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TEM images of (a) Fe3O4-PAA, (b) Fe3O4-PAH, and (c) Fe3O4-PVA. (d) PXRD of the Fe3O4 powder standard with JCPDS Card No. of 75-1449, Fe3O4-PAA, Fe3+O4-PAH and Fe3O4-PVA. (e) Photographs of Fe3O4-PAA, Fe3O4-PAH and Fe3O4-PVA nanoparticles in aqueous suspension.
