Materials Literature
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We report here the synthesis of single-phase bulk samples of CoO 2, the x = 0 end member of the A x CoO 2 systems (A = Li, Na), from a pristine LiCoO 2 sample using an electrochemical technique to completely de-intercalate lithium. Thus, synthesized CoO 2 samples were found to be oxygen-stoichiometric and possess a cr…
PURPOSE: To retrospectively compare the frequency of administration and cumulative dose of gadolinium-based contrast agent in dialysis-dependent patients who did and those who did not develop nephrogenic systemic fibrosis. MATERIALS AND METHODS: The ethics committees granted exempt status for this study and also waive…
A complete, isostructural series of complexes with La-Lu (except Pm) with the ligand TREN-1,2-HOIQO has been synthesized and structurally characterized by means of single-crystal X-ray analysis. All complexes are 1D-polymeric species in the solid state, with the lanthanide being in an eight-coordinate, distorted trigo…
The effect of molecular weight (MW) on the polymorphous crystallization and melting behavior of poly( l -lactide) (PLLA) were systemically studied by differential scanning calorimetry (DSC), polarized optical microscopy (POM), wide-angle X-ray diffraction (WAXD), and time-resolved Fourier transform infrared (FTIR) spe…
A monoclinic lysozyme crystal grown in NaCl solution was transformed into a new monoclinic crystal form by controlled dehydration. This crystal-to-crystal phase transition was accompanied by 20-40% solvent loss and the transformed crystal diffracted to prominently high resolution. The structures of the native and tran…
Abstract The effects of three major molecular parameters of poly(vinyl alcohol)—the number‐average degree of polymerization, degree of saponification, and syndiotactic dyad content—on the characteristics of poly(vinyl alcohol) films were investigated. Various poly(vinyl alcohol) films were prepared by a casting method…
Similarly to atomic positions in a crystal being fixed, or at least constrained by the space group of that crystal, the displacements of atoms in a domain wall are determined or constrained by the symmetry of the wall given by the sectional layer group of the corresponding domain pair. The sectional layer group can be…
Three ternary dysprosium complexes [Dy(2-ClBA)3 · phen]2 (1), [Dy(2-ClBA)3 · 2,2′-bipy]2 (2), and [Dy(2-BrBA)3 · phen]2 (3) (where 2-ClBAH = 2-ClC6H4COOH, 2-BrBAH = 2-BrC6H4COOH, phen = 1,10-phenanthroline, and 2,2′-bipy = 2,2′-bipyridine) have been synthesized and characterized by X-ray single crystal diffraction. Co…
Metal oxides possess multiple functional properties, such as acid-base, redox, electron transfer and transport, chemisorption by σ and π-bonding of hydrocarbons, O-insertion and H-abstract, etc. which make them very suitable in heterogeneous catalysis, particularly in allowing multistep transformati...
Blanket films of ultralow dielectric constant (ULK) materials and 193nm photoresist films have been processed downstream from hydrogen and deuterium-based discharges produced using an inductively coupled plasma reactor. Photoresist ashing rates and ULK modifications have been determined as a function of process parame…
Abstract Diamond is considered as tissue equivalent, due to its low atomic number, which makes it a particular attractive material for medical radiation dosimetry applications. X‐ray dosimeters made of natural single crystal diamonds are commercially available and routinely used, with typical gain values of about 0.5.…
The tuning of electron affinity and secondary electron emission on diamond (100) surfaces due to cycloaddition with 1,3-butadiene is investigated by photoemission experiments and density functional theory (DFT) calculations. A significant reduction in electron affinity up to 0.7 eV and enhancement of secondary electro…
A detailed comparison of the surface sensitivity of x-ray photoemission spectroscopy for hard and soft x rays is presented and discussed. Electron scattering parameters and their energy dependence are given for Si and two Si spectra are analyzed: a $\mathrm{Mg}\phantom{\rule{0.2em}{0ex}}K\ensuremath{\alpha}$ $(h\ensur…
Abstract A novel acid‐cleavable diacrylate crosslinker, DCDA, was used as a difunctional Michael acceptor in the synthesis of acid‐cleavable crosslinked networks via base‐catalyzed Michael addition of telechelic poly(ethylene glycol) bis(acetoacetate). Michael addition networks containing DCDA were degraded in the pre…
Abstract An assay method has been developed to detect oxalic acid from other structurally similar dicarboxylic acids using a cationic polythiophene derivative (PFT). Upon adding oxalic acid, the PFT can be cross‐linked through the bifunctional diacids of oxalic acid to form tense interpolymer π ‐stacking aggregation,…
Computational Nano-materials Design for Colossal Thermoelectric-cooling Power by Adiabatic Spin-Entropy Expansion in Nano-superstructures, Katayama-Yoshida, Hiroshi, Fukushima, Tetsuya, Dinh, Van An, Sato, Kazunori
Employing resonant x-ray diffraction, we observed unique pitch evolutions in the smectic-C*(alpha) phase in mixtures of two antiferroelectric liquid crystals. Our results show that the pitch in this phase continuously evolves across 4 layers, contradicting a theoretical model that predicts that the smectic-C*(FI2) pha…
A unique class of nanoclays was prepared by modification of pristine clays or organoclays (Cloisite C20A) with transition metal ions (TMIs). The composition, structure, morphology and thermal properties of TMI-modified nanoclays were investigated by atomic absorption spectroscopy (AAS), elemental analysis (EA), scanni…
Abstract Using a new aromatic 1,2,4‐triazole branching monomer (4.8–13.3 mol %), three hyperbranched polyfluorenes ( P2 – P4 ) were synthesized by the Suzuki coupling reaction to investigate the structural effect on optoelectronic properties. Poly(9,9‐dihexylfluorene) ( P1 ) was also prepared for comparative investiga…
We conclusively establish a direct link between formation of an Er-related donor gap state and the 1.5 microm emission of Er in Si. The experiment is performed on Si/Si:Er nanolayers where a single type of Er optical center dominates. We show that the Er emission can be resonantly induced by direct pumping into the bo…