Materials Literature
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The selective two-electron reduction of dioxygen occurs in the case of a monocobalt porphyrin [Co(OEP)], whereas the selective four-electron reduction of dioxygen occurs in the case of a cofacial dicobalt porphyrin [Co(2)(DPX)]. The other cofacial dicobalt porphyrins [Co(2)(DPA), Co(2)(DPB), and Co(2)(DPD)] also catal…
Gold nanowires with a two-dimensional (2-D) network structure were formed by citrate reduction of AuCl4- with a low concentration of citrate. The structure change during the growth processes was observed by transmission electron microscopy (TEM) and the variation in concentrations of gold species in the aqueous soluti…
Abstract Biodegradability of cellulose fabrics was evaluated by use of a soil burial test, an activated sewage sludge test, and an enzyme hydrolysis. Surface changes after biodegradation were observed by optical microscopy. From X‐ray diffraction analysis (XRD), changes in the crystallinities and the internal structur…
The effect of organically modified montmorillonite clay addition on crystallization of a polymer matrix has been studied. Two types of commercially available organoclays with different extent of miscibility with a polymer matrix were employed, leading to fully exfoliated (high miscibility) and intercalated (low miscib…
We propose a cascaded energy transfer structure made of semiconductor nanocrystals. Funnel-like band gap profiles are realized applying layer-by-layer assembly to CdTe nanocrystals of distinct sizes. Optical excitations efficiently transfer along the band gap gradient and are finally captured by the largest nanocrysta…
Abstract Six solvents [acetic acid, acetonitrile, m ‐cresol, toluene, tetrahydrofuran (THF) and dimethylformamide (DMF)] with different properties (eg density, boiling point, solubility parameter, dipole moment and dielectric constant) were used to prepare electrospun polystyrene (PS) fibers. Fiber diameters were foun…
This paper presents methods for solution casting and transfer printing collections of individual single-walled carbon nanotubes (SWNTs) onto a wide range of substrates, including plastic sheets. The deposition involves introduction of a solvent that removes surfactant from a suspension of SWNTs as it is applied to a s…
We study a model in which particles interact with short-ranged attractive and long-ranged repulsive interactions, in an attempt to model the equilibrium cluster phase recently discovered in sterically stabilized colloidal systems in the presence of depletion interactions. At low packing fractions, particles form stabl…
Abstract 3‐(2,3‐Dihydroxypropoxy)propyl‐terminated polydimethylsiloxanes (DHT‐PDMS) samples were prepared through the copolymerization of 1,1,3,3,5,5,7,7‐octamethylcyclotetrasiloxane (D 4 ) and 1,3‐bis[3‐(2,3‐dihydroxypropoxy)propyl]‐1,1,3,3‐tetramethyldisiloxane by acid‐catalyzed equilibration. Their structures were…
Abstract We present the first measurements of the simultaneous diffusion, surface enhancement, and evaporation of a plasticizer from a polymer, thin‐film matrix using neutron reflection techniques. The reflectivity profiles as a function of the annealing time at an elevated temperature yield the time‐dependent, plasti…
Structural and morphological studies were carried out on cerium- and gadolinium-doped sol−gel silica glasses intended for scintillator applications, to deepen the understanding of rare earth ion incorporation into the glass matrix. Several compositions, ranging from 0 to 5 mol % Ce and from 0 to 8 mol % Gd, were studi…
A new series of magnetoresistive oxides based on the ${\mathrm{CaCu}}_{3}{\mathrm{Mn}}_{4}{\mathrm{O}}_{12}$ perovskite has been investigated by x-ray absorption and neutron powder diffraction. The samples were either doped at $\mathrm{Cu}$ sites by $\mathrm{Mn}$ or by $\mathrm{La}$ at $\mathrm{Ca}$ sites. The x-ray a…
Abstract The thermodynamic interactions between poly(4‐ tert ‐butyl styrene) [P(4tBS)] and 1,4‐polyisoprene (PI; both hydrogenous) were obtained as functions of the temperature, PI molecular weight, and blend composition through the examination of miscible ternary blends of these two components with a common miscible…
Auseinander und wieder zusammen: Die Spaltung hochmolekularer linearer Koordinationspolymere aus Phosphan-telechelem Polytetrahydrofuran und Palladiumdichlorid in verdünnter Lösung ist reversibel (siehe Bild). 1 h Beschallung führte zu einer Abnahme des gewichtsgemittelten Molekulargewichts des Polymers von 1.7×105 au…
1.1 Bonding of Carbon Atoms 2 1.2 Defect-Free Nanotube 3 1.3 Defective Nanotubes 6 1.4 Electronic Properties 8 1.5 Optical and Optoelectronic Properties 12 1.6 Mechanical and Electromechanical Properties 14 1.7 Magnetic and Electromagnetic Properties 17 1.8 Chemical and Electrochemical Properties 18 Wetting and Fillin…
A micropatterned multilayer film, which was fabricated from layer-by-layer electrostatic self-assembly of nitrodiazoresin (NDR)/poly(acrylic acid) (PAA) followed by photolithography, was utilized as a structured template for the biomimetic mineralization of calcium carbonate. Micropatterned CaCO3 films consisting of r…
We study the slow dynamics of salol by varying both temperature and pressure using photon correlation spectroscopy and pressure-volume-temperature measurements, and compare the behavior of the structural relaxation time with equations derived within the Adam-Gibbs entropy theory and the Cohen-Grest free volume theory.…
During the last decade, a number of methodological and technical improvements in macromolecular crystallography (MC) led to the appearance of several protein structures at a level of resolution higher than 0.85 Å. This leads to the possibility of analysing the structure at a very fine level of detail: one can refine m…
13 C NMR has been used to investigate the segmental dynamics of isolated polyisoprene (PI) chains in host matrices of polybutadiene (PB), poly(vinylethylene) (PVE), and polystyrene (PS). In the dilute regime, where intermolecular concentration fluctuations are minimal, the segmental dynamics of isolated PI chains do n…
Abstract Poly(dimethyl)siloxanes of different viscosity have been synthesized by hydrolytic condensation of dimethyldichloro silane. Polysiloxane dispersed ferroelectric liquid crystal (PDFLC) composite films were prepared simultaneously by solvent induced and polymer induced phase separation techniques (SIPS and PIPS…