Magnetic domain interactions of Fe₃O₄ nanoparticles embedded in a SiO₂ matrix.

ABSTRACT: Currently, superparamagnetic functionalized systems of magnetite (Fe₃O₄) nanoparticles (NPs) are promising options for applications in hyperthermia therapy, drug delivery and diagnosis. Fe₃O₄ NPs below 20 nm have stable single domains (SSD), which can be oriented by magnetic field application. Dispersion of Fe₃O₄ NPs in silicon dioxide (SiO₂) matrix allows local SSD response with uniaxial anisotropy and orientation to easy axis, 90° <001> or 180° <111>. A successful, easy methodology to produce Fe₃O₄ NPs (6-17 nm) has been used with the Stöber modification. NPs were embedded in amorphous and biocompatible SiO₂ matrix by mechanical stirring in citrate and tetraethyl orthosilicate (T

SUBMITTER: Fuentes-Garcia JA 

PROVIDER: S-EPMC5865143 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature