Materials Literature
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Monodisperse emulsions can be obtained by shearing a crude polydisperse one. The aim of this paper is to discover the required conditions for droplet fragmentation and resulting monodispersity, independently of the chemical nature of the system. We particularly examine (i) the role of the initial emulsion viscoelastic…
Quasicrystals are assumed to be electronically stabilized by a Hume-Rothery type mechanism. This explains most of the peculiar properties of quasicrystals. The stabilization is investigated by electronic transport properties, as they depend sensitively on the stabilizing interaction between the static structure and th…
This paper deals with the analytic derivation of a complete equation of state (EOS) for solids from shock-wave data in the range of pressures and temperatures, attained by detonation of chemical explosives. The caloric, the thermal and the incomplete EOS are determined as well. An equation for the shock temperature al…
Three-dimensional ceramic nanostructured films were produced from silicon-containing triblock copolymer films exhibiting the double gyroid and inverse double gyroid morphologies (space group Ia3d). A one-step room-temperature oxidation process that used ozonolysis and ultraviolet irradiation effected both the selectiv…
In this article we compare the two plate theories in the sense of Kirchhoff–Love and Reissner–Mindlin for several different settings of the physical system. We establish existence, uniqueness and regularity of solutions to the respective boundary and initial boundary value problems. Moreover, we give asymptotic expans…
A planar CrO x /SiO 2 /Si (100) model for the Phillips ethylene polymerization catalyst, prepared by spin-coating impregnation from an aqueous solution of CrO 3, polymerizes ethylene in the gas phase at 160 °C with a significant and constant activity. After polymerization for 5 min and cooling to room temperature, an…
Rare kinks (1.74 × 10 -3 kinks nm -1 ) on the otherwise molecularly straight 001 growth steps on the (010) face of orthorhombic lysozyme were studied. These straight steps are generated at the edge between the (010) and (110) faces. Each step is assumed to propagate by creation of one-dimensional (1D) `nuclei' - the s…
Defects on thin epitaxial insulator films of NaCl(100), KCl(100), and MgO(100) generated during growth and by electron bombardment are investigated by high-resolution spot profile analysis in low-energy electron diffraction (SPALEED), photoelectron spectroscopy (XPS, UPS), electron energy-loss spectroscopy (EELS), and…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTNew Conversion Reaction of an Aurivillius Phase into the Protonated Form of the Layered Perovskite by the Selective Leaching of the Bismuth Oxide SheetWataru Sugimoto, Masashi Shirata, Yoshiyuki Sugahara, and Kazuyuki KurodaView Author Information Department of Applied…
We have made detailed comparison of the local and chain dynamics of a melt of 1,4-polybutadiene (PBD) as determined from experiment and molecular dynamics simulation at 353 K. The PBD was found to have a random microstructure consisting of 40% cis, 50% trans, and 10% 1,2-vinyl units with a number-average degree of pol…
A liquid-crystalline polymer of 6-[4-(4-ethylphenyl)diazenylphenyloxy]hexyl methacrylate and copolymer of the azobenzene monomer with 4‘-[6-(methacryloyloxy)hexyloxy]-4-cyanobiphenyl were cast as thin films. When the polymer films with cis -azobenzenes were subjected to irradiation with linearly polarized light at 436…
We used freeze trapping to stabilize the Michaelis complex of wild-type tryptophan synthase and the alpha-subunit substrate indole-3-glycerol phosphate (IGP) and determined its structure to 1. 8 A resolution. In addition, we determined the 1.4 A resolution structure of the complex with indole-3-propanole phosphate (IP…
A new experimental device is used to monitor in situ the swelling behavior of poly(dimethylsiloxane) melts in contact with supercritical carbon dioxide. The effects of pressure, temperature, and sample molecular weight on the kinetics and extent of swelling are examined using this experimental technique. The swelling…
Sonoluminescence (SL) spectra were collected from water doped with several organic liquids at low concentrations. Most of the organic substances studied show emission from C 2 and an overall decrease in the intensity relative to SL from pure water. This decrease is due to the consumption by the organic substrates of h…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTStereospecific Polymerization of 1,3-Butadiene with Samarocene-Based Catalysts 1Shojiro Kaita, Zhaomin Hou, and Yasuo WakatsukiView Author Information RIKEN (The Institute of Physical and Chemical Research), Hirosawa 2-1, Wako, Sait…
<italic>Sonochemistry</italic> starts off asking the questions: what is sonochemistry and why is it important? It has been recognised for many years that power ultrasound has great potential for uses in a wide variety of processes in the chemical and allied industries. Reported applications include cleaning, steriliza…
The results of fluorescence measurements of magnetic circular dichroism (MCD) in Mn L_2,L_3 X-ray emission and absorption for Heusler alloys NiMnSb and Co2MnSb are presented. Very intense resonance Mn L_3 emission is found at the Mn 2p_3/2 threshold and is attributed to a peculiarity of the threshold excitation in mat…
Mesoporous silica molecular sieve SBA-15 has been synthesized and incorporated with variable amounts of titanium via incipient-wetness impregnation with titanium isopropoxide in ethanol followed by calcination. Characterization by powder X-ray diffraction, nitrogen adsorption, X-ray photoelectron, Raman, and diffuse r…
This 1999 book covers all the most important areas of nanotube research, as well as discussing related structures such as carbon nanoparticles and 'inorganic fullerenes'. Carbon nanotubes are molecular-scale carbon fibres with structures related to those of the fullerenes. Since their discovery in 1991, they have capt…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTA Fast Thermally Curing Naphthyl−Ethynyl ImideMichael E. Wright and Derek A. SchorzmanView Author Information Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284-2006 Cite this: Macromolecules 1999, 3…