Materials Literature
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The dimeric form of the single-molecule magnet $[{\mathrm{Mn}}_{4}{\mathrm{O}}_{3}{\mathrm{Cl}}_{4}({\mathrm{O}}_{2}\mathrm{CEt}{)}_{3}(\mathrm{py}{)}_{3}{]}_{2}$ recently revealed interesting phenomena: no quantum tunneling at zero field and tunneling before magnetic-field reversal. This is attributed to substantial…
We propose a framework to model elastic properties of polycrystals by coupling crystal orientational degrees of freedom with elastic strains. Our model encodes crystal symmetries and takes into account explicitly the strain compatibility induced long-range interaction between grains. The coupling of crystal orientatio…
A comprehensive dissolution rate theory that integrates individual surface reactions into an overall rate is developed. The dissolution theory is based on the movement of dissolution stepwaves stemming from surface defects. The net bulk rate associated with dissolution stepwaves arises quite naturally from the equatio…
We investigate strained heteroepitaxial crystal growth in the framework of a simplifying (1+1)-dimensional model by use of off-lattice Kinetic Monte Carlo simulations. Our modified Lennard-Jones system displays the so-called Stranski-Krastanov growth mode: initial pseudomorphic growth ends by the sudden appearance of…
Using an empirical bond-order potential, molecular dynamics (MD) simulations, and lattice dynamics calculations, we study the thermal expansion of diamond, graphite and single-walled carbon nanotubes. MD simulations demonstrate that, while the C-C bond length increases at a similar rate with increasing temperature in…
We demonstrate the ultrafast photoinduced Mott transition from a charge transfer insulator to a metal in a halogen-bridged Ni-chain compound by pump-probe reflection spectroscopy. Upon the irradiation of a 130-femtosecond laser pulse, the spectral weight of the gap transition is transferred to the inner-gap region. Wh…
Foreword.List of Contributors.1. Structure and Properties of Titanium and Titanium Alloys (M. Peters, et al.).2. Beta Titanium Alloys (G. Terlinde and G. Fischer).3. Orthorhombic Titanium Aluminides: Intermetallic with Improved Damage Tolerance (J. Kumpfert and C. Leyens).4. gamma-Titanium Aluminide Alloys: Alloy Desi…
The electrochemical properties of a new Co(II) deuteroporphyrin substituted by two electropolymerizable pyrrole groups has been investigated in organic solvent. This functionalization has allowed the preparation of the first example of a cobalt deuteroporphyrin film by oxidative electropolymerization. The resulting co…
We show that newly found BF3-doped polyaniline, though highly conducting, remains amorphous. Magnetic studies reveal many unusual properties, while suggesting that the intrinsic conductivity of this system is significantly larger than all other known forms of conducting polyaniline, establishing it as an interesting c…
We present an exact calculation of the single-electron energies and wave-functions for any bound state in a realistic Si-SiO2 spherical quantum dot, including the material dependence of the electron effective mass. The influence of dot radius, confinement barrier potential and barrier-to-dot electron mass ratio on the…
The thermal 1,3-dipolar polycycloaddition of N,N ‘-dimethyl- p -phenylenedinitrone ( 3 ) and 4,4‘-hexanediyldioxydi( N -methyl- p -phenylenenitrone) ( 10 ) with N,N ‘-(1,4-phenylene)dimaleimide and 1,6-hexanediylbis(carbamic acid) bis( N -methyl- p -phenylenenitrone) ester ( 12 ) with 1,6-hexanediylbis(carbamic acid)…
GdCrSb 3 is an intermetallic compound with a structure containing alternating layers of Gd and Cr atoms. It undergoes long-range magnetic ordering at 92 K, as revealed by dc and ac magnetic susceptibility measurements, concomitant with a transition in the single-crystal electrical resistivity. These results imply more…
The dodecametallic Cr(III) cluster [Cr(12)O(9)(OH)(3)(O(2)CCMe(3))(15)] has a ground spin state of S = 6 characterized by the spin Hamiltonian parameters g(ZZ)() = 1.965, g(XX)() = g(YY)() = 1.960, D(S=)()(6) = +0.088 cm(-)(1), and E(S=)()(6) = 0 (where D and E are the axial and rhombic zero-field splitting parameters…
Systemic syntheses showed that the lead titanate pyrochlore phases formed under hydrothermal reactions in a certain range of KOH concentrations. The obtained pyrochlore phases all crystallize in the cubic structure. In comparison with typical pyrochlore structure, the O‘ site in Pb 2 Ti 2 O 6 O‘ is vacant. In addition…
The effects of cation symmetry and packing on the mixed-valence state of binuclear ferrocene derivatives are discussed separately by using chiral isomers and racemic modification of 1',1' "-bis(2-phenylbutyl)-1,1' '-biferrocenium pentaiodide. The pentaiodide anion has a polymeric structure and is composed of triiodide…
The first copper bis(selenosemicarbazone) complexes have been synthesized, using the ligands glyoxal bis(selenosemicarbazone), pyruvaldehyde bis(selenosemicarbazone), and 2,3-butanedione bis(selenosemicarbazone). Their spectroscopic properties indicate that they are structurally analogous to their well-known square-pl…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTMultilayer Formation Using Oppositely Charged Gold- and Silver-Dendrimer NanocompositesKunio Esumi, Shintaro Akiyama, and Tomokazu YoshimuraView Author Information Department of Applied Chemistry and Institute of Colloid and Interface Science, Tokyo University of Science, Kagur…
Recently, a considerable amount of research has centered on the synthesis of nanostructured hydrogels via the polymerization of monomers in lyotropic liquid crystal (LLC) phases. Because of the potential for controllable nanostructures, these materials have exhibited tremendous potential for a variety of applications.…
Copolymers of trimethoxysilylpropyl methacrylate (TMSPM) and methyl methacrylate (MMA) with varied composition and molecular weight were prepared as building blocks for transparent organic−inorganic hybrid materials. Thermally and chemically induced condensation of these network precursors after solvent evaporation re…
A photoresponsive coumarin derivative was grafted on the pore outlet of Si−MCM-41. Irradiation of UV light longer than 310-nm wavelength to this coumarin-modified MCM-41 induced the photodimerization of coumarin to close the pore outlet with cyclobutane dimer. Guest molecules such as phenanthrene neither can enter nor…