Fig. 6. TEM micrographs showing some transversal cuts of pure cellulose beads (SCB) in (a) and (b); the composite magnetic material SCB-C25 is shown in the micrographs
(c)–(e) taken at different magnifications. The Selected Area Electron Diffraction pattern taken on the aggregate of nanoparticles in (e) is shown in (f), is indexed as a pure
magnetite Fe3O4 phase