Materials Literature
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We report here a simple and low-temperature method to induce the patterning of monolayers of semiconductor nanocrystals with dual color emission. We have used the patterned self-assembled monolayers (SAMs) of alkanethiolates on gold as a template to assemble two specific size CdSe nanocrystals into regular two-dimensi…
Catalytic dendrophanes 9 and 10 were prepared as functional mimics of the thiamine-diphosphate-dependent enzyme pyruvate oxidase, and studied as catalysts in the oxidation of naphthalene-2-carbaldehyde (4) to methyl naphthalene-2-carboxylate (8) (Scheme 1). They are composed of a thiazolio-cyclophane initiator core wi…
The structure of silk fibroin fiber from a wild silkworm, Samia cynthia ricini, whose amino acid sequence is similar to the spider (major ampullate) silk, was determined with solid-state NMR. The 15 N and 13 C labelings for the dominant amino acids, alanine and glycine, residues of S.c.ricini silk fibers, were perform…
Amorphous, atactic polypropylene structures, consisting of 125, 729, and 2197 monomer repeat units folded into periodic cells, were generated to study the effects of simulation size on the transport of small molecules in simulations of amorphous polymers. The diffusion coefficients and solubilities of three particles…
To characterize the possible magnetic structures created on magnetic multilayers a model has been formulated and studied. The interlayer inhomogeneous structures found indicate either (i) a regular periodic, (ii) a quasiperiodic change in the magnetization or (iii) spatially chaotic glass states. The magnetic structur…
The valence level photoemission spectra in the Anderson impurity model for Ce compounds at zero temperature are studied as a function of the photon energy $ω$. Most of former studies on Ce compounds are based on the sudden approximation, which is valid in high energy region. For the photoemission in the adiabatic limi…
This paper first describes the effect of neutron irradiation on the thermomechanical behavior of stress-relieved Zircaloy-4 fuel tubes that have been analyzed after exposure to five different fluences ranging from nonirradiated material to high burnup. In the second part, a viscoplastic model is proposed to simulate,…
The dipolar-random field Ising model (DRFIM) recently introduced displays a behaviour that can be connected to the magnetization of bidimensional magnetic media. Epitaxial magnetic garnet films seem to be the ideal test material for such a model. In this work the results of the measurements performed on garnet samples…
The electrical conductivity of the M2(WO4)3(MRare EarthInAl)solid electrolyte series amounts to32 10 6-6510-5 1cm-l with corresponding activation energies of441-91O kJmoL These electrical properties canbe individually improvedas is exemplary shownforthe case of Sc2(WO4)3and Al2(WO4)3bythe formation of mixed cationic t…
The femtosecond second hyperpolarizability due to the nonresonant electronic polarization for two intramolecular charge-transfer molecules, 6-propionyl-2-dimethylamino naphthalene and 2-anilinonaphthalene-6-sulfonic acid which possess the great permanent dipole-moment difference between the excited state and the groun…
Boron nitride films with different cubic phase contents were deposited in a radio frequency bias sputtering system by a two-stage deposition process. The Fourier transform infrared spectra and UV-visible transmittance and reflection spectra were measured. The optical absorption edge of BN films consists of a low energ…
The effect of various stacking sequences of sol–gel-prepared Pb(Zr, Ti)O3/PbZrO3 (PZT/PZ) multilayered thin films on the electric fatigue properties was investigated. The antiferroelectric layer between the Pt electrode and the ferroelectric layers acted as a barrier to fatigue. The initial P*r-P∧r (about 5 μC/cm2) of…
The proton nuclear spin-lattice relaxation rate ${1/T}_{1}$ has been measured as a function of temperature and magnetic field (up to 15 T) in the molecular magnetic ring ${\mathrm{Fe}}_{10}({\mathrm{OCH}}_{3}{)}_{20}({\mathrm{O}}_{2}{\mathrm{CCH}}_{2}\mathrm{Cl}{)}_{10}$ (Fe10). Striking enhancement of ${1/T}_{1}$ is…
Graft copolymerization of poly(aniline) and poly(o-toluidine) onto poly(ethylene terephthalate) fiber was conducted by using peroxydisulfate as a lone initiator under nitrogen atmosphere at various experimental conditions in aqueous hydrochloric acid medium. The grafting of poly(aniline) and poly(o-toluidine) onto pol…
Multilayers consisting of the perovskite metallic oxides, ferromagnetic La2/3Ba1/3MnO3 (LBMO) and paramagnetic LaNiO3 (LNO) have been grown by ozone-assisted molecular beam epitaxy. Structural characterization using in situ reflection high-energy electron diffraction and high-resolution x-ray diffraction reveal a very…
We apply first-principles calculations to study the structural and electronic properties of a boron nitride fullerene-like cluster, B36N36. This cluster has shape and dimensions comparable to those of a single-shelled BN fullerene recently produced in an electron-beam irradiation experiment. The calculations show that…
The experiments were carried out in excess ethylene glycol (EG) and poly(ethylene terephthalate) (PET) oligomer in the presence of zinc acetate as catalyst at 190°C. It was found that during the glycolysis reaction, the monomer and dimer were contained in the liquid phase. After 2 h of the glycolysis reaction, an equi…
Acquiring a pumped storage power generation site utilizing river water recently faces several restrictions due to environmental assessment. On the other hand, there are many sites favorable for constructing a pumped storage power plant utilizing seawater in Japan, which is surrounded by the sea. Seawater pumped storag…
We report investigations of the electronic transport properties carried out by means of the Hall technique for indium–tin–oxide thin films on glass after a variety of surface treatments. We find that oxygen-plasma treatments induce a significant increase in the carrier concentration, and a less significant decrease of…
The effect of a short (10-30 min) thermobaric action (in the 1-5 GPa pressure and 700-1300$^\circ$C temperature range) on the structure, superconductive and mechanical properties of melt-textured-MBa$_2$Cu$_3$O$_{7-δ}$ (M=Y, Nd) or MT-MBCO have been studied. The existence has been established of pressure-temperature--…