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Nucleation-Suppressed Phase Stabilization in Fe-Au Nanoparticles

TitleNucleation-Suppressed Phase Stabilization in Fe-Au Nanoparticles
Publication TypeJournal Article
Year of Publication2013
AuthorsMukherjee, P, Jiang, XJ, Wu, YQ, Kramer, MJ, Shield, JE
JournalJournal of Physical Chemistry C
Date Published11
Type of ArticleArticle
ISBN Number1932-7447
Accession NumberWOS:000327110500070
Keywordsclusters, dependence, nanoalloys, nanoclusters, nanocrystalline alloys, nanostructures, size, solubility, stability, transmission electron-microscope

20 nm) with composition Fe-35 at. % Au. The suppression of the phase transformation/precipitation in small particles is explained thermodynamically, as the free energy decrease associated with the phase transformation does not exceed the increase in energy due to the introduction of an interphase interface (grain boundary) within the cluster. A general equation has been derived to predict the critical cluster size below which transformations are inhibited, which agrees well with the observed experimental results.

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Structures and Dynamics