title: [Transmission electron microscopy in the structural study of superparamagnetic contrast agents for MRI].
abstract: Iron oxide nanoparticles with different crystal sizes and uniform dextran coating were synthesized and analyzed by T.E.M.. The iron oxide core dimension and homogeneity of the preparation were correlated to magnetic properties. The increasing Fe/Dextran ratio used for the synthesis was well correlated with the mean diameter and the magnetic susceptibility. The comparison of the crystal size with the particle size determined by nanosizer in solution suggest that particles consist in nanoaggregates of many crystal subunits.
authors.affiliation: Laboratoire de Biophysique, Faculté de Médecine, Angers.
authors.forename: I
authors.initials: I
authors.lastname: Lucet
authors.forename: R
authors.initials: R
authors.lastname: Filmon
authors.forename: D
authors.initials: D
authors.lastname: Pouliquen
authors.forename: J J
authors.initials: JJ
authors.lastname: Le Jeune
authors.forename: P
authors.initials: P
authors.lastname: Jallet
mesh_terms: D003287:Contrast Media / Q000737:chemistry*; D003460:Crystallization; D003911:Dextrans / Q000737:chemistry; D005290:Ferric Compounds / Q000737:chemistry; D052203:Ferrosoferric Oxide; D007501:Iron / Q000737:chemistry; D008279:Magnetic Resonance Imaging; D008280:Magnetics; D008854:Microscopy, Electron; D010087:Oxides / Q000737:chemistry
chemical_list: D003287:Contrast Media; D003911:Dextrans; D005290:Ferric Compounds; D010087:Oxides; C000499:ferric oxide; D007501:Iron; D052203:Ferrosoferric Oxide