Formation Mechanism of Fe Nanocubes by Magnetron Sputtering Inert Gas Condensation

Junlei Zhao*, Ekaterina Baibuz, Jerome Vernieres, Panagiotis Grammatikopoulos, Ville Jansson, Morten Nagel, Stephan Steinhauer, Mukhles Sowwan, Antti Kuronen, Kai Nordlund, Flyura Djurabekova

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

82 Scopus citations

Abstract

In this work, we study the formation mechanisms of iron nanoparticles (Fe NPs) grown by magnetron sputtering inert gas condensation and emphasize the decisive kinetics effects that give rise specifically to cubic morphologies. Our experimental results, as well as computer simulations carried out by two different methods, indicate that the cubic shape of Fe NPs is explained by basic differences in the kinetic growth modes of {100} and {110} surfaces rather than surface formation energetics. Both our experimental and theoretical investigations show that the final shape is defined by the combination of the condensation temperature and the rate of atomic deposition onto the growing nanocluster. We, thus, construct a comprehensive deposition rate-temperature diagram of Fe NP shapes and develop an analytical model that predicts the temporal evolution of these properties. Combining the shape diagram and the analytical model, morphological control of Fe NPs during formation is feasible; as such, our method proposes a roadmap for experimentalists to engineer NPs of desired shapes for targeted applications.

Original languageEnglish
Pages (from-to)4684-4694
Number of pages11
JournalACS Nano
Volume10
Issue number4
DOIs
StatePublished - 26 Apr 2016
Externally publishedYes

Keywords

  • Fe nanocubes
  • inert gas condensation
  • kinetic Monte Carlo
  • kinetic effect
  • molecular dynamics

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