Dendritic Oxide Growth in Zerovalent Iron Nanofilms Revealed by Atom Probe Tomography

Mavis D. Boamah, Dieter Isheim, Franz M. Geiger*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Atom probe tomography (APT) analysis of chemically pure nanofilms of zerovalent iron (Fe(0), or ZVI) and their thermal oxide nano-overlayers reveals the presence of dendritic iron oxide features that extend from the oxide nano-overlayer surface into the ZVI bulk. The dendrites are observed by APT to be in the 5 nm × 10 nm size range and form quickly under natural atmospheric conditions. Their growth into the ZVI layer is, within the limit of our three month long study, self-limiting (i.e., their initial growth appears to quickly discontinue). The atomistic views presented here shed first light on the atmospheric corrosion process of Fe(0)-bearing engineered nanostructures and their surfaces in the limit of low bulk impurities. Possible roles of the newly identified oxidized iron dendrites are also discussed in the context of passivation processes limiting technological applications of Fe(0).

Original languageEnglish (US)
Pages (from-to)28225-28232
Number of pages8
JournalJournal of Physical Chemistry C
Issue number49
StatePublished - Dec 13 2018

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films


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