Metallic glasses are perfect materials for preparing nanostructures by dealloying, but the obtained commonly of porous structures. Through combination chemical dealloying and ultrasonic vibration, ultrathin Cu&Ag bimetallic nanoporous membranes (NPMs) have been prepared from a Zr48Cu36Ag8Al8 MG ribbon. Furthermore, introducing oxygen into ribbon to change mechanism process, (Cu&Ag)@Ag core-shel...

The supersaturated solid-solution interfaces between Cu core and Ag shell structures improve their bonding strength greatly prevent the outward diffusion of atoms slow down growth oxides. printed CuAg x electrodes maintain high conductivity for a long time even at 220 °C, which is far better than conventional core/Ag Cu/Ag mixed that rapidly oxidize below 150 °C. These findings not only promote...

A DNA-free, proteinaceous procapsid of bacteriophage T7 (capsid I) has been shown in previous studies to consist of an external, spherical shell (envelope) and an internal, cylindrical core with fibrous projections that connect the core to the envelope. To determine the role of the core in assembly of the envelope of capsid I, the kinetics of appearance of capsid I and possible intermediates in...

The usefulness of Pt-based nanomaterials for catalysis can be greatly enhanced by coupling morphology engineering to the strategic presence of a second or even third metal. Here we demonstrate the design and preparation of stellated Ag-Pt bimetallic nanoparticles where significant activity difference between the methanol oxidation reaction (MOR) and the oxygen reduction reaction (ORR) may be re...

Extended chain polymers [Ag(5){S(2)P(OEt)(2)}(4)(PF(6))](n), (1) could be converted to clusters of the type, [Ag(8)(X){S(2)P(OEt)(2)}(6)](PF(6)) [X = F (2); Cl (3); H (4)], by the addition of appropriate anions, of which [Ag(8)(H){S(2)P(OEt)(2)}(6)](+) showed a unique tetracapped-tetrahedral Ag(8) core and contained Ag-mu-H-Ag linkages.

Without using any templates or surfactants, this study develops a high-yield process to prepare vertical Ag-Pt core-shell nanowires (NWs) by thermally assisted photoreduction of Ag NWs and successive galvanic replacement between Ag and Pt ions. The clean surface of Ag nanowires allows Pt ions to reduce and deposit on it and forms a compact sheath comprising Pt nanocrystals. The core-shell struc...

Abstract We investigated the size dependent local field enhancement factor (LFEF) of CdSe@Ag and CdSe@ZnSe@Ag core/shell spherical nanoparticles theoretically numerically within framework quasi-static approximation. From potential distributions in core, shell(s), host medium, using modified Drude-Sommerfeld model, we separately obtained expressions for LFEF core/spacer/shell nanocomposites. By ...

Pectin-Ag nanocomposites with a core-shell structure are synthesized by the “green chemistry” method based on reduction of silver nitrate pectin (amidated, low-, or high methoxylated) in an alkaline medium at room temperature. TEM and DLS measurements show that average size inorganic core (10–30 nm) hydrodynamic diameter nanocomposite (284.8–649.2 depend type pectin. The films pectin-Ag polyvin...

TWO DISTINCT VIRAL ANTIGENS ARE ASSOCIATED WITH THE HEPATITIS B VIRUS: the hepatitis B surface antigen (HB(s)Ag, Australia antigen) and the hepatitis B core antigen (HB(c)Ag). HB(s)Ag, purified from the serum of asymptomatic human HB(s)Ag carriers, and HB(c)Ag, purified from the liver of a chimpanzee acutely infected with hepatitis B virus, were examined by serological and immune electron micro...