: I 8653 (OTTO) Iron(II) acetate, ≥99.99% Cas 3094-87-9 - used to synthesize iron oxide nanoparticles which was further used to form iron oxide-poly(ethylene glycol) core-shell nanoparticles (NPs). The core-shell NPs were studied for self-assembly at liquid–liquid interfaces (SALI) forming monolayers.