title: Ultrasmall iron oxide nanoparticles for biomedical applications: improving the colloidal and magnetic properties.
abstract: A considerable increase in the saturation magnetization, M(s) (40%), and initial susceptibility of ultrasmall (<5 nm) iron oxide nanoparticles prepared by laser pyrolysis was obtained through an optimized acid treatment. Moreover, a significant enhancement in the colloidal properties, such as smaller aggregate sizes in aqueous media and increased surface charge densities, was found after this chemical protocol. The results are consistent with a reduction in nanoparticle surface disorder induced by a dissolution-recrystallization mechanism.
authors: Instituto de Ciencia de Materiales de Madrid (CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain.
authors: Rocio
authors: R
authors: Costo
authors: Valentina
authors: V
authors: Bello
authors: Caroline
authors: C
authors: Robic
authors: Marc
authors: M
authors: Port
authors: Jose F
authors: JF
authors: Marco
authors: M
authors: M
authors: Puerto Morales
authors: Sabino
authors: S
authors: Veintemillas-Verdaguer
mesh_terms: D003102:Colloids; D005290:Ferric Compounds / Q000737:chemistry*; D008280:Magnetics; D053768:Metal Nanoparticles; D046529:Microscopy, Electron, Transmission; D033362:Powder Diffraction; D014867:Water
chemical_list: D003102:Colloids; D005290:Ferric Compounds; D014867:Water; C000499:ferric oxide