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Issue 6, 2019
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On the passivation of iron particles at the nanoscale

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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.

Graphical abstract: On the passivation of iron particles at the nanoscale

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Supplementary files

Article information


Submitted
14 Mar 2019
Accepted
22 Apr 2019
First published
23 Apr 2019

This article is Open Access

Nanoscale Adv., 2019,1, 2276-2283
Article type
Paper

On the passivation of iron particles at the nanoscale

M. Lasserus, D. Knez, M. Schnedlitz, Andreas W. Hauser, F. Hofer and W. E. Ernst, Nanoscale Adv., 2019, 1, 2276
DOI: 10.1039/C9NA00161A

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