Materials Literature
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Resonant x-ray scattering (RXS) at the Mn $K$ edge has been used to characterize the low temperature ordered phase of ${\mathrm{Bi}}_{0.5}{\mathrm{Sr}}_{0.5}\mathrm{Mn}{\mathrm{O}}_{3}$. Strong resonances were observed for the (030), (050), $(05∕20)$, $(0\phantom{\rule{0.3em}{0ex}}7∕2\phantom{\rule{0.3em}{0ex}}0)$, $(…
Reversible coloration−decoloration of tungsten phosphate glasses was observed by heat treatments at temperatures between 300 and 500 °C which were far below the T g (570 °C) under the ambient with controlled partial pressure of hydrogen and/or water. The color center responsible for the coloration was found to be an e…
A novel aqueous two-phase system, which exhibits a reversible photoinduced phase separation, has been developed with photochromic dextran synthesized by substituting 0.3 mol % of the hydroxyl groups with the photochromic chromophore, 6-nitrospiropyran (NSp). For an aqueous solution containing this photochromic dextran…
The design of metallic crystals consisting of single-component molecules ( single-component molecular metal ) is explained on the basis of the examinations of frontier molecular orbitals and the simple extended-Hückel tight-binding band pictures. To meet the conditions required to realize automatic carrier generation…
High-pressure studies on organic conductors and superconductors are reviewed. It is stressed that almost all the organic conductors are studied by means of high pressures, but the role or meaning of pressure effect has been dependent on the salts and physics of interests. In organic molecular crystals, many intriguing…
Localization effects in a metallic carbon nanotube are studied as a function of Aharonov–Bohm magnetic flux. The conductance exhibits the behavior of strong localization except in the absence of a flux. When the Fermi level lies in higher bands, the localization effect becomes smaller at a half flux quantum due to the…
Chiral hydrogen-bonded polymer films that respond to the presence of some amino acids (arginine, lysine, histidine) in water by changing the color and shifting the wavelengths of the selective reflection band (SRB) were synthesized and studied. The kinetics of the film's response depends on the concentration of donor/…
Present status of research activities in conducting molecular solids is briefly reviewed. It is impressive to note that a systematic physical understanding of electronic properties is now possible in spite of apparently complicated crystal structures. This is due to the robustness of the molecular orbitals. The succes…
We investigated the formation of self-assembled two-dimensional (2-D) arrays of dendrimer-encapsulated platinum nanoparticles (Pt-DENs) using prokaryotic surface-layer (S-layer) proteins as biomacromolecular templates. The Pt-DENs (mean core diameter 1.8 +/- 0.5 nm) were synthesized by chemical reduction of metal ion…
Potassium (K) fixation and release in soil are important issues in long‐term sustainability of a cropping system. Fixation and release behavior of potassium were studied in the surface and subsurface horizons in five benchmark soil series, viz. Dhar, Gurdaspur, Naura, Ladowal, and Nabha, under rice–wheat cropping syst…
Three recently reported aliphatic polyester dendrimers of generations 3, 4, and 5, having 4, 8, and 16 carborane cages within their interior, respectively, were found to exhibit thermally induced, reversible precipitation in aqueous solution. The cloud-point temperatures for these molecules were observed to be between…
For conventional superconductors, superconductivity is destabilized by magnetic field. However, in BETS-based two dimensional organic conductors, where BETS is bis(ethylenedithio)tetraselenafulvalene, superconductivity is induced by high magnetic fields parallel to the conducting layers. The overall features of the fi…
The structure of N,N-dimethylethylenediammonium pentachloroantimonate(III), [(CH3)2NH(CH2)2NH3][SbCl5], NNDP, was investigated at 100 and 15 K at ambient pressure, as well as at pressures up to 4.00 GPa at room temperature in the diamond-anvil cell. The stable structure at low temperatures and low pressures consists o…
A survey of crystallization conditions was carried out for 650 published protein-protein complexes in the Protein Data Bank (PDB) of the Research Collaboratory for Structural Bioinformatics (RCSB). This resulted in the establishment of a Protein Complex Crystallization Database (PCCD) and a set of configuration-space…
Liquid-phase catalytic oxidation of p -xylene to terephthalic acid was performed at 150−210 °C over Co−Mn−Br catalyst system. There was an interesting synergistic effect of cobalt and manganese catalyst. In the previous papers ( Ind. Eng. Chem. Res. 2005, 44, 261−266; 4518−4522; 7756−7760), a lumped kinetic scheme and…
DOTA-based complexes of gadolinium (Gd) bearing a thiol moiety on a propyl or hexyl arm were synthesized. It was hypothesized that these complexes would form reversible covalent linkages with human serum albumin (HSA), which contains a reactive thiol at cysteine-34. The binding constant of the hexyl complex to HSA was…
The in vivo fate of nanoparticles developed as drug delivery systems is influenced by the surface characteristics of the colloidal particles. In the present work, surface characteristics of a series of poly(isobutylcyanoacrylate) nanoparticles prepared by redox radical emulsion polymerization with polysaccharides of d…
We report the structural characterization and transport properties of highly-ordered epitaxial γ-Fe 2 O 3 thin films grown by a pure ozone-assisted molecular beam epitaxy method. X ray diffraction (XRD) measurements at a synchrotron facility indicated that the composition of films was close to that of γ-Fe 2 O 3 with…
Carbon nanosheets are a unique nanostructure that, at their thinnest configuration, approach a single freestanding graphene sheet. Temperature desorption spectroscopy (TDS) has shown that the hydrogen adsorption and incorporation during growth of the nanosheets by radio frequency plasma-enhanced chemical vapor deposit…
A review is given on theoretical studies concerning the pairing symmetry in organic superconductors. In particular, we focus on (TMTSF)$_2$X and $\kappa$-(BEDT-TTF)$_2$X, in which the pairing symmetry has been extensively studied both experimentally and theoretically. Possibilities of various pairing symmetry candidat…