Magnetic hyperthermia in brick-like Ag@Fe3O4 core-shell nano particles

Author(s)

Brollo, M. E. F. ^[1] ; Orozco-Henao, J. M. ^[1] ; Lopez-Ruiz, R. ^[1] ; Muraca, D. ^[1] ; Dias, C. S. B. ^{[1, 2]} ; Pirota, K. R. ^[1] ; Knobel, M. ^[1]

Affiliation

^[1] Univ Estadual Campinas UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil

^[2] Brazilian Ctr Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083970 Campinas, SP - Brazil

• Document type: Journal article
• Source: Journal of Magnetism and Magnetic Materials; v. 397, p. 20-27, JAN 1 2016.
• Web of Science Citations: 30

Abstract

Heating efficiency of multifunctional Ag@Fe3O4 brick-like nanoparticles under alternating magnetic field was investigated by means of specific absorption rate (SAR) measurements, and compared with equivalent measurements for plain magnetite and dimer heteroparticles. The samples were synthesized by thermal decomposition reactions and present narrow size polydispersity and high degree of crystallinity. The SAR values are analyzed using the superparamagnetic theory, in which the basic morphology, size and dispersion of sizes play key roles. The results suggest that these novel brick-like nanoparticles are good candidates for hyperthermia applications, displaying heating efficiencies comparable with the most efficient plain nanoparticles. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 11/01235-6 - Effects of dipolar interactions and surface in magnetic granular systems and magnetic nanoparticles on ferrogels
• Grantee: Diego Muraca
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/13275-8 - Finite-size effects, synthesis and magnetic properties of heterogeneous modelled nanowires
• Grantee: Román López Ruiz
• Support Opportunities: Scholarships in Brazil - Post-Doctoral