Palmitic acid-coated magnetite nanocubes with high-quality crystallinity and bulk-like magnetic features

JUAN MANUEL ROZCO HENAO; DIEGO MURACA; FRANCISCO H. SÁNCHEZ; PEDRO MENDOZA ZELIS

JOURNAL OF PHYSICS - D (APPLIED PHYSICS)

IOP PUBLISHING LTD

Lugar: Londres; Año: 2020 vol. 53 p. 1 - 1

0022-3727

We have demonstrated the synthesis of high-quality monocrystalline magnetitenanocubes through the introduction of palmitic acid as surfactant in a thermaldecomposition synthesis of an organic F e precursor. Unlike the standard thermal decomposition synthesis route, we report the avoid of the reducing agentand a modification in the synthesis heating ramp. Structural and magneticproperties were investigated showing well defined cubic shaped nanoparticleswith a ∼ 40 nm edge and magnetic features close to bulk magnetite. We associate the bulk-like magnetic performance and properties to the highly crystallinestructure of the nanocubes.In addition, we introduce a facile way to make a ligand exchange of nanocubesinitial surfactant to citric acid in order to obtain biocompatible hydrophilicnanocubes. The potential application of the obtained sample in magnetic hyperthermia therapy is shown through calorimetric heating measurements onliquid dispersions of the nanocubes. We compute the Specific Absorption Rateto quantify the heating efficiency of the nanocubes