title: Surfactant free superparamagnetic iron oxide nanoparticles for stable ferrofluids in physiological solutions.
abstract: A process is reported to obtain a nanoparticle sol from co-precipitated iron oxide particles without using any surfactant. The sol - a true ferrofluid - is not only stable over a wide range of pH but also in physiological solutions. This is a decisive step towards biomedical applications where nanoparticle agglomeration could so far only be prevented by using unwanted surfactants.
authors.affiliation: Fraunhofer Institute for Silicate Research ISC, Neunerplatz 2, 97082 Wuerzburg, Germany. karl-sebastian.mandel@isc.fraunhofer.de.
authors.forename: K
authors.initials: K
authors.lastname: Mandel
authors.forename: M
authors.initials: M
authors.lastname: Straßer
authors.forename: T
authors.initials: T
authors.lastname: Granath
authors.forename: S
authors.initials: S
authors.lastname: Dembski
authors.forename: G
authors.initials: G
authors.lastname: Sextl
mesh_terms: D006863:Hydrogen-Ion Concentration; D060328:Magnetic Phenomena; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry; D012996:Solutions
chemical_list: D058185:Magnetite Nanoparticles; D012996:Solutions; D012822:Silicon Dioxide