Fabrication, Assembly and Magnetic Properties of Nickel Hollow Nanoballs

Abstract

Nanoshells composed of close-packed nickel nanoparticles have been fabricated on sillca spheres via strong interaction between the metallic cations and ions of the support. The nickel hollow nanoballs can be self-assembled via magnetic field-assisted route, which is confirmed by the transmission electron microscopy. The magnetic properties of Ni nanoshells are discussed. It is expected that the prepared method can be extended to the synthesis of other hollow metal spheres.

Yolk‐like Micro/Nanoparticles with Superparamagnetic Iron Oxide Cores and Hierarchical Nickel Silicate Shells

“…The saturated mass magnetization is estimated to be 12.9 emu g −1 . Therefore, based on the combined VSM and above TEM, XRD, EDS results, yolk‐like particles with hierarchical nickel silicate shell and movable superparamagnetic iron oxide cores, which can be easily separated from the reaction solution by applying a relatively low magnetic field,49 were successfully prepared.…”

Hollow Micro‐/Nanostructures: Synthesis and Applications

“…4 ) is formed due to the strong interactions between silica and nickel species. [50,51] After silica removal and reduction with H 2 at 450-500 8C, metallic Ni [50] or Ni-silica [51] [52,53] More recently, Xu and co-workers have reported synthesis of uniform hollow nanospheres of NiO, a-Fe 2 O 3 , ZnO, CuO and Ga 2 O 3 using carbonaceous polysaccharide nanospheres as hard templates by controlled precipitation followed by calcination. [54] The key to this controlled precipitation route appears to involve preferred heterogeneous precipitation on the template surface induced by slow release of hydroxyl anions from thermal decomposition of urea.…”

Reaction of the Si8O20(SnMe3)8 Building Block with Silyl Chlorides: A New Synthetic Methodology for Preparing Nanostructured Building Block Solids

“…The notion of nanostructuring in solid-state chemistry and materials science refers to different aspects or properties of a material depending on the context or intended application. Nanometer sized balls, − dots, − tubes, − and wires − are examples of discrete objects that exhibit different forms of nanostructuring. Zeolites, templated sol-gels, and porous carbons are other examples of materials that exhibit nanostructuring based on their porosity. − These materials are currently of great interest because of their applicability in the areas of separations and solid-state science and as catalyst supports. ,,,− …”