Tailoring magnetic and hyperthermia properties of biphase iron oxide nanocubes through post-annealing

• DOI: 10.48550/arxiv.2401.18009
• Publication Date: 2024-01-31
• Authors: Supun B. Attanayake; Amit Chanda; Raja Das; Manh‐Huong Phan; H. Srikanth
• Keywords: Magnetic hyperthermia

Tailoring the magnetic properties of iron oxide nanosystems is essential to expand their biomedical applications. In this study, 34 nm nanocubes with two phases consisting Fe3O4 and alpha-Fe2O3 were annealed for 2 hours in presence O2, N2, He, Ar tune respective phase volume fractions control properties. X-ray diffraction measurements carried out post-treatment evaluate changes treated samples compared as-prepared, which showed an enhancement while others indicated enhancement. Furthermore, latter enhancements crystallinity saturation magnetization coercivity was most significant resulting highest specific absorption rates (up 1000 W/g) all applied fields 800, 600, 400 Oe agar during hyperthermia measurements. The general rate post-annealing underscores importance annealing atmosphere structural nanostructures.