Cobalt Nanomaterials: Synthesis and Characterization

Abstract

The sections in this article are Introduction The Characterization of Co Nanoparticles Shape, Size, and Microstructure Transmission Electron Microscopy Scanning Electron Microscopy Magnetic Properties Morphology Elemental and Chemical Analysis Auger Electron Spectroscopy X ‐Ray Photoelectron Spectroscopy ( XPS ) Fourier Transform Infrared ( FTIR ) Spectroscopy The Crystal Structure: X ‐Ray Diffraction ( XRD ) Synthesis of Cobalt‐Based Nanoparticles Introduction Stabilization of Nanomaterials Synthesis of Cobalt Nanomaterials Physical Methods Chemical Vapor Deposition Liquid‐Phase Chemical Precipitation Summary and Outlook Magnetic Properties of Co Nanoparticles Introduction Finite Size Effects Size‐Dependent Crystalline Structure Size‐Dependent Magnetic Domain Structure and the Reversal of Co Nanoparticles Thermal‐Activation Effect on the Moment and Coercivity Superparamagnetism in Co Nanoparticle System and its Direct Investigation Surface Effects of Co Nanoparticles Moment Enhancement of Surface Atoms Anisotropy Enhancement of Co Nanoparticles Exchange Bias Between the Core and the Oxidized Surface in Co Nanoparticles Summary Summary and Outlook

Effect of gamma radiation on the structure and thermal properties of polyaniline-cobalt/polycarbonate nanocomposite

“…Cobalt nanocrystal got more consideration than Fe and Ni owing to its distinguished characteristics and oxidation-resistance. Cobalt NPs are used in several applications such as catalyst for the Fischer-Tropsch reaction, as coatings and for electroplating [7]. Further, cobalt has two crystal phases: hexagonal closepacked and face-centered cubic.…”