Synthesis of novel FeM (Co, Ni, Cu & Zn)/PDMS for magnetic actuators thin film fabrication by greener route

A novel PDMS-bimetallic magnetic nanoparticle thin films based magnetic actuators have been fabricated using an eco-friendly cost-effective facile method. The magnetic thin films have received greater attention for their variety of specialized applications, particularly in the medical field. Actuators find very broad applications in microfabrication, microelectronics, medicine, and lab-on-a-chip systems. The FeM(Co/Ni/Cu/Zn) bimetallic magnetic nanoparticles have been synthesized through greener Mimosa Pudica leaf extract. These synthesized nanoparticles are combined with PDMS polymer to form flexible thin films to fabricate magnetic actuators. Optical characterization of the FeM nanoparticles showed a broad plasmon absorption band around 1100–1600 nm, and their corresponding thin-film absorption band shifted negligibly. The magnetic investigations showed that the obtained nanoparticles and their thin films are ferromagnetic with a significant remanent magnetization. Particularly Fe-Cu magnetic NPs and their FeCu@PDMS film displayed 90.82, 55.79 emu/g Ms and 33.34, 11.68 emu/g Mr values at 300 K respectively. These results make the FeM@PDMS flexible films are promising for advanced magnetics memory devices and magnetic induced actuators fabrication.