Monolayer Exchange Chemistry of γ-Fe2O3 Nanoparticles
Chemistry of Materials2002Vol. 14(6), pp. 2628–2636
Citations Over TimeTop 10% of 2002 papers
Abstract
Monolayer modification of alkylamine-protected γ-Fe2O3 nanoparticles using functionalized alcohols and diols is presented. the stability of the modified nanoparticles was found to be dependent on the nature of the introduced alcohol: both bidentate surface−ligand bonding and steric blocking by bulky tail groups were necessary to produce systems resistant to agglomeration. EPR, UV−vis, and powder XRD analyses of the pre- and post-modified nanoparticles demonstrated that the core γ-Fe2O3 functionality was unaffected by the change in monolayer composition. Finally, multiple ligands could be readily incorporated into the monolayer using a simultaneous displacement reaction.
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