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

Author(s)

Orozco-Henao, J. M. ^[1] ; Muraca, D. ^[2] ; Sanchez, F. H. ^[1] ; Mendoza Zelis, P. ^[1]

Affiliation

^[1] Univ Nacl La Plata UNLP, Inst Fis La Plata IFLP CONICET, Dept Fis, Fac Ciencias Exactas, CC 67, RA-1900 La Plata - Argentina

^[2] Univ Estadual Campinas UNICAMP, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF PHYSICS D-APPLIED PHYSICS; v. 53, n. 38 SEP 16 2020.
• Web of Science Citations: 0

Abstract

We have demonstrated the synthesis of high-quality monocrystalline magnetite nanocubes through the introduction of palmitic acid as surfactant in a thermal decomposition synthesis of an organicFeprecursor. Unlike the standard thermal decomposition synthesis route, we report the avoid of the reducing agent and a modification in the synthesis heating ramp. Structural and magnetic properties were investigated showing well defined cubic shaped nanoparticles with a similar to 40 nm edge and magnetic features close to bulk magnetite. We associate the bulk-like magnetic performance and properties to the highly crystalline structure of the nanocubes. In addition, we introduce a facile way to make a ligand exchange of nanocubes initial surfactant to citric acid in order to obtain biocompatible hydrophilic nanocubes. The potential application of the obtained sample in magnetic hyperthermia therapy is shown through calorimetric heating measurements on liquid dispersions of the nanocubes. We compute the Specific Absorption Rate to quantify the heating efficiency of the nanocubes. (AU)

• FAPESP's process: 17/10581-1 - Emergent phenomena in reduced dimension systems
• Grantee: Pascoal Jose Giglio Pagliuso
• Support Opportunities: Special Projects