Biologically active 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3-phosphocholine (DC_8,9PC) nanotube-forming phospholipids (PL) were utilized to synthesize highly ferromagnetic, concentric iron oxide–carbon–iron oxide nanotubes (FMNTs), using Fe²⁺/H₂O₂ redox reactions, followed by further exposure to 550 °C.