Dynamic observation on the functional metal oxide conversion behaviors in Fe3O4/ZnO heterostructures

Chih Yang Huang, Kuo Lun Tai, Chun Wei Huang, Yi Tang Tseng, Hung Yang Lo, Wen Wei Wu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We directly observed the atomic diffusion process of bilayered Fe/ZnO transforming into a Fe3O4/ZnO heterostructure. Significantly, we suggested a unique two-step route in which Fe diffused along [0001]ZnO via boundaries of ZnO and then reacted along [1¯21¯0]ZnO. The specific orientation relationship of [0001]ZnO//[111¯]Fe3O4 could be precisely controlled. In addition, the formation of a ZnO/Fe3O4 heterostructure can be tuned in terms of reaction depth by controlling the annealing time. This study provided a novel nanofabricated method to produce oriented metal oxide heterostructures while visualizing the atomic mechanism of metal oxide formation, which allows for further investigation of promising devices.

Original languageEnglish
Pages (from-to)192-197
Number of pages6
JournalScripta Materialia
Volume177
DOIs
StatePublished - 1 Mar 2020

Keywords

  • Atomic-scale
  • FeO/ZnO heterostructure
  • In-situ TEM
  • Solid-state reaction
  • Unidirectional twin

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