A Magnetic and Moessbauer Spectral Study of Core/Shell Structured Fe/Au Nanoparticles

Simple item page
dc.creatorCho, Sung-Jin
dc.creatorShahin, Ahmed M.
dc.creatorLong, Gary J.
dc.creatorDavies, Joseph E.
dc.creatorLiu, Kai
dc.creatorGrandjean, Fernande
dc.creatorKauzlarich, Susan M.
dc.date2005-12-16
dc.date.accessioned2026-07-07T06:53:27Z
dc.date.available2026-07-07T06:53:27Z
dc.descriptionFe/Au nanoparticles have been chemically synthesized through a reverse micelle reaction and investigated by both conventional and synchrotron based x-ray diffraction and by magnetic and Moessbauer spectral studies. The powder x-ray diffraction patterns reveal both the presence of crystalline alpha-iron and gold and the absence of any crystalline iron oxides or other crystalline products. First-order reversal curves, along with the major hysteresis loops of the Fe/Au nanoparticles have been measured as a function of time in order to investigate the evolution of their magnetic properties. The iron-57 Moessbauer spectra of both uncoated iron nanoparticles and the Fe/Au nanoparticles have been measured at 78 and 295 K and indicate that two major iron containing components are present, namely the expected alpha-iron and the unexpected amorphous Fe1-xBx alloy; several poorly crystallized ordered iron(III) oxide components as well as paramagnetic iron(II) and iron(III) components are also observed. These results indicate that the Fe-core/Au-shell nanoparticles synthesized through reverse micelles are far more complex that had been believed.
dc.description31 pages, 1 table, 8 figures, to appear in Chemistry of Materials
dc.identifierhttps://arxiv.org/abs/cond-mat/0512413
dc.identifierhttp://arxiv.org/abs/cond-mat/0512413
dc.identifierChem. Mater. 18, 960-967 (2006).
dc.identifierdoi:10.1021/cm0522073
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/105592
dc.subjectMaterials Science
dc.titleA Magnetic and Moessbauer Spectral Study of Core/Shell Structured Fe/Au Nanoparticles
dc.typetext

Files

Collections

arXiv