Mandel, Karl-SebastianKarl-SebastianMandelStraßer, MarionMarionStraßerGranath, T.T.GranathDembski, S.S.DembskiSextl, GerhardGerhardSextl2022-03-042022-03-042015https://publica.fraunhofer.de/handle/publica/23927710.1039/C4CC09277EA 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.enNanopartikelSuperparamagnetismusEisenoxideFerrofluidphysiologisches VerhaltenWerkstoffe540journal article