Preparation of Functionalized Carbon‐Coated Cobalt Nanoparticles with Sulfonated Arene Derivatives, a Study on Surface Functionalization and Stability

Abstract

The functionalization of magnetic nanoparticles has been an importantf ield in the last decade due to the versatile applicationsi nc atalysis and biomedicine. Generally, ah igh degree of functionalities on the surfaceo ft he nanoparticles is desired. In this study,c ovalent functionalization of various aromatic sulfonic acids on carbon-coated cobalt nanoparticles are investigatedo ns urface functionalization yield and stability.T he nanoparticles are prepared via covalent linkageo fa ni ns itu generated diazonium on the graph-ene-like surface. Adsorption and wash experiments were performed to confirmacovalent bonding of the naphthalene derivatives on the nanoparticle surface. With an increased number of sulfonica cid groups on the aromatic compound as ignificantly lower loading is observed on the correspondingf unctionalized nanoparticles.T his can be counteracted by ac hange of nitrite species. With this method,n anoparticles with ah igh number of sulfonic acid groups can be produced.

Magnetic Graphitic Nanocapsules: Fabrication, Classification, and Theranostic Applications

“…Controlled radical polymerization allows polymer brushes to grow from the surface of particles and thereby separate the magnetic cores by steric hindrance . They also inserted an azide moiety and allowed click reaction of a relevant tag molecule, which is more helpful for the subsequent modification of biomacromolecules on the particle surface …”

“…38 They also inserted an azide moiety and allowed click reaction of a relevant tag molecule, which is more helpful for the subsequent modification of biomacromolecules on the particle surface. 64 ■ APPLICATION OF MGNs AS A THERANOSTIC PLATFORM MRI is a classic imaging technique that uses strong magnetic fields and radio waves to produce detailed images of the deep tissue without harm. In order to better highlight the region of interest (ROI), researchers have developed a series of contrast agents to enhance the signal.…”