Figure 3

TEM images of oxidized MWCNTs (a); amino-functionalized MWCNTs (b); amino-functionalized MWCNTs with several Fe₃O₄ nanoparticles (c); enlarged image of a MWCNTs with Fe₃O₄ nanoparticles in the inner cavity (d); magnetic MWCNTs modified with PAMAM dendrimers (e); XRD patterns for MWCNTs (f).