Effect of coating on g-Fe2O3 nanoparticles studies using XAS

P. DE LA PRESA; T. RUEDA; E. J. LEDE; S. J. STEWART

Workshop; Reunión Anual Usuarios RAU; 2016

CNPEM

During the last years there has been an exponential growth in studies devoted to optimize the heating efficiency of magnetic nanoparticles (MNPs) under alternating magnetic fields for tumor hyperthermia applications. To this aim, one of the challenges is to find biocompatible MNPs having a high specific absorption rate, which can be synthesized in large amounts using simple, cheap and reproducible methods. In addition, the surface coating of iron oxide MNPs is also a matter of study due to its influence on the stability of MNPs.We present here the results of an investigation on iron oxide (maghemite) nanoparticles of 6, 10 y 12 nm sizes with and without organic coating (DMS and APS) through TEM, FTIR, TGA, DTA , XAS and magnetometry.