain a common motif, a hybrid of β,α ‐amino acids, which are stable against hea…
The effect of confinement on the structure evolution and final morphology during phase separation and gelation of gelatin and maltodextrin was investigated and compared to the structures seen in bulk phase. Emulsion droplets with diameters from 4 to 300 mum were analyzed using confocal laser scanning microscopy and im…
ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication to the EditorNEXTShifting the Order−Disorder Transition Temperature of Block Copolymer Systems with Electric FieldsHeiko G. Schoberth†, Kristin Schmidt‡, Kerstin A. Schindler†, and Alexander Böker*§View Author Information Lehrstuhl für Physikalische Che…
Abstract You can append on me! Porphyrin‐appended polynorbornenes derived from 5,6‐ endo ‐fused N ‐arylpyrrolidenonorbornenes have been shown to have coherently aligned pendant groups that exhibit exciton coupling and fluorescence quenching in the absorption and emission profiles (see figure). magnified image Six diff…
International audience
Abstract Without any surfactant, antiferromagnetic Co3O4 nanoparticles were synthesized successfully for the first time by means of an oxidation-reduction method with cobalt sulfate as starting material, which was oxidized to cobalt salt by NaNO3 after alkalinizing with NaOH. Morphological, structural, spectroscopic a…
FTIR spectroscopy was applied to the investigation of the nitrosyl complexes formed with the extra-framework iron species in Fe-ferrierite (Fe-FER). To clarify the loading effect on the nature of the species formed, six ferrierites with Fe loadings varying between 0 and 3.7 wt % were prepared via ionic exchange and in…
Very small spherical nanoparticles (size in the range of 2−5 nm) of Y 2 Sn 2 O 7 doped with both Ce 3+ and Tb 3+ were prepared by the urea hydrolysis of Y 3+, Sn 4+, Ce 3+, and Tb 3+ in ethylene glycol medium at 150 °C followed by heating at 700 °C. These nanoparticles exhibit very poor energy transfer between Ce 3+ a…
We present a molecular dynamics study of the dynamic scaling behavior of linear polymers in solution and in the melt when their character changes from fully flexible to semiflexible. The stiffness of the chains is determined by a bending potential. It is shown that the relaxation times tau(p) characterizing the intern…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Jason M. McMullan, Norman J. Wagner; Directed self-assembly of suspensions by large amplitude osc…
It is becoming evident that tissue-engineered constructs adapt to altered mechanical loading, and that specific combinations of multidirectional loads appear to have a synergistic effect on the remodeling. However, most studies of mechanical stimulation of engineered vascular tissue engineering employ only uniaxial st…
There is tremendous interest in water-compatible lanthanide triflate-based catalysts for carbon-carbon bond forming reactions; however, poor understanding of their aqueous mechanism severely limits the ability to increase the utility of these catalysts. Here, we report dynamic measurements of the water-coordination nu…
We report three prominent observations made on the nanoscale charge ordered (CO) manganites RE(1-x)AE(x)MnO(3) (RE = Nd,Pr; AE = Ca; x = 0.5) probed by temperature dependent magnetization and magneto-transport, coupled with electron magnetic/paramagnetic resonance spectroscopy (EMR/EPR). First, evidence is presented t…
Therapeutic proteins are prone to inactivation by aggregation, proteases and natural inhibitors, motivating development of protective delivery systems. Here we focus on protective encapsulation of the potent antioxidant enzyme, catalase, by filamentous polymer nanocarriers (f-PNC), with the specific goal of addressing…
Novel electroactive nanostructured silver molybdenum oxyfluoride (SMOF) perovskites Ag 1+ 3 Mo 6+ (O 3 F 3 ) have been successfully synthesized by a mechanochemical reaction. The formation of this perovskite was investigated throughout the Ag−Mo composition range with the use of either Ag 1+ or Ag 2+ in the form of Ag…
In this paper, a series of colloidal polymers with various T g, composition, and sphere size were synthesized by surfactant-free emulsion polymerization and dispersion polymerization methods and then blended with colloidal silica particles to obtain polymer/silica nanocomposite latexes. When these nanocomposite latexe…
Abstract Polytetrafluoroethylene (PTFE) latices with spherical and rod‐like particles in the submicrometer size range, were employed as seeds in the emulsifier‐free methylmethacrylate (MMA) emulsion polymerization to obtain PTFE‐polymethylmethacrylate (PMMA) core‐shell nanoparticles. Stable latices were generally obta…
The fracture toughness properties of duplex stainless steels (DSS) are strongly reduced by intermetallic phases, precipitating at 600–1000°C. In this investigation, the embrittlement effect induced by a low content of these phases has been studied in a 2205 DSS, by means of instrumented Charpy V impact testing. Differ…