Materials Literature
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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…
Synthesis and radical polyaddition behavior of N -methacryloyl- l -cysteine methyl ester (MA-C-M), N -4-pentenoyl- l -cysteine methyl ester (P-C-M), and N -4-vinylbenzoyl- l -cysteine methyl ester (V-C-M) were examined. Although MA-C-M afforded a cross-linked polymer and P-C-M did not polymerize at 60 °C, V-C-M polyme…
To critically compare with the fuzzy-cylinder-model theory for the dynamics of stiff-chain polymers in solution, zero-shear viscosities and mutual diffusion coefficients have been measured for dilute through concentrated isotropic solutions of poly( n -hexyl isocyanate) (PHIC) samples with the number N of Kuhn's stati…
The polyconjugated bithiophene−carbazole regular copolymer poly(3,6-bis(2-(3,4-ethylenedioxy)thienyl)- N -dodecylcarbazole), produced by anodic coupling of the relevant monomer in acetonitrile and characterized by cyclic voltammetry, FTIR reflection−absorption, and UV−vis spectroscopy, has been investigated with elect…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTCondensative Chain Polymerization in Solid−Liquid Phase. Synthesis of Polyesters with a Defined Molecular Weight and a Narrow Molecular Weight Distribution by PolycondensationTsutomu Yokozawa and Hideto SuzukiView Author Information Department of Applied Chemistry Kana…
The [Cu 4 OCl 6 (IMIDH) 4 ] complex has been synthesized and its crystal structure and magnetic properties determined. The compound crystallizes as a dark green solid in the orthorhombic system, space group P 2 1 2 1 2 1, with cell constants a = 11.469(2) Å, b = 13.933(2) Å, c = 16.778(3) Å and four formula units per…
The electrometallurgical processing of spent fuel developed at Argonne National Laboratory produces a cathode which contains dendrites of heavy metal (principally U), salts, and residual cadmium. The cathode requires further treatment which is accomplished by loading it into a cathode processor to first purify and the…
We describe a detailed synthesis of a silicified inorganic/organic nanoporous monolithic composite conforming to the lyotropic liquid crystalline L 3 phase. The pore dimensions of the silicified L 3 phase scale with the solvent volume fraction in the synthesis reaction mixture. Changing the solvent fraction in the ini…
PFA sheets were modified with remote hydrogen plasma, and effects of the modification on the adhesion between copper layer and FEP were investigated. Remote hydrogen plasma treatment for a short time of 30 s is able to make the PFA surface hydrophilic. The remote hydrogen plasma treatment causes defluorination and oxi…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis of Long Chain Branched Polypropylene with Relatively Well-Defined Molecular StructureBing Lu and T. C. ChungView Author Information Department of Materials Science and Engineering, The Pennsylvania State University, Univer…
The structures and phase transitions occurring during the compression of polystyrene−poly(ethylene oxide) (PS−PEO) diblock copolymer monolayers at the air−water interface have been studied by surface pressure isotherms, neutron reflectivity, and Brewster angle microscopy. At low coverage, the EO monomers adsorb at the…
The pronounced ability of fullerene C60 to act as an electron and energy acceptor has led to the synthesis of a large number of compounds in which C60 is covalently linked to photoactivatable groups which can serve as potential donors. Such compounds are of interest as model systems for photosynthetic reaction centers…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis of Syndiotactic Polystyrene (s-PS) Containing a Terminal Polar Group and Diblock Copolymers Containing s-PS and Polar PolymersGuangxue Xu and T. C. ChungView Author Information Department of Material Science and Engineerin…
Activated carbon fibers (ACFs) were oxidized using both aqueous and nonaqueous treatments. As much as 29 wt % oxygen can be incorporated onto the pore surface in the form of phenolic hydroxyl, quinone, and carboxylic acid groups. The effect of oxidation on the pore size, pore volume, and the pore surface chemistry was…
The moisture absorption in granulated materials used in foundry technologies is analyzed. The absorption process has a diffusive behavior mainly. A simple experimental technique, in which the wet weight increment was recorded as the experimental parameter and an analytic method with computing procedure to find the par…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTSingle-Site Catalysts for Ring-Opening Polymerization: Synthesis of Heterotactic Poly(lactic acid) from rac-LactideMing Cheng, Athula B. Attygalle, Emil B. Lobkovsky, and Geoffrey W. CoatesView Author Information Department of Chemistry and Chemical Biology Baker Labor…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTA New Nonhydrolytic Single-Precursor Approach to Surfactant-Capped Nanocrystals of Transition Metal OxidesJörg Rockenberger, Erik C. Scher, and A. Paul AlivisatosView Author Information Department of Chemistry, Box 101 University of California, Berkeley, Berkeley Calif…