On the passivation of iron particles at the nanoscale

Maximilian Lasserus, Daniel Knez, Martin Schnedlitz, Andreas W. Hauser, Ferdinand Hofer, Wolfgang E. Ernst

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The oxidation of Fe@Au core@shell clusters with sizes below 5 nm is studied via high resolution scanning transmission electron microscopy. The bimetallic nanoparticles are grown in superfluid helium droplets under fully inert conditions, avoiding any effect of solvents or template structures, and deposited on amorphous carbon. Oxidation resistivity is tested by exposure to oxygen at ambient conditions. The passivating effect of Au-shells is studied in detail and a critical Au shell thickness is determined which keeps the Fe core completely unharmed. Additionally, we present the first synthesis of Fe@Au@Fe-oxide onion-type structures.

Original languageEnglish
Pages (from-to)2276-2283
Number of pages8
JournalNanoscale Advances
Volume1
Issue number6
DOIs
Publication statusPublished - 1 Jan 2019

    Fingerprint

ASJC Scopus subject areas

  • Engineering(all)
  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Chemistry(all)

Fields of Expertise

  • Advanced Materials Science

Cite this